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Re: [RFI] Re: [TowerTalk] Comment on Radar Engineers Model 240

To: Tim Duffy K3LR <k3lr@k3lr.com>, Tod - Idaho <tod@k0to.us>, rfi@contesting.com, Towertalk <towertalk@contesting.com>
Subject: Re: [RFI] Re: [TowerTalk] Comment on Radar Engineers Model 240
From: Alan Robinson <robinsah@engr.orst.edu>
Date: Mon, 11 Aug 2003 20:13:48 -0700
List-post: <mailto:towertalk@contesting.com>
Hi Tod, K0TO,

I have a Radar Engineers Model 240 which I use for locating noise sources on
power lines. I highly recommend it. I also have a Radar Engineers Model 250
Ultrasonic Locator. The combination can not only find the offending pole, but
usually I can pick out the noise making hardware while remaining on the ground.

I like to use my Tektronix Model TDS-210 Oscilloscope with the 240, larger
display and easier to see. I run the scope off of an Astron Model Pi-250W power
inverter. It has a remarkably accurate crystal controlled frequency. This allows
synchronization with the power line frequency.

Normally I use a two or three element beam on 144 MHz to locate the "suspect"
pole with the 240, then I use a 440 MHz 6 element yagi to verify the pole, and
finally I use the 250 to pick out the hardware item on the pole. The Model 240
really is an outstanding piece of equipment, as is the 250.

You can read a story I wrote about my locating experience in Marv Loftness' new
edition of his AC Power Interference Handbook, available from the ARRL. Marv's
book is a "must read" for information on how to locate power line noise sources.

I hope this helps you. If you have any questions, but email me.

Sincerely, and 73s,

Alan, W4LKE
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To: va3pl@cuic.ca
Subject: Re: [TowerTalk] Reverse rotation on Ham IV
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one should stay one....

that is your system common for both the directional and brake "paths"....

unfortunately my manual is not here but....

I know 4 and 8 are the motor capacitor....

so I would guess it just may be 2 and 3 that need switching....

Lift the line and put you Voltmeter on there - see which combo moves 
when you hit the directional buttons!

As memory serves its 24 volts I think


VeeAthreePL wrote:
> I think I goofed somewhere with control cables (too many connectors and 
> too many splices) to the rotor and the rotor is rotaiting the other way. 
> When I press CW it rotate CCW. It is like CW and CCW are reversed. What 
> happen if I reverse wires connected to pin 1 and 2? Will the rotor rotate 
> the way it 
> should?
> Thanks
> Andy - VA3PL
> _______________________________________________
> 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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