<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_ym18_1_1458413921448_6210" dir="ltr"><span id="yui_3_16_0_ym18_1_1458413921448_6232">Using tinned braid from something like RG58/U works fine for repairing Heath LMOs. There are both tinned braids and un-tinned braids that are very stiff and can cause problems. </span></div><div id="yui_3_16_0_ym18_1_1458413921448_6210" dir="ltr"><span><br></span></div><div></div><div id="yui_3_16_0_ym18_1_1458413921448_6211"> </div><div class="signature" id="yui_3_16_0_ym18_1_1458413921448_6242">Glen, K9STH </div><div class="signature" id="yui_3_16_0_ym18_1_1458413921448_6242"><br></div><div class="signature" id="yui_3_16_0_ym18_1_1458413921448_6242">Website: http://k9sth.net</div><div class="qtdSeparateBR" id="yui_3_16_0_ym18_1_1458413921448_6331"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym18_1_1458413921448_6337" 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_ym18_1_1458413921448_6336"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym18_1_1458413921448_6335"> <div dir="ltr" id="yui_3_16_0_ym18_1_1458413921448_6334"> <font size="2" face="Arial" id="yui_3_16_0_ym18_1_1458413921448_6333"> <hr size="1" id="yui_3_16_0_ym18_1_1458413921448_6332"> <b><span style="font-weight:bold;">From:</span></b> JF <lhouseparker@livingston.net><br> <b><span style="font-weight: bold;">To:</span></b> "Alexander N. Gerl"i" <ac1wye@gmail.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> Saturday, March 19, 2016 3:23 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Heath] SB-104A squirrely VFO?<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym18_1_1458413921448_6338"><br><br>No, the SB-104A VFO was not pre-assembled. The twitchiness in an aged <br>VFO is due to the shaft bearings eventually not making good contact <br>with the frame - I seem to recall that there was a conductive grease <br>in the bearings that dried out with time. The best fix was to solder <br>a length of very flexible copper braid (like RG58 coax braid) from a <br>clear spot on the shaft to a nearby chassis ground point. The trick <br>is that you have to install it in enough of a spiral so that when the <br>shaft is turned to the stops it does not pull the braid tight or bend <br>the braid at the solder point.<br><br>Other wire/cable connector ground points may need to be re-soldered.<br><br>Another responder to your post recommended a URL for a tutorial for <br>tube-type VFOs, and the process is similar to that for the <br>solid-state VFO; however, there is one statement in it that is, IMHO, <br>potentially wrong - it says you can use tinned or untinned braid, <br>but if the tinned stuff is stiff at all it will not flex well enough <br>to last.<br><br></div> </div> </div> </div></div></body></html>