The nice thing about the Ten Tec kit, is that it can be easily converted to
an L network tuner, if you switch the point where the pick up circuit
monitors current, and substitute a coax jack for the connection in one
original hole. That way, it can be converted back to artificial ground
service
Jim,
I will agree with you wholeheartedly, except for the RF Ground part ---
In reality, RF ground has only to do with a zero impedance reference for RF
at the frequency of operation. It can actually be up in the air (example -
at the midpoint of a dipole, normally the dipole feedpoint), or at
Hi, Bill-
Unless I am mistaken, there is supposedly a schematic available for the
MFJ-931 in Devoldere's Antenna and Techniques for Low-Band DXing.
I have the 931 and use if with my EFW, both in the shack as well as while
portable. It works well for me, plus one cannot have too many gadgets
Ten-Tec has a kit version ($59) that in my experience works even better then
the MFJ
http://www.tentec.com/Tk1251.htm
Mike, W9WIS
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At the risk of seeming to rain upon the parade, let's keep in mind that the
931 can at most provide a low-impedance path to ground. Whatever that
ground happens to be is what determines the success or failure of using
the 931.
In almost all cases, adding a simple ground connection to a station
George, W5YR wrote:
At the risk of seeming to rain upon the parade, let's keep in mind that the
931 can at most provide a low-impedance path to ground. Whatever that
ground happens to be is what determines the success or failure of using
the 931.
George is correct. The way I like to look at
Vic,
You are entirely correct - and I have long advocated thinking about the
'ground' terms separately. It should be common knowledge (but it isn't)
that one 'ground' can be at a different potential than another 'ground'. I
learned early in my hamming days because we often referred to 'chassis
That's exactly what the Artificial Ground does, George.
When you have a ground wire going to a ground stake it makes a lousy RF
ground, but it'll be a much worse one if the wire to the stake is more than
a couple of feet long because the wire is an appreciable fraction of a
wavelength at HF. If
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