MOS RM3 transistor

arnoldlee · Post by **arnoldlee** » Tuesday 19th Aug 2008, 9:07

I have a friends amp which is KAPUT, the 4 output devices have had the numbers/letters removed by the manufacturers. I have discovered they are MOS RM3 by looking at RM's site, but I cannot locate a supplier, at least not in the UK. Is there an alternative and is it worth the trouble.
The amp is desribed as a Midland 747B Booster, with KL 203 rel 6.0 on the board.

zodiac · Post by **zodiac** » Thursday 21st Aug 2008, 11:40

You have a PM.

timrim · Post by **timrim** » Thursday 21st Aug 2008, 17:50

I'll bet those are IRF 520's!

Chevin · Post by **Chevin** » Thursday 21st Aug 2008, 21:00

The RM3 is not a IRF520 but may work with lower power output.
The amp maker removers the ID from the transistor making hard to find out what they are.
The right mosfet is HUF7534P3 and are made by Fairchild.

Chevin.