[TowerTalk] The Care and feeding of an 80 meter Zepp

[Justin Burket (KL1RL)]

The tuner in this application is a LDG AT897.

Also just to make sure I understand the advice properly here is the 
modification plan.

Take the feed line from the 300 ohm twin lead and stick it right in the 
center conductor of the coax connector on the tuner.  Take the other 
side of and ground that sucker!  Many times, as much as I can.  Ground 
the radio to the water pipes.  Tie a nice ground into the metal railing 
outside my shack window (opposite side of the house).  Ground to the 
cat.  Ground it!

Do I got the right idea?

Thank you very  much for all your replies.  I have been very impressed 
with the level of "professionalism" in this group of ham's.

Justin

On Mar 28, 2005, at 8:40 AM, Jim Lux wrote:

> At 08:17 AM 3/28/2005, Tom Rauch wrote:
>> Ohh, OK, a shunt C. I missed that. My instincts tell me we
>> have to be careful with a shunt C when the network has a
>> series C in the output, like a T network. But maybe I'm
>> wrong.
>
> Most autotuners (or, at least, the SGC and LDG varieties) seem to use a
> shunt C and a series L, with the shunt C switched to either end, 
> depending
> on the relative magnitude of the feedpoint impedance of the antenna 
> being
> matched.
>
>
>
>>> Maybe I wasn't clear here either:  "drop the counterpoise"
>>> does not mean "omit the counterpoise".  It means connect
>>> a wire to the cold end of the counterpoise and let it drop
>>> vertically from there to the ground.  BTW, when your
>>> antenna impedance is 1000's of ohms, you don't need much
>>> of a counterpoise, especially if you feed the
>> antenna/counterpoise
>>> through a balun to keep RF out of the shack.
>
>
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Justin KL1RL
Fairbanks AK


Justin KL1RL
Fairbanks AK