AZ1 PSU

[merlin el mago]

AZ1 only have two anodes & two filament pins.

 

[Eli Duttman]

Felipe,

It's time 2 choose. Either you use a "full wave" doubler made with 2 SS diodes (Schottky highly preferred) or you build a hybrid 2 stage half wave multiplier, with the AZ1 (plates in parallel) and 1 SS diode.

 

[merlin el mago]

I want to try the AZ1 but I'm not sure how can be done, could you post or link schematic?

TIA
Felipe

 

[DF96]

You need two rectifiers. An AZ1 is one rectifier, so you need two of them or one AZ1 and one other rectifier. What else do you need to know? You want to use an AZ1, so why not find a voltage doubler circuit and put an AZ1 in it? This is DIY audio, not GSETDIFY audio.

 

[merlin el mago]

DF96 your contribution don't help me and only confuse me more. Try to undertand I'm not English and English language is not my native language adding my low level of electronics.

 

[merlin el mago]

All you need is an AZ1 with two separate cathodes, or two AZ1.

Post 17 is not a voltage doubler. Some people might call it a voltage halver.

Forget about all you have seen and read about resistive CT for heater supplies. This is irrelevant to your current problem. You don't need a CT, and a pair of resistors don't really provide a CT anyway.

Duncan Amps PSUDII names as voltage doubler

 

[DF96]

Sorry for confusing you. I don't know why you want to use an AZ1, even though you seem not to understand how to use an AZ1. You decide to use AZ1, but then we find or design the circuit for you?

 

[Eli Duttman]

The hand edited schematic should get you going.

 

[merlin el mago]

Thanks Eli.

 

[merlin el mago]

Eli the ground is in the AZ1 side? Both caps 33uF right?

 

[stocktrader200]

I got 151v from 35Vac secondary from pioneer sx780.
I regulated that down to 133v to drive 6922 at 6ma per triode. Heater works perfectly with 2.2 ohm resistor from 7.5v panel lamp winding.
2 x 10uf / 200v caps (-) pin of bridge doubler tied to positive output rail. 68 uf / 200 v Filter cap.
no noise from power supply. 6922 does not suffer from AC on heater like ECC88

 

[Eli Duttman]

The paralleled AZ1 plates get grounded. Both caps. are 33 μF.

A Schottky as the SS diode insures that switching noise will not be a problem.

 

[nigelwright7557]

You can double DC volts using this circuit.

An externally hosted image should be here but it was not working when we last tested it.

 

[merlin el mago]

The paralleled AZ1 plates get grounded. Both caps. are 33 μF.

A Schottky as the SS diode insures that switching noise will not be a problem.

Which Schottky?

TO-220 Diodos Schottky de Carburo de Silicio | Farnell element14 España

TIA
Felipe

 

[merlin el mago]

The paralleled AZ1 plates get grounded. Both caps. are 33 μF.

A Schottky as the SS diode insures that switching noise will not be a problem.

Which Schottky?

TO-220 Diodos Schottky de Carburo de Silicio | Farnell element14 España

TIA
Felipe

 

[Eli Duttman]

Which Schottky?

Cree C3D02060F

Don't forget a choke of several H. and a good sized reservoir cap., after the multiplier. A fair amount of 50 Hz. ripple will be present that should be suppressed.

 

[merlin el mago]

In place of Cree is ok Wolfspeed? I think is the same, right?

C3D02060F WOLFSPEED, Diodo Schottky de Carburo de Silicio, SIC, Serie Z-Rec 600V, Único, 600 V, 4 A, 4.8 nC, TO-220-F2 | Farnell element14 España

Choke to be used is 10H 200mA 10 ohms.

Is enough 220uF after the choke as reservoir cap?

 

[Eli Duttman]

In place of Cree is ok Wolfspeed? I think is the same, right?

Yes.

Is enough 220uF after the choke as reservoir cap?

Yes.

 

[merlin el mago]

That's all Eli, thank you very much for your kind help.

 

[awkwardbydesign]

Buy a new transformer. You seem to make lots of problems for yourself!