[R-390] Oldham Coupler Maintenance

[rbethman]

Roger,

The problem INDEED is binding!

I was just trying to understand/IDENTIFY "which" it was!

His PTO "MAY" be locked up, for lack of a better term and understanding.

Bob - N0DGN

> Hi Bob,
>
> When i turn the kilocycles knob in front, I can turn it a fraction of 
> an inch in both directions, the frequency readout will change a little 
> but the PTO does not move at all. I'm talking just a little bit, I'll 
> let you know how much tomorrow when I turn it on,
>
> bob
>
>
> From: rbethman <rbethman at comcast.net>
> To: Bob Young <youngbob53 at msn.com>
> CC: 'R-390 List' <r-390 at mailman.qth.net>
> Subject: Re: [R-390] R-390/URR
> Date: Sun, 28 Oct 2007 13:21:20 -0500
>
> Bob,
>
> Everyone is giving advice that would follow BINDING.  You use(d) the 
> term BACKLASH.
>
> I'm trying to understand WHICH it is - BEFORE sending you down a path.
>
> Bob - N0DGN 


Flowertime01 at wmconnect.com wrote:
> Fellows,
>
> If you stretch the spring on the oldham coupler while spinning the KC knob 
> and thus change the relation of the rotation angle between the KC knob and cam 
> shafts to the VFO position shaft then you have back lash.
>
> Too much friction causes the lash problem and maintenance fixes the lash 
> problem.
> Sorry to make this look like a binding problem.
>
> Sorry the fix to a lash problem is cleaning and lubrication.
>
> Read Tim's tales of the stuff he has encountered.
>
> Backlash in gear trains is also a friction problem.
> It the gears have low friction then they are just sloppy and have play but 
> not suffering from back lash.
>
> Roger.
>    </HTML>
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>
>