"Irv Finkleman" wrote in message
...
snip
I should not have any hot
RF burning my lips from the mike. Checking it with my lips is not what I
call
a desireable means of testing, and being single I cannot call my wife to
test it
for me. I'd like to find a better way and hence my questions.
Since you started this whimsical line of reasoning, you dare not object:
Buy a plastic microphone. Har-har-HAR-dee-har-har! [Thanks to Ralph
Kramden]
But seriously folks ...
You do have a coaxial cable from the radio to the tuner. Choke the
bejabbers out of it. Either wind the coax itself into one or more physical
coil(s) of the right proportions or use the W2DU method.
This will be useful for the former approach:
http://www.karinya.net/g3txq/temp/choke_impedances.png
It illustrates that no single coil really does it.
.... and this for the latter:
http://www.qsl.net/ta1dx/amator/W2du.jpg
Although your application doesn't involve using beads as a balun, per the
illustration, the broad approach is the same: blocking common mode currents.
"Sal"
who chokes his cables and gets no shocks
I believe (according to what theory I have learned) that the tuner chassis
would
be hot with RF, with the amount of RF becoming less and less as the
counterpoise
wire approaches the proper length. If this is true would a simple RF
sniffer tell me?
I can rig one up fairly easily.
OR - What would I be looking for using my MFJ-259B SWR Analyzer? I expect
what it would show readings similar to a dipole with resonance at the
operating
frequency and an impedance (resistive) of somewhere in the order of 60
ohms.
plus or minus -- is this a correct assumption?
OR -- does anyone on the group have any suggestions that will tell me when
the
system is properly adjusted -- the simpler the better!
Once I have found how to do this, I can put tape markings on the roll of
counterpoise wire to show the appropriate length for each band or narrow
band of frequencies in which I will be operating.
I have already tested the hole -- it is just a little less than 1/4 inch
diamater,
but that seems to be enough to let both sidebands through -- I carefully
tested
that using AM which proves that two sidebands can fit through the hole at
the
same time, which allows me to further assume that either the upper or
lower
sidebands should squeeze through easily! :-)
Thanks in advance for any assistance you can provide in this matter.
Irv VE6BP
On the air finally but afraid to get to close to the mike! I may have
to use rubber gloves and teflon lip gloss!