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Post subject: Re: Fender Pro Amp 1961 - thoughts?
Posted: Sat Jun 18, 2016 4:06 pm
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BMW2002Ti wrote:
However, the ground points of the resistor and bias filter cap may cause a ground loop --- since it's a distance from each other, with the pot being placed on the back of the chassis.


A small auxiliary ground buss fashioned from sheet brass might be prudent......

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: Fender Pro Amp 1961 - thoughts?
Posted: Thu Jun 23, 2016 9:05 pm
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This is becoming interesting.
The tech told me that despite having the 6G5 marked on the sticker (early 1961 built) the amp has 6 7025/AX77 tubes, which means its a 6G5-A model. Of course we all know that Fender stickers are not to be relied upon.
However the bias board is consistent with the 6G5 schematics.
Looks like some sort of a Leo's hybrid ..

:mrgreen:


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Post subject: Re: Fender Pro Amp 1961 - thoughts?
Posted: Fri Jun 24, 2016 6:27 pm
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NT,

Check the layout. I bet you have the 3-tube (3 X 12AX7) oscillator section for the tremolo-vibrato circuit. I love these amps. This is the genesis of Surf Rock! Yay!!! :mrgreen:

http://ampwares.com/schematics/pro_6g5a.pdf


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Post subject: Re: Fender Pro Amp 1961 - thoughts?
Posted: Fri Jun 24, 2016 10:54 pm
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That's correct, 3 tubes in the tremolo circuit, that's the one.

I'm picking up the amp tomorrow.

:mrgreen:


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Post subject: Re: Fender Pro Amp 1961 - thoughts?
Posted: Mon Aug 01, 2016 6:04 pm
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I will have to figure out how to post photos as my first try didn't work.
Thanks John


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Post subject: Re: Fender Pro Amp 1961 - thoughts?
Posted: Mon Aug 01, 2016 8:50 pm
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To post a photo. Go to Photobucket. Or some online site to share media. Upload your photos.

For Photobucket:

1.) Click onto photo you wish to post. See "Links to Share The Photo" on the right side?

2.) Now, scroll over the IMG address window.

3.) Left click onto address window.

4.) It will say: "Copied"

5.) Now, paste the copied IMG address into the window of this Forum.


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