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RE: [wsjtgroup] FT-950 and signalink [1 Attachment]

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  • Mirel Cardoso
    That interface is to interconnect the computer with the transceiver. Nothing to do with the sound card. VK2BOD ... From: Danny Pease Date: 19/05/2012 11:52:24
    Message 1 of 1 , May 18, 2012
      That interface is to interconnect the computer with the transceiver.
      Nothing to do with the sound card.
      -------Original Message-------
      Date: 19/05/2012 11:52:24
      Subject: RE: [wsjtgroup] FT-950 and signalink [1 Attachment]

      The SignalLink does not need a sound card interface, it is a sound card and also should key the transmitter, if all is working properly. Where are you trying to key the radio, mic jack in front or data port on back?


      I can’t say about the microphone keying, but when I used the data jack on the back, a sound card interface I used would not pull the keyline low enough to key the radio, I wonder if that is possible with your SignalLink?


      The two FT950’s I have worked with both needed to go lower than .7 VDC on the data jack key input to key the radio, just going down to .7 was not enough. In this case, the sound card interface we had was using an optoisolator that was a Darlington pair configuration and would only go down to .7 volts. We replaced the optoisolator with a different device that used a single stage transistor in the optoisolator, it pulled the keyline down to about .4 VDC and all was well.





      From: wsjtgroup@yahoogroups.com [mailto:wsjtgroup@yahoogroups.com] On Behalf Of Mirel Cardoso
      Sent: Friday, May 18, 2012 7:46 PM
      To: wsjtgroup@yahoogroups.com
      Subject: [wsjtgroup] FT-950 and signalink [1 Attachment]



      [Attachment(s) from Mirel Cardoso included below]







      Here is the circuit diagram of an interface very easy to build.


      73 de Mirel







      -------Original Message-------



      Date: 18/05/2012 06:47:47

      To: j

      Cc: w

      Subject: Re: [wsjtgroup] FT-950 and signalink



      I use an FT-950 with WSJT no problem.  I have it hooked directly to the computer.  As I recall I put an NPN transistor and a resistor in the DB-9 serial connector to key the PTT.  It has been a while but if you need more information I can dig into it and see exactly what I did.




      On Thu, May 17, 2012 at 12:29 PM, W9RPM <john@...> wrote:


      HI, I bought a Ft950 to use just for WSJT modes. I am not getting my
      Signalink to key the radio. Everything seems to be set right. Anyone
      using one? Thanks, John

      EMAIL: john@...
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