From postmaste–(at)–riodeel.com Sat Feb 28 22:40:59 CST 1998
Article: 88325 of alt.guitar.amps
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From: postmaste–(at)–riodeel.com (Ned Carlson)
Newsgroups: alt.guitar.amps
Subject: Re: 6SC7 to !2AX7 Tweed conversion help WTD.
Date: Sun, 01 Mar 1998 00:12:33 GMT
Organization: Triode Electronics
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On Fri, 27 Feb 1998 23:41:42 GMT, bhatche–(at)–indspring.com (Bill
Hatcher) wrote:

>I want to swap one of the channels on my Tweed Pro to use a 12AX7
>instead of the 6SC7. Groove Tubes makes a product called a
>”substitube” that is an 8pin male socket on one side and a nine pin
>female on the other. Cost $40!!! Can someone tell me the wiring
>diagram to make one of these out of an old octal base and a 9 pin
>socket and some epoxy.

You might consider picking up a tube manual for $14,
it’ll answer this and a lot of other questions…

12AX7
Pin Element
1 Plate 1
2 Grid 1
3Cathode 1
4Fil
5Fil
6Plate 2
7Grid 2
8Cathode 2
9Fil

Jump pins 4 & 5
Jump pins 3 & 8

6SC7
1 Shell ground
2 Plate 1
3 Grid 1
4 Grid 2
5 Plate 2
6 Cathodes
7 Fil
8 Fil

You might like 12AY7 or 5751 in there
better than 12AX7, a lot of folks do.

Ned Carlson Triode Electronics,2225 W Roscoe St
Chicago, IL, 60618 USA ph 773-871-7459 fax 773-871-7938
“Worldwide Service, Neighborhood Prices” since 1985
Open 12:30 to 8 PM CT, (1830-0200 UTC) 12:30-5 Sat, Closed Wed & Sun
See our web site at http://www.triodeel.com
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