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City: Winter Haven, FL
The 624 uses a single 19 tube in a push/pull configuration. The Radioremembered chart only shows the load resistance of 10K when the 19 is used in a single ended application. Would a push/pull transformer such as one for 6F6's also with 10K, work?
Posts: 7,283
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City: Roslyn Pa
Yup your looking for 10K plate to plate load to match a 4ohm vc. The wattage is about 2.5wts. Your chart should say 5k per plate... It's rather unconventional to configure a 19 as a se amp and use the second triode for another application as it's designed to be use as a power output tube.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
(This post was last modified: 06-13-2021, 08:16 AM by
Radioroslyn.)
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Thanks Terry. Working now.
Pat
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City: Hay Lakes, Alberta,Canada
Dominion Electrohome here in Canada used the 19 in that configuration quite a bit in their higher end early 30's battery sets. I find it odd as well, but it seems to have worked ok. And knowing manufacturers in the depression era, dollars and cents came into play...