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Hoffman Amps Forum image Author Topic: Seeking BF Deluxe Reverb Pre-build Advice  (Read 8867 times)

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Offline sluckey

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Re: Seeking BF Deluxe Reverb Pre-build Advice
« Reply #50 on: January 02, 2022, 09:28:42 pm »
All those 1/2 watt carbon comp resistors are a huge contributor to shhh.

Divide and conquer. Pull V4 Does the shhh go away?
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline gfarina55

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Re: Seeking BF Deluxe Reverb Pre-build Advice
« Reply #51 on: January 02, 2022, 09:42:57 pm »
...and, it's finished! Huge, full, shimmery sound through my 5e3's Celestion blue, and the reverb and trem both work great! The loud "shhhh" is the reverb when the tank isn't hooked up and the reverb control was maxed out. (I don't mind the mild "shhh" from CC resistors. My fave amps have them.) The reverb seems a bit noisy and the trem clicks a bit, but no more than any other DR I've owned. After the biasing, the voltages are about 5-10% lower than those posted above.

So now I have to order that coupling cap, and I'm going to redo the power tube sockets that are a mess. Waiting for a speaker from Weber and I'm hoping to order a Mather cab when I get some extra $$.

I can't say how much I appreciate all the help, and if it wasn't for you guys (especially Willabe and Slucky) these amps would be half-finished gathering dust in the corner. I now have a fantastic sounding 5E3 ("Alpha"), a 5F6A Tweed Bassman ("Delta"), and this DR ("Omicron") thanks to this forum. That said, I think this is gonna be it for me. Tomorrow I go back to being a musician and I'll leave this stuff for the experts.
« Last Edit: January 02, 2022, 10:30:15 pm by gfarina55 »

Offline glass54

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Re: Seeking BF Deluxe Reverb Pre-build Advice
« Reply #52 on: January 02, 2022, 10:17:16 pm »
Well done gf  :thumbsup: Very neat job.
....But why stop building now that you have developed some very good expertise  :occasion14:
Kind regards
Mirek
"To measure is to know"

 


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