"Tom Ring" wrote in message
.. .
Yuri Blanarovich wrote:

There is another potential problem if feeding two amps to two antennas
that are reasonably close: RF from one antenna is induced into the other
antenna, gets fed into the amp and causes some interference (mixing ?)
that shows up as a raspy signal.
Tried it, and heard it on another station attempting the same setup.
It seems that it would be easier to control the phasing at the input of
the PAs, but the above effect messes it up, unless antennas are widely
separated and they do not "feed" each other setup.
So, it appears that it is better to use one bigger amp and use proper
phasing to feed the two or more antennas.


Well, the expert, or should I say, the new GURU, has spoken. He seems to
know all about this complex subject.


Aaaah, here chimes in another W8JI worshipper, who can not read posting,
understand it and reply intelligently, but resorting to snotty, personal,
pathetic remarks. You may have noticed that I do not take crap and respond
in kind.

I know I will never try this again, as my previous efforts, which seemed
to work, could not possibly have done so. Obviously Wilkenson hybrids are
useless, likewise any ring hybrids, and all other methods of
splitting/combining a transmitter feed.


READ IT AGAIN carefully, I have not say that "Wilkenson" (learn spelling)
hybrid would not work or anything about dividing - combining signals. I have
noted that if TWO amplifiers are fed into TWO (separate) antennas that are
in close proximity (mutual impedance at play) then the signals from the one
antenna get picked up by the other antenna, fed back to the amplifiers and
cause distortion that manifests itself as a raspy CW tone or SSB modulation
on the air. I also mentioned that possible remedy is to separate the
antennas in a such way that there is no significant signal feedback between
them. Like you could have one amp feeding EU antenna, and another one
feeding SA antenna, separated properly, fed from the same TX and using
splitters, to satisfy the impedance match between the TX and AMPS.

Sorry guys, they won't work. Yuri said so.

I didn't say such a thing, I brought up potential problem to situation
(feeding 2 amps to 2 ants) in question and offered possible solution. I did
not even mention hybrids or ways of phasing the gizmos, where did you get it
from, private conversation with the other Tom? You got the GURU thing mixed
up. I do not play GURU on Internet by publicizing "wisdom pages" like W8JI
does, I would chime in with help when I see the need for it (and have time)
or when I see gross crap being paraded as "gospel".
Thank you for showing your feathers and displaying your depth!
Your picture would look pretier if you engaged in technical, civil
discussions, rather than that "W8JI thing".


tom
K0TAR


Yuri Blanarovich, K3BU, VE3BMV etc.