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Hoffman Amps Forum image Author Topic: Dialing in a 5e5a build  (Read 1600 times)

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Offline etneccas

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Dialing in a 5e5a build
« on: August 24, 2019, 08:44:48 am »
What are some of the tweaks or things I should check to dial in a 5e5a build? I want to make the low end tight and punchy and just overall more responsive?
« Last Edit: August 24, 2019, 10:19:23 am by sluckey »

Offline DummyLoad

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Re: Dialing in a 5e5a build
« Reply #1 on: August 24, 2019, 03:09:28 pm »
closed back speaker cabinet / different speaker(s).

reduce 100K NFB resistor value. experiment - 91K, 82K, 68K, etc.

swap 16uF main filters with 30-32uF filters.

do you know the inductance value and current rating of the choke used?

--pete

Offline etneccas

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Re: Dialing in a 5e5a build
« Reply #2 on: August 26, 2019, 07:14:59 am »
[quote author=DummyLoad

“do you know the inductance value and current rating of the choke used? “

--pete

Hammond 193h 5h@200ma
The build originally came with a Mojo 777
Which to come think of it sounded amazing
but I was advised that it was under sized and would burn up. So I could either change the location from being in series to the taps on the output transformer or put a bigger choke in
and I went with bigger choke and it totally changed the feel.....

 


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