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emrath(at)comcast.net
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 Posted: Fri Oct 19, 2007 1:45 pm Post subject: Fiber Washer |
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Can anyone tell me where to get a fiber washer insulator set for a 1/8 (aka
3.5mm) panel mount jack? This jack requires a 1/4" hole. This will
insulate the jack from the panel and be used for connecting a ipod to my
audio panel. If these are not available, what have others done to insulate
the ground connection from the panel.
Marty in Brentwood TN
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N1DeltaWhiskey(at)comcast
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| Posted: Fri Oct 19, 2007 6:07 pm Post subject: Fiber Washer |
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I believe the jacks sold through B&C come with the washers. I don't know if
they are available separately.
Doug
---
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nuckolls.bob(at)cox.net
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| Posted: Fri Oct 19, 2007 7:08 pm Post subject: Fiber Washer |
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At 04:44 PM 10/19/2007 -0500, you wrote:
| Quote: |
Can anyone tell me where to get a fiber washer insulator set for a 1/8 (aka
3.5mm) panel mount jack? This jack requires a 1/4" hole. This will
insulate the jack from the panel and be used for connecting a ipod to my
audio panel. If these are not available, what have others done to insulate
the ground connection from the panel.
Marty in Brentwood TN
|
This is an "odd" sized fiber washer for the
a/c industry. I've seen them available on special
order in bags of 100 or 1,000 but never in ones
for end users.
See http://mcmaster.com and do a search for
93920A160 This washer has a 1/4" clearance
hole, extends a .03" barrel through a 5/16"
hole and has a .5" x .04" flange.
A mating flat washer would be 90089A315
Bags of 100 will cost you about $20 total. Considering
how much $time$ you might spend looking for
a few, these might be the lower cost solution.
Alternatively, consider drilling holes in the sheet
metal that will clear all the jack's hardware, probably
.5"
Back up the holes with a sheet of 1/16" fiberglas or
phenolic sheet. Then drill 1/4" holes in fiberglas
to mount the jacks. The insulator sheet can be
bonded into place with something like E6000 to
avoid adding any visible, extra holes in the panel.
Bob . . .
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nuckolls.bob(at)cox.net
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| Posted: Fri Oct 19, 2007 7:08 pm Post subject: Fiber Washer |
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At 07:05 PM 10/19/2007 -0700, you wrote:
| Quote: |
<N1DeltaWhiskey(at)comcast.net>
I believe the jacks sold through B&C come with the washers. I don't know
if they are available separately.
Doug
|
These washers will be for the standard .25" headphone
and .205" microphone jacks, both of which mount in
3/8" holes. Marty is looking for smaller ones.
Bob . . .
----------------------------------------
( "Problems are the price of progress. )
( Don't bring me anything but trouble. )
( Good news weakens me." )
( -Charles F. Kettering- )
----------------------------------------
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peter(at)mather.com
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| Posted: Sat Oct 20, 2007 12:11 am Post subject: Fiber Washer |
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Marty
I used a very short section of heat shrink on the threads that go through
the panel and then a couple of disks of transparent plastic cut from a some
old packaging with a holes made with an appropriately sized hole punch -
works fine
Best Regards
Peter
---
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pwmac(at)sisna.com
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| Posted: Sat Oct 20, 2007 4:53 am Post subject: Fiber Washer |
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If one can find a suitable insulting material.Then make your own
washers. Harbor Freight sells hollow punches. They come in various
sizes. A quick smack with a hammer makes the washer makes OD then
another makes the inside hole. Thin nylon make good insulating
washers. Make 2 washers for a step washer. Only limited by the punch
sizes. However thin tubing will also punch holes in insulating
material. Just sharpen the tube and is will cut things like plastic.
Try the hobby store for choices of tubing. More fun as an experimenter.
Tubing around the conductor is another way, then only one flat washer
is needed.
