<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1461016454898_11771"><span id="yui_3_16_0_ym19_1_1461016454898_11782">You are reading the manual incorrectly! What it means by the dual tuning capacitor is there are 2-sections to the capacitor and there is a separate bandspread capacitor. The dial pulley is attached directly to a 1/4th inch diameter shaft that is directly attached to the main tuning capacitor rotor. There is no reducing mechanism, of any type, in both the AR-2 and AR-3. At least in both of my receivers.</span></div><div id="yui_3_16_0_ym19_1_1461016454898_11771"><span><br></span></div><div></div><div id="yui_3_16_0_ym19_1_1461016454898_11783"> </div><div class="signature" id="yui_3_16_0_ym19_1_1461016454898_11952">Glen, K9STH </div><div class="signature" id="yui_3_16_0_ym19_1_1461016454898_11952"><br></div><div class="signature" id="yui_3_16_0_ym19_1_1461016454898_11952">Website: http://k9sth.net</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1461016454898_11784"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1461016454898_11789" style="display: block;"> <div style="font-family: HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1461016454898_11788"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1461016454898_11787"> <div dir="ltr" id="yui_3_16_0_ym19_1_1461016454898_11786"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1461016454898_11785"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Kenneth G. Gordon <kgordon2006@frontier.com><br> <b><span style="font-weight: bold;">To:</span></b> Glen Zook <gzook@yahoo.com> <br><b><span style="font-weight: bold;">Cc:</span></b> Heath@puck.nether.net<br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, April 18, 2016 3:41 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Heath] AR-3 - another question<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1461016454898_11790"><br>On 18 Apr 2016 at 20:17, Glen Zook wrote:<br clear="none"><br clear="none">> I have both an AR-2 and an AR-3. On the AR-2 it takes 2.5 turns on the main<br clear="none">> tuning knob to go from end to end on the dial and on the AR-3 it takes 3 turns on<br clear="none">> the main tuning knob to go from end to end on the dial.<br clear="none"><br clear="none">All of mine do too, but I am almost certain that is not correct. Most of those BC-band dual<br clear="none">tuning caps which have the two-different-sized shafts WERE reduction geared, but in my<br clear="none">experience, since they were very "lightly" built to begin with, they very shortly froze up. I<br clear="none">have a couple of those NOS which still work correctly, but those I have do not have the<br clear="none">correct capacitance to replace the one in the AR-3 with.<div class="yqt7631361749" id="yqtfd78109"><br clear="none"><br clear="none">> As for the "hum" when in the CW position:<br clear="none">><br clear="none">> Check the 12AV6 and the wiring around it. Also, replace the 20 mfd capacitor<br clear="none">> from Pin-8 of the 12V6 to ground.</div><br clear="none"><br clear="none">I replaced the 12AV6 and that made a big difference, and I also found loose ground<br clear="none">connections all over the place. I'll fix all those next.<br clear="none"><br clear="none">Thank, Glenn.<br clear="none"><br clear="none">Ken W7EKB<br><br></div> </div> </div> </div></div></body></html>