[ARC5] DM-32/ 12 and 28 volt dynamotors

[AKLDGUY .]

I've brought out the dynamotor 28V lead separate from the heater lead. A
diode in the dynamotor B+ lead and another in the mains-powered B+ lead
means I don't need to switch the B+ from one to the other. With either the
dynamotor or the power supply running, the other's diode is reverse-biased.

Neil ZL1ANM

On Sun, Jun 9, 2019 at 6:45 PM Bill Pileggi <wpileggi at juno.com> wrote:

> You can use a 28 volt dynamotor even though the filaments are wired for 12
> volts. The dynamotor will simply turn a little slower and put out approx.
> 100-110 volts.  The receiver will still be very happy. (You did replace all
> the bypass capacitors in the receiver, didn't you? Otherwise, you might
> have a problem or 2 with high voltage in the receiver...)
>
> I've run the 28 volt dynamotors from as little as 8 volts reliably...Bill
> KA3AIS
>
> i have a bc-455 Rx that has been converted to 12vdc i know that the
> dynamotor should
> be the dm-32 for 28vdc can i use a dm-53(az) dyno 12v/220vdc are they the
> same size
> thanks for any help ka9dzr dennis
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