[RTTY] Interface help

[Robert Chudek - K0RC]

Stuart,

There's several things that could have gone wrong. The keying transistor in 
the Rascal could have died, there could be a short in the cable going from 
the Rascal to the FSK jack on the PRO, or the input circuit to the PRO could 
have stopped working.

You can check the radio by shorting its FSK line to ground. This is what the 
Rascal is supposed to do. So if you short it manually and the radio doesn't 
shift tones, you have isolated the problem to the radio.

Next, you can check the connectors on the cable for a short or open.

Third, you can check the keying transistor in the Rascal (assuming that's 
how they key FSK) for an open or short.

73 de Bob - NU1AW/Ø in 2008 IARU 15m SSB (this weekend!)


> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 9 Jul 2008 10:33:49 -0400
> From: "Stuart Spatz" <slspatz at cox.net>
> Subject: [RTTY] Interface help
> To: <rtty at contesting.com>
> Message-ID: <000501c8e1d0$cd6059b0$0201a8c0 at Radio>
> Content-Type: text/plain; charset="us-ascii"
>
> I am having a problem and not sure how to troubleshoot it.
>
> I have a Buxcomm RASCLE interface from my computer using MMTTY to an ICOM
> 756 PRO in the RTTY mode.
>
> Everything was working fine and then just all of a sudden the radio put 
> out
> a steady tone.
>
> The computer shows that the correct data is being sent, the red LED on the
> interface unit is blinking, showing me that data is coming into the
> interface, but the radio only puts out one tone.
>
> Any ideas on how to trouble shoot the problem?
>
> Thanks in advance.
>
> Stu Spatz
> K4MIL/KG4SS
>
>
>
>
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> End of RTTY Digest, Vol 67, Issue 8
> ***********************************
>