If you end up having to send the radio to the Dittel man in Florida be exceedingly specific about the problem. Some years back my Dittel would transmit but not receive. Sent it to be fixed and it came back with report that there was no problem. There was still. No noise st all over the speaker. Put another identical radio into my glider and it worked (easy system check if one is available). So then spent the money and sent radio to Germany.
Instant report from there -- some small cheap item in circuit to speaker was dead,fixed and it was on way back. The German report was that the circuit that drove a headset was working perfectly, problem isolated to speaker output. Florida had the German believed used headset when it checked.
Lots of added dollar cost for this one.






On Monday, September 19, 2016 at 12:23:09 PM UTC-4, AS wrote:
I have a question for all the electronic wizards out there. My radio is only giving a carrier signal but no modulation. I have the following set-up:
Dittel FSG71M
Dittel speaker box F10061 with two DIN connectors for two microphones (only one used)
Dynamic goose neck microphone F10039

I tried both goose neck mic.'s I have in both positions on the box.
The yellow LED on the radio turns on but no voice transmission occurs.
The power supply is provided by two 12V, 9.6Ah Lithium Iron Phosphate batteries in parallel which are rock-solid.

Any suggestion for where to start trouble-shooting?

Thanks,

Uli