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RG-400 Coax
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kearney



Joined: 20 Sep 2008
Posts: 544

PostPosted: Sat Apr 07, 2018 2:48 pm    Post subject: RG-400 Coax Reply with quote

Hi

I am about to but 100' of RG-400 and see that I can but it from AMAZON for about 2/3 of what the Spruce cost would be.

My question is if all RG-400 is created equal of if I run a quality risk buying from AMAZON versus ACS. RG-400 is even cheaper on EBAY (from China).

Inquiring minds need to know.....

Cheers

Les


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phil(at)philyoder.com
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PostPosted: Sat Apr 07, 2018 3:16 pm    Post subject: RG-400 Coax Reply with quote

I’ve purchased RG-400 on eBay a number of times - but always from domestic vendors. Never had a problem or could I tell a difference from what B&C sells. 
Phil

On Sat, Apr 7, 2018 at 5:54 PM kearney <kearney(at)shaw.ca (kearney(at)shaw.ca)> wrote:

Quote:
--> RV10-List message posted by: "kearney" <kearney(at)shaw.ca (kearney(at)shaw.ca)>

Hi

I am about to but 100' of RG-400 and see that I can but it from AMAZON for about 2/3 of what the Spruce cost would be.

My question is if all RG-400 is created equal of if I run a quality risk buying from AMAZON versus ACS. RG-400 is even cheaper on EBAY (from China).

Inquiring minds need to know.....

Cheers

Les




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maca2790



Joined: 26 Jan 2011
Posts: 52
Location: Australia

PostPosted: Sat Apr 07, 2018 5:19 pm    Post subject: RG-400 Coax Reply with quote

Over the length of the cable runs likely on our Aircraft it will make no noticeable difference between RG400 or even RG58. The only benefit really will be the Teflon Jacket and the double shield on RG400. If I was buying a reel of cable I would buy a reputable brand like Belden or Times Microwave.

Cheers John Mac

On 8 Apr 2018, at 09:16, Phil Yoder <phil(at)philyoder.com (phil(at)philyoder.com)> wrote:
Quote:
I’ve purchased RG-400 on eBay a number of times - but always from domestic vendors. Never had a problem or could I tell a difference from what B&C sells.
Phil

On Sat, Apr 7, 2018 at 5:54 PM kearney <kearney(at)shaw.ca (kearney(at)shaw.ca)> wrote:

Quote:
--> RV10-List message posted by: "kearney" <kearney(at)shaw.ca (kearney(at)shaw.ca)>

Hi

I am about to but 100' of RG-400 and see that I can but it from AMAZON for about 2/3 of what the Spruce cost would be.

My question is if all RG-400 is created equal of if I run a quality risk buying from AMAZON versus ACS. RG-400 is even cheaper on EBAY (from China).

Inquiring minds need to know.....

Cheers

Les




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=479149#479149






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pietflyer



Joined: 19 Jun 2017
Posts: 23

PostPosted: Sat Apr 07, 2018 5:23 pm    Post subject: RG-400 Coax Reply with quote

I've bought a bunch of RG-400' on Amazon. As far as I can tell its identical to that from As&S

Sent from Jack's iPad

Quote:
On Apr 7, 2018, at 6:48 PM, kearney <kearney(at)shaw.ca> wrote:



Hi

I am about to but 100' of RG-400 and see that I can but it from AMAZON for about 2/3 of what the Spruce cost would be.

My question is if all RG-400 is created equal of if I run a quality risk buying from AMAZON versus ACS. RG-400 is even cheaper on EBAY (from China).

Inquiring minds need to know.....

Cheers

Les




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=479149#479149












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Kellym



Joined: 10 Jan 2006
Posts: 1527
Location: Sun Lakes AZ

PostPosted: Sat Apr 07, 2018 5:47 pm    Post subject: RG-400 Coax Reply with quote

Inquiring minds would want to know why you need that much RG-400.
Only you GPS antenna and your transponder and ADS-B out if you need to
do that in Canada, would need it.
No com or nav unit operates on a high enough frequency for it to be of
significant benefit. Yes, the double shielding is nice, theoretically,
but planes operated for over 50 years on RG-58 with more than adequate
performance for VHF. RG-58 is about 1/6th the price of RG-400.

On 4/7/2018 6:18 PM, John MacCallum wrote:
Quote:
Over the length of the cable  runs likely on our Aircraft it will make
no noticeable difference between RG400 or even RG58. The only benefit
really will be the Teflon Jacket and the double shield on RG400. If I
was buying a reel of cable I would buy a reputable brand like Belden or
Times Microwave.

