Octal substitutes for 6SC7?

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Octal substitutes for 6SC7?

Postby Cygnus X1 » Wed Mar 25, 2009 6:09 pm

I'm playing with a Fender Tweed circuit-a 5C3.
Not vintage, it's a project homebrew.

I was wondering what other octal tubes might be subbed for the 6SC7 preamp tubes to get a bit more headroom?
For those not familiar, Fender switched to a 12AY7/12AX7 later in this 2x6V6 powered amp.

Preferably with the same pinout.
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6SC7 sub

Postby tubefever » Wed Mar 25, 2009 6:19 pm

6SL7 is close, pinout is different
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Postby Gingertube » Wed Mar 25, 2009 9:38 pm

I am half way through the build of a 2 channel (clean and lead) amp using 6SL7 in the preamp and 6SL7 concertina splitter driving a pair of 6V6 output tubes right now.

Metal bashing is complete, all hardware (pots, tube sockets, transformers etc) are mounted, heater wiring is done and the power amp section is 95% wired.

Will keep you posted (if you'll forgive the pun).

Cheers,
Ian
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Postby jimmyjazz » Wed Mar 25, 2009 10:56 pm

I built a 5c8 clone with a 6sl7 front end, a 6sc7 pi, into vintage tung sol 5881's.

I think it is pretty nice.

It is cathode bias. if you want more gain, try fixed bias.

I really like the 6sl7/6sc7 tubes for drivers.
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Postby fett » Sat Jul 18, 2009 8:20 pm

Hi. Cyg. It's me. fett. How does one introduce oneself here?
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Postby Geek » Sun Jul 19, 2009 1:11 am

fett wrote:Hi. Cyg. It's me. fett. How does one introduce oneself here?


You just did! (lol)

Welcome!
-= Gregg =-
Fine wine comes in glass bottles, not plastic sacks. Therefore the finer electrons are also found in glass bottles.
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Postby Cygnus X1 » Sun Jul 19, 2009 5:17 am

fett wrote:Hi. Cyg. It's me. fett. How does one introduce oneself here?


Well folks, meet the sponsor of this project!
;)

fett has been a great help to me and is the reason I went into building amps.
There are a few here in the cave that are waiting for a plan.
The Masco is first in line.

Still thinking of a JTM45 for it.
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Postby Cygnus X1 » Sun Jul 19, 2009 5:23 am

Here is the result of that 5C3.
It was a Grommes 10 Watt that had seen its better days in the gut parts. The box and transformers were good enough to salvage.
I gutted everything else and shoehorned the Tweed Deluxe circuit into it.
It ended up sounding great (in my opinion).

Image
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