Starting caps come in value ranges. My experience is that slightly higher
values generally pose no issue, whereas too small may not be enough to get
the motor started under load. Try it to confirm. If motor stalls on
startup, stop and go to a larger cap.
Hope this helps and good luck on your project.
73
Matt
KM5VI
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Joe Subich,
W4TV
Sent: Tuesday, January 30, 2024 7:52 PM
To: Raymond Benny <rayn6vr@gmail.com>; [TowerTalk]
<towertalk@contesting.com>
Subject: Re: [TowerTalk] UST Tower MA770 Starting Motor Capacitor
> How rigid is the 375MFD value?
Not that rigid ...
> I have found on eBay a cap, 378-454 uF MFD at 250VAC. Would this meet
> the starting cap value?
Easily.
73,
... Joe, W4TV
On 1/30/2024 8:39 PM, Raymond Benny wrote:
> I've had a MA770 tubular tower in the air for the last 15 years. I
> got it second hand 20 years ago. It's probably 40 years old. I need to
> replace the raising motor starting cap.I have the old cap in my hand
> and all I can read is 375 MFD. The motor operates on 120VAC. The motor
> name/data plate has been painted over, so I cannot read anything about
> it
>
> I have several questions:
> Does anyone have the make, model number or manufacturer info for MA770
> motor? And the info on the starting cap?
>
> How rigid is the 375MFD value? I have found on eBay a cap, 378-454 uF
> MFD at 250VAC. Would this meet the starting cap value? I know I don't
> need 240 VAC rated, but one rating should not be a problem. The
> measurements given for the cap will fit into the external cap holder.
>
> Thanks,
> Ray,
> N6VR/W7YA
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|