Cheers John Mac

On 8 Apr 2018, at 09:16, Phil Yoder <phil(at)philyoder.com
<mailto:phil(at)philyoder.com>> wrote:

> I’ve purchased RG-400 on eBay a number of times - but always from
> domestic vendors. Never had a problem or could I tell a difference
> from what B&C sells.
> Phil
>
> On Sat, Apr 7, 2018 at 5:54 PM kearney <kearney(at)shaw.ca
> <mailto:kearney(at)shaw.ca>> wrote:
>
>
> <mailto:kearney(at)shaw.ca>>
>
> Hi
>
> I am about to but 100' of RG-400 and see that I can but it from
> AMAZON for about 2/3 of what the Spruce cost would be.
>
> My question is if all RG-400 is created equal of if I run a
> quality risk buying from AMAZON versus ACS. RG-400 is even cheaper
> on EBAY (from China).
>
> Inquiring minds need to know.....
>
> Cheers
>
> Les
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=479149#479149
> ===========
> -List" rel="noreferrer"
> target="_blank">http://www.matronics.com/Navigator?RV10-List
> ===========
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> eferrer" target="_blank">http://forums.matronics.com
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> b Site -
>           -Matt Dralle, List Admin.
> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
> ===========
>
> --
> Phil Yoder phil(at)philyoder.com <mailto:phil(at)philyoder.com>
> \__________o-( )-o__________/ www.itsnotthatcomplex.com
> <http://www.itsnotthatcomplex.com>


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jesse(at)saintaviation.co
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PostPosted: Sat Apr 07, 2018 5:59 pm    Post subject: RG-400 Coax Reply with quote

I use RG400 for any new coax runs in any airplane I work on, and I know many others do too. It’s much easier to get a good crimp and good solid connectors on RG400 than RG58. I buy RG400 1000’ at a time. It is substantially cheaper in those quantities. I always buy from Wiremaster.

Jesse Saint
Saint Aviation, Inc.
352-427-0285
jesse(at)saintaviation.com

Sent from my iPad

Quote:
On Apr 7, 2018, at 9:46 PM, Kelly McMullen <kellym(at)aviating.com> wrote:



Inquiring minds would want to know why you need that much RG-400.
Only you GPS antenna and your transponder and ADS-B out if you need to do that in Canada, would need it.
No com or nav unit operates on a high enough frequency for it to be of significant benefit. Yes, the double shielding is nice, theoretically, but planes operated for over 50 years on RG-58 with more than adequate performance for VHF. RG-58 is about 1/6th the price of RG-400.

> On 4/7/2018 6:18 PM, John MacCallum wrote:
> Over the length of the cable runs likely on our Aircraft it will make no noticeable difference between RG400 or even RG58. The only benefit really will be the Teflon Jacket and the double shield on RG400. If I was buying a reel of cable I would buy a reputable brand like Belden or Times Microwave.
> Cheers John Mac
>> On 8 Apr 2018, at 09:16, Phil Yoder <phil(at)philyoder.com <mailto:phil(at)philyoder.com>> wrote:
>> I’ve purchased RG-400 on eBay a number of times - but always from domestic vendors. Never had a problem or could I tell a difference from what B&C sells.
>> Phil
>>
>>
>>
>> On Sat, Apr 7, 2018 at 5:54 PM kearney <kearney(at)shaw.ca <mailto:kearney(at)shaw.ca>> wrote:
>>
>>
>> <mailto:kearney(at)shaw.ca>>
>>
>> Hi
>>
>> I am about to but 100' of RG-400 and see that I can but it from
>> AMAZON for about 2/3 of what the Spruce cost would be.
>>
>> My question is if all RG-400 is created equal of if I run a
>> quality risk buying from AMAZON versus ACS. RG-400 is even cheaper
>> on EBAY (from China).
>>
>> Inquiring minds need to know.....
>>
>> Cheers
>>
>> Les
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=479149#479149
>>
>>
>>
>>
>>
>>
>> ===========
>> -List" rel="noreferrer"
>> target="_blank">http://www.matronics.com/Navigator?RV10-List
>> ===========
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
>> ===========
>> WIKI -
>> errer" target="_blank">http://wiki.matronics.com
>> ===========
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
>> ===========
>>
>>
>>
>> --
>> Phil Yoder phil(at)philyoder.com <mailto:phil(at)philyoder.com> \__________o-( )-o__________/ www.itsnotthatcomplex.com <http://www.itsnotthatcomplex.com>





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kearney



Joined: 20 Sep 2008
Posts: 544

PostPosted: Sat Apr 07, 2018 6:06 pm    Post subject: Re: RG-400 Coax Reply with quote

Kelley

It was my understanding that RG400 was preferred for a/c. Based on your comment I will check into this with Stein before I order anything.

I have two comm runs to the tail along with a VOR/ILS antenna. That with the 2 GPS antennas and XM weather and it adds up quickly.

Cheers

Les


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jdriggs49(at)MSN.COM
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PostPosted: Sat Apr 07, 2018 6:25 pm    Post subject: RG-400 Coax Reply with quote

I'm installing a Garmin GDL82 into a Cessna 150M. Tied in with the existing transponder will give it a relative cheap way to obtain ADS-B 2020 out. The install directions call for the use of RG400 because of the extra shielding affect. Most electronic installs call for RG400 these days. I buy most all my coax from Spruce as the cable pretty much comes from the same places no matter where you buy lt.

