Perhaps only the G-450A (now G-450ADC) recently changed to DC?
John KK9A
Jack Brindle W6FB wrote:
It happened long before 2019. My G-1000DXA from the 2000's is a DC device.
Schematics for the controllers and rotors are on-line and available.
73,
Jack, W6FB
> On Aug 6, 2021, at 1:47 PM, Grant Hopper <kb7wsd at gmail.com> wrote:
>
> There is one "gotcha" to all this. In 2019, Yaesu changed to using DC on
> the rotors. From DX-Engineering " Instead of the usual AC motor drive
> used in older rotator designs, the G-2800DXA, G-1000DXA and G-800DXA use a
> variable-voltage DC motor, removing the need for a large starting
capacitor
> with its potential for failure exposed to outside temperature variations.
> " The 450 and the 5500 are the same way.
>
> There might be an easy way to determine the AC vs DC upon inspection. I
> haven't looked at all the manuals to confirm this but at least with the
> 450, it uses only four wires for DC types. Otherwise, some of the models
> are stamped with a "DC" after the model number eg. " For clarity, the new
> DC rotator motors are marked "G-450DC" at the connector. The rear panel of
> the controller is titled "G-450ADC" on the serial number label."
>
> 73,
> Grant
> KB7WSD
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