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Hoffman Amps Forum image Author Topic: 6G3 Deluxe cap job  (Read 1868 times)

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Offline Mars-Hall

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6G3 Deluxe cap job
« on: March 21, 2020, 08:54:29 pm »
Do most replace the pan caps with original values on these?  Amp still has original orange Mallory caps 1 x 8uf and 3 x 16uf.  Was wondering if people were substituting any values, especially the 8uf?  Of these I've played, I really like the gain structure, not looking for more clean headroom.
“I love being alive and I will be the best man I possibly can. I will take love wherever I find it and offer it to everyone who will take it. Seek knowledge from those wiser and teach those who wish to learn from me.”  Duane Allman

Offline sluckey

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Re: 6G3 Deluxe cap job
« Reply #1 on: March 21, 2020, 09:55:49 pm »
8 and 16 are still available. I would have no problem with using 10 and 22.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline Mars-Hall

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Re: 6G3 Deluxe cap job
« Reply #2 on: March 21, 2020, 10:03:02 pm »
8 and 16 are still available. I would have no problem with using 10 and 22.


What would be the effect of 10uf and 16uf or is the larger step change preferred?
“I love being alive and I will be the best man I possibly can. I will take love wherever I find it and offer it to everyone who will take it. Seek knowledge from those wiser and teach those who wish to learn from me.”  Duane Allman

Offline PRR

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Re: 6G3 Deluxe cap job
« Reply #3 on: March 22, 2020, 01:19:58 am »
Ask rather what "8uFd" was. On older amps it could be -50%/+100%, or 4uFd to 16uFd. While that may be a CYA spec, certainly 6ufd or 12uFd would all be good.

Modern caps run closer to marked size. (Unlike modern shoes...) A 6.8uFd 20% cap may be fine to control B+ buzz. I'm sure 10 or even 12uFd could be no "stiffer" than some old "8uFd" caps. (I'm not sure "stiff" has real meaning in preamps, but somebody will say he hears it.)

 


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