[TowerTalk] Yaesu rotator problem

[Pete Smith]

Steve, I'm pretty sure that the change was made when the A series came out, and reflected the change in the controller design rather than a change from DC to AC.  I *think*, as well, that the use of 6-terminal connectors dates back to the SDX presettable series, and that the units still need 5 wires, rather than 4.

I believe that lines 1-3 are the potentiometer leads, and you should be quickly able to determine which is which and measure the resistance directly.  4 and 5 are the motor windings, and other than assuring connectivity and a relatively low resistance I don't think there's anything tell-tale there.

But instead of conjecture, I suggest you call Yaesu tech support and ask for Jerry - I have always found him very knowledgeable about the rotators.  

73, Pete N4ZR

At 11:48 AM 10/21/2005, K7LXC at aol.com wrote:
>Howdy, TowerTalkians --
>
>    I ran into a problem that's got me stumped. I've got a Yaesu G-800 
>rotator that doesn't seem to work. It was not tested prior to installation on the 
>tower but I haven't ever had any infant mortality problems with Yaesus so maybe 
>it's something on our end.
>
>    I think I remember that Yaesu rotators changed voltage systems recently - 
>they went from ac to dc or vice versa - I don't remember which, but the 
>result is that instead of using 6 wires, now they only use 4. Which is fine except 
>they don't tell you that in the instruction manual so you wind up soldering 4 
>extra wires (2 on each end) that aren't needed. And they're not the easiest 
>buggers to work with in the first place. :-(
>
>    Anyway, we got the 4 wires hooked up and it doesn't work - no rotation, 
>no indication, etc. We've got power and had to replace the little internal 3A 
>fuse but as Mark would say, no worky worky. We couldn't find any pin-out 
>measurements like you find with Hy-Gain rotors so we couldn't do any measurements. 
>Can anyone give us any simple measurements/tests we can do? We haven't run a 
>cable continuity check but I haven't had that sort of problem before but I'm not 
>ruling anything out.
>
>    Any help appreciated.
>
>Cheers,
>Steve    K7LXC
>TOWER TECH 
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