Re: soundmodem

[Larry Levesque <ka1vgm@gmail.com>]

Sounds like you need to switch you radio to the correct mode.

I am guessing it is a Yaesu and you have it set for Packet/data which 
wants to use the data jack on the back.

Try switching it to a standard mode and use the mic jack or use the data 
jack for the data modes.


On 02/27/2014 11:33 AM, folkert wrote:
> Hi,
>
> I'm having a bit of trouble to get a soundmodem working.
> The problem is that the radio only transmits silence. So PTT works.
> I tried with and without a line-level-to-mic-level resistor network, I
> also tried that line-level-thingy together with a capacitor to solve the
> problem of the couple-of-volts on the mic-pins of the radio, but always
> silence. I verified that audio comes out of the soundcard and also out
> of the resistors (something like:
> http://www.hometheatershack.com/forums/attachments/spl-meters-mics-calibration-sound-cards/11906d1232997532-ecm8000-microphone-measuring-techniques-usage-discussion-line-mic-pad.jpg
> ).
> Any ideas?
>
>
> Folkert van Heusden
>