[Elecraft] Using the Antenna Tuner in the XPA100

[Fred Jensen]

One would think so, but maybe strangely, there is no sign of any RF on 
the coax at the rig connection.  My coax run is 100' of RG-8 laying on 
the ground.  Because of a walkway made of pavers between the house and 
autotransformer on the fence, it runs under the antenna along the fence 
to a conduit under the walkway, and then back next to the foundation, 
still on the ground, to a 1 1/2" entrance weather head and pipe into the 
house just above the floor level, and then about 6 ft to the rig.  The 
autotransformer on the fence has a ground screw with a wing nut but 
nothing is connected to it.

For awhile, I just had a 25 ft coax run laying across the walkway and it 
all behaved the same.  Wife "convinced" me to get the black hose off the 
pavers. [:=)  I expected I'd have to choke the coax at the house 
entrance [and maybe a lot more], I have no idea why I didn't need to.

Full Disclosure:  While I've spent a number of years in college, have a 
couple of degrees, and am comfortable with the mathematics of RF, I'm in 
my 70th year with a license and my usual approach to anything is the old 
school, "try it first."

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Jim Brown wrote on 6/30/2022 11:52 AM:
> On 6/30/2022 11:07 AM, Fred Jensen wrote:
>> The outer surface of the coax shield to the rig forms the 
>> counterpoise [i.e. the "other side of the antenna"].
>
> While this does work for transmitting, it also is a recipe for "RF in 
> the shack." In addition to "lighting up" the shack, the counterpoise 
> does not stop at the station -- it continues on every wire connected 
> to the station, including power wiring. At a minimum, this demands 
> serious bonding of everything in the station.
>
> 73, Jim K9YC
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to k6dgwnv at gmail.com 



-- 
This email has been checked for viruses by AVG.
https://www.avg.com