htx 212 for packet with soundcard - Elmers Forum at eHam.net

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eHam.net Forum : Elmers : htx 212 for packet with soundcard

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htx 212 for packet with soundcard	Reply
by KP2BH on February 3, 2004	Mail this to a friend!
hello: i have radio shack htx (no instruction book)and i would like to use it in packet vhf with my soundcard (creative sound blaster live).with no experience with soundcards i would like to know if anyone know the combination of how to connect from the radio to the sound card.the software i going to use is mixw. any help is welcome. thanks de....kp2bh jimmy

RE: htx 212 for packet with soundcard	Reply
by K0RFD on February 3, 2004	Mail this to a friend!
You can build your own interface. Basically the idea is to isolate the computer ground from the radio ground. You do this in the audio lines by using little transformers, in the circuit that keys the push-to-talk with the computer's serial port by using an optoisolator like a 4N28 (not at all critical. You'll probably use a freeware program called AGWPE (AGW Packet Engine) to make the sound card emulate a TNC. Not sure if MixW needs the AGWPE engine or whether it has its own, but AGWPE is pretty standard even for 3rd party packet software. The whole thing should cost you less than 20 bucks. There is VERY complete information (about 140 pages of it) at: http://www.qsl.net/soundcardpacket/ and pinouts for about every radio imaginable at: http://www.packetradio.com/ They also have all the parts you need. So do a lot of other places. When you graduate up to HF, you can use the same interface to run PSK31. Probably just need a different cable to the mic input of the radio. MixW will do PSK as well.

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