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Post subject: Is this the blackface or silverface circuit??
Posted: Sun Feb 06, 2011 10:07 pm
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Can anyone tell if this 1967 Fender Twin Reverb circuit is the blackface AA763 or AB763, versus being the silverface? The code on the inside of the chassis is T293267, indicating it was made on the 32nd week of 1967. Also, on the back on the amp is the serial number A10194, also indicating it could be the 1967 blackface according to the leading research on serial number indentification for Fender amps (http://www.superiormusic.com/page195.htm). On this inside of the amp, the tube chart claims it to be the AB763 circuit, but this cannot be trusted as Fender put this inside the amps well into the 1969 silverface models.

The cosmetic face of the amp is the silverface, with the aluminum edging around the grill cloth, the black vertical lines on the faceplate, no master volume obviously.

Any ideas? This is such a tricky time period for Fender Twins, I'm hoping someone can identify it based on the look of the circuit board itself. I have more pics if it helps. Thanks!!


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Post subject: Re: Is this the blackface or silverface circuit??
Posted: Sun Feb 06, 2011 10:28 pm
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Joined: Wed Mar 31, 2010 12:48 am
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It's the AB763 revision. The later AC568 can be quickly identified by its neoprene-insulated wiring and very prominent coax-type cabling within the V2 stage of the trem channel preamp.

HTH

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Is this the blackface or silverface circuit??
Posted: Mon Feb 07, 2011 9:06 am
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Joined: Fri Dec 12, 2008 5:32 pm
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it's a blackface


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