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Author Topic: Sunn 1200s Tubes  (Read 3133 times)

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Offline ChrisCloutier

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Sunn 1200s Tubes
« on: August 09, 2005, 08:17:07 am »
Anybody has a 120s guitar head with reverb & tremolo (4x 6550) and would be kind enough to send me a tube diagram (which tube models go where)?

I know where the 6550 quartet go, the 12AX7 (1 or 2?) and the GZ34... but what about the others?

Thanks!

Chris Cloutier.
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Offline Isaac

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Sunn 1200s Tubes
« Reply #1 on: August 10, 2005, 08:03:37 am »
Two 12AX7s at the front of the amp, 6AN8 in the middle, just forward and in the middle of the 6550s. GZ34 at the rear, to the left when looking from the rear of the amp.
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Offline ChrisCloutier

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Sunn 1200s Tubes
« Reply #2 on: August 10, 2005, 03:10:17 pm »
Thanks Isaac...

I thought there was a 12AT7 or 12AU7 also used as the reverb driver?

Any ideas on that?

Thanks,

......................cc.
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Offline Isaac

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Sunn 1200s Tubes
« Reply #3 on: August 10, 2005, 05:26:58 pm »
Yes, that's true, although a 12AX7 would work as well, I think. Looking from the rear, again, the tube farthest to the right is the 12AX7. The one just to the left of it is the 12AU7.
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Offline ChrisCloutier

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Sunn 1200s Tubes
« Reply #4 on: August 12, 2005, 08:25:02 am »
My head is missing the reverb tank (I believe) also... would you know which accutronics model I should replace it with?  Probably a 2 springs long delay one, but which one?

....................cc.
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Offline Isaac

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« Reply #5 on: August 12, 2005, 02:47:01 pm »
No, sorry. I have no information on that.
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Offline Isaac

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Sunn 1200s Tubes
« Reply #6 on: August 15, 2005, 09:43:11 am »
I have one reverb tank that says

O. C. ELECTRONICS
MILTON, WIS. 53563
MADE IN USA

It has two numbers stamped on it.
29-0011
457

I dunno if that will help at all.
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