Sent from my iPad

Quote:
On Apr 7, 2018, at 9:14 PM, Jesse Saint <jesse(at)saintaviation.com> wrote:



I use RG400 for any new coax runs in any airplane I work on, and I know many others do too. It’s much easier to get a good crimp and good solid connectors on RG400 than RG58. I buy RG400 1000’ at a time. It is substantially cheaper in those quantities. I always buy from Wiremaster.

Jesse Saint
Saint Aviation, Inc.
352-427-0285
jesse(at)saintaviation.com

Sent from my iPad

> On Apr 7, 2018, at 9:46 PM, Kelly McMullen <kellym(at)aviating.com> wrote:
>
>
>
> Inquiring minds would want to know why you need that much RG-400.
> Only you GPS antenna and your transponder and ADS-B out if you need to do that in Canada, would need it.
> No com or nav unit operates on a high enough frequency for it to be of significant benefit. Yes, the double shielding is nice, theoretically, but planes operated for over 50 years on RG-58 with more than adequate performance for VHF. RG-58 is about 1/6th the price of RG-400.
>
>> On 4/7/2018 6:18 PM, John MacCallum wrote:
>> Over the length of the cable runs likely on our Aircraft it will make no noticeable difference between RG400 or even RG58. The only benefit really will be the Teflon Jacket and the double shield on RG400. If I was buying a reel of cable I would buy a reputable brand like Belden or Times Microwave.
>> Cheers John Mac
>>> On 8 Apr 2018, at 09:16, Phil Yoder <phil(at)philyoder.com <mailto:phil(at)philyoder.com>> wrote:
>>> I’ve purchased RG-400 on eBay a number of times - but always from domestic vendors. Never had a problem or could I tell a difference from what B&C sells.
>>> Phil
>>>
>>>
>>>
>>> On Sat, Apr 7, 2018 at 5:54 PM kearney <kearney(at)shaw.ca <mailto:kearney(at)shaw.ca>> wrote:
>>>
>>>
>>> <mailto:kearney(at)shaw.ca>>
>>>
>>> Hi
>>>
>>> I am about to but 100' of RG-400 and see that I can but it from
>>> AMAZON for about 2/3 of what the Spruce cost would be.
>>>
>>> My question is if all RG-400 is created equal of if I run a
>>> quality risk buying from AMAZON versus ACS. RG-400 is even cheaper
>>> on EBAY (from China).
>>>
>>> Inquiring minds need to know.....
>>>
>>> Cheers
>>>
>>> Les
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=479149#479149
>>>
>>>
>>>
>>>
>>>
>>>
>>> ===========
>>> -List" rel="noreferrer"
>>> target="_blank">http://www.matronics.com/Navigator?RV10-List
>>> ===========
>>> FORUMS -
>>> eferrer" target="_blank">http://forums.matronics.com
>>> ===========
>>> WIKI -
>>> errer" target="_blank">http://wiki.matronics.com
>>> ===========
>>> b Site -
>>> -Matt Dralle, List Admin.
>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
>>> ===========
>>>
>>>
>>>
>>> --
>>> Phil Yoder phil(at)philyoder.com <mailto:phil(at)philyoder.com> \__________o-( )-o__________/ www.itsnotthatcomplex.com <http://www.itsnotthatcomplex.com>
>
>
>







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Kellym



Joined: 10 Jan 2006
Posts: 1527
Location: Sun Lakes AZ

PostPosted: Sat Apr 07, 2018 6:50 pm    Post subject: RG-400 Coax Reply with quote

Of course the folks that sell the cable will recommend RG-400. It is the
default, whether needed or not. Kind of like whether you choose Goodyear
Flight Custom III tires or something at 1/2 the cost. Just like Lycoming
will tell you that you can cruise your engine at 425 degrees all day long.
All transponders, and ADS-B and GPS operate at or above 1000 Mhz, which
requires better cabling and lower loss. All com and VHF nav operate at
1/10th those frequencies. Yes, RG-400 may theoretically last longer, but
it is rare to see problems with RG-58 for VHF at 50 years or more,
unless the plane lives outside in a hot climate its whole life. Just my
experience with more than one aircraft I have owned that was
manufactured and avionics installed more than 50 years ago. Even
transponders installed in the 70s used RG-58, though they learned later
it was sub-optimal..my last aircraft before the RV was 53 years old and
got a transponder in the early 70's, it still had the same RG-58
transponder antenna cable when I sold it, and had no ATC issues, nor
passing 2 year checks. I have RG-58 for my VHF use in my RV-10, and have
no trouble talking to anyone at any altitude that you would expect to
have line of sight.
You can spend over $300 for cable if you want, or you can spend under
$100 and get 98% of the performance of the expensive stuff. It is
experimental and your choice, and nobody has to justify to anyone
else...you just want it.
Just like you can install a Garmin 500 or 600 panel if that is what you
want, or you can do a G3X, or Dynon, AFS, Grand Rapids or MGL...you get
to pick.


