Pentode AB1 or AB2? - Page 9

bear · 7th January 2005, 11:51 PM

Fyi, and fwiw, the particular model I worked on had quite adequate output transformers which did work nicely in fact.

The HF stability I didn't find to be a big problem, the DC bias shift is what killed the tubes... glooooowwww, phfttttt! If there was an HF stability problem on this model, I didn't catch it... heh.

The B+ was less outrageous than that found on a certain California amplifier maker's gear (last letter in the name is "L").

And, at least this one didn't have the screens run into oblivion... I had to check with JC on that amp just to check my sanity because I couldn't believe what I was seeing (popping frying screens at full output level) to be sure that the B+ and screen voltages were not sane. They weren't.

Anyhow, if the French amp's drive circuit was properly set up it actually would have been a nice amp... excellent chrome, not much gold on that model

_-_-bear

The ironic part of the "L" amp was that owner had to have me change it back to stock so he could sell it!

noisenyc · 8th January 2005, 12:22 PM

ha!

lookee here, if it ain't randy and jc talking guitar amps!

every time you guys open your mouths i learn something

word to the hardware hackers...thanks

bear · 18th January 2005, 05:28 PM

Quote:

Originally posted by noisenyc
ha!

lookee here, if it ain't randy and jc talking guitar amps!

every time you guys open your mouths i learn something

word to the hardware hackers...thanks

JC's got it totally covered!

I'm just part of the cheering section!

Word to the wise - Blackie is da man - makes some super fine tube gear and guitar amps... check out his site!

_-_-bear

noisenyc · 18th January 2005, 06:05 PM

Quote:

Originally posted by bear

JC's got it totally covered!

I'm just part of the cheering section!

Word to the wise - Blackie is da man - makes some super fine tube gear and guitar amps... check out his site!

_-_-bear

haha dude check out february Playboy mag...besides the amazing jerry lee lewis article (worth the cover price x 4) they did a profile on moi

haha krazy!

bear · 22nd January 2005, 10:29 PM

Whoa! Look out!!

Are they shrink wrapping them on the newstands these days?
Hmmm... don't expect the public library will have it...

_-_-bear

PS... JC, where's the rest of the Fender lowdown stuff...?

noisenyc · 22nd January 2005, 10:42 PM

Quote:

Originally posted by bear
Whoa! Look out!!

Are they shrink wrapping them on the newstands these days?
Hmmm... don't expect the public library will have it...

_-_-bear

PS... JC, where's the rest of the Fender lowdown stuff...?

hehe you cheepskate!

here's a link

http://www.tubesville.com/playboy.htm

7th January 2005, 11:51 PM	#81
bear diyAudio Member Join Date: Apr 2002 Location: New York State USA	Fyi, and fwiw, the particular model I worked on had quite adequate output transformers which did work nicely in fact. The HF stability I didn't find to be a big problem, the DC bias shift is what killed the tubes... glooooowwww, phfttttt! If there was an HF stability problem on this model, I didn't catch it... heh. The B+ was less outrageous than that found on a certain California amplifier maker's gear (last letter in the name is "L"). And, at least this one didn't have the screens run into oblivion... I had to check with JC on that amp just to check my sanity because I couldn't believe what I was seeing (popping frying screens at full output level) to be sure that the B+ and screen voltages were not sane. They weren't. Anyhow, if the French amp's drive circuit was properly set up it actually would have been a nice amp... excellent chrome, not much gold on that model _-_-bear The ironic part of the "L" amp was that owner had to have me change it back to stock so he could sell it! __________________ _-_-bear http://www.bearlabs.com ...ur feeback please - like/dislike my what I have written? PM/email tnx. --

8th January 2005, 12:22 PM	#82
noisenyc diyAudio Member Join Date: Dec 2004 Location: los angeles	ha! lookee here, if it ain't randy and jc talking guitar amps! every time you guys open your mouths i learn something word to the hardware hackers...thanks __________________ -blackie.

22nd January 2005, 10:29 PM	#85
bear diyAudio Member Join Date: Apr 2002 Location: New York State USA	Whoa! Look out!! Are they shrink wrapping them on the newstands these days? Hmmm... don't expect the public library will have it... _-_-bear PS... JC, where's the rest of the Fender lowdown stuff...? __________________ _-_-bear http://www.bearlabs.com ...ur feeback please - like/dislike my what I have written? PM/email tnx. --

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