S1 104 EL34: Tube recommendations and placement.

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JimiMack77
Posts: 1
Joined: Tue Feb 23, 2021 1:36 am

Tue Feb 23, 2021 1:43 am

Hello everyone!

I have an S1 with EL34's in it.

I'd like to try using a 12AU7 instead of AX7 in the preamp to help soften the preamp gain, since I run my master volume at 7 and really work the power tubes. (Thank the lord for attenuators!)

Only problem is, I can't find the tube layout schematic for the amp anywhere. Any suggestions or useless info you might be able to give me?
Furthermore, every replacement set of tubes I see only shows 4 preamp tubes (3x12AX7's, and 1x12AU7's) But my amp has 5 preamp tubes.
I'd really like a schematic, or explanation of what the tube layout is.

Last but not least, anyone have any recommendations for preamp tubes?
i removed the suggested EL34B's, hated them! Sounded/felt too much like 6L6's, which is NOT what I wanted from an EL34 based amp.

Thanks in advance for any info anyone can give me!

MetallicaFAN
Posts: 6
Joined: Fri Feb 19, 2021 11:26 am

Wed Feb 24, 2021 9:16 pm

Hi
I have the same amp but 6L6l
Regarding to schematic of the amp I have some. I was also looking for it and I found some people they sent me it.
If you want I can send you but I need email adress. If you want...

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