Paul
============
At 10:07 PM 10/19/2007, you wrote:
| Quote: |
<nuckolls.bob(at)cox.net>
At 04:44 PM 10/19/2007 -0500, you wrote:
>
>
>Can anyone tell me where to get a fiber washer insulator set for a 1/8 (aka
>3.5mm) panel mount jack? This jack requires a 1/4" hole. This will
>insulate the jack from the panel and be used for connecting a ipod to my
>audio panel. If these are not available, what have others done to insulate
>the ground connection from the panel.
>
>Marty in Brentwood TN
This is an "odd" sized fiber washer for the
a/c industry. I've seen them available on special
order in bags of 100 or 1,000 but never in ones
for end users.
See http://mcmaster.com and do a search for
93920A160 This washer has a 1/4" clearance
hole, extends a .03" barrel through a 5/16"
hole and has a .5" x .04" flange.
A mating flat washer would be 90089A315
Bags of 100 will cost you about $20 total. Considering
how much $time$ you might spend looking for
a few, these might be the lower cost solution.
Alternatively, consider drilling holes in the sheet
metal that will clear all the jack's hardware, probably
.5"
Back up the holes with a sheet of 1/16" fiberglas or
phenolic sheet. Then drill 1/4" holes in fiberglas
to mount the jacks. The insulator sheet can be
bonded into place with something like E6000 to
avoid adding any visible, extra holes in the panel.
Bob . . .
|
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hmanvel(at)manvel.com
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| Posted: Sat Oct 20, 2007 5:18 am Post subject: Fiber Washer |
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Go to www.mcmaster.com. Enter "fiber washer" in the search window. They
have anything you could want.
Harry Manvel
---
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emrath(at)comcast.net
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| Posted: Sat Oct 20, 2007 11:17 am Post subject: Fiber Washer |
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Thanks Bob, I forgot to check McMaster for this. I wonder what others are
doing to insulate their music input jacks or is that not needed? What about
not insulating the jack (this is for stereo music input), and just run a
ground wire from the "LO" to my single point ground point?
--------------------> Lo
--------------q left channel
------------------p right channel
Marty
Time: 08:08:29 PM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)cox.net>
Subject: Re: Fiber Washer
At 04:44 PM 10/19/2007 -0500, you wrote:
| Quote: |
Can anyone tell me where to get a fiber washer insulator set for a 1/8
(aka
3.5mm) panel mount jack? This jack requires a 1/4" hole. This will
insulate the jack from the panel and be used for connecting a ipod to my
audio panel. If these are not available, what have others done to insulate
the ground connection from the panel.
Marty in Brentwood TN
|
This is an "odd" sized fiber washer for the
a/c industry. I've seen them available on special
order in bags of 100 or 1,000 but never in ones
for end users.
See http://mcmaster.com and do a search for
93920A160 This washer has a 1/4" clearance
hole, extends a .03" barrel through a 5/16"
hole and has a .5" x .04" flange.
A mating flat washer would be 90089A315
Bags of 100 will cost you about $20 total. Considering
how much $time$ you might spend looking for
a few, these might be the lower cost solution.
Alternatively, consider drilling holes in the sheet
metal that will clear all the jack's hardware, probably
.5"
Back up the holes with a sheet of 1/16" fiberglas or
phenolic sheet. Then drill 1/4" holes in fiberglas
to mount the jacks. The insulator sheet can be
bonded into place with something like E6000 to
avoid adding any visible, extra holes in the panel.
Bob . . .
Marty ҿӬ
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nuckolls.bob(at)cox.net
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| Posted: Sat Oct 20, 2007 11:31 am Post subject: Fiber Washer |
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At 02:15 PM 10/20/2007 -0500, you wrote:
| Quote: | Thanks Bob, I forgot to check McMaster for this. I wonder what others are
doing to insulate their music input jacks or is that not needed? What about
not insulating the jack (this is for stereo music input), and just run a
ground wire from the "LO" to my single point ground point?
--------------------> Lo
--------------q left channel
------------------p right channel
|
Any outlying component of your avionics/audio system
(like mic, phones and audio input jacks) that
has a "mounting ground" should be isolated from the
airframe. This includes virtually all of the
jacks for full size and miniature plugs where the
plug "barrel" is one of the system's connections.
Bob . . .
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