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Heathkit GR64 shortwave radio
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09-02-2012, 10:41 PM
bob91343
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Join Date: Nov 2010
Posts: 745
You can use a transformer with a 6.3V winding and either retrofit different tubes (I don't recall the setup) or add a little 6.3V transformer to raise the voltage. There are many ways to do the job.
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