Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: FREYES_7 on October 20, 2025, 10:30:16 am
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Hello all
Built another 5F1 from scratch, sounds splurry when saturated,
For my first 5F1 I got this issue, but splurrier, solved it by tiding cables from preamp and OT
Even though my soldering is very lacking, I think the preamp socket cables are tidy, I did a thing with the OT and output jacks tho, which I suspect must be the issue.
Added 470ohm @1W screen resistors and 1.5k grid stopper to power tube 6V6, just in case,
Haven't tested again because I noticed the normal jack input was shorted and have to get a replacement, tempted to get rid of normal input,
Any insight will be appreciated
https://imgur.com/gallery/jxQl4vL
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Sounds like the speaker is buzzy. Have you tested another speaker with it?
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Sounds like the speaker is buzzy. Have you tested another speaker with it?
Thanks, will check!
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Sounds like the speaker is buzzy. Have you tested another speaker with it?
Tested speakers and they are fine, looks like it's the amp
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did you test the amp with another speaker, one in a cab so it's solid???
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did you test the amp with another speaker, one in a cab so it's solid???
it's a 5F1 with 4ohm and 8ohm outputs,
the 4ohm celestion eight15 is brand new, it's not in a cab, but I have another 5F1 that's working fine and the speaker did not falter when connected to it
the 8ohm celestion greenback, was bought used, it's not in a cab, but when connected to a 5E3 DIY kit from mojotone, it works fine,
I think I will route the OT cables in another way, they might be too close to the preamp section