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#1523664 - 12/18/05 12:20 PM B-52 Stealth Series ST-100A Question
Puzzleface Offline
Member

Registered: 12/18/05
Posts: 19
Loc: Kansas City, MO
Purchased this amplifier within the last year and I'm in the process of replacing the Pre-Amp tubes. According to the Instruction Manual it says that it uses 5 12AX7 Pre-Amp tubes and also 1 12AT7 Tube for the Reverb. Like an Idiot I pulled all 6 tubes but have no clue which of the 6 slots are for the pre-amp tubes and which of the 6 slots is for the reverb tube.

The B-52 Website does not have a downloadable schematic and the instruction manual does not tell me anything beyond basic operation instructions. Does anyone here know, from left to right on the back panel, what the tube configuration is? I guess, more importantly, does it really matter in the grand scheme of things considering that the tubes look, appearance wise, to be virtually identical.

Thanks, in advance, for youe help.

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GP Island
#1523665 - 12/18/05 08:08 PM Re: B-52 Stealth Series ST-100A Question
J J Offline
Platinum Member

Registered: 08/22/03
Posts: 1095
Loc: Oregon, Wisconsin
On mine it's the 3rd input down for the 12AT7, counting from the side with the bigger tubes.

Welcome, try and stay a while!

PS - Bitchin amp, huh!

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#1523666 - 12/19/05 07:15 PM Re: B-52 Stealth Series ST-100A Question
Puzzleface Offline
Member

Registered: 12/18/05
Posts: 19
Loc: Kansas City, MO
THANK YOU!!!!! Damn. I thought I was going to go slightly insane trying to find out that info. I even contacted B-52 and am still waiting for one of their TECH guys to get back to me.

Yeah I love the amp......but I have never liked SOVTEK for tubes I use JJ's (hmmm......no pun intended!?!?).

I'm happy to have found this forum and I will stay.

Cheers

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#1523667 - 12/19/05 08:36 PM Re: B-52 Stealth Series ST-100A Question
J J Offline
Platinum Member

Registered: 08/22/03
Posts: 1095
Loc: Oregon, Wisconsin
hey no problem man!

What kind of guitars do you play? feel free to make an intro thread for yourself. This isn't like other guitar forums at all. No big egos or anything...

Pull up a chair!

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#2652751 - 01/07/15 01:34 AM Re: B-52 Stealth Series ST-100A Question [Re: J J]
Sianou Offline
Member

Registered: 07/19/14
Posts: 1
Tube diagram for B-52 St-100A (given from B-52 tech) is (from left to right): V1-V4 - preamp 12AX7, V5 - reverb 12AT7, V6 - phase inverter 12AX7, 4 power tubes and last one - rectifier 5AR4. Also I have schematics of the amp, if someone need it, let me know.


Edited by Sianou (01/07/15 01:36 AM)

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#2652773 - 01/07/15 04:54 AM Re: B-52 Stealth Series ST-100A Question [Re: Sianou]
Caevan O'Shite Offline
20k Club

Registered: 04/05/02
Posts: 22874
Loc: The Great Spirit's Handprint o...
Originally Posted By: Sianou
Tube diagram for B-52 St-100A (given from B-52 tech) is (from left to right): V1-V4 - preamp 12AX7, V5 - reverb 12AT7, V6 - phase inverter 12AX7, 4 power tubes and last one - rectifier 5AR4. Also I have schematics of the amp, if someone need it, let me know.


Hey, thanks, Sianou, and welcome to the GPF!
_________________________
Ask yourself- What Would Ren and Stimpy Do?

~ Caevan James-Michael Miller-O'Shite ~
_ ___ _ Leprechaun, Esquire _ ___ _

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#2652817 - 01/07/15 07:54 AM Re: B-52 Stealth Series ST-100A Question [Re: Caevan O'Shite]
SEHpicker Offline
Platinum Member

Registered: 05/16/02
Posts: 1226
Loc: Inverness, Florida
I know a guy who plays through a B-52 combo - Killer amp but OMG - you need a forklift to move it around!
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SEHpicker

www.huntgroupproductions.com

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