Help me calculator OPT for 807, 6C4C tubes.

[invalid]

I want DIY OPT for 807 Tube, but I can't calculator number turn, wire size,....
I have FE 32, dim 4cm.
Zin range 2,5k to 6k.
Zout is 4Ohm, 8Ohm.
Please help me. In future, I use 6C4C tube.

 

[Yvesm]

This should help:

http://www.dissident-audio.com/OPT_da/Page.html

Yves.

 

[invalid]

Thanks very much.
You can give me diagram for it? I have Fe 32, but I don't find this in list.
ex: I want OPT is:

Zin=3100 Ohm
Zout=8 Ohm.
Consequently: Sec turn? Pri turn? and turn in sesion.

 

[Yvesm]

Hi ,

What is FE32 ?
Gimme some physical data or a sketch.

Yves.

 

[cerrem]

WHat operating conditions, voltages are you using on the 807??
Is this TRIODE wired???

Chris

 

[invalid]

Sorry for my English.
This is my Fe:

 

[invalid]

Sorry for my English.

This is my Fe:

 

[invalid]

and my Scheme, sorry, I don't have scheme image, I draw by WORD.

 

[Yvesm]

Hi,

Your iron size is very close to the "european" EI96B.

You could start this way.

Yves.

 

[invalid]

Thanks very much. If I want change values Zin to 3100 Ohm then power is decrease. But I can use for 6C4C or 6L6 in the future, It's correct?

 

[Yvesm]

Thanks very much. If I want change values Zin to 3100 Ohm then power is decrease. But I can use for 6C4C or 6L6 in the future, It's correct?

Yes, but consider tying the first and the last primary sections in parallel (those who have 537 turns), and then in serie with the middle one (1075 turns) the neat result will be a 1600 turns primary.
That being (2149 / 1600) = 1.34 : 1 of the original turn ratio or, squared 1.8 : 1 impedance ratio.
And 6000 / 1.8 = 3333
Very near of your target !

So you obtain your dual impedance OPT

Yves.
You may also imagine other primaries combinaisons