Gordon Anderson
Joined: 16 Apr 2012 Posts: 41 Location: Switzerland
|
Posted: Wed Jun 01, 2016 8:49 am Post subject: Impedance matching |
|
|
Hi all,
I am trying to hook up audio outputs from a Garrecht TRX-1500 (3Vpp, 8 Ohm) and Dynon Skyview (10V, 50 Ohm, output volume controllable by software setting) into a PMA5000EX (510 Ohm, max 3Vpp input or "damage will occur").
Partial feedback from suppliers is confusing - according to PSE / ACS the Skyview should be OK if I hook it up directly (despite potentially much higher output voltage than the audio panel accepts), but the TRX-1500 is allegedly problematic despite the relatively low output voltage.
I am tending towards fitting a 470 Ohm trim pot across each output as a voltage divider using the wiper as input for the audio panel, more or less as proposed by Garrecht for a line level input.
Can anyone tell me if I am on the right or wrong track?
Gordon Anderson
Switzerland, Van's RV-10 - 41015
| - The Matronics Avionics-List Email Forum - | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Avionics-List |
|
|
|