[TowerTalk] Yaesu 800DXA Followup

[Doug Scribner]

Mark,

Yaesu connectors here...

http://www.eham.net/classifieds/detail/387957

Doug - K1ZO

----- Original Message ----- 
From: "Mark Adams" <msadams60 at gmail.com>
To: <towertalk at contesting.com>
Sent: Monday, October 08, 2012 11:13 PM
Subject: [TowerTalk] Yaesu 800DXA Followup


> Hi Gang,
>
> In July I asked for help with my rotor issues and my initial notes are 
> below. Today I finally lowered the tower, removed the mast and stack to 
> see if anything was binding. The cabling was fine and the thrust bearing 
> was in good shape. Then we tried to run the rotor with no load and it 
> behaved just like before. I opened the rotor and the inside appears to be 
> like new. Hmmmmm....
>
> Now I need to make a cable to test the rotor on the bench. Does anyone 
> know if the Yaesu connectors are commonly available? Boat or auto stores 
> maybe? I'm sure Yaesu will be glad to sell me a pair :-)
>
> ------
> Email to list from July:
>
> Hi Gang,
>
> I've had this rotor up for a few years but this spring problems cropped 
> up.
> At first I could not get rotation if the speed was anything less than 
> HIGH.
> Then the rotor would only turn a little and simply stop. If I used a 
> preset
> and hit START, it would move some, stop and the rotor box would be hot if 
> I
> did not reset it quickly. Things I checked:
>
> 1. I thought that my homemade Kellums gave out and the rotor loops were
> tight but they still had enough slack to allow rotation.
> 2. I checked the connector at the rotor and it is clean and dry.
> 3. The rotor has not moved on the rotor plate. It's in its install
> position.
> 4. My mast is 1.94" OD 6061-T6 Al so it is not tight in the thrust
> bearing so I don't thing that is a problem, but I did not have a 2nd 
> person
> to operate the rotor while I was on the ladder. (It's on a TX-455 so I
> checked it cranked down.
> 5. Measured in the shack, the motor shows 10 Ohms.
> 6. Measured the voltage on pins 4-5 of the control box and I get 11V on
> LOW and 23.5V on HIGH.
> 7. I took the cover off and put my meter leads across the motor leads at
> J1009. Rotor was set to N. I then started full speed rotation CW and the
> voltage was a stead -21.9 right up unitl it stalled at 150 degees. I then
> tried CCW, V was 21.8 and got no rotation. Binoculars show that no cables
> are hung.
> 8. The inside of the box does have a bit of burned odor, but ever so
> slightly.
>
> Any ideas???
>
> FWIW, I'm turning an F-12 C4E, 2M7 and 64DX. All that was a tad much for
> the used HD-73, but this one should be fine IMO.
>
>
> 73,
> Mark K2QO
> FN03ra
>  Sent from my iPad
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