9100 convert to el34's from 5881

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vmaxvmax
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9100 convert to el34's from 5881

Post by vmaxvmax » Tue Mar 26, 2019 8:56 am

Hi,
I am new to this excellent forum.

I would like to convert on side of my 9100 power amp to run on el34's. That would give me the choice of using either 5881's or el34's.

I understand that the transformers are fine but that some resistor changes and a re-bias will be needed. I also plan to modify the tray so that the taller el34's will fit under the hood...

Has anybody here carried out this conversion and if so, what steps are needed? I do have the Marshall schematics so no problem referring to the schematic part numbers.

Kind wishes and many thanks in advance...

Kennetiversen
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Re: 9100 convert to el34's from 5881

Post by Kennetiversen » Tue Oct 20, 2020 5:49 pm

Hey!

I'm currently thinking of doing the same. Did you mod it?

Kennet
Kennet Iversen

vmaxvmax
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Re: 9100 convert to el34's from 5881

Post by vmaxvmax » Tue Oct 20, 2020 11:56 pm

:vh: No... I still plan to one day but other things took over. :?

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