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TRANSMITTING WITH AUDIO CARD
VARIOUS CIRCUITES TO USE PTT AND AUDIO

>>>>> INDEX <<<<<
FLEXNET AGW PACKET ENGINE TROUBLES CIRCUIT FOR RX AND TX

 


FOR RECEIVING

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;

cable for receiving packet with audio card

 


FOR TRANSMITTING

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.


 

PTT CIRCUIT

To activate PTT you can use:

SERIAL PORT:

serial port PTT circuit

 

 

PARALLEL PORT:

parallel port PTT circuit

 

GAME PORT:

midi port PTT circuit

 

 

VOX:

Vox PTT circuit

 

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.

SEE TROUBLES PAGE

73 de iz7ath, Talino