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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 22nd April 2008, 04:29 AM   #1
sbelyo is offline sbelyo  United States
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Default Tubelab SE diode substitute

D2, D3

Manufacturer IXYS
Manufacturer Part Number DSEI12-12A
Description DIODE FRED 1200V 11A TO-220AC


Digikey and mouser are out of them until mid June...

Is there a substitute from mouser or allied that is just as good?
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Old 23rd April 2008, 12:21 AM   #2
sbelyo is offline sbelyo  United States
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I don't see anything on mouser
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Old 23rd April 2008, 03:14 AM   #3
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Any FRED diode that is rated for 1200 volts or more will work. Other TO220 packaged diodes with a "fast recovery" or "soft recovery" characteristic will also work.

I have used the IXYS DSEI 20-12A and the IR HFA06TB120PBF (now made by Vishay) before.
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Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
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Old 23rd April 2008, 04:52 AM   #4
sbelyo is offline sbelyo  United States
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Thanks George...

Is there any problem with using this resistor for R7 from mouser instead of the panasonic one from digikey.
https://www.mouser.com/Search/Produc...-MO2LT631R104J

It's bigger, but it looks like the lead spacing will just fit. I just don't want to use a part that will degrade the sound.
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Old 23rd April 2008, 05:30 AM   #5
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It's same value and same type (metal oxide). I don't see why it wouldn't do the job just as well.
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Old 23rd April 2008, 09:05 PM   #6
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I was in the same situation over the weekend, and I decided to order p/n 747-DSEI12-10A. This has nearly the same specs as the 747-DSEI12-12A, the only differences being:

10A 12A
------ ------
Vfwd 2.1V 2.2V
Pdsp 75W 78W
Vrev 1000V 1200V


Are these specs not acceptable? I noticed that Mr. Tubelab mentioned a reverse voltage of 1200V...

Should I order the DSEI20-12A instead?

Thanks,
Eddie
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