4/7/2018 7:24 PM, Danny Riggs wrote:
Quote:


I'm installing a Garmin GDL82 into a Cessna 150M. Tied in with the existing transponder will give it a relative cheap way to obtain ADS-B 2020 out. The install directions call for the use of RG400 because of the extra shielding affect. Most electronic installs call for RG400 these days. I buy most all my coax from Spruce as the cable pretty much comes from the same places no matter where you buy lt.

Sent from my iPad

> On Apr 7, 2018, at 9:14 PM, Jesse Saint <jesse(at)saintaviation.com> wrote:
>
>
>
> I use RG400 for any new coax runs in any airplane I work on, and I know many others do too. It’s much easier to get a good crimp and good solid connectors on RG400 than RG58. I buy RG400 1000’ at a time. It is substantially cheaper in those quantities. I always buy from Wiremaster.
>
> Jesse Saint
> Saint Aviation, Inc.
> 352-427-0285
> jesse(at)saintaviation.com
>
> Sent from my iPad
>
>> On Apr 7, 2018, at 9:46 PM, Kelly McMullen <kellym(at)aviating.com> wrote:
>>
>>
>>
>> Inquiring minds would want to know why you need that much RG-400.
>> Only you GPS antenna and your transponder and ADS-B out if you need to do that in Canada, would need it.
>> No com or nav unit operates on a high enough frequency for it to be of significant benefit. Yes, the double shielding is nice, theoretically, but planes operated for over 50 years on RG-58 with more than adequate performance for VHF. RG-58 is about 1/6th the price of RG-400.
>>
>>> On 4/7/2018 6:18 PM, John MacCallum wrote:
>>> Over the length of the cable runs likely on our Aircraft it will make no noticeable difference between RG400 or even RG58. The only benefit really will be the Teflon Jacket and the double shield on RG400. If I was buying a reel of cable I would buy a reputable brand like Belden or Times Microwave.
>>> Cheers John Mac
>>>> On 8 Apr 2018, at 09:16, Phil Yoder <phil(at)philyoder.com <mailto:phil(at)philyoder.com>> wrote:
>>>> I’ve purchased RG-400 on eBay a number of times - but always from domestic vendors. Never had a problem or could I tell a difference from what B&C sells.
>>>> Phil
>>>>
>>>>
>>>>
>>>> On Sat, Apr 7, 2018 at 5:54 PM kearney <kearney(at)shaw.ca <mailto:kearney(at)shaw.ca>> wrote:
>>>>
>>>>
>>>> <mailto:kearney(at)shaw.ca>>
>>>>
>>>> Hi
>>>>
>>>> I am about to but 100' of RG-400 and see that I can but it from
>>>> AMAZON for about 2/3 of what the Spruce cost would be.
>>>>
>>>> My question is if all RG-400 is created equal of if I run a
>>>> quality risk buying from AMAZON versus ACS. RG-400 is even cheaper
>>>> on EBAY (from China).
>>>>
>>>> Inquiring minds need to know.....
>>>>
>>>> Cheers
>>>>
>>>> Les
>>>>
>>>>
>>>>
>>>>
>>>> Read this topic online here:
>>>>
>>>> http://forums.matronics.com/viewtopic.php?p=479149#479149
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ===========
>>>> -List" rel="noreferrer"
>>>> target="_blank">http://www.matronics.com/Navigator?RV10-List
>>>> ===========
>>>> FORUMS -
>>>> eferrer" target="_blank">http://forums.matronics.com
>>>> ===========
>>>> WIKI -
>>>> errer" target="_blank">http://wiki.matronics.com
>>>> ===========
>>>> b Site -
>>>> -Matt Dralle, List Admin.
>>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
>>>> ===========
>>>>
>>>>
>>>>
>>>> --
>>>> Phil Yoder phil(at)philyoder.com <mailto:phil(at)philyoder.com> \__________o-( )-o__________/ www.itsnotthatcomplex.com <http://www.itsnotthatcomplex.com>
>>
>>
>>
>






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A&P/IA, EAA Tech Counselor # 5286
KCHD
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Kellym



Joined: 10 Jan 2006
Posts: 1527
Location: Sun Lakes AZ

PostPosted: Sat Apr 07, 2018 6:53 pm    Post subject: RG-400 Coax Reply with quote

Interesting. Never had an issue installing crimp BNC on RG-58, nor did I
find crimps on RG-400 any easier, and the RG-58 is easier to trim the
insulation for the crimp. More like do you need iPhone 6,7 or X?

On 4/7/2018 6:59 PM, Jesse Saint wrote:
Quote:


I use RG400 for any new coax runs in any airplane I work on, and I know many others do too. It’s much easier to get a good crimp and good solid connectors on RG400 than RG58. I buy RG400 1000’ at a time. It is substantially cheaper in those quantities. I always buy from Wiremaster.

