'T'was asked,
"I'm looking at alternatives to rebuild a tank circuit in a 1.5kw HF amp.
I'm interested in using toroids rather than air-core coils and with that, a
different (non-tapped, separate coil for each band) switching scheme. I've
seen (2" T-200 series) toroid cores used in 80/160 sections of Alpha 76
series and have heard they're used elsewhere, but I don't know what I should
consider in a homebrew application, other than dielectric tape to prevent
arcing through the core. Does anyone have any references or other info I
could look up?"
Tks,
73 Dave WB0GAZ
Hi Dave,
I use a 4" by 1 1/4" T-400 powered iron core as L-1 in my 160-meter
Pi-L tank along with a stacked pair of two T-200 as L-2. Runs cool at 1500
watts CW all day. I use the HV glass tape recommended by Amidon and others
to wrap the cores with.
73, Roy K6XK Iowa
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