Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Diverted on November 21, 2018, 11:58:07 am
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http://schematicheaven.net/fenderamps/deluxe_6g3_schem.pdf
Hi all, Happy Thanksgiving.
A few quick questions:
I'm thinking about building a single channel Fender 6G3 circuit, using 19w 6L6Gs instead of 6V6s. My question is regarding the tremolo: I have heard the type of tremolo used in the 6G3 doesn't respond as well to higher-wattage output stages. Am I going to have an issue building it with the 6G3 bias modulating tremolo, or should I use a different tremolo circuit?
Also, this is going on an old Altec Lansing chassis I bought (already stripped of transformers) on eBay. This chassis has all octal sockets so I plan to use 6SL7 for two out of the three octal tubes. I plan on using a 6SC7 for the phase inverter circuit as the original 6G3 cathodes are tied together, as they are internally on the 6SC7.
Any pitfalls you can see coming? I can build to a schematic, but don't know if I'm going to introduce any gain or other issues using 6SL7s early on.
Thanks and Happy Thanksgiving!
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I would look through some old Ampeg schematics. You'll find something much closer to your ideas.
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Thanks for the tip! Hadn't looked at those.
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Ampeg Jet J12 sounds really good. If I had 7591 tubes and an output transformer matched to them I'd do it stock. I'll probably do it with the 6L6gs I have with a nice potted Chicago output transformer. I also have some 6BG6s I've had laying around forever. Maybe I'll use those. It has a cage so I'm not worried about the top plate on them.
I may improve the tremolo section based on Sluckey's redrawn schematic for this amp. Tried it one time before and love it.
https://el34world.com/charts/Schematics/files/Ampeg/Ampeg_j12a_jet.pdf
Thanks!
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The tremolo will work much better with 7591s or 6V6s than it will with 6L6s.