[TowerTalk] TH6-DXX Band segment settings

[john at kk9a.com]

The BN-4000 that he has is a 4KW balun.  I would not use a Hy-Gain BN-86 for
anything.  I would worry more about the traps handling QRO, especially if
high power digital modes are used.  There was a burnt TH7 trap on the wall
of the P49V station that was damaged from P49YL operating RTTY contests.

John KK9A


Richard Karlquist N6RK wrote:

I see you dug up one of my old posts.  The only thing I would add to
that post is that is that anecdotal reports of using a tuner to extend
the bandwidth of such Yagi's may say "it seemed to work fine" only
indicate that no effective tests were done to measure it.  Consider
this:  the TH6DXX has 6 or maybe 7 dB gain over a dipole at best.  Using
a tuner, the gain will never be less than a dipole.  So it will work as
well as a dipole.  For casual operation, that may work just fine.  It's
only down 1 S unit. 

Regarding baluns:  The TH6 was designed when hams were limited to 1kW DC
input equivalent to 600W RF out on a good day.  Using 1,500 W out may
blow the balun up, especially if you have high VSWR.  Recommend you make
a homebrew balun as per K9YC's cookbook.

---
Rick Karlquist
N6RK