1n4007 sub

patrick620 · 2373

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Offline patrick620

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on: December 29, 2020, 03:08:51 PM
In a previous GE integrated amp restoration my customer wanted me to sub the 1N4007 diodes with FR307 "fast recovery" diodes. I still have a few on hand. My question is, does it really matter on this new build?
« Last Edit: December 29, 2020, 03:11:27 PM by patrick620 »


Online Paul Birkeland

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Reply #1 on: December 29, 2020, 03:14:44 PM
The UF4007 diodes we supply are a bit of an improvement over normal/fast diodes.  UF is "ultra-fast".  Does it matter?  I suspect not so much! To impress your customer, you could recommend the UF4007 in place of the FR307 though.  Whenever I see an old tube amp with SS high voltage diodes, I always replace them with UF4007s.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline patrick620

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Reply #2 on: December 29, 2020, 03:24:25 PM
Just took another look at the parts list. They are UF. My bad. In that old GE resto I actually replaced the old Selenium rectifier with FR307. Upgrade either way at the time ;) I really like this forum and am really looking forward to getting into this build. Thank you for the response.


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