Wed Jun 06, 2018 2:24 pm
#1616094
Hi,
I am having problems adding an intercom to my Yaesu FTA-550.
When I connect the radio to the intercom the sound in both headsets goes very distorted and is often unintelligible when the engine is at cruise power, disconnected it's clear.
Also, when I transmit or use the pilot isolate switch there's a little improvement.
The radio communications are crystal clear when used with one of my two DC 10-60's straight into the radio.
I've tried a Flightcom 11sx and a Flighttech 401 intercom.
There is no information anywhere, I can find, that describes this problem.
I have emailed Yaesu and Flightcom but had no reply.
Has anyone had a similar issue and managed to resolve it?
I think the technical reason is that the Yaesu mic input impedance is very low at 150 ohms and it's loading the output of the intercom too much. I can simulate this by shorting the intercom output to ground.
I'm in the process of making a buffer amplifier to sit between the two but I can't believe that this is the only solution!
Thanks
I am having problems adding an intercom to my Yaesu FTA-550.
When I connect the radio to the intercom the sound in both headsets goes very distorted and is often unintelligible when the engine is at cruise power, disconnected it's clear.
Also, when I transmit or use the pilot isolate switch there's a little improvement.
The radio communications are crystal clear when used with one of my two DC 10-60's straight into the radio.
I've tried a Flightcom 11sx and a Flighttech 401 intercom.
There is no information anywhere, I can find, that describes this problem.
I have emailed Yaesu and Flightcom but had no reply.
Has anyone had a similar issue and managed to resolve it?
I think the technical reason is that the Yaesu mic input impedance is very low at 150 ohms and it's loading the output of the intercom too much. I can simulate this by shorting the intercom output to ground.
I'm in the process of making a buffer amplifier to sit between the two but I can't believe that this is the only solution!
Thanks