Choosing a PT

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xtian
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Choosing a PT

Post by xtian »

Getting ready for my first D style build. Trying to decide on a PT for a quad of 6L6. Should I be aiming for 400-450v on the plates?

My choices include a Bugera PT with 380-0 (no CT) unloaded. With full-wave bridge rectifier, and subtracting 10% for load, I'll get around 480v on the plates. Correct?

I have a monster Fender Tone Master PT with 175-0-175 HT. With full-wave, I think I'll see 490ish?

Finally, I have a Hammond 272JX, 300-0-300, making...wait, 840v?!? OK, all I've figured out is I don't know how to do this. I thought Hammond's doc would help: http://www.hammondmfg.com/pdf/5c007.pdf
I build and repair tube amps. http://amps.monkeymatic.com
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ToneMerc
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Location: East Coast

Re: Choosing a PT

Post by ToneMerc »

xtian wrote:Getting ready for my first D style build. Trying to decide on a PT for a quad of 6L6. Should I be aiming for 400-450v on the plates?

My choices include a Bugera PT with 380-0 (no CT) unloaded. With full-wave bridge rectifier, and subtracting 10% for load, I'll get around 480v on the plates. Correct?

I have a monster Fender Tone Master PT with 175-0-175 HT. With full-wave, I think I'll see 490ish?

Finally, I have a Hammond 272JX, 300-0-300, making...wait, 840v?!? OK, all I've figured out is I don't know how to do this. I thought Hammond's doc would help: http://www.hammondmfg.com/pdf/5c007.pdf
Why reinvent the wheel here, stare and compare at what was used in the actual amps mostly ....a Twin Reverb PT. If you need a standup mount, find one with similar specs as the Twin Reverb.

TM
groovtubin
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Joined: Tue Feb 07, 2006 4:52 am

Re: Choosing a PT

Post by groovtubin »

ToneMerc wrote:
xtian wrote:Getting ready for my first D style build. Trying to decide on a PT for a quad of 6L6. Should I be aiming for 400-450v on the plates?

My choices include a Bugera PT with 380-0 (no CT) unloaded. With full-wave bridge rectifier, and subtracting 10% for load, I'll get around 480v on the plates. Correct?

I have a monster Fender Tone Master PT with 175-0-175 HT. With full-wave, I think I'll see 490ish?

Finally, I have a Hammond 272JX, 300-0-300, making...wait, 840v?!? OK, all I've figured out is I don't know how to do this. I thought Hammond's doc would help: http://www.hammondmfg.com/pdf/5c007.pdf
Why reinvent the wheel here, stare and compare at what was used in the actual amps mostly ....a Twin Reverb PT. If you need a standup mount, find one with similar specs as the Twin Reverb.

TM
Man i LOVE your thought process.....! Have fun mike!

jim
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ToneMerc
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Re: Choosing a PT

Post by ToneMerc »

groovtubin wrote:
ToneMerc wrote:
xtian wrote:Getting ready for my first D style build. Trying to decide on a PT for a quad of 6L6. Should I be aiming for 400-450v on the plates?

My choices include a Bugera PT with 380-0 (no CT) unloaded. With full-wave bridge rectifier, and subtracting 10% for load, I'll get around 480v on the plates. Correct?

I have a monster Fender Tone Master PT with 175-0-175 HT. With full-wave, I think I'll see 490ish?

Finally, I have a Hammond 272JX, 300-0-300, making...wait, 840v?!? OK, all I've figured out is I don't know how to do this. I thought Hammond's doc would help: http://www.hammondmfg.com/pdf/5c007.pdf
Why reinvent the wheel here, stare and compare at what was used in the actual amps mostly ....a Twin Reverb PT. If you need a standup mount, find one with similar specs as the Twin Reverb.

TM
Man i LOVE your thought process.....! Have fun mike!

jim
Jim when it comes to Dumble, I believe in the fine art of stare and compare. I've come full circle with him; would like to have another conversation with him, only this time calling him an evil genius :D

Mike
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dreric
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Re: Choosing a PT

Post by dreric »

second what Mike said.

It sounds like you have those PT on hand and I understand the desire to use them. Getting the amp to sound right is all about tweaking the voltages, best to start with a PT that is known to work..............
Eric
1949 Zenith, Zenith Toggle Recoil, Zenith 55 & 440
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