13-02-2021, 04:19 PM
I doubt I could do it at 470KHz but as mentioned at 38 MHz quite easy when only using 8 turns per winding, the primaries have a 15pF cap across them plus any coupled, valve capacitance etc. Then slug tuned.
So I can not provide any passband tuning in the same can, but as I did on the vision side I could tune the input and output of each stage to provide a bit of stagger tuning when combined with a bit of added resistance to dampen the Q. But as I am only after audio here, everything will be peaked for the centre frequency. As to if it will all work, I suppose it will in a fashion. How good it works and if it suffers with video or not I will wait and see.
Adrian
So I can not provide any passband tuning in the same can, but as I did on the vision side I could tune the input and output of each stage to provide a bit of stagger tuning when combined with a bit of added resistance to dampen the Q. But as I am only after audio here, everything will be peaked for the centre frequency. As to if it will all work, I suppose it will in a fashion. How good it works and if it suffers with video or not I will wait and see.
Adrian
Learning as I go!
Youtube EF91 Valve
Youtube EF91 Valve
