[TowerTalk] Topband: RFI

[Wm. Freddy Curtis]

John,

I had a similar problem with the Yaesu G-450XL controller.  I had got an
Ameritron-811H Amp into an Inverted L 3 ft from tower.  I fried the
controller.  Got a used controller off of e-bay, however I forgot one
evening and fired up the amp and puff....  I bought a MDS Ham Controller
(about 1/2 the price of a Green Heron) and it has a JST connector.  I put
multiple chokes and ferrite beads in various locations on the rotor cable,
with three or four turns, Also got some snap-on chokes from Radio Shack with
multiple turns, but still have the RF. I purchased the toroids & beads from
Palomar Engineering.  I now simply keep the connector to the controller
unconnected when I'm on topband, it is easier now with the JST connector as
the Yaesu controller had the terminal strip on back.  The MDS Ham unit is
more "forgiving" about RF than the Yaesu controller.  

 

Also check out responses to my previous posts here on TT RE: Yaesu G-450XL
RF problems.  Hope this helps, and good luck!

 

73's,

Freddy Curtis - KC4GUG

 

 

 

-----Original Message-----

From: topband-bounces at contesting.com [mailto:topband-bounces at contesting.com]
On Behalf Of John

Sent: Tuesday, December 30, 2008 12:48 PM

To: topband at contesting.com

Subject: Topband: RFI

 

Hi all,

 

Can anyone suggest a toroid and number of turns to choke out 160 meter QRO
from a Yaesu control cable? The RF on the cable's wires is not good for the
control box!

 

Thanks to all,

 

-John, N9RF

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