After looking at the older manuals, I think that's likely the case. The
800/1000/2800 seem to have been DC for a long time. The 450 changed in
2019 and the 5500 changed (based on the new manual and info at the DX
Engineering site) in 2019 too. That means all five of Yaesu's rotators are
all DC now.
On Fri, Aug 6, 2021 at 7:20 PM <john@kk9a.com> wrote:
> 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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