[TowerTalk] Hygain rotor controller question

[Al Kozakiewicz]

Thanks all. The manual I was using shows an address in Starkville, so I guess it refers to an MFJ era device that is a different design even though it looks exactly the same.

Al
AB2ZY

-----Original Message-----
From: Wayne Kline [mailto:w3ea at hotmail.com] 
Sent: Sunday, November 22, 2020 11:08 AM
To: Al Kozakiewicz
Cc: towertalk at contesting.com
Subject: Re: [TowerTalk] Hygain rotor controller question

Al.  The push pull switch is for calibration the full scale meter to your IR on your specific cable run.  You push it in call  switch button and turn it to adjust meter full scale 

 Wayne W3EA

Sent from my iPad

> On Nov 22, 2020, at 10:08 AM, Al Kozakiewicz <akozak at hourglass.com> wrote:
> 
> I've had a "new" (never used) HAM IV and controller  I bought on eBay a decade ago. Recently put up a short tower with a C3, 6M and 2M yagis and decided to use it. The back of the controller says Telex/HyGain, so I assume it is fairly old.
> 
> Worked on the bench. Worked outside after I got the tower and antennas assembled. Brought it inside, did the final wiring and the position meter was stuck at full scale. Shorting the rotor pot legs to ground did not change the meter position.
> 
> Long story short, I took it apart and brought it to the workshop to diagnose, figuring it is something simple (there is nothing to the meter circuit). Poking around, I notice there is a switch on the calibrate pot that is activated by push/pull and is not mentioned in the manual I have or shown on the schematic. I had apparently pushed it while wiring the back panel. Pulling it out restored the operation of the meter circuit.
> 
> What the heck is it for?
> 
> Al
> AB2ZY
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