Jesse Saint
Saint Aviation, Inc.
352-427-0285
jesse(at)saintaviation.com

Sent from my iPad



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KCHD
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iansdad



Joined: 06 Aug 2011
Posts: 13

PostPosted: Sat Apr 07, 2018 7:05 pm    Post subject: RG-400 Coax Reply with quote

Hi Kelly..a turn if life events has changed my direction on completing my RV10 project. The first thing that comes to focus is my new IO540. I have a new (out of the box parts new) IO 540 Thunderbolt Lycoming engine assembled by Aircraft Engine Specialists in Chandler, Arizona with appropriate design to be a D4A5 for a RV10. Also included an upgraded electronic mag on one side that will increase HP and we can provide that detail. Please spread the word, I will be listing soon on Barnstormers and Vans Air Force.

Sent from Mail for Windows 10

From: owner-rv10-list-server(at)matronics.com <owner-rv10-list-server(at)matronics.com> on behalf of Kelly McMullen <kellym(at)aviating.com>
Sent: Saturday, April 7, 2018 7:49:38 PM
To: rv10-list(at)matronics.com
Subject: Re: RG-400 Coax


--> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com>

Of course the folks that sell the cable will recommend RG-400. It is the
default, whether needed or not. Kind of like whether you choose Goodyear
Flight Custom III tires or something at 1/2 the cost. Just like Lycoming
will tell you that you can cruise your engine at 425 degrees all day long.
All transponders, and ADS-B and GPS operate at or above 1000 Mhz, which
requires better cabling and lower loss. All com and VHF nav operate at
1/10th those frequencies. Yes, RG-400 may theoretically last longer, but
it is rare to see problems with RG-58 for VHF at 50 years or more,
unless the plane lives outside in a hot climate its whole life. Just my
experience with more than one aircraft I have owned that was
manufactured and avionics installed more than 50 years ago. Even
transponders installed in the 70s used RG-58, though they learned later
it was sub-optimal..my last aircraft before the RV was 53 years old and
got a transponder in the early 70's, it still had the same RG-58
transponder antenna cable when I sold it, and had no ATC issues, nor
passing 2 year checks. I have RG-58 for my VHF use in my RV-10, and have
no trouble talking to anyone at any altitude that you would expect to
have line of sight.
You can spend over $300 for cable if you want, or you can spend under
$100 and get 98% of the performance of the expensive stuff. It is
experimental and your choice, and nobody has to justify to anyone
else...you just want it.
Just like you can install a Garmin 500 or 600 panel if that is what you
want, or you can do a G3X, or Dynon, AFS, Grand Rapids or MGL...you get
to pick.




