[AMRadio] TS430 as VFO on a KNIGHT T60


Jim Candela jcandela at prodigy.net
Mon Oct 16 09:49:00 EDT 2006


Jack,

   You bring up a good point. I don't know if the TS-430 has an auxiliary audio input or not; usually for a phone patch. If it does, then do your audio remotely with whatever Mic you want, compressor, equalizer, etc. and pipe it into the remote audio jack. Then tee off that input to drive the 'X' axis of your scope. Keep in mind that this approach will only work if there is minimal phase shift over the audio range (100-4000hz) between the remote input and the balanced modulator. If the TS-430 does not have a remote audio input, then  surgery is required to tap into the audio driving the balanced modulator. Once done you can inject high level audio from an external source as well as sample the audio for the scope.

Jim
JKO



----- Original Message ----
From: Jack Schmidling <jack at schmidling.com>
To: Jim Candela <jcandela at prodigy.net>; Discussion of AM Radio in the Amateur Service <amradio at mailman.qth.net>
Sent: Sunday, October 15, 2006 11:03:06 PM
Subject: Re: [AMRadio] TS430 as VFO on a KNIGHT T60

Jim Candela wrote:

> I am going to state here as my opinion that
> with linear AM you should monitor the RF output with a scope, and use
> the Trapezoid pattern when optimizing the linear controls, drive
> level, and audio level.

I have one set up but can't figure out a convenient way to get at an 
audio sig for the x axis from the TS430.

js



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