Quote:
|
Originally Posted by Dave Platt
Based on what I see in the manual, it appears to me that the
random/long-wire attached to ANT4 is simply being driven against your
station ground. It's an unbalanced feed, just like the other three
ports.
It really seems to be intended for just what they say - receiving -
where the impedance mismatch between the wire and the rig/tuner isn't
all that important.
A vertical wire cut to approximately 1/4 wavelength, plus a
counterpoise wire cut to approximately the same length and attached to
the tuner's ground, could give you an impedance in the necessary
range. However, you may run into various "RF in the shack" problems.
--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads! |
It does seem kind of pointless (accept for SW receiving) to have a long-wire antenna port on a ham-band tuner. Is there any reason I could not just wire in a short length of co-ax with a female UHF connector (center to antenna #4 and braid to ground, of course) or mount and wire in another S0-239 connector and have 4 working unbalanced co-ax feed lines coming out of the shack? Minimizing unshielded feedlines minimizes stray RF problems, right?
So what was ICOM's thinking in designing this port the way they did, including front-panel push-button actuation, when all the other ports are automatically selected by band? What would be the best way to take advantage of this scheme setting in up my transmitting antennas?