[ARC5] Help with tuning knob ideas for ARC-5 receiver

[WA5CAB at cs.com]

I'll add two further comments, as I don't recall anyone specifically 
mentioning these.  

There was a line of volume controls from the 50's or so (used in AC-DC 
radios, etc.) that had a splined shaft with a longitudinal slot cut in the end 
so that it would squeeze down a little.  The plastic knobs made to fit these 
also fit the Command Set receiver male splines pretty well.  And the OD of 
the end of the knob with the splined hole was (at least in several cases) a 
good fit for the ID of the male AN fitting.  They don't look too spiffy and 
the colors I seem to recall were brown and maroon or magenta.  But they 
worked pretty well.  Didn't tend to fall off.

And of course there were actual local tuning controls made, with a small 
spinner type knob.  A.R.C. 6743 and MC-127.    Both have a small spinner knob. 
 The throw of the spinner on the MC-127 is larger than the one on the 6743. 
 There is also a spinner knob similar to MC-127 made to fit the larger 
spline used on everything else in aircraft that had mechanical remote tuning 
(MC-237?).  It won't fit the Command Set receivers.  Finally, there was a local 
tuning "key" for tuning the locked-tuning receivers.  It stored on the 
underside of the tube cover, with the control box tuning dial.  But it is not 
convenient for general use.

In a message dated 10/23/2010 10:56:03 AM Central Daylight Time, 
leecraner at aol.com writes: 
> Guys,
> 
> You all have been a wonderful source of information and have given me a 
> wealth of ideas on fabricating the tuning knob for my project.  Thank 
> you for taking the time to respond and share your expertise!
> 
> 73
> Lee WB6SSW
> 
> 

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480