<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1527786896145_6515"><span id="yui_3_16_0_ym19_1_1527786896145_6516">No "O" ring on the mechanism that turns the LMO in any of the Heath SB-Line equipment. The friction ring sits so that there is one portion on each side of the inner ring of the dial. This is adjusted by moving the assembly up, or down, on the inner ring. The adjustment is correct when the dial can be turned through a full 360-degrees without slipping or binding.</span></div><div id="yui_3_16_0_ym19_1_1527786896145_6515"><span><br></span></div><div id="yui_3_16_0_ym19_1_1527786896145_6515"><span><br></span></div><div id="yui_3_16_0_ym19_1_1527786896145_6515"><span id="yui_3_16_0_ym19_1_1527786896145_6656">It sounds like someone tried to use an "O" ring to provide friction instead of properly aligning the drive.</span></div><div></div><div id="yui_3_16_0_ym19_1_1527786896145_6514"> </div><div id="yui_3_16_0_ym19_1_1527786896145_6514"><br></div><div class="signature" id="yui_3_16_0_ym19_1_1527786896145_6513">Glen, K9STH </div><div class="signature" id="yui_3_16_0_ym19_1_1527786896145_6513"><br></div><div class="signature" id="yui_3_16_0_ym19_1_1527786896145_6513">Website: http://k9sth.net</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1527786896145_6460"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1527786896145_6464" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1527786896145_6463"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1527786896145_6462"> <div dir="ltr" id="yui_3_16_0_ym19_1_1527786896145_6461"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1527786896145_6512"> <hr size="1" id="yui_3_16_0_ym19_1_1527786896145_6511"> <b><span style="font-weight:bold;">From:</span></b> Rich Sahlender <wa3wlh@comcast.net><br> <b><span style="font-weight: bold;">To:</span></b> heath@puck.nether.net <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, May 31, 2018 11:33 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [Heath] SB102 Main Tuning Knob And Friction Wheel<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1527786896145_6509"><br>Hopefully the following will make sense to those of you familiar with<br>the SB102 VFO and the curious "friction?" method used by the main tuning<br>knob to actually tune the VFO.<br><br>I acquired a SB102 on which the VFO main tuning knob was spinning without<br>moving the VFO. The old ragedy manual that was provided with it is useless<br>as the pages related to how the mechanism works are badly worn and / or<br>missing. So until I can get a usable copy of the manual I am winging it.<br><br>I pulled off the main tuning knob and found that the "friction?" wheel on<br>the stud that the knob installs on was not making contact with the<br>"ring?" on the VFO mechanism itself. Curious design. Anyway it looks<br>like there are remains of an old disintegrated o-ring originally on that<br>wheel. Is there supposed to be such a ring to provide the friction with<br>the VFO?<br><br>The two "plates?" that make up the friction wheel are snug but not so<br>much that they cannot simply be pushed down onto the ring attached to<br>the VFO mechanism so that the ring slips in between the two plates. So I<br>went ahead and did that and it now tunes the VFO just fine but... should<br>it be left this way to operate or should I be looking for an<br>appropriately sized o-ring to slip on the wheel to provide friction with<br>the ring in the VFO mechanism?<br><br><br></div> </div> </div> </div></div></body></html>