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 Post subject: Hammarlund 170A power transformer
PostPosted: Jun Tue 04, 2019 2:30 am 
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Joined: Jan Thu 10, 2019 5:39 pm
Posts: 120
Location: Rockbridge Ohio 43149
I have a Hammarlund 170A on the bench with a DOA power transformer. How can I find the specs on the transformer, the parts list tells me nothing. TYIA


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 Post subject: Re: Hammarlund 170A power transformer
PostPosted: Jun Tue 04, 2019 3:18 am 
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Joined: Jul Mon 26, 2010 8:30 pm
Posts: 26552
Location: Annapolis, MD
Well, the easy part is adding up all the filament loads.....:)

I found one voltage on the schematic---the "high B+" going to the output tube. 255VDC--means the HV secondary is in the neighborhood of 280 - 300 peak, or ~ 200 - 215 rms. (per side--ie from the CT to each end)

To pin things down, we'll need all the tube currents.

Much as I love reading tube data sheets, I'd probably just pull the thing apart and count the turns and measure the wire gauges

Wild Guess:
220-0-220 at 300mA DC
6.3VAC at 8 amps

But--don't guess on this one........

_________________
-Mark
"Measure voltage, but THINK current." --anon.


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