[TowerTalk] TH7 puzzle

[GALE STEWARD]

I agree! Check/replace the balun first. It's a lot
easier than taking down the DE and dismantling the
traps. You might get lucky!

73, Stew K3ND


--- Don Havlicek <n8de at thepoint.net> wrote:

> I'm surprised nobody mentioned the possibility of a
> balun failure.
> If you are using a balun, replace it when you're up
> the tower.
> Don
> N8DE
> 
> Steve Lawrence wrote:
> > SUMMARY response:
> > 
> > Puzzle: Intermittent Hi SWR when barefoot and down
> to QRP levels on a  
> > TH7 but only on 20m. Clears when hit with legal
> limit power and then  
> > returning to LP.
> > .
> > Signal path: rig-amp-pwr meter-ant switch-coax-TH7
> (w/BN4000 balun).
> > 
> > With rig connected directly to a dummy load, SWR
> is normal but the  
> > problem continues to appear when rig is connected
> directly to the TH7  
> > coax.
> > 
> > Others have had similar experiences narrowed down
> to the only 20m  
> > unique part of the TH7's DEs: the clamp on the
> element tip and / or  
> > the far end of the 15m trap. Cured by tightening.
> > 
> > Looks like a trip up the tower is called for.
> > 
> > TKS to: K4SAV, W4EF, N2TK, K1IR, N8CC, WA6TLA,
> W5AH and anyone else I  
> > may have left out.
> > 
> > 73 - Steve WB6RSE
> > _______________________________________________
> > 
> > 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
> > TowerTalk at contesting.com
> >
>
http://lists.contesting.com/mailman/listinfo/towertalk
> > 
> 
> 
> _______________________________________________
> 
> 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
> TowerTalk at contesting.com
>
http://lists.contesting.com/mailman/listinfo/towertalk
> 


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