[ARC5] Dynamotors.

[Jim Wiley]

Another possible source for dynamotors is a local two-way radio shop, 
such as GE or Motorola.  These sets have not used dynamotors for years, 
probably since the 60's at the latest, but one never knows what is still 
in the basement, so to speak.  Doesn't hurt to ask, and the chances are 
that if you find one, the shop will be more than happy to donate it to 
your cause.

These sets sometimes were 60 to 100-watt class sets, with appropriately 
robust "innards" to match.

- Jim, KL7CC



On 2/19/2015 3:20 PM, Kenneth G. Gordon wrote:
> On 19 Feb 2015 at 21:52, J Mcvey wrote:
>
>> "I also have two "new" 12VDC input, 600 VDC at 200 mA output dynamotors
>> I'll use for the transmitters."
>>
>> Could you share the model number of this dynamotor? What system is is it
>> from?  My scr-274 series are converted to 12V, but the dynamotor that I have is
>> only 440 volts, @ 200 ma. That's all I could find...
> Sure. I have two: they are both Stromberg-Carlson Dynamotor 42486, 12V
> 16.8 amps input, 680 VDC at 210 mA output, MPF-4-45.
>
> These were made by Webster Products
>
> They have the US Navy anchor stamp on them. Neither one have the
> end-bells on them, so I am going to have to make some new ones for them
> before I use them. They have never been used.
>
> These were part of a load of "junque" I got from our University's EE
> department when they were cleaning a bunch of that out.
>
> They were obviously for some sort of military, U.S. Navy, transmitter, but I
> have no idea which one.
>
> Maybe WA5CAB might know.
>
> I did a search on eBay for dynamotors too, and found two 12V jobs which
> output 500 VDC at 200 mA.
>
> I also found two 6V input jobs which output 600 VDC at 200 mA. I suppose
> you could connect the inputs in series and the outputs in parallel...
>
> Ken W7EKB
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