[TowerTalk] balun design summary and data

[Jim Reid]

Brian wondered:

> Now the question boils down is 600 ohms enough
> choke impedance or not?

In case you missed this info earlier:

To quote Tom,  W8JI, given choke  impedance of:
"1150  ohms. That would be plenty of impedance 
for 80 meters on up, and  OK even on 160."

So, maybe 600 ohms is a bit low?

How  does he do it:

Tom went on to way:
"In my 160 meter phasing networks where space is a 
problem, I use a stack of eight 61 material cores 
(giving me about 30 ohms base  reactance with one 
turn on 160) with 6 turns of teflon coax for a Z of about
1100 ohms."

Hope this helps.

73,  Jim,  KH7M







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