Hi Gang, time to start a B-1 thread of my own and stop highjacking other's.
A little while back I purchased a nice looking B-1 with UC-1.
I played it for a bit after I got it and it sounded so so, but nothing to write home about. At low volumes it was definitely lacking the definition I expected. It was also getting extremely hot...way hotter than my BX-1s which I was also running at the time.
Needless to say, It needed TLC, so I packed it up and stored it ....until recently.
Time has come to dust this B-1 off and give it a "Quickie". The goal is to have it singing like a canary by Christmas. I do not intend to do a full rebuild just yet, but I will go a bit beyond to the average recap job.
Besides a lot of dust and a bit of corrosion on the top of one of the driver boards brackets, I do not see anything out of ordinary. The corrosion seems to have originated from a liquid spill at some point in the past. Very minimal damage and non consequential now...
Here are some shots of under the hood:
Some heat damage to one of the caps in the middle PSU/Protection board
The good news, this thing is cleaning up very nicely. I think I will make a model citizen out of it
Here are some of the individual boards:
This thing was well roasted. One of the legs was no longer attached OUCH! Lucky Lucky B-1!
This is a bad design. The three fat 2w resistors below are roasting this cap every-time the amp is on. I am moving it to the back side and will stagger those resistors so that the lower ones do not bake the ones towards the top.
Still working on it, but this is kind 'a what I have in mind:
Nothing eventful on this board, except dirt and corrosion on the TO220's heatsinks:
Edit: I should have mentioned that I replaced a hand full of 458s on this board
A little while back I purchased a nice looking B-1 with UC-1.
I played it for a bit after I got it and it sounded so so, but nothing to write home about. At low volumes it was definitely lacking the definition I expected. It was also getting extremely hot...way hotter than my BX-1s which I was also running at the time.
Needless to say, It needed TLC, so I packed it up and stored it ....until recently.
Time has come to dust this B-1 off and give it a "Quickie". The goal is to have it singing like a canary by Christmas. I do not intend to do a full rebuild just yet, but I will go a bit beyond to the average recap job.
Besides a lot of dust and a bit of corrosion on the top of one of the driver boards brackets, I do not see anything out of ordinary. The corrosion seems to have originated from a liquid spill at some point in the past. Very minimal damage and non consequential now...
Here are some shots of under the hood:
Some heat damage to one of the caps in the middle PSU/Protection board
The good news, this thing is cleaning up very nicely. I think I will make a model citizen out of it
Here are some of the individual boards:
This thing was well roasted. One of the legs was no longer attached OUCH! Lucky Lucky B-1!
This is a bad design. The three fat 2w resistors below are roasting this cap every-time the amp is on. I am moving it to the back side and will stagger those resistors so that the lower ones do not bake the ones towards the top.
Still working on it, but this is kind 'a what I have in mind:
Nothing eventful on this board, except dirt and corrosion on the TO220's heatsinks:
Edit: I should have mentioned that I replaced a hand full of 458s on this board
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