4/7/2018 7:24 PM, Danny Riggs wrote:
> --> RV10-List message posted by: Danny Riggs <jdriggs49(at)msn.com>
>
> I'm installing a Garmin GDL82 into a Cessna 150M. Tied in with the existing transponder will give it a relative cheap way to obtain ADS-B 2020 out. The install directions call for the use of RG400 because of the extra shielding affect. Most electronic installs call for RG400 these days. I buy most all my coax from Spruce as the cable pretty much comes from the same places no matter where you buy lt.
>
> Sent from my iPad
>
>> On Apr 7, 2018, at 9:14 PM, Jesse Saint <jesse(at)saintaviation.com> wrote:
>>
>> --> RV10-List message posted by: Jesse Saint <jesse(at)saintaviation.com>
>>
>> I use RG400 for any new coax runs in any airplane I work on, and I know many others do too. Its much easier to get a good crimp and good solid connectors on RG400 than RG58. I buy RG400 1000 at a time. It is substantially cheaper in those quantities. I always buy from Wiremaster.
>>
>> Jesse Saint
>> Saint Aviation, Inc.
>> 352-427-0285
>> jesse(at)saintaviation.com
>>
>> Sent from my iPad
>>
>>> On Apr 7, 2018, at 9:46 PM, Kelly McMullen <kellym(at)aviating.com> wrote:
>>>
>>> --> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com>
>>>
>>> Inquiring minds would want to know why you need that much RG-400.
>>> Only you GPS antenna and your transponder and ADS-B out if you need to do that in Canada, would need it.
>>> No com or nav unit operates on a high enough frequency for it to be of significant benefit. Yes, the double shielding is nice, theoretically, but planes operated for over 50 years on RG-58 with more than adequate performance for VHF. RG-58 is about 1/6th the price of RG-400.
>>>
>>>> On 4/7/2018 6:18 PM, John MacCallum wrote:
>>>> Over the length of the cable runs likely on our Aircraft it will make no noticeable difference between RG400 or even RG58. The only benefit really will be the Teflon Jacket and the double shield on RG400. If I was buying a reel of cable I would buy a reputable brand like Belden or Times Microwave.
>>>> Cheers John Mac
>>>>> On 8 Apr 2018, at 09:16, Phil Yoder <phil(at)philyoder.com <mailto:phil(at)philyoder.com (phil(at)philyoder.com)>> wrote:
>>>>> Ive purchased RG-400 on eBay a number of times - but always from domestic vendors. Never had a problem or could I tell a difference from what B&C sells.
>>>>> Phil
>>>>>
>>>>>
>>>>>
>>>>> On Sat, Apr 7, 2018 at 5:54 PM kearney <kearney(at)shaw.ca <mailto:kearney(at)shaw.ca (kearney(at)shaw.ca)>> wrote:
>>>>>
>>>>> --> RV10-List message posted by: "kearney" <kearney(at)shaw.ca
>>>>> <mailto:kearney(at)shaw.ca (kearney(at)shaw.ca)>>
>>>>>
>>>>> Hi
>>>>>
>>>>> I am about to but 100' of RG-400 and see that I can but it from
>>>>> AMAZON for about 2/3 of what the Spruce cost would be.
>>>>>
>>>>> My question is if all RG-400 is created equal of if I run a
>>>>> quality risk buying from AMAZON versus ACS. RG-400 is even cheaper
>>>>> on EBAY (from China).
>>>>>
>>>>> Inquiring minds need to know.....
>>>>>
>>>>> Cheers
>>>>>
>>>>> Les
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Read this topic online here:
>>>>>
>>>>> http://forums.matronics.com/viewtopic.php?p=479149#479149
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ===========
>>>>> -List" rel="noreferrer"
>>>>> target="_blank">http://www.matronics.com/Navigator?RV10-List
>>>>> ===========
>>>>> FORUMS -
>>>>> eferrer" target="_blank">http://forums.matronics.com
>>>>> ===========
>>>>> WIKI -
>>>>> errer" target="_blank">http://wiki.matronics.com
>>>>> ===========
>>>>> b Site -
>>>>> -Matt Dralle, List Admin.
>>>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
>>>>> ===========
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Phil Yoder phil(at)philyoder.com <mailto:phil(at)philyoder.com (phil(at)philyoder.com)> \__________o-( )-o__________/ www.itsnotthatcomplex.com <http://www.itsnotthatcomplex.com>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>
>
>
>
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rleffler



Joined: 05 Nov 2006
Posts: 639

PostPosted: Sun Apr 08, 2018 12:24 am    Post subject: RG-400 Coax Reply with quote

Your install manuals will specify the manufacturers requirements for type and length of cable.


Get Outlook for iOS


From: owner-rv10-list-server(at)matronics.com <owner-rv10-list-server(at)matronics.com> on behalf of kearney <kearney(at)shaw.ca>
Sent: Saturday, April 7, 2018 10:06:20 PM
To: rv10-list(at)matronics.com
Subject: Re: RG-400 Coax


--> RV10-List message posted by: "kearney" <kearney(at)shaw.ca>

Kelley

It was my understanding that RG400 was preferred for a/c. Based on your comment I will check into this with Stein before I order anything.

I have two comm runs to the tail along with a VOR/ILS antenna. That with the 2 GPS antennas and XM weather and it adds up quickly.

Cheers

Les




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=479159#479159






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Kellym



Joined: 10 Jan 2006
Posts: 1527
Location: Sun Lakes AZ

PostPosted: Sun Apr 08, 2018 6:57 am    Post subject: RG-400 Coax Reply with quote

On 4/8/2018 1:24 AM, Bob Leffler wrote:
> Your install manuals will specify the manufacturers requirements for
> type and length of cable.
>
> Get Outlook for iOS <https://aka.ms/o0ukef>
> ------------------------------------------------------------------------

I looked through the manuals I have on hand. The KX-155/165 manual only
mentions RG-58. That includes its discussion of what is approved for
full TSO approval.
The GNS-400 series mentions 50 ohm shielded cable. I didn't find mention
of RG-400 (alternate RG-142) until I got to the GTN-600 series install
manual. In other words, even Garmin didn't start recommending RG-400
until about 10 years ago.
The Dynon Skyview manual asserts that double shielded cable will deliver
"more" transmit power and receive signal than single shielded, with no
definition or quantification of how much more.
It is funny that the SL-30 manual calls for RG-142, and Garmin shows it
as acceptable alternate. RG-142 has a solid core connector, not
stranded. It is double shielded like RG-400. There was a discussion on
VAF about the differences, and pointing out that it has only been
sometime after the turn of the century that RG-400 started being
recommended.
IF you anticipate a "noisy" RF environment in your cockpit, go for the
best cable you can get. If your aircraft will have typical noise (very
little) you can choose whether you want to save a couple hundred bucks
or not.
Note that nothing has changed in VHF electronic signal transmission
since the days of the coffee grinder and crystal controlled transmitters.
The internal electronics have been better shielded to avoid transmission
of the RF generated during amplification of signals, etc. so that we get
better quality audio. Apollo introduced digital signal processing..maybe
that influences the call for better shielding..who knows.
It is pretty much the same difference as whether you choose to operate
at 75% power for all cruise, or if you choose to go high enough to
operate at 60-65% power and save a lot of fuel while sacrificing about
5-8% speed. Your airplane and money, your choice.
I haven't seen any install manual yet that says RG-400 is mandatory for
com or VHF nav...only for GPS.


