Re: has anyone used an mfj artificial earth?


"G1LVN" <gareth.paley@xxxxxxxxx> wrote in message
news:jZ6dneRTxcU_EmjYRVnyiAA@xxxxxxxxx

"Malkavian" <a4bedaser@xxxxxxxxxxxx> wrote in message
news:hSdJh.17860$Fg4.10951@xxxxxxxxxxxxxxxxxxxxxxx
Hi. purchased one cheap recently because I live in a tower block. It's
the
mfj-931 and it's not playing ball. I hooked it up to the earth post of my
atu and i plugged a length of cox in the other end of the MFJ as a
counterpoise. Am I doing it right? When i key up, nothing happens on the
ammeter. I even adjust the sensativity but to no avail. I e-mailed MFJ
and
they never responded.

just hook up the broad from the coax. I'd be tempted to connect this up to
the water pipe as well.

The cor of the coax you mean? I read something about the AG not being a
substitute for dc ground. That certainly might explain why ther is no
cuttent drawn through it.


From User manual:
"To obtain maximum RF ground current for a low impedance RF ground,
alternately adjust the two controls on the front panel labeled
"INDUCTANCE"
and "CAPACITANCE". Turn the INDUCTANCE control first until the highest
amount of current can be registered on the built-in AMMETER. Then adjust
the
CAPACITANCE control to increase the amount of RF current. Try several
inductance setting for best results. What if the needle goes off the scale
or doesn't move at all? Then the sensitivity of the Ammeter needs to be
adjusted. Turn the SENSITIVITY control until the needle is in the middle
of
the scale. Then readjust the INDUCTANCE control for the highest amount of
RF
current and use the CAPACITANCE control to achieve maximum RF current. If
the needle is still off scale or zero, readjust the SENSITIVITY control
and
repeat the tuning process until maximum RF current is achieved. After
maximum RF current is reached, retune your antenna tuner for minimum SWR.
You may need to retune both the MFJ-931 and your antenna tuner several
times
to achieve best results".



Yes. I did that. mind you i didn't do much with the inductance range. IIRC
the inductance is a multi tap switch and the capacitance in a vairable cap.
I shall play tonight.



HTH




.

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