View Single Post
  #2   Report Post  
Old February 29th 08, 05:22 PM posted to rec.radio.amateur.antenna
Ed_G Ed_G is offline
external usenet poster
 
First recorded activity by RadioBanter: Dec 2007
Posts: 69
Default SGC coupler to Dipole feedling question



Antenna tuners 'like' antennas that are 'too long' better than
antennas that are 'too short'. That doesn't say anything about how
well that 'too long'/'too short' antenna will perform, just that the
average tuner will find it easier to deal with one that's 'too long'.
(Easier to 'cram' more capacitance into a tuner than inductance.) If
this antenna is a doublet, 'balanced', why would you need a
'groundplane'? And while I'd guess that it'll never be 'ideal', the
building is acting as a 'groundplane' anyway, sort of.
- 'Doc

(What am I not understanding about the situation?)



I don't think you are missing anything; your comments sound
reasonable to me. The building is the nearly new local firehouse HQ.
The Chief and staff have outlined very strict parameters for our antenna
location and setup. They fabricated the aluminum mast and will install
it on the side of the building per their own design. Even at that, they
gritted their teeth at the visual impact it has. No stand-off
supported open ladder line for us! We must work with this and I don't
see any feed alternative than coax. The only thing we 'may' have some
flexibility with is the length of the antenna. ( Sorry Cecil, I guess
I should have mentioned that up front ). We are limited to the length
of the side of the building, which I estimated would give us up to 40
feet of element from the top of the mast. However, in hindsignt, I
believe we could at that end point drop some additional length down off
the end for a longer antenna.... would probably give us better operation
on 75 & 80.


Ed