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Kellym



Joined: 10 Jan 2006
Posts: 1527
Location: Sun Lakes AZ

PostPosted: Sun Apr 08, 2018 7:03 am    Post subject: RG-400 Coax Reply with quote

I forgot to mention that we should discuss whether Les should prime his
antenna cables and with which type of primer. Wink

On 4/8/2018 7:57 AM, Kelly McMullen wrote:
Quote:


On 4/8/2018 1:24 AM, Bob Leffler wrote:
> Your install manuals will specify the manufacturers requirements for
> type and length of cable.
>
> Get Outlook for iOS <https://aka.ms/o0ukef>
> ------------------------------------------------------------------------

I looked through the manuals I have on hand. The KX-155/165 manual only
mentions RG-58. That includes its discussion of what is approved for
full TSO approval.


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Bob Turner



Joined: 03 Jan 2009
Posts: 824
Location: Castro Valley, CA

PostPosted: Sun Apr 08, 2018 12:26 pm    Post subject: Re: RG-400 Coax Reply with quote

Kellym wrote:
I forgot to mention that we should discuss whether Les should prime his
antenna cables and with which type of primer. Wink



That’s actually a good analogy. Nearly any primer will look good tomorrow. How will it perform in 10 years? Same question about less expensive/more expensive coax on VHF radios. Only the builder can decide if the cost difference is worth the risk/benefit.


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maca2790



Joined: 26 Jan 2011
Posts: 52
Location: Australia

PostPosted: Sun Apr 08, 2018 5:40 pm    Post subject: RG-400 Coax Reply with quote

RG58 will work because the cable run is only short. The losses for a few metres of Coax are not noticeable to us as users. There is an advantage though with the double shielding and the Teflon outer Jacket of RG400. Less induced noise and better abrasion resistance. Also it is better to use Multi Stand rather than solid core cables because of vibration. For the money it costs to use RG400 compared to the over all costs involved with the building process, in my opinion, RG400 is the way to go!

Cheers John MacCallum
RV10
VH-DUU
Flying

Quote:
On 9 Apr 2018, at 00:57, Kelly McMullen <kellym(at)aviating.com> wrote:



On 4/8/2018 1:24 AM, Bob Leffler wrote:
> Your install manuals will specify the manufacturer’s requirements for
> type and length of cable.
>
> Get Outlook for iOS <https://aka.ms/o0ukef>
> ------------------------------------------------------------------------

I looked through the manuals I have on hand. The KX-155/165 manual only mentions RG-58. That includes its discussion of what is approved for full TSO approval.
The GNS-400 series mentions 50 ohm shielded cable. I didn't find mention of RG-400 (alternate RG-142) until I got to the GTN-600 series install manual. In other words, even Garmin didn't start recommending RG-400 until about 10 years ago.
The Dynon Skyview manual asserts that double shielded cable will deliver "more" transmit power and receive signal than single shielded, with no definition or quantification of how much more.
It is funny that the SL-30 manual calls for RG-142, and Garmin shows it as acceptable alternate. RG-142 has a solid core connector, not stranded. It is double shielded like RG-400. There was a discussion on VAF about the differences, and pointing out that it has only been sometime after the turn of the century that RG-400 started being recommended.
IF you anticipate a "noisy" RF environment in your cockpit, go for the best cable you can get. If your aircraft will have typical noise (very little) you can choose whether you want to save a couple hundred bucks or not.
Note that nothing has changed in VHF electronic signal transmission since the days of the coffee grinder and crystal controlled transmitters.
The internal electronics have been better shielded to avoid transmission of the RF generated during amplification of signals, etc. so that we get better quality audio. Apollo introduced digital signal processing..maybe that influences the call for better shielding..who knows.
It is pretty much the same difference as whether you choose to operate at 75% power for all cruise, or if you choose to go high enough to operate at 60-65% power and save a lot of fuel while sacrificing about 5-8% speed. Your airplane and money, your choice.
I haven't seen any install manual yet that says RG-400 is mandatory for com or VHF nav...only for GPS.







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kearney



Joined: 20 Sep 2008
Posts: 544

PostPosted: Mon Apr 09, 2018 6:43 am    Post subject: Re: RG-400 Coax Reply with quote

Hi Kelley

If I use a silicone based primer on my COAX cable will the electrons flow faster?

Inquiring minds really, really need to know.

Les Idea


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philperry9



Joined: 23 Nov 2011
Posts: 348

PostPosted: Mon Apr 09, 2018 6:50 am    Post subject: RG-400 Coax Reply with quote

I primed the inside of my coax. No problems noted. Fairly tedious task but worth the effort.

