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Old 9th March 2007, 08:48 AM   #1
mroovka is offline mroovka  Poland
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Default Ampeg SVT-VR or SVT-CL Schematics

Hello everybody,
I'd like to build tube amplifier on my own and I had chosen Ampeg SVT, but have a problem with schematics:
On the Internet I can only find an old SVT schems (http://users.aol.com/bluemuse/ampeg.html -SVT preamp and SVT poweramp). that uses 12DW7, 12BH7, 12AX7 & 6C4 tubes in preamp and driver stage. This times it's very hard to find 12DW7 & 12BH7, even impossible in my country :/
Does anybody have the new schematics (with 2x12AX7+ 12AU7 in preamp and 12AX7 + 2x12AU7 in driver) or can just adjust the older schematics to use only 12AX7 & 12AU7 against DW7, BH7 and 6C4?

I'll be enjoyed with every help

--
Peace
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Old 31st March 2007, 10:29 PM   #2
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try to look at these (skus si vybrat z tychto):
http://www.schematicheaven.com/ampeg.htm
http://www.freeinfosociety.com/elect...page.php?cat=1
I don`t actualy know about any site with the up-to-date circuits of Ampeg, anyway SVT is the classic , I`m also building one wright now...
Anyway, our slovakian JJ electronic make them - ECC832
and the half of ECC82 is an equivalent to 6C4
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Old 1st April 2007, 09:47 AM   #3
teemuk is offline teemuk  Finland
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SLM electronics had the factory schematics of some "newer" Ampeg and Crate models on their website about a year ago but now they seem to be all gone. I guess those companies are now trying to make profit with selling them. Anyway, you should check - even back then the link to those files was pretty "hidden". I have the schematics for SVT-CL with 12AX7 preamp tubes but I'm not sure whether it's legal to share them.

Edit:
The Ampeg website states:
"At this time Ampeg does not display schematics online. However, if you wish to obtain a physical copy of product schematics, please contact the LOUD Technologies Inc. Service Center at 1-800-898-3211."
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Old 1st April 2007, 10:59 AM   #4
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Default Hi!

All about tubes is OK, what about output transformer ?
Regards zeoN_Rider
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Old 1st April 2007, 03:39 PM   #5
mroovka is offline mroovka  Poland
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Default SVT-3 schematic

I've posted to Ampeg. They sent me requested schematics. Thanks for any answers.
BDW: It's good to know about ECC832
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Old 1st April 2007, 06:15 PM   #6
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That`s great news. Would you mind sending them on my mail ?
I would appriciate the new models...
thx
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Old 2nd April 2007, 10:39 PM   #7
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or you can upload then for some time here, so I and the others interested in them could get them..
did you get the SVT CL ? that would be so cool
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Old 30th July 2008, 09:21 PM   #8
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sorry to resurrect such an old thread, did anybody ever finished the SVT?

I'd like to build the SVT preamp and then use it with a serious poweramp,,,

BTW I got some schem's if anybody is still interested,,, they're marked SLM Electronics so I guess they're original,,, still I didn't check for any error,,,
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Old 30th July 2008, 10:35 PM   #9
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yes, I have completed SVT3 pro preamp and i really like the sound of it, I managed to acompany it with the Leach poweramp build for 220W and have a realy neat sound, powerful, but unfortunately I don`t have any serious bass box for it, just a bass speaker, but It sound great anyway.
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Old 31st July 2008, 08:05 AM   #10
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beautiful,,, do you have a schematic for your build mate?

I got the SLM ones but they're a bit too complicated for my being thick,,,
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