WITH AUDIO CARD
VARIOUS CIRCUITES TO USE PTT AND AUDIO
Reception with audio card is very easy;
make a shielded cable (as short as possible) to connect Audio Out in your RTX to MIC IN (LINE IN for agwpe, LINE ON or MIC IN for flexnet) in your Audio Card; usually audio card uses a stereo jack while RTX uses a mono one;
Transmitting Packet with audio card is easy; you need only two thing:
If you are running under Windows, deactive the hardware you use for PTT (COM, LPT, GAME PORT) in the CONTROL PANEL for the FLEXNET configuration; make that clicking on "DEACTIVE IN THIS HARDWARE PROFILE" or "DELETE FRM THIS PROFILE"; make that if you are using flexnet; if you use agw packet engine that's not necessary.
To activate PTT you can use:
All these circuits can be used with flexnet; I'm not sure about the use of midi port with agw packet engine (but you can use serial, parallel and vox).
AUDIO OUT CIRCUIT
The simplest way is to connect the Output of
the audio card (LINE OUT o SPKR) to the MIC IN line in your
RTX directly; simplest but not the best;
Take a lot of care in shielding cables, don't keep them near Monitor, AC lines, RF cables; Ground is very useful; connect together cases of all device (RTX, PC, Power supply.);
Very useful is a transformer-separator; also optoisolator interface are welcome.
Read various .DOC file for more info and visit the HOMEPAGE of the various Software you use.
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73 de iz7ath, Talino