A 2.4" type 43 toroid from Mouser, etc. wrapped with the correct turns of
coax from K9YC's site. About $4 and change.
The BN-86 is a voltage balun and I blew 2 of them, once in the 60's on a
TH-6 and again in 91 on another one. Both times with 1200W; they dont like
a high VSWR.
Carl
KM1H
----- Original Message -----
From: "Gary Smith" <Gary@ka1j.com>
To: <amps@contesting.com>
Sent: Monday, March 17, 2014 6:09 PM
Subject: [Amps] Triband balun
Rehabbing my father's old TH3-Mk3 tribander from the 80's. The balun
he had on it was a 1:1 bal/unbal BN-86. As I'll be using an amp with
it, something more robust is probably a good idea. I was thinking 10
loops of coax at the antenna would do the job.
Any suggestions for a better alternative that will hold up in a RTTY
contest?
Thanks,
Gary
KA1J
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