[Amps] PT-3000

Jim W7RY jimw7ry at gmail.com
Thu Jan 6 16:33:00 EST 2022


The stock PT2500 blower was a shaded pole motor. Very similar to the 
NCL-2000 fan setup. I bet the motor is available from WW Granger, and 
may be also available in 240 volt from them. Their on-line data sheets 
are very good and accurate.

73, Jim W7RY


On 1/6/2022 2:35 PM, Roger Parsons via Amps wrote:
> Unfortunately, I am sure. However, the schematic implies that the plate transformer is tapped. I will have to investigate further - the wiring and lack of labelling makes it quite clear that this was a prototype!
>
> I would still like to know if the original fan (possibly the same as the PT-2500) is available anywhere.
>
> 73 Roger
> VE3ZI
>
> Are you sure? Its not connected across one of the 120 volt windings on the plate or filament trnsformer?
> Or is this amplifier 240 volts only?
>
>
> You can always install a small 240-120 volt 3 lead isolation transformer available from Mouser.
> 73, Jim W7RY
>
> On 1/5/2022 8:51 AM, Roger Parsons via Amps wrote:
>
> Preferably a 240V version as the current 120V one is connected_*between live
> and ground...*_
>
> TIA
>
> 73 Roger
> VE3ZI
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