In article , "Antonio Vernucci"
writes:

Can you tell me how is the transformer built (e.g. secondary over =
primary, or physically separated windings)? Do you see any air gap in =
the lamination?

Thanks for picking up on this thread. The two windings are physically
separated, but I didn't see any air gap. The laminated iron core is pretty
heavy. Since the whole PS is rated at 8 KV at 5 mA, it must be good for 40
watts. A lot of modern xformers are wound separately form the primary for
safety isolation.

I am trying to determine whether the secondary is lightly coupled to the =
primary. Taking into account the scope of the equipment, this could have =
been done to limit maximum power transfer onto the secondary.

Yes, I can see that a magnetic gap or other loose coupling would protect the
secondary winding from burning up if a diode or cap shorted. And this would
also make it possible to resonate the secondary. You may well be onto
something here.

BTW, I replaced the original .011 uF cap with what amounts to .0094 uF. I
think I remember the decimal place right.
Tnx es 73, Mike K.

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