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Re: [TowerTalk] Why time delay on UST MDPL?

To: <>, "'Tower and HF antenna construction topics.'" <>
Subject: Re: [TowerTalk] Why time delay on UST MDPL?
From: "Tod -ID" <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Sun, 14 Feb 2010 14:59:48 -0700
List-post: <">>

I was told that they are available from other sources. For some reason I
think that they may be from GE or some other major relay manufacturer.

I think you have 'purchasing' connections -- maybe you can find a second
source and let us know. It would be in the archives of Tower Talk and should
be able to be googled in the future.

I have no idea when you are going "up,,,up and away" that your motor would
stall in the way you mention. Especially if all you do is to wait a few
seconds and then try it again and it works. Do you suppose there is some
sort of bearing problem in the gear down mechanism? Does it only stall going
up or does it also stall going down?

I did think of suggesting that you fiddle with the time delay pot but
figured you had already done that.


> -----Original Message-----
> From: 
> [] On Behalf Of Rick Karlquist
> Sent: Sunday, February 14, 2010 1:23 PM
> To: Tower and HF antenna construction topics.
> Cc:
> Subject: Re: [TowerTalk] Why time delay on UST MDPL?
> Tod -ID wrote:
> >  Rick:
> >
> > Isn't the time delay pluggable? There is too much snow 
> between me and 
> > the tower base to want to check personally, but I would 
> certainly hope 
> > it is easy to change if needed.
> Yes, it is pluggable.  It will be interesting to see how 
> "responsive" UST is if I try to order a replacement relay :-)
> > I had assumed that the time delay was to let any 'wind down' of the 
> > winch/motor assembly to happen before the motor tries to 
> move things 
> > in a different direction. Although the rate at which everything is 
> > moving seems pretty slow I suppose there is something in the system 
> > with just enough inertia to put a serious load on the motor 
> when it is 
> > trying to run in a different direction.
> >
> > To me the fact that your motor stalls when you change direction is 
> > indeed a 'clue'. One should allow things to stop moving before 
> > changing directions is
> I can understand a situation where the motor is still moving 
> in one direction and you try to go the other direction.  But 
> what I am seeing is that the motor has stopped moving and I 
> am merely trying to start up again in original direction (IE, 
> going up, stop, then going up again).  The time delay 
> evidentally prevents the motor from stalling in this case, 
> but I don't understand why it would stall in the first place.
> I'll plan on replacing the relay if diddling the time delay 
> adjustment pot does not bring it back.
> Rick N6RK
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