If I remember correctly, the base K2 came without the ground screw.
Its been a long time. I think the ground screw came with the ATU.
The K1 doesn't have a ground screw, even with the ATU. I am confused
about the use of an RF ground with a balanced antenna. One of the
advantages of a balanced antenna, verses an antenna that works with a
ground such as a vertical, is efficiency. If I use an RF ground with
a balanced antenna, am I losing efficiency. Especially if the ground
is mediocre? I don't want to put down 60 radials for my center fed
doublet. When I used my K1 or K2 with a battery and a balanced
antenna, I had confidence that most of the power was getting
radiated. Now I have a K3-100 with an Astron 35 M power supply and I
am wondering if that has changed. The 35 M schematic shows that the
13.8v DC terminal is connected to the 120v AC supply system ground.
This is continuous, overhead and underground, to the substation ground
mat. This doesn't sound too bad for a 160 M vertical, however, I
can't decide what effect this has on my CF doublet. Am I sending RF
all over the neighborhood on the power lines? Is this why a BALUN is
needed? Is my antenna efficiency and pattern different than when I
used battery power? If I use the doublet and a BALUN, what do I use
the ground screw for? It would be redundant to attach it to the AC
ground as this is done thru the 13.0v supply cable.
73
Rck Dettinger K7MW
On Apr 16, 2008, at 11:50 AM, Roger Stein wrote:
Yes, good RF/safety practice, to the ground post on the back of the
K2 provided for that purpose.
Roger
WA7BOC
k2 755
k3 75
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Scott McDowell
Sent: Wednesday, April 16, 2008 11:19 AM
To: [email protected]
Subject: [Elecraft] grounding K2
Hello
Has anyone ever felt the need to ground their K2, and if so, where
did you
connect the ground wire to the K2?
Thanks
Scott
N5SM
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