[2359glenn]

Using the same 5 volt rectifier like the EL3N yeah?

Yes it will be in the center of the power transformer.

 

[UntilThen]

Yes it will be in the center of the power transformer.

That's a relief to know because I just won this Gec U52 cheep !

 

[2359glenn]

Yes you can use that tube.

 

[UntilThen]

I have the GZ34 and U52 rectifiers. That will do plus if you give me a 3DG4, that's 3. Should be sufficient.

 

[UntilThen]

The OTL amp is sounding so good now, it would be hard for the EL12 amp to better it. At most it's a different tone, that's my guess. It will be a very interesting variation though.

 

[FunctionalDoc]

Yet another brand. It's in German. Anyone knows German? Do they have stock?
https://classic-tubeshop-kunisch.de/EL12-spez

Google translate said out of stock.

 

[2359glenn]

I have the GZ34 and U52 rectifiers. That will do plus if you give me a 3DG4, that's 3. Should be sufficient.

No 3DG4 voltage to high for it. Tube should have a PRV rating of at least 850 volts or higher that means no GZ32 it will blow up.
I already had someone try to use a GZ32 in a 300B amp and it blew up and blew the fuse in the amp.

 

[UntilThen]

So GZ34 and U52 ok? Can I use GZ37 and 5U4G?

 

[2359glenn]

Yes all these tubes will be fine.
5U4 PIV = 1550 volts
GZ34 PIV = 1500 volts
GZ37 PIV = 1600 volts

 

[2359glenn]

Oh
U52 = PIV 1430 volts

 

[2359glenn]

Let me try to explain this made easy.
Output of power transformer 425 sine wave so it goes +425 then - 425 now the filter capacitor charges to 425 and the sign wave goes to -425.
The rectifier blocks this but the voltage across the rectifier 425 on the capacitor plus the 425 it is blocking or 850.
That is a simplified exclamation.
So the PIV is twice the operating voltage.

 

[UntilThen]

Oh
U52 = PIV 1430 volts

So U52 will work right?

 

[2359glenn]

Get a nice GZ37 I like them

 

[UntilThen]

I just got a nice GEC U52. I need to know if it is safe to use it.

 

[2359glenn]

Yes the U52 will work