Sent from my iPhone

Quote:
On Apr 9, 2018, at 9:43 AM, kearney <kearney(at)shaw.ca> wrote:



Hi Kelley

If I use a silicone based primer on my COAX cable will the electrons flow faster?

Inquiring minds really, really need to know.

Les [Idea]




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=479194#479194











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stein(at)steinair.com
Guest





PostPosted: Mon Apr 09, 2018 6:53 am    Post subject: RG-400 Coax Reply with quote

Without getting into the argument on technicalities or superiorities of one
over the other, I'll just provide my 2 cents on the import vs domestic.

I've seen quite a bit of domestic as well as import wire, and like many
things that get imported what you see (or is advertised) is not always what
you get. We've seen some copycat "RG" (various spec's and types) that is a
pretty good knockoff, until you realize the plating on the wire strands is
tin (or even less) vs. true silver plated copper for domestically produced
mil spec. Speaking of copper, some of the conductors I've seen are just some
version of aluminum or pot metal, cleverly disguised. I've seen some that
corrodes badly/quickly, some that was laughable and some that was passable.
I'm always amazed at how much work some of the import companies will go
through to copy something so closely, only to produce garbage (that looks
good).

Now I'm certainly not saying all import or surplus wire is that way - I've
seen some that is pretty good....but when you see it for ridiculously low
prices (below what someone could manufacture it for using the raw materials
that it's made out of) it's often true of the old mantra "if it sounds like
a duck and looks like a duck"...and speaking of surplus, I have seen quite a
bit of water/hurricane damaged wire with internal corrosion. Looks good on
the outside, not so much on the inside where the water has wicked up into
the wire. Again, not all surplus is a bad thing. Some is simply
surplus...but a good deal of it is someone passing of junk - literally.
This is true whether it be 400, 58, tefzel wire, and a lot of other things
(as we all know from experience).

In some (not all) cases, you may have just stepped over a dollar to pick up
a dime.

Just my 2 cents as usual!

Cheers,
Stein
--


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Tim Olson



Joined: 25 Jan 2007
Posts: 2752

PostPosted: Mon Apr 09, 2018 8:22 am    Post subject: RG-400 Coax Reply with quote

One thing to add to Stein's comments.

I've seen RG400 shipped with some good gooey glue put over the ends
specifically to prevent internal corrosion. You probably want to
make sure you buy from a good vendor who doesn't just have
their cable stored in a damp environment that would wreck the
cabling. Obviously that moisture is a problem.

One other thing regarding 100' vs shorter. You may want to compare
the 100' price vs just buying what you need. I'm not sure which
would be the best price. But, RG400 is probably one of the easiest
types of wire to estimate cost for in your plane before you buy
it, since it's not used in as many circuits and you only use one
strand at a time. So you can just estimate what you need and add
a few feet and it may save you money buying NOT in bulk.
Depends.

And, as I'm not afraid to jump into the 400 vs other discussion,
my opinion is I'd rather buy one type of wire and have it be the
best wire I can build than buy 2 types. I don't have anything
but RG400 in my planes. When the plane costs $100K+, saving
a few dollars on wire isn't my goal. My goal is having an airplane
in the end that is superior to what I would get if I bought most
other airplanes.

Tim
On 04/09/2018 09:53 AM, Stein Bruch wrote:
Quote:


Without getting into the argument on technicalities or superiorities of one
over the other, I'll just provide my 2 cents on the import vs domestic.

I've seen quite a bit of domestic as well as import wire, and like many
things that get imported what you see (or is advertised) is not always what
you get. We've seen some copycat "RG" (various spec's and types) that is a
pretty good knockoff, until you realize the plating on the wire strands is
tin (or even less) vs. true silver plated copper for domestically produced
mil spec. Speaking of copper, some of the conductors I've seen are just some
version of aluminum or pot metal, cleverly disguised. I've seen some that
corrodes badly/quickly, some that was laughable and some that was passable.
I'm always amazed at how much work some of the import companies will go
through to copy something so closely, only to produce garbage (that looks
good).

Now I'm certainly not saying all import or surplus wire is that way - I've
seen some that is pretty good....but when you see it for ridiculously low
prices (below what someone could manufacture it for using the raw materials
that it's made out of) it's often true of the old mantra "if it sounds like
a duck and looks like a duck"...and speaking of surplus, I have seen quite a
bit of water/hurricane damaged wire with internal corrosion. Looks good on
the outside, not so much on the inside where the water has wicked up into
the wire. Again, not all surplus is a bad thing. Some is simply
surplus...but a good deal of it is someone passing of junk - literally.
This is true whether it be 400, 58, tefzel wire, and a lot of other things
(as we all know from experience).

In some (not all) cases, you may have just stepped over a dollar to pick up
a dime.

Just my 2 cents as usual!

Cheers,
Stein



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