[Eeyore]

wrote:

Eeyore wrote:
Tim Schwartz wrote:
wrote:
any idea where i can get the following MOSFETs?

1) A1102
0NY

2) C2577
09Y

3) C2578
30Y

4) A1103
38Y

The old ones in one of my amplifiers have blown....decided to have a
look into replacing them....

thanx

/\/\ad-Doggie
As the other posters said, these are NOT MOSFET's. The full numbers are
2SA1102

2SA1103

2SC2577

2SC2578

The 1103/2578 are slightly more rugged than the 1102/2577, so I would
suggest using them. The most rugged version of this family are the
2SA1106 and 2SC2581, which you could use in both channels. They are the
highest voltage and current rating of the group. They will NOT give
your amplifier more power. Be aware that other parts could have failed too.

In particular, watch out for fusible (flameproof) resistors designed to open
under fault conditions.

I've had a look over the amp twice before....didn't look like
anything else was blown...but i will have a look again just to double
check.

You won't see a blown fusible. That's the whole point ! They're normally 'cement'
covered instead of lacquer so they don't burn and set the equipment alight and the
metal film underneath just fuses. The Japs use these a lot IME. And expect to find a
few in the last driver stage too.

Graham