Here in Norway they sell an power-amplifier named Cambridge P500 at the cheap price 1595,- NKR (aprox 235 US$) and this must be a bargain !?
If i want to build me an amp this would barely be enough for the box, and transformer........
The amp is spec'd at 2*65W /8ohm and 2*85W /6ohm
(not too impressive but....)
My idea was: If this is a "standard-builded" amplifier it just may be possible to uppgrade it with a new toroid-transformer?, some new/better/more CAP's and maybe some other things, and it would/could be possible to run it in BRIDGE-mode !? .........approx1*200W ?😀
This could be some really cheap mono-blocks ????
Any with ideas/ schematics ?????
P
If i want to build me an amp this would barely be enough for the box, and transformer........
The amp is spec'd at 2*65W /8ohm and 2*85W /6ohm
(not too impressive but....)
My idea was: If this is a "standard-builded" amplifier it just may be possible to uppgrade it with a new toroid-transformer?, some new/better/more CAP's and maybe some other things, and it would/could be possible to run it in BRIDGE-mode !? .........approx1*200W ?😀
This could be some really cheap mono-blocks ????
Any with ideas/ schematics ?????
P
If you open it up you'll find some very nice parts.
The transformer is very high quality as are the output trannies.
Nice heatsink as well.
It really is worth it just for the parts if your so inclined.
🙂 /sreten.
The transformer is very high quality as are the output trannies.
Nice heatsink as well.
It really is worth it just for the parts if your so inclined.
🙂 /sreten.
sreten said:
Do You have any idea about the size of the transformer (in VA), what kind/ how much capasitors, and what kind of output BJT's used.
Need as much info as possible about this "box" before i bye one (or two...🙂 ).
Well when it first came out there was one in a shop window
window with a perspex cover so I gave it the once over.
This was a few years ago so I can only remember the basics.
The transformer was unusual - it had a 0 shaped core with the
windings on the straight sections so you could see the core in
the c sections of the 0.
I thought this type of construction was only used at higher
frequencies with the core air-gapped, but I'm pretty sure
there is no air gap in this case.
The heatsink ran across the full hieght and depth of the case,
the depth of the fins being similar to the slots in the cover.
The output transistors seemed to be the same as in my
Audiolab 8000A, which is pretty good in my book.
I don't remember seeing lots of rectifiers and capacitors, just
your basic supply - so perhaps some scope there ?
If you must rebuild it into mono blocks I'd suggest bridging is not
the way to go - keep the transformer and parralell the output
transistors is what I'd do, or more simply parralell the channels.
🙂 /sreten.
window with a perspex cover so I gave it the once over.
This was a few years ago so I can only remember the basics.
The transformer was unusual - it had a 0 shaped core with the
windings on the straight sections so you could see the core in
the c sections of the 0.
I thought this type of construction was only used at higher
frequencies with the core air-gapped, but I'm pretty sure
there is no air gap in this case.
The heatsink ran across the full hieght and depth of the case,
the depth of the fins being similar to the slots in the cover.
The output transistors seemed to be the same as in my
Audiolab 8000A, which is pretty good in my book.
I don't remember seeing lots of rectifiers and capacitors, just
your basic supply - so perhaps some scope there ?
If you must rebuild it into mono blocks I'd suggest bridging is not
the way to go - keep the transformer and parralell the output
transistors is what I'd do, or more simply parralell the channels.
🙂 /sreten.
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