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Topic: Question for Mike Brown |
Brian Edwards
From:
Santa Fe, NM USA
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Posted 1 Feb 2007 5:42 am |
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What is the tube layout for the Peavey Valve King 112?
Thanks and best wishes,
Brian
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1971 Emmons PP and Webb 6-14E |
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Mike Brown
From:
Meridian, Mississippi USA
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Posted 1 Feb 2007 11:06 am Peavey Valve King 112
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| Three 12AX7's and two 6L6 GC's. |
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Brian Edwards
From:
Santa Fe, NM USA
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Posted 1 Feb 2007 11:45 am
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Mike:
Thanks very much for your response, but what I was really interesting in knowing is what each of the AX7s do. For example, if I wanted to substitute AT7s for the AX7s (to reduce gain), would I need to replace all three, or would one (or two) be sufficient. If so, which one(s) would I replace?
Thanks for all of your support!
Brian
_________________
1971 Emmons PP and Webb 6-14E |
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Mike Wheeler
From:
Delaware, Ohio, USA
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Posted 1 Feb 2007 1:40 pm
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Brian, I think one of our other tube gurus would be better suited to answer that. Mike might be reluctant to voice an opinion due to warranty issues.
OK, guys....where you at?? 
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Best regards,
Mike |
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Brian Edwards
From:
Santa Fe, NM USA
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Posted 1 Feb 2007 2:28 pm
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Mike:
Thanks,
Brian
_________________
1971 Emmons PP and Webb 6-14E
Last edited by Brian Edwards on 1 Feb 2007 9:11 pm; edited 1 time in total |
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Brian Edwards
From:
Santa Fe, NM USA
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Posted 1 Feb 2007 9:10 pm
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Mike:
Any assist is much appreciated!
Brian
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1971 Emmons PP and Webb 6-14E |
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thurlon hopper
From:
Elizabethtown Pa. USA
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Posted 2 Feb 2007 5:58 am
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Brian, i am using a Twin Reverb Fender with 4 12AX7's and 2 12AT7's and i think the T designation indicates at the 12AT7's
are meant to interact with the transformer sections in the amp.
In the Twin going from left to righ facing the fornt of the amp, each third tube is a 12AT7. when i tried US made tubes in these locations i found that the overall volume and drive of the amp was lowered quite a bit. By replacing the US tubes with Jolida chinese made tubes the amp lit up. Lots more drive and response. Didn't have access to Soviet-made tubes , so i don't know if they would react in the same way. There are Forum members who seem quite knowledgeable about tubes so maybe they can explain it to you better. Hope you find the solution you are looking for. TJH |
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Brian Edwards
From:
Santa Fe, NM USA
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Posted 2 Feb 2007 9:51 pm
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up to the top
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1971 Emmons PP and Webb 6-14E |
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John Daugherty
From:
Rolla, Missouri, USA
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Posted 3 Feb 2007 7:55 am
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Brian, the AT7 has LESS gain than the AX7.
I suggest,for starters, replacing only the first tube in the chain. It is probably located near the end of the amp, on the same end as the input jacks.
Some amps use a 12AY7 which is a lo-noise version of the 12AX7 (if my senile memory serves me correctly). 
[/u]
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www.home.earthlink.net/~johnd37
www.myspace.com/johndaughertysteelguitar |
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Brian Edwards
From:
Santa Fe, NM USA
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Posted 4 Feb 2007 10:22 am
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John:
Thanks and understood. That's why I stated it the way I did (i.e., "substitute AT7s for the AX7s (to reduce gain)"). Nevertheless, I did replace the first AX7 with an AT7 and it does seem to reduce the gain a bit. Even without the tube substitution, it is a nice sounding amp for pedal steel.
I would still like to know what the tube layout of this amp is, so if anyone can pass along the answer, I would appreciate it.
Thanks again for the suggestion and best wishes,
Brian
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1971 Emmons PP and Webb 6-14E |
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Mike Wheeler
From:
Delaware, Ohio, USA
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Posted 5 Feb 2007 11:06 am
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Brian, I'd send Mike Brown an email asking what each tube's function is...as seen from the back of the amp. I think he could answer that question for you, but not when it regards tube substition. Good luck.
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Best regards,
Mike |
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