Author Topic: red knob model t pulling tubes question  (Read 565 times)

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Offline tacklebox455

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red knob model t pulling tubes question
« on: January 07, 2012, 10:17:31 pm »
i'm not sure sure if i can do this but i would like to know if i can pull 2 of the tubes from my T to reduce the wattage? if so which ones would i pull 2 from the middle or 2 from the outside? i have done this with other amps , if anyone else has done this with there T let me know if this helped reduce the wattage any(volume)
1975 Sunn model T
2007Crate Blue voodoo BV 120(mercury magnetics upgraded)
Randall RT 503
Jet City JCA 22H
Creepy fingers harakiri superfuzz
Creepy fingers doomidrive
Earthbound Audio supercollider
Malekko Plus Ultra 213

Offline loudthud

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Re: red knob model t pulling tubes question
« Reply #1 on: January 07, 2012, 11:58:43 pm »
The tubes are paired side to side so you can remove the front two, the back two, the center two, or the outside two. Adjust your output impedance one tap lower than the speaker load ie use the 4 ohm tap for an 8 ohm cabinet.

Offline tacklebox455

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Re: red knob model t pulling tubes question
« Reply #2 on: January 08, 2012, 08:33:47 am »
thank ya very much i wasnt sure on this amp since the output tubes are set up kinda funny ..or at least to me,
btw i tried it this morning was hoping to drop the volume a little more than what it did but it worked out ok, guess its time i got a attenuator . 
1975 Sunn model T
2007Crate Blue voodoo BV 120(mercury magnetics upgraded)
Randall RT 503
Jet City JCA 22H
Creepy fingers harakiri superfuzz
Creepy fingers doomidrive
Earthbound Audio supercollider
Malekko Plus Ultra 213

Offline Isaac

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Re: red knob model t pulling tubes question
« Reply #3 on: January 12, 2012, 12:14:11 pm »
I've done this. It reduces the output power by half, but that's only 3 dB. It's not very noticeable.
Isaac