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Post subject: 1974 twin reverb only works when external speaker on
Posted: Sat Dec 06, 2014 3:55 pm
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I was given a 1974 Fender twin reverb (silverface) that was dead. I replaced the fuse and tubes and it came to life, but no sound came out of the speakers. I attached a Blackstar external speaker cabinet to the "ext out" as a way to trouble shoot the problem, and low and behold both the Fender speakers and Blackstar work.

How can I get the Fender to work without need to plug in an external amp?

Thanks, mark


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Post subject: Re: 1974 twin reverb only works when external speaker on
Posted: Sat Dec 06, 2014 6:32 pm
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Hi mccrossss,

It sounds like the jacks are swapped around. Do the internal speakers work when plugged into the external jack, with nothing plugged into the other jack?

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Post subject: Re: 1974 twin reverb only works when external speaker on
Posted: Sun Dec 07, 2014 4:01 am
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Or internal speaker jack is broken.


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Post subject: Re: 1974 twin reverb only works when external speaker on
Posted: Mon Dec 08, 2014 6:11 pm
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You might check your amps wiring "layout" to determine if the jacks are miss-wired..
http://schems.com/manu/fender/fender.htm

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Post subject: Re: 1974 twin reverb only works when external speaker on
Posted: Tue Dec 09, 2014 4:05 pm
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Thanks! It is miss-wired.


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Post subject: Re: 1974 twin reverb only works when external speaker on
Posted: Tue Dec 09, 2014 5:45 pm
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mccrossss wrote:
Thanks! It is miss-wired.


That's good you found the problem...:D

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It's a good day, I woke up, again...

Am Std 60th Ann Comm
Am Special
USA Prof HSS
2001 MIM Std
Epiphone Std Plustop PRO
Tele AmOrig 50's
Tele Elite
Takamine Acoustic/Electric EG-531S
Blueridge Acoustic/Electric BR-J33CEO


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