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PostPosted: Sun May 14, 2017 4:28 pm 
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Joined: Wed Jul 09, 2008 1:14 am
Posts: 394
Location: Greensburg, PA
I picked up an old Alamo Challenger (Champ) that the guy put into a suitcase...

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He said it came with the ext. speaker jack on top. Currently there is a 12" Univox in the case. i am getting a 3.9 ohm reading on my meter. My question is, on the OT there is an unused tab. I have read that these have a 4 and 8 ohm output. Is the other tab the 8 ohm, maybe? Can I measure it somehow to find out? I would like to try it with an 8 ohm ext. cab that I have.


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Schemo for reference. The Amp is a '67 (pot dates). Can't imagine too much difference...

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