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Old 17th Oct 2020, 6:43 am   #23
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 16,398
Default Re: Hallicrafters SX-25 Rebuild: New Mains Transformer Questions.

With a 5v directly heated filament taking 2 amps, if you were less worried about originality than the cost of the rectifier, a socket swap could allow you more choice. Guitarists have been keeping rectifier prices high, but I'm not sure they've noticed the 5R4 yet. Overkill, but there's the heater current available. Hmm, second thoughts, it looks like the toob rolling fraternity have noticed them, I see listings with emphasis on the colour of the base, the colour of the anodes and the shapes of getters. Oh dear!

It depends on what you have available, but a swap to an octal socket may expand your opportunities.

David
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