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Post subject: '67 Bassman Resurrection
Posted: Thu Aug 25, 2016 8:28 am
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Joined: Thu Aug 25, 2016 8:03 am
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I am trying to resurrect this 1967 Fender Blackface Bassman for a friend. I have spent weeks researching as much as I can on this amplifier. I have searched dozens of photos of other Blackfaces and can't find one that looks remotely close to this one. I have seen plenty with the blue Astron caps and a couple of the red/brown chocolate drop caps. But I have never seen one with this many chocolate drop caps. Plus, it appears that some of the caps have been changed, while the large filter caps are all original and mostly bad. So what do I have here? Are these bypass caps original? Did Fender switch part bins in the middle of this amp? Why only a couple of the Astrons? Has this thing been modded somehow? My experience level would not allow me to spot it just by looking at it. One other thing....no it has not been in a house fire! Yes...that black stuff appears to be from this thing getting so hot! Anyone care to offer their years of experience to someone trying to learn?

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Post subject: Re: '67 Bassman Resurrection
Posted: Thu Aug 25, 2016 12:36 pm
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Joined: Wed Mar 31, 2010 12:48 am
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Location: Tombstone Territory
For the most part the amp appears to be a stock AB165 Bassman. I believe those "red/brown" caps may have originally been orange drops and that thermal discoloration of the chassis did not occur due to heat from the amp. I'd guess that it was stored for some time in a cellar, right next to the furnace. The metal-cased electrolytic in the bias circuit appears to be a replacement as is the over-spec'd screen grid resistor on the V6 socket.

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: '67 Bassman Resurrection
Posted: Sun Oct 09, 2016 1:55 am
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Joined: Fri Feb 05, 2010 4:31 am
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Location: Province de Québec, Canada
I miss you post because I never look in Bass amp section.
To me a Fender Bassman, is not a bass amp, too many guitar player use it, never see bass player except in '60


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