So I'm at a point where I would like a new project and I feel like this dead Audio Research amp from the 80's is where that project should live. What I'm looking for here is suggestions on plans (or kits, pcb's etc...) that might fit in the chassis. If it could use the existing power supply that would be even better as it's beefy as hell.
Some details:
Existing power supply main DC rails are +/- 50V (one pair for each channel) with a 60VDC 30,000uF cap each (2 in total).
Also has a +/- 75V supply with a pair of 1900uF caps each (4 in total), this goes into the "tracking regulator" circuit that gets +/- 55V and +/- 15V
Here's a link to the schematic for the power supply, it's for the earlier D100 but from what I have read they're the same power supply circuit.
The heat sink and potential output situation, so there are 32 mounting points for TO-3 transistors on this thing. So a design that uses that body would be ideal (probably not 32 though).
Chassis is about 5" tall and there's about 2" of clearance from the mounting plate for the transistors and the power supply. Kinda tight, but possibly doable.
I'm open to Class A, class A/B, hell class D if something would work well with that dinosaur of a power supply and sound good. Two channels, don't need tons of power but not opposed to it. Comfortable with a reasonable amount of tinkering, point to point wiring etc...
Now is this a fool's errand? Is wanting to use the original power supply a bad idea? I'm open to suggestions here and won't take anything personally. Also for anyone wondering why I don't just fix this, I've considered it, it needs the "analog modules" they made back then, some people have reverse engineered them but apparently these amps were kind of garbage even when they were perfect, also the guy that passed this along to me only knew that "one channel was out" so not sure if some of the 32 MJ15003/MJ15004's are dead.
Here's some pics.
Some details:
Existing power supply main DC rails are +/- 50V (one pair for each channel) with a 60VDC 30,000uF cap each (2 in total).
Also has a +/- 75V supply with a pair of 1900uF caps each (4 in total), this goes into the "tracking regulator" circuit that gets +/- 55V and +/- 15V
Here's a link to the schematic for the power supply, it's for the earlier D100 but from what I have read they're the same power supply circuit.
The heat sink and potential output situation, so there are 32 mounting points for TO-3 transistors on this thing. So a design that uses that body would be ideal (probably not 32 though).
Chassis is about 5" tall and there's about 2" of clearance from the mounting plate for the transistors and the power supply. Kinda tight, but possibly doable.
I'm open to Class A, class A/B, hell class D if something would work well with that dinosaur of a power supply and sound good. Two channels, don't need tons of power but not opposed to it. Comfortable with a reasonable amount of tinkering, point to point wiring etc...
Now is this a fool's errand? Is wanting to use the original power supply a bad idea? I'm open to suggestions here and won't take anything personally. Also for anyone wondering why I don't just fix this, I've considered it, it needs the "analog modules" they made back then, some people have reverse engineered them but apparently these amps were kind of garbage even when they were perfect, also the guy that passed this along to me only knew that "one channel was out" so not sure if some of the 32 MJ15003/MJ15004's are dead.
Here's some pics.