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eHam Forums => Elmers => Topic started by: W0EB on October 17, 2000, 01:47:41 AM



Title: Ham-M rotator Motor Start Cap
Post by: W0EB on October 17, 2000, 01:47:41 AM
Anyone know where I can get a 120 uf
50 volt non polarized capacitor to repair my Ham-M rotator?


Title: Ham-M rotator Motor Start Cap
Post by: AC5UP on October 17, 2000, 01:57:35 PM
Do I recall you can sub a pair of polarized electrolytic caps wired in parallel of the same capacity and voltage? (120uf/50vdc) Positive to negative, negative to positive, think of them like parallel diodes where one cap conducts on each half cycle.

(?)


Title: Ham-M rotator Motor Start Cap
Post by: HP1AC on October 17, 2000, 05:18:23 PM
I got one for my Ham M rotor in a shop that sales items
for airconditioning and refrigerating system.
The only problem is the size but I installed it outboard.


Title: Ham-M rotator Motor Start Cap
Post by: KB9JTN on October 17, 2000, 08:04:03 PM
If you was to get in contact with Norm's Rotor service via e-mail they should be able to help. Their e-mail address is as follows: RotorNorm@aol.com . Hope this helps. 73, Scott


Title: Ham-M rotator Motor Start Cap
Post by: KF7BS on November 01, 2000, 11:55:11 PM
I found a direct replacement by visiting a local electric motor repair and parts shop. It was a little bigger in size, but with a little work we made it fit. Total cost was less than $5.00. Good luck


Title: Ham-M rotator Motor Start Cap
Post by: K0RS on November 03, 2000, 03:38:10 AM
I get my motor start/run caps from Grainger (the same that sponsers the NASCAR racer).  They have a suitable replacement for less than $3.  Any fit problem is easily cured by avoiding it altogether.  Just mount the cap on the tower next to the rotor.  This frees up a pair of wires in your 8 wire cable that can be paralleled with the ground and brake release (which is also the motor center tap) for less resistance and better turning power.  Hook the cap across terminals #4 and #8 on the rotor.