[Heath] AR-3 - another question

[Glen Zook]

I have both an AR-2 and an AR-3.  On the AR-2 it takes 2.5 turns on the main tuning knob to go from end to end on the dial and on the AR-3 it takes 3 turns on the main tuning knob to go from end to end on the dial.

As for the "hum" when in the CW position:

Check the 12AV6 and the wiring around it.  Also, replace the 20 mfd capacitor from Pin-8 of the 12V6 to ground.

 Glen, K9STH Website: http://k9sth.net

      From: Kenneth G. Gordon <kgordon2006 at frontier.com>
 To: Heath at puck.nether.net 
 Sent: Monday, April 18, 2016 11:36 AM
 Subject: [Heath] AR-3 - another question
   
>From the wording in the assembly manual, it would appear that the 
main-tuning capacitor has built-in planetary reduction gearing, yet none of the 
three receivers I have here exhibit that "feature". Tuning of the main-tuning 
dial is direct and very fast.

In the past, I have seen such capacitors in which the reduction gearing was 
"frozen", and by judicious application of some proper lubrication, this could be 
"reactivated".

So, did the AR-3's main tuning capacitor in fact originally include planetary 
reduction gearing?

  
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