[arm-allstar] BF888S and RF Feedback

[Doug Crompton]

Joe,

 In parallel, and I did it at the DB25 end in the connector to the FOB - pin 1 PTT to pin 19 or 20 gnd. As I remember the value was not critical. I found .001 and larger worked. 
73 Doug
WA3DSP
http://www.crompton.com/hamradio


From: joe at ad2dx.us
To: arm-allstar at hamvoip.org
Date: Sat, 14 Mar 2015 22:54:55 +0000
Subject: [arm-allstar] BF888S and RF Feedback






Hi Doug,
I have the BF888S but when transmitting, I am getting RF feedback. I suspect that’s what you meant by motorboating in your article. When you placed a .01uF cap, did you put it in series with the PTT line or parallel across PTT and ground? I assumed
 that the PTT line was a DC signal so I thought that the cap in series wouldn’t do anything. I have to run out to RS to get the cap but when I get back I hope to install it.



I got the URI, and the BBB all set up, just the RF feedback.
Thanks again.




73
Joe - AD2DX










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