> From: firstname.lastname@example.org
> Subject: Re: [TowerTalk] Any BN-86 Balun Replacement Suggestions?
> I have replaced the BN-86 with a 1:1 balun from Radio Works. Worked OK. I
> think it was rated at 4 KW. Typical SWR curve after replacement. Just used
> hose clamps to attach it to the boom.
> You could also use about 10 turns of RG-8 (or what ever type) in a 10"
> circle. I have done that in the past too and works OK.
That is what I did for a replacement balun on the 6.2-30Mhz Log Periodic. The
MFJ 259 manual shows a neat way to check for any unexpected series (low
impedance) resonances in the hand wound coil, which can happen at certain
frequencies, if you need it to serve a very wide range. I used a PVC form
about 8" and solenoid wound the turns and slathered them heavily with GE
silicone seal to hold a good cylindrical shape. Its still up, feeding the LP,
some 11 years later...
All the best,
Pat Barthelow (916) 315-9271
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