Express triple diode on pin 3 output tube

[DaveWell]

Hi every one !

In the Trainwreck express, ther's 3 diode ( 1N4007 or UF4007)
from pin 3 to ground.

I'M not sure what is that use for.

And what is the different Wattage between 6V6 and EL34 ?

Noob Question !

Thanks

[Bob S]

Hi Dave,
The diodes are for protection against spikes & such.
Protecting those valuable NOS EL34s.
Some of us don't use them.
There was a thread about some hash sounds caused by them.
6V6s or EL34's - volume wise there is a small difference.
22w against 35w.
EL34s give more punch, for me anyway.
Bob

[DaveWell]

Thanks Bob !
I plant to built one some day...

I'm looking for transfo spec, whant to use Mercury Magnetic.

Eanyone try a Tube rectifier instead on diode ?

[Kassie]

Thanks Bob !
I plant to built one some day...

I'm looking for transfo spec, whant to use Mercury Magnetic.

Eanyone try a Tube rectifier instead on diode ?

The diodes do the job quite well.. I won't go for the tube. The sag or squash will be too much.. the express allready has that sagging dynamic with high gain.