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Hoffman Amps Forum image Author Topic: Harmony H194  (Read 2289 times)

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Offline clyde

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Harmony H194
« on: January 25, 2024, 11:14:49 pm »
Totally trashed, chassis only, power cord cut, no tubes, 2 6J5's into a 6V6.  The Plan:  6SJ7 and a 6J5 into that 6V6 to a field coil speaker, replacing the toy OPT.  The question:  Which comes first, the chi.., oops the 6SJ7 or the 6J5?  This one is contact biased at the input.  The amp can't be fired up at all to see how it does or doesn't work.  What think ye?  BTW, the schematic doesn't exist online but I'd be happy to fwd my hand-drawn one to someone who could put it into the proper format for the schematics library.  Thank you.

Offline sluckey

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Re: Harmony H194
« Reply #1 on: January 26, 2024, 12:28:41 am »

Quote
the schematic doesn't exist online but I'd be happy to fwd my hand-drawn one
Post it and we'll take a look.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline isaac_teller

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Offline dwinstonwood

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Re: Harmony H194
« Reply #3 on: January 26, 2024, 04:01:43 am »
I skewed, cropped, and grayscaled it. It's a bit easier to read...

Offline clyde

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Re: Harmony H194
« Reply #4 on: January 26, 2024, 10:35:31 am »
Schematic: 

 


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