Not sure how you have the mains wired to the control box, but I had the same
problem with mine wired for 110 vac and the chassis of the control box was
wired to the safety ground in the house wiring.
The schematic on page 28 of my manual shows a wire (green in the United
States) running from the center pin on the a.c. plug to chassis ground. If
you lift this wire from the chassis and the hum goes away you do not have a
good enough connection between your tower (the rotator head is grounded to
the tower) and your power company ground.
I do not recommend you leave this saftety ground disconnected as it could
leave you with 220 vac between the rotor wires and your tower.
de Paul, W8AEF
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Manoj Agarwal
Sent: Wednesday, February 09, 2005 3:12 AM
To: towertalk@contesting.com
Subject: [TowerTalk] HAM IV
Hello this is vu2wap.
I have just installed a new ham iv on my tower.
I observe a deep humm when I am transmitting and turning the antenna at the
same time while I hear my own audio from the radio on my head phones.
Any suggestions to get rid to the hum ?
Thanks in advance.
Regards
Miku
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|