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Post subject: Silverface Bassman-bass channel conversion
Posted: Thu Jun 16, 2011 1:36 pm
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I recently converted a Silverface Bassman, AC568 circuit, to AA864 specs. I was thinking about converting the bass channel to a 5F6 circuit and so I did a drawing of my idea. I want to emphasize that this is only the pre-amp part of the circuit. I have not drawn up the rest of the conversion yet. I just want some opinions on whether this would work or not. Or if someone has done this yet how did it work out. Here is a link to the schematic:
http://s169.photobucket.com/albums/u217 ... onversion/

Thanks everyone


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Post subject: Re: Silverface Bassman-bass channel conversion
Posted: Thu Jun 16, 2011 2:00 pm
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I'm prolly missing something, but it seems that you are placing the cathode of the second 12AX7 onto the volume control (via a 250pfd and 0.022mfd cap)? I keep timing out. Hopefully this will post.

Image



Bassman 5F6 circuit and layout:

http://www.ampwares.com/schematics/bassman_5f6.pdf


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Post subject: Re: Silverface Bassman-bass channel conversion
Posted: Thu Jun 16, 2011 2:10 pm
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+1

Also, my concern is the lack of a NFL (with the requisite presence control) to voice the channel as a true 5F6-A circuit. It might still sound okay though.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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