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@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@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@contesting.com
>
http://lists.contesting.com/mailman/listinfo/towertalk
>
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
_______________________________________________
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@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|