Just a quick update -- Yaesu Parts just emailed me and advised that they don't think any of the motors from other rotators are directly compatible with the G5500 azimuth motor -- the estimate on arrival time of more stock is uncertain, possibly 4-6 weeks or longer.
I haven't sourced a direct replacement motor yet; the original motor was sent down to Eurton Electric yesterday for rewinding, hopefully I'll have a quote and time estimate for that soon. 73! Dave KB5WIA On Fri, Feb 24, 2012 at 4:26 PM, Phil Karn <k...@ka9q.net> wrote: > On 2/23/12 2:51 PM, Tim Cunningham wrote: >> I have rewound a few of these motor coils and a #24 to #26 gauge enamel >> wire should work. A #22 gauge enamel wire would be too large and you >> would not be able to wind the same number of turns. >> >> It is the breakdown of the enamel due to wire heating that makes them >> fail by creating a short circuit in the windings. > > I don't remember the wire size I used (it's been over 20 years) but > you're right about the short circuit. Just one shorted turn will form > the shorted secondary of a transformer, and the I^2R losses in that turn > will create quite a bit of heat that will further damage the insulation > on the nearby windings until the whole thing is toast. > _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
