[GreenKeys] LMU 11 motor

[John W9DDD]

Bruce's comments made me think about the differences between the 1/20 and the 1/12 HP motors.  My experience with spinning the fan to get a motor going has been limited to 1/20 HP motors. The 1/12 HP might not be capable of being spun up by hand with a bad cap or relay.  The RT set uses a 1/12 HP.  

John, W9DDD


> On Aug 3, 2022, at 6:32 AM, Nick England <navy.radio at gmail.com> wrote:
> 
> Finding a modern cap that will fit seems to be impossible. 
> 
> I did find a source of NOS 125v 88-108 mfd motor start caps that seem to work fine.
> 1" dia x 2.4" long so they fit OK.
> http://www.ebay.com/itm/141022712790
> or
> http://www.tedss.com/181384
> Mine came quickly and were very well packed.
> 
> It turns out that these are Teletype Part 181384 as used in the M33. Also suitable as a substitute for 162074 used in 1/40 HP miniature motor M28 TD and ROTR equipment (I just cut the wire leads short and soldered to them). 
> 
> They also work OK in the 1/20 HP motors in the 28KSR and 28RO. Not the correct value but I have replaced several with no issues. I haven’t tried them in the 1/12 HP motor in the 28ASR which uses yet another value cap. 
> 
> The motors with bad caps would just sit and tremble until I gave the fan a quick pull and then they would spin up OK. 
> 
> YMMV, no warranty, etc. 
> 
> Nick
> 
> -- 
> Nick England K4NYW
> www.navy-radio.com
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