[ARC5] Hacked R-27/ARC-5

Michael Hanz aaf-radio-1 at aafradio.org
Thu Sep 30 22:14:26 EDT 2021


It's an R-26 modified for remote tuning, normally with an ART-13.

https://aafradio.org/docs/C-131.html has a rundown on the set.

73,
  - Mike  KC4TOS

On 9/30/2021 7:21 PM, mmab wrote:
> I got this hacked R-27 at the TRW Swap Meet this past weekend. It has 
> a 1:1 ratio worm drive assembly installed in place of the regular worm 
> drive with its tuning shaft projecting through a new hole that is 
> 7/16" above the hole for the regular tuning shaft. The dial and all of 
> the gears for it have been removed and a 3/16" thick aluminum backer 
> plate has been installed behind the panel to cover up the holes for 
> the dial shaft and regular tuning shaft. Nine new holes have been 
> drilled in the front panel to accomplish these mods.
>
> My question is, were did this 1:1 gear drive come from?  It fits the 
> mounting studs on the R-27 tuning capacitor perfectly, like it was 
> made for the job.  A half turn on its shaft smoothly turns the tuning 
> cap through its full range.  I've seen bevel gears to accomplish a 
> 90-degree change in shaft direction before but never 1:1 worm gears.
>
> Mike, W6MAB



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