<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_1_1456241015209_4630"><span id="yui_3_16_0_1_1456241015209_4724">Have you replaced the 6-each 10-ohm resistors that go from pins 1, 4, and 6 of the final amplifier tubes to ground? If not, replace them with modern 1-watt resistors which are about the same size as the original 1/2-watt resistors. These resistors actually form the meter shunt when the meter is in the "plate" position since the "plate" meter actually reads cathode current. The original cathode resistors change value over the years and cause all sorts of "plate" meter problems.</span></div><div id="yui_3_16_0_1_1456241015209_4630"><span><br></span></div><div id="yui_3_16_0_1_1456241015209_4630"><span><br></span></div><div id="yui_3_16_0_1_1456241015209_4630"><span><br></span></div><div id="yui_3_16_0_1_1456241015209_4630"><span id="yui_3_16_0_1_1456241015209_4772">A little rise in the "plate" current reading is common. But a lot of rise is not!</span></div><div id="yui_3_16_0_1_1456241015209_4630"><span><br></span></div><div id="yui_3_16_0_1_1456241015209_4630"><span><br></span></div><div></div><div id="yui_3_16_0_1_1456241015209_4732"> </div><div class="signature" id="yui_3_16_0_1_1456241015209_4733">Glen, K9STH </div><div class="signature" id="yui_3_16_0_1_1456241015209_4733"><br></div><div class="signature" id="yui_3_16_0_1_1456241015209_4733">Website: http://k9sth.net</div><div class="qtdSeparateBR" id="yui_3_16_0_1_1456241015209_4734"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_1_1456241015209_4776" 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_1_1456241015209_4775"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1456241015209_4774"> <div dir="ltr" id="yui_3_16_0_1_1456241015209_4773"> <font size="2" face="Arial" id="yui_3_16_0_1_1456241015209_4777"> <hr size="1" id="yui_3_16_0_1_1456241015209_4799"> <b><span style="font-weight:bold;">From:</span></b> Joseph Smalley via Heath <heath@puck.nether.net><br> <b><span style="font-weight: bold;">To:</span></b> "heath@puck.nether.net" <heath@puck.nether.net> <br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, February 22, 2016 8:05 PM<br> <b id="yui_3_16_0_1_1456241015209_4779"><span style="font-weight: bold;" id="yui_3_16_0_1_1456241015209_4778">Subject:</span></b> [Heath] SB-102 Idling plate current<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1456241015209_4780"><br><div id="yiv9341866295"><div id="yui_3_16_0_1_1456241015209_4782"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;" id="yui_3_16_0_1_1456241015209_4781"><div dir="ltr" id="yiv9341866295yui_3_16_0_1_1456192607019_2340">Hello fellow Hams, Name is Joe, call WA3CKA, builder of my SB-102 in 1972, updated 3 years ago in use everyday.</div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2458" dir="ltr"><br></div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2396" dir="ltr">I find that the idling plate current rises above the 50 ma setting as I transmit in a normal length CW QSO maybe 5 minutes. <br></div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2457" dir="ltr"><br></div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2438" dir="ltr">Final tubes were new old stock now 3 years old. Any suggestions as what may be causing this condition.</div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2456" dir="ltr"><br></div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2455" dir="ltr">You can speak to me in technical terms if you want as I am a retired electronics tech. So far I find nothing wrong.</div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2502" dir="ltr"><br></div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2530" dir="ltr">I only do CW. 73 to all.</div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2531" dir="ltr"><br></div><div id="yiv9341866295yui_3_16_0_1_1456192607019_2532" dir="ltr"><br></div></div></div></div></div> </div> </div> </div></div></body></html>