[R-390] RE: Spinner knob for R-390

[Drew Papanek]

Randy wrote:

>Someone on the list used to modify the KC knob with a spinner. I remember  
>seeing a picture of one, but have lost track of his address and name.

I added a spinner to the KC knob on my '67 EAC a couple of decades ago.
I spotfaced an area near the edge of the knob, drilled and tapped a hole.
The spinner itself is a Torrington roller bearing cam follower having a
threaded stud screwed into aforementioned hole.

It looks neat and works well, as well as a spinner on an R-390x could be
expected to work...

With even gentle cranking the KC counter digit wheels bounce all around
and make a hellacious rattle.  I would not expect the counter to last long
with that kind of abuse.

I use it still, but turn it no faster than about the speed one could
get without a spinner.

If you want a spinner for ergonomic considerations when tuning normally,
then do it.   But  give up all aspirations of bandscanning huge chunks of 
spectrum
with deft flicks of the wrist.

Drew