OK, thanks! I'll pull her down and try that (obviously I missed this in
On the analyzer issue, I wasn't as much looking at the impedance as I was
the SWR. Also, on the 10M band (since 29.35 MHz is the only resonant
point still in the ham bands), the SWR on both my TS-440's internal
meter, and on the tuner I've been using, show a 1.6:1 match with my
homemade coax balun (a 1:1 balun). While that'd be close enought for me,
once tuned correctly, I'm assuming I'll need the 4:1 balun at that point.
I'm also not sure the original balun is good at this point.
Thanks for the hint. I'll get back to 'yall....
On Tue, 9 Aug 2005, David O Hachadorian wrote:
> Connect a dc ohmmeter between the 10 meter and 15
> meter trap capacitor outer tubes on each element half.
> After correcting for ohmmeter lead resistance, the
> total resistance should be less than 0.5 ohm. This
> one measurement tests all of the critical connections
> on each element half.
> Then connect the ohmmeter across the two halves of
> the rear driven element. Once again, it should read
> less than 0.5 ohm. This one measurement tests all
> the connections through the phasing straps, matching
> assembly and balun.
> That's a 4:1 balun on there, so when you fed the antenna directly with
> coax, the swr went very high, right? Try using a real swr bridge instead
> of the analyzer. Make sure the antenna is high enough during these test
> Dave Hachadorian, K6LL
> Big Bear Lake, CA
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
> questions and ask for Sherman, W2FLA.
> TowerTalk mailing list
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list