Greetings,
I am busy building a classic grounded grid amp with two 4-250 tubes.
I would like to have a tuned input. I do not intend to cover the WARC bands
with the amp as yet.
I have two choices:
(1) have quite a few Amidon toroids both powered iron and ferrite.
I can get the colour rating in my ARRL handbooks. Is there a specific by
T-type I have to use or can I improvise with what I have.
(2) have some plastic coil formers with ferrite cores.
Which (1) or (2) is the best way to go and how do I proceed.
Do I have to use mica type capacitors in combination with the inductance or
can other types also work.
Thank You for any guidance
Wynand
ZS6ARF
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