Retired from amp building, sure. But still chasing tone.

T-Rex

T-Rex

Well-Known Member
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Reworked and finished the last two amps that I had kept for myself. The first was the 65 Princeton Blackface build. This was the amp that was the straw that broke the

camels back. I had worried the very brass balls off of the monkey trying my best to figure out what was wrong with this build. tore it apart 3 times, rebuilt and had issues. Finally found the new

Hammond OT had a resistance of over 400 ohms between the primary leads (should have been around 70 to 75 ohms). During the last rebuild, I had decided to go with a Rob Robinette Version

similar to the 65 Princeton Reverb, but the reverb circuit is taken out but grids leaks left in. Gives a similar result to the Blackface AA964, but with the added gain of the reverb recovery stage. Then I

also decided to go with Cathode bias, delete the Vibrato. During checking the bias, using the Uncle Doug method, is where I found the primary winding so far off. Results are a most beautiful clean

am heard in along time Pristine cleans (replaced the OT , of course with a MPS version). Bought a used Omni reverb pedal, and DANG what a fine amp. A couple of pics below



https://imgur.com/a/qhSwLAL
 
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I have a '64 tremolo version of this amp I've gutted and rebuilt from the ground up.

MtaOJc4.jpg


p5z7tZc.jpg
 
Second amp was the Fender 6G3 version of a Brownface Deluxe. I had built two similar versions of these before, so no re-inventing the wheel. Does not have the Vibrato, and is

cathode bias. I did change the values of the coupling caps in the preamp circuits. The Normal channel was changed to a .1uF, the bright channel changed to a .47uF. Deleted the

.003 cap across the plate on the norma channel too. Wow, what a round, warm full sounding amp. Not dark in any matter at all. A happy camper here.

https://imgur.com/a/JifndGF

https://imgur.com/a/oBHJsa2

https://imgur.com/a/FxFdsoR
 
Nice work. Princeton tone is supposed to be great, I never had a chance to play one.
I do hope someday to build a black face like Rob’s.
 
As usual, nice work with both amps, Terry … :cheers:


T-Rex said:
Reworked and finished the last two amps that I had kept for myself. The first was the 65 Princeton build. This was the amp that was the straw that broke the

camels back. I had worried the very brass balls off of the monkey trying my best to figure out what was wrong with this build. tore it apart 3 times, rebuilt and had issues.
Click to expand...
Yeah, I’m currently going through the same issues with my build that I started about 4 months ago… Which leads to your 2nd post:
T-Rex said:
Second amp was the Fender 6G3 version of a Brownface Deluxe. I had built two similar versions of these before, so no re-inventing the wheel. Does not have the Vibrato, and is

cathode bias. I did change the values of the coupling caps in the preamp circuits. The Normal channel was changed to a .1uF, the bright channel changed to a .47uF. Deleted the

.003 cap across the plate on the norma channel too. Wow, what a round, warm full sounding amp. Not dark in any matter at all.
Click to expand...
You might remember that 6 months ago I started a thread about the possibility of building a 6G3 clone on the “Lite” side: Thoughts About Converting My Tweedy 5E3 to a Brownface 6G3?. Even though my build is complete, there is a slightly annoying audio artifact, that with my obsession has lightened my wallet even further. I’ve been holding off starting a thread on this build until I feel I got something to brag about!

Meanwhile, I went over to The Amp Garage forum (Land of Many Amp Nerds) to seek help. I’m still stumped ! Sound clip and photos cannot be accessed unless you sign on as a member but the thread is at the following link:

Swirling Fizzy Tone on Decaying Notes - The Amp Garage

ampgarage.com
 
syscokid said:
As usual, nice work with both amps, Terry … :cheers:



Yeah, I’m currently going through the same issues with my build that I started about 4 months ago… Which leads to your 2nd post:

You might remember that 6 months ago I started a thread about the possibility of building a 6G3 clone on the “Lite” side: Thoughts About Converting My Tweedy 5E3 to a Brownface 6G3?. Even though my build is complete, there is a slightly annoying audio artifact, that with my obsession has lightened my wallet even further. I’ve been holding off starting a thread on this build until I feel I got something to brag about!

Meanwhile, I went over to The Amp Garage forum (Land of Many Amp Nerds) to seek help. I’m still stumped ! Sound clip and photos cannot be accessed unless you sign on as a member but the thread is at the following link:

Swirling Fizzy Tone on Decaying Notes - The Amp Garage

ampgarage.com
Click to expand...
Ask Martin Manning over there.

He's a cool dude !
 
My tweed Princeton build I had to remove the negative feedback loop to the speaker output jack I did use the garbage Classic Tone transformers
why did I say garbage the first power transformer failed Classic Tone soon out of business
 
Has anyone hear been on the SEwatt forum lately. I can not get them to pay attention to my reset
 
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