[TowerTalk] Any BN-86 Balun Replacement Suggestions?

[Pat Barthelow]

> From: k0wa at swbell.net
> 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
aa6eg at hotmail.com
http://www.jamesburgdish.org