Orion HCCA2100

[Dr Zeus]

I dont want to tell anyone how to fix their amp repairs but DANG. I'd say dont ever use the company named Audio Surgeons at (404)-286-1513; if they are even still in business. I swear I remember hearing about this place stealing people's electronics on the news about 2 months back. This amp was last known to be repaired by them in 2004 which is suprising that it didnt blow since then.


The customer gave me this amp to check out after getting it locally for a decent price. The amp works, but, I'm not to confident in the past repair job<s>. The outside of this amp is very nice and worth fixing. The inside is missing a few screws but all the screws holding down the transistor bars are here. The large diodes next to the B+ wires are 1/2 clipped off the pcb; like someone thought this would be a good idea. Several gate resistors are black and burned in the power supply section, but are still within tollerence and thus were used for the previous repair. The insulators were never cleaned up during the last disasembly and thus sandwitched dirt and grit fails to impress.

The worst of this amp is the power supply is using not one, not two, but THREE different fets. The originals being National NDR7060, I also found a few IRFZ48 and IRF3205s in the mix. Output transistors are all good. The NDR7060 I'm guessing are 60v 70A.

Will IRF3205 work without drive circuit modification?

This amp is very repairable as the board is in excelent shape. i think this amp only needs 28x Fets and gate resistors.

[Perry Babin]

You shouldn't post something like this unless you know for a fact that they did the work and that no one has tampered with it since.

[Dr Zeus]

Im not sure about the ethics in this sort of thing, but; I did break their repair seal. I guess it could be possible someone before them could have done the bogus repair. Also i meant to post 2003, not 2004 in my original post.

[Perry Babin]

What if you went into an amplifier that had a bad previous repair but only had a simple problem like a bad solder connection or a single burned resistor (like the one between the RCA and chassis ground). Could you justify charging the owner $100-200 to redo the repair that you don't like even though it only needs a very inexpensive repair to get it back working?

I don't know what they did and neither do you. How would you feel if someone posted something like this claiming that you did inferior work. Unless there is a pattern of poor quality work (there is one such shop in Baton Rouge) that repeatedly produces poor quality repairs, you can't make a judgment about any particular business.

My suggestion is that you have the mods remove this entire thread.