Re: [amsat-bb] Re: G5500

[Daniel Kekez <dkekez@xxxxxxxxxxxxx>]

All the measurements were made on the Rotators without any wires 
connected to the control boxes.

Thanks for the suggestion, though.

73,
-Daniel, VA3KKZ

Cliff Buttschardt wrote:
> Your being fooled by the capacitor!  In the 5500 and 5600 series, the
> capacitor is in the base of the rotator.  In the 5400 the capacitor is
> in the control box.  Either way you must measure the resistance with
> as least one wire removed from the control box to the rotator and then
> allow enough time for the ohmmeter to settle to a steady value.  There
> always is the chance the capacitors are not in good condition.
> Cliff K7RR
> 
> Daniel Kekez wrote:
> 
>>Hi Roy,
>>
>>I have measured the winding resistances on the 5500 Rotator:
>>A4-A5 - 6.4 ohm
>>A4-A6 - 2.8 ohm
>>E4-E5 - 9.6 ohm
>>E4-E6 - 5.8 ohm
>>
>>These refer to resistances between particular Azimuth and Elevation
>>terminals on the Rotators.
>>
>>I repeated the same measurements on a Yaesu 5400 Rotator that I have and
>>found the following:
>>A4-A5 - 7.5 ohm
>>A4-A6 - 3.9 ohm
>>E4-E5 - 18.8 ohm
>>E4-E6 - 9.3 ohm
>>
>>However, I don't know if I can compare these measurements between these
>>two rotators. Does anyone with a known-working 5500 know what their
>>measured winding resistances are?
>>
>>I'm not looking forward to the prospect to having to unmount the
>>antennas take the Rotators down from roof if I find they are also damaged.
>>
>>Thanks,
>>-Daniel, VA3KKZ
>>
>>Roy wrote:
>>
>>>Have you tried measuring the motor winding resistances (disconnected
>>>from control box) and comparing them with measurements from a good
>>>G5500?  I don't have one here however.
>>>
>>
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