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Old July 1st 07, 03:21 AM posted to rec.radio.amateur.antenna
Hal Rosser Hal Rosser is offline
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First recorded activity by RadioBanter: May 2007
Posts: 97
Default MA5B Newby's misunderstand of Beams?


"mike" wrote in message
oups.com...
Please e-mail me directly if you think you know what my problem is and
how to resolve it. I have just installed an MA5B Cushcraft Mini-Beam
and all seems fine. SWR's are normal, Coils are installed
correctly...all is well except a major noise increase that rides along
with the signal received. Like hearing a weak station and switching on
a receive amplifier (Bringing noise with the signal) I believe in my
heart I have constructed the Beam IAW the Cushcraft manual. Coax is
new and connection are correct. Could this noise be because of the
matching network being bad. I switch over to my Dipole on the ground
and the signal changes from static voice to clear audio right down to
absoloutly no noise when transmitter un-keys. Very frustrating. Help
and hilfe bitte!
Mike KB3IUL

May be a loose connection somewhere.
Just to find out - hose it with a water hose and see if any change occurs to
the good.
If the noise is reduced from a good soaking, then one of your connections
may benefit from from some penetrox where aluminum - to - aluminum joints
exists. A good rub with emery-cloth then the the penetrox / no-alox
(purchase in the electrical section at Lowes or Home Depot.