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Hoffman Amps Forum image Author Topic: Red Headded Stepchild  (Read 4873 times)

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Offline Frankenamp

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Red Headded Stepchild
« on: November 30, 2008, 03:29:38 am »
Happy Turkeyday Gentlemen:

I have put most of the tweaked schematic into a layout (I did make a few shortcuts due to space constraints). I would be most appreciative if those of you with a far greater understanding would take a look and see if I have made any egregious errors (or minor screw-ups).  Things will appear a bit squeezed because I attempted to compress a 17" board down into a 11" board. I couldn't make SCH do what I wanted, so I found a layout that I could edit to some semblence of what I wanted- Gratitude to Mr. Tubenit. Your Blues Special layout was one schematic layout that my version of SCH would edit without throwing a conniption, thank you.
This problem calls for a bigger hammer!

Offline tubenit

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Re: Red Headded Stepchild
« Reply #1 on: November 30, 2008, 06:17:45 am »
Man, I am impressed with your layout!!  Looks superb!  First glance, I did not see any errors at all.

Can you include a schematic with the layout, please?    THANKS for sharing your work, it is appreciated.

Best regards, Tubenit

Offline Frankenamp

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Re: Red Headded Stepchild
« Reply #2 on: November 30, 2008, 05:46:08 pm »
Thank you for your kind reply. I am only following your excellent example. (Like a famous scientist once said: "the only reason I can see so far is that I am standing on the shoulders of giants".) I have taken the liberty of editing a schematic to reflect the current layout so far Some of the voltages are guesstimates at this time. If I were to throw a fuse in the B+ supply (I'm paranoid about screwing up something) would 250V .5A be a reasonable value? The WIP schematic is attached. Again, Thanks!
This problem calls for a bigger hammer!

Offline tubenit

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Re: Red Headded Stepchild
« Reply #3 on: December 01, 2008, 07:37:39 am »
Thanks for adding the schematic!  I value your contribution to the forum and new ideas. I am honestly not sure what voltage for the fuse??  I have just bought what Hoffman sells.!

Doug does use a .5A fuse in the B+ of his Plexi 50w schematic.

With respect, Tubenit

Offline LooseChange

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Re: Red Headded Stepchild
« Reply #4 on: December 01, 2008, 07:53:46 am »
Tone stack bypass...
You could get the same results by lifting the midrange resistor from ground.  You would only need a simple spst switvh too.
Call me Dan
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