Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Esquirefreak on February 24, 2023, 01:52:17 am
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One of my favourite builds (or at least the one I tend to use the most) is an amp based on the normal channel 6G6-B. There are a few differences between my amp and the real ones, such as GZ34 rectifier und so weiter.
I have a pine frame/empty cab that I'm re-tolexing and although I've already made a 2×12 baffle, I just got this idea to maybe make a 3×10 out of it. Because I happen to have 3 WGS Veteran 10s on the shelf.
The amp sports a Hammond 1750M (2/4/8 Ω secondary taps).
My question is;
If you were to wire 3 8Ω speakers ala Bandmaster for roughly 2.7Ω total, would you use the 4Ω tap or the 2Ω tap?
My guess is that either would be electrically ok, with minor effects on plate voltage and bias? Should I just go by ear and call it a day?
The NFB is connected to the 4Ω tap on the speaker impedance selector switch.
Regards from Sweden,
Max
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2 ohms tap
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My question is;
If you were to wire 3 8Ω speakers ala Bandmaster for roughly 2.7Ω total, would you use the 4Ω tap or the 2Ω tap?
I'd say try it each way, and stay with the one that sounds the best.
You're going to have "wrong load" with either choice, which mostly just reduces clean power output. And if you're only "a little wrong" in either direction, the consequences people fear won't happen anyway. So it's not worth stressing over.
Fender's 3x10 Bandmaster used the same output transformer as the 4Ω Super (https://www.thegearpage.net/board/index.php?threads/best-replacement-output-tranny-for-tweed-bandmaster.2185082/post-31206526) of the same era.