[WT-support] SSB voice keyer question?

[F6IFY]

Hi,  

 The best would be to have radio one on left channel and radio two on right
(or vice-versa), the soft might send the audio on corresponding stereo
channel. Of course you need a stereo sound card.
PTT is the most important for SO2R, even if the audio is on both microphone
input. For audio reception (and recording) or PTT the multi-keyer (or a
simple relay on parallel port) do the job.
I have made some test but not really used in SSB contest.
Advice about ground loop is very important. Take care also about the level
and impedance at the TX microphone input. Old ICOM radio need only 10mV and
Soundcard output can do 1V peak/peak. A simple 100:1 resistance divider
could be use in this case.

Regards
73 de Philippe - F6IFY

P.S.: Désolé d'écrire en (mauvais) anglais mais la Netiquette l'impose pour
une liste internationale.

> -----Original Message-----
> From: support-bounces at win-test.com 
> [mailto:support-bounces at win-test.com] On Behalf Of Olivier F5MZN
> Sent: Wednesday, September 22, 2004 7:50 AM
> To: support at win-test.com
> Subject: Re: [WT-support] SSB voice keyer question?
> 
> f8crh wrote:
> > Bonjour,
> >  
> > Je viens de tester sur un tx et sa charge 50ohms!! le voice 
> Keyer de 
> > win-test excité par une carte son. En monitoring ça à l'air QRO!
> > J'ai également poussé le vis à laisser branché ma pastille HC5 sur 
> > l'entrée micro du PC et à exciter via un transfo 
> d'isolement 600 ohms 
> > le tx par la sortie HP de ma carte son > Ça semble également QRO en 
> > monitoring!!
> 
> Do you mean that you always have the mic connected to the rig 
> through the sound card? Maybe not a good idea, as if you must 
> reboot your computer for any reason, you will not be able to 
> transmit untill reboot is finished.
> 
> To minimize the RF feedback problems and have the best sound 
> quality, the best way is to have a "phone" transformer IN and 
> OUT of the sound card and some relays to commut between 
> soundcard and real microphone. 
> Use a plastic box, or isolated connectors (ground must not be 
> common between soundcard and microphone).
> 
> Anyway I've no experience in SO2R using the soudcard as a 
> voicekeyer. I usually have an external MFJ one, connected to 
> the "main" radio. So that, the SO2R box only switch mic on 
> "radio 1" or "radio 2". First times that I operated SO2R, I 
> did even not have a switch for the microphone, the heil 
> soundset was connected to radio 1 and an hand-mic was 
> connected to radio 2. This solution is not very practical and 
> there is a disadvantage: one can sometimes transmit 
> accidentally on the two radios at once without realizing it, 
> however it is a rules violation!
> 
> 73,
> --
> Olivier / f5mzn
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