1 piece bridge rectifiers - whats inside?

[Naysayer]

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

 

[Captain Kilowatt]

Yeah a bridge rectifier is just a common package with diodes inside in various configurations. The high voltage rectifiers actually have several diodes in series to achieve the HV rating.

 

[AudioShockwav]

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

 

[Enterprise312ok]

I have an old one made with diodes on a board at the shop I will get a picture of it next time Im there

 

[Naysayer]

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).