In this one am using exactly beyer 1:10
I used them in several microphones, LDC tube and FET and FET SDC.
Great transformers!
I had problem with one of these 1:10 - very weak low end response.
I just demagnetised it and work as it should be.
For output cap try to find MP.
Why E80F?
It's clean as hell, comparing even to the EF806 it's much more quiet.
Since it suck more current, circuit behaves differently so it's hard to make true A/B comparison.
First impression is that the tonal balance is much more better also
My circuit is optimized for that tube and transformer.
If you want, you can use complete schematic, but probably you will need to increase value of R9 in PSU or use lower AC transformer.
Am using selenium rectifier so there is higher voltage drop on it.
With silicon rectifier you can get up to 10V higher voltage.
For capsule polarisation voltage you will need to tweak R3 and R10.
All depends on which capsule it be and what headbasket.
My headbasket boost frequency range from 3kHz, where the capsule have a bump, that's why i choosed 50V polarisation voltage. If it will be more flat i will go higher with the voltage.
Also value of cathode resistor is crucial!