TAKING THEM DWN AND SENDING BAK SURE IS A pain in the ass.
these tower product always seem to ferget that aspect of their lovely
warranty policies....in my opinion the hdr300 and telex are both a pain
to deal with .... earlier on i went thru 3 of these hdr and swore i wud
never own another only to eat those words a few months ago when i
put up a k5iu rotating r55 twr....dick specs the hdr for his system so
i bot a 300A ...so far so good.....
you can get reading variations from wet connections/connectors and
rf interference as well as bad pots.....try removing the cases from the
rotators and spraying the pots with wd-40....if u can get any into them
as i recall they maybe sealed......no excuse for these pots failing so
soon.....get them to send u new pots and install ur self.....its easy to
do.....mite be able to do on the tower?? good luck
w7gg
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> From: Carcia, Joe, NJ1Q <jcarcia@arrl.org>
> To: 'smtp:towertalk@contesting.com'
> Subject: [TowerTalk] HDR-300A rotator questions (bit long)
To: <towertalk@contesting.com>
> Date: Wednesday, May 07, 1997 11:41 AM
>
>
> A few months ago, I purchased a new HDR-300A to replace an old HDR-300
> I had in service. (The 300A can be set for either North or South centered.)
>
> The new rotor system had been functioning normally. Recently, the display
> on the control console was giving me erratic readings. Finally, all
> it reads now is -99 (telling me there is a possible problem with the rotor
> potentiometer).
>
> I determined that the potentiometer's wiper (pin 6) is open. I get a
> resistance
> reading between pins 5 and 7, but nothing from pins 5 to 6, or 6 to 7. I
> get
> no reading no matter which direction the rotator is spun.
>
> Now, the old HDR-300 was sent to Hy-Gain for repair and upgrade to 300A
> status.
> When I got it back, I bench tested it, and it worked fine. No problems.
> (And yes,
> the control console was also upgraded for either North or South centered.)
>
> The now-overhauled HDR-300 was placed on a different tower, and was
> functioning
> okay for a few days. However, I now experience similar problems with this
> old 300 as I do with the new 300A. The only difference is that I get a
> resistance
> reading between all the 300's pot's pins, but the control console still
> indicates a problem.
> The resistance readings also do not jive with those in the manual.
>
> (And, just to be sure, I switched between the two control consoles I have,
> and each
> react the same way.)
>
> I've already called Hy-Gain, and they tell me to check the wiring. If
> that's okay,
> and I still have a problem, I could send the unit(s) back. Easier said than
> done.
>
> My questions: Has anyone who has also purchased the new HDR-300A rotator
> experienced similar problems, especially with the potentiometer? If so, if
> you took
> corrective action, what did you find useful--short of returning it to
> Hy-Gain of course?
>
> Tnx!
>
> 73,
>
> Joe, NJ1Q
>
>
>
>
>
>
>
>
>
>
>
>
>
> --
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