I don't think so. I think they are "tape wound cores", useful for low
audio frequencies.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 20/01/2020 17:30, Jim Kinney wrote:
I have 3 of these, 3" OD, 1.5" ID, 1" thick. I can see the steel
laminations where the paint chipped off of one of them. They are also
heavy
Are these of any use for RF? I'm converting an SB-220 to 160 and
thought about one of these for thetank circuit till I saw the core. Now I'm not sure.
Thanks & 73, Jim WE4S
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