[TowerTalk] TH7 SWR trouble + TH6 to TH "2.5" conversion

[markku.a.oksanen@nokia.com]

> Hi,
> 
> Having finally invested in a Bird 43 I am a bit mystified with my TH7.  It
> is at 145 feet or so and should be properly put together however the 10
> meter SWR is 2 @28.000 and 1.4@28.6  at the bottom end of the cable (160
> feet of RG-123). Equally 15 meters is around 2 at the lower end.  20 is
> fine.  The antenna is in the "DX" settings.  Now the issue:  I have a
> K1TTT 6 turn coax balun up there with about 2.5 inch pigtails to those
> funny curved aluminum things that should go to the manufacturers balun-
> any guesses what the correct length should have been to make this work or
> is there an other  problem here?  How sensitive is the TH7 feeding harness
> for the way the wiring, position of and so on is?  I would rather ask
> before going up there on a wild goose chase...
> 
> Second- has anybody turned a TH6 to two element beam such that you use the
> driver and the "reflector cell" on the back of he beam?  Equally well I
> could do the director end.  Dimensions?  Simulations?
> 
> 
> Thanks
> 
> Markku
> OH2RA
> markku.a.oksanen@nokia.com

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