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Author Topic: Swan 410 External VFO  (Read 1088 times)
AC0FA
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Posts: 298




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« on: June 29, 2007, 02:18:01 PM »

Hi,
I have a bare bones 1964 Swan 350 with the solid white faced dial. It uses a diferent oscillator frequency from the 350c model.

The frequency is prety stable after it warms up for an hour.  

Will a 410 external VFO keep my Swan 350 from being so drify? Will it stabilize the frequency right away?

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KE3WD
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Posts: 5689




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« Reply #1 on: June 29, 2007, 07:15:07 PM »

Swans drift and we all used to turn on at least a half hour before sked.  He never really solved that until the all solid state Swan with the PTO in it.  But those don't have the class, nor the power, nor the audio.  

External VFO might not drift as much because it is a temperature deal.  Having the VFO right there in the rig with the big hot sweep tubes is the real problem.  

Many Swan operators hang pancake fans on the side where the PA is, it helps the drift problem somewhat.  

Two 12VDC fans hooked in parallel will spin at half speed and aren't so noisy in the shack.  

And to think we actually used to manage to run 'em mobile...

Plenty of info on Swan drift on the web, just google.  


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