OT protection diodes SR-2873?

[tedmich]

whats the best replacement for the Peavey SR-2873 which I believe is an old Motorola MR250-2, 2KV 250mA fast recovery diode?

2 series UF4007?
Vishay RGP02-20E-E3/54 ? maybe discontinued...
Rectron R2000F-B
http://www.rectron.com/data_sheets/r1200f-r2000f.pdf
more voltage?
http://www.rectron.com/data_sheets/r2500f-r5000f.pdf

on the Rectron's is 200mA enough?

[Enzo]

You could always call PV and have them send you the exact part.

[jrfrond]

I usually use the Rectron R3000, which is a 3kV diode, but not fast recovery, which is REALLY not necessary.

Then again, transient suppressor diodes usually aren't necessary at all, unless you are protecting cheap output transformers as seen on many new tube amps.

[Enzo]

Or when the customer uses cheap speaker cords, or guitar cords for speaker cords, or has loose wiring in his cabs, or forgets to plug his cabs in, or plugs them into the FX return...

[oskar]

I use always for this application , the GP02-40 , on europe it's available thru RS components and others.


oskar.

[Steve Conner]

I think three series 1N4007s is a common bodge. Two to get your 2kV PIV rating, and a third one for luck.

I agree that they don't really need to be fast recovery, since they shouldn't normally even be conducting at all.

I'm sure I remember using those GP02-40 diodes in a FWCT rectifier. I wanted fast recovery because I believed that thing about FREDs sounding better at the time.

[tedmich]

Originally Posted by Steve Conner

I I believed that thing about FREDs sounding better at the time.

its not true?


FRED Durst, as an example, does sound terrible...no one ever recovered quickly from hearing him for the first time...

audiophiles do love their Stealth diodes...