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1 piece bridge rectifiers - whats inside?

Naysayer

Well-Known Member
Mar 6, 2020
176
133
53
New York
Anyone ever open one up or see inside a broken one?
If I guess that 'inside are 4 axial diodes arranged so the case merely facilitates cooling' would I be correct?
My homebrew DC filament attempt (<6A) encountered regulator voltage-drop and high-heat from diodes so I'm working through it. I could ditch the DC plan but not until I understand why.
neil, nyc
 

If I guess that 'inside are 4 axial diodes arranged so the case merely facilitates cooling' would I be correct?
That's about it, the higher current ones are bolted to a heatsink to dissipate heat.
Even high current single diodes screw into some kind of metal used as a heat sink to dissipate heat.
The bottom example has active cooling

73
Jeff
GS01363-2.jpg
GS01366-12.jpg
s-l300 (1).jpg
 
I wired up a home brew PS (Pyramid 35A case but heavier insides) to heat the 4cx300 filaments for several hours (NOS years of storage). I measure less than 7A (just the filaments). I expected less than 6A.

Anyway, the four 2n3771 got so hot I added a fan but it still feels too hot. I can't imagine leaving it for several hours as suggested after years of storage. I'm considering doing one tube at a time. Tubes are 6v so I;m not wiring directly to transformer (>6.3).
 

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