using tube Rectifier (5Z4) instead of diodes

[pc1093]

Hi all,
I would want to use a 5Z4 as a rectifier.

1. Does the first  Reservoir Capacitor need to change 4.7uF/450V ?
2. need I add a resistor before the chock? how much is it?
3. Does any other resistor value need to change?
thank you

[Stuff4bikes]

Someone much more knowledgeable will chime in but......

Those cap values arent common to tube rectification.....I would guess the first would be 47uf our something close.....
And you will need a transformer with a 5v winding to run the 5Z4....

[pc1093]

Someone much more knowledgeable will chime in but......

Those cap values arent common to tube rectification.....I would guess the first would be 47uf our something close.....
And you will need a transformer with a 5v winding to run the 5Z4....

https://www.radiomuseum.org/tubes/tube_5z4.html
I find that the first Reservoir Capacitor max is 40uF.
I have another 5V transformer to supply the heater.

[Stuff4bikes]

Someone much more knowledgeable will chime in but......

Those cap values arent common to tube rectification.....I would guess the first would be 47uf our something close.....
And you will need a transformer with a 5v winding to run the 5Z4....

https://www.radiomuseum.org/tubes/tube_5z4.html
I find that the first Reservoir Capacitor max is 40uF.
I have another 5V transformer to supply the heater.

Is there a reason you want a 5v rectifier? Why not a 6v rectifier and save the space.

[sluckey]

I would want to use a 5Z4 as a rectifier.

Why? What do you expect to gain? I see zero benefits of using a tube rectifier in a tube preamp.

[pc1093]

I would want to use a 5Z4 as a rectifier.

Why? What do you expect to gain? I see zero benefits of using a tube rectifier in a tube preamp.

I just find a tube rectifier easy to buy.
now I find 6X4/6X5 more suitable for this.

If I use 6X5, how can i change the first Reservoir Capacitor?
For the B+ supply need 150V, what value of the resistor before 0D3 need?

[sluckey]

If I use 6X5, how can i change the first Reservoir Capacitor?
For the B+ supply need 150V, what value of the resistor before 0D3 need?

The tube chart you posted said to use a 32µF reservoir cap. I would also change the other filter caps to 32µF.

A 10K resistor should work fine for the OD3, although a single 10K 10W would be sufficient. The resistor has to drop 210V so it will actually dissipate 4.41 watts.