<div dir="ltr">Hi, Joe. It's been a while. Looking over the circuit I would check the values of R104, R105, and R115. That appears to control the value you would get for a meter reading. If they are all in spec, but the meter is still low, playing around with the values should adjust the meter reading to what you expect it to be. I think just changing the value of R115 would do the trick.</div><span>
</span><p dir="ltr">Bob Gibbons<br>
WB3CPZ</p><span>
</span><br><div class="gmail_quote"><div dir="ltr">On Mon, Mar 27, 2017, 1:54 PM Joseph Smalley via Heath <<a href="mailto:heath@puck.nether.net">heath@puck.nether.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_msg"><div style="color:#000;background-color:#fff;font-family:Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:13px" class="gmail_msg"><div id="m_8412495734465540810yui_3_16_0_1_1490632681360_5453" class="gmail_msg"><span class="gmail_msg"></span></div><div class="m_8412495734465540810qtdSeparateBR gmail_msg" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5452"><br class="gmail_msg"><br class="gmail_msg"></div> <div class="m_8412495734465540810yahoo_quoted gmail_msg" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5449" style="display:block"> <div style="font-family:Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:13px" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5448" class="gmail_msg"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5447" class="gmail_msg"> <div dir="ltr" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5450" class="gmail_msg"><font id="m_8412495734465540810yui_3_16_0_1_1490632681360_5451" size="2" face="Arial" class="gmail_msg"> On Sunday, March 26, 2017 10:54 PM, Joseph Smalley <<a href="mailto:mymodecw-hamitup@yahoo.com" class="gmail_msg" target="_blank">mymodecw-hamitup@yahoo.com</a>> wrote:<br class="gmail_msg"></font></div> <br class="gmail_msg"><br class="gmail_msg"> <div class="m_8412495734465540810y_msg_container gmail_msg" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5446"><div id="m_8412495734465540810yiv9325265917" class="gmail_msg"><div id="m_8412495734465540810yui_3_16_0_1_1490632681360_5445" class="gmail_msg"><div style="color:#000;background-color:#fff;font-family:Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:13px" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5444" class="gmail_msg"><div id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31711" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31733" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31736" clear="none" class="gmail_msg"></div><div id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31738" class="gmail_msg"> Hello to the group. I still use my SB-102 that I built in 1972, I have two issues I want to fix.</div><div id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31740" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31743" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31745" class="gmail_msg">Number ONE is the poor operation of the S-meter very rarely does the S-meter give a good reading</div><div id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31747" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31750" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31752" class="gmail_msg">even on real strong signals. A fellow ham close by gets a pinned needle on my TS-530sp on the</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31754" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31757" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31759" class="gmail_msg">Sb-102 it will be S9. Most stations I work have a loud signal but low reading on the S-meter. Never S9<br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31762" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31764" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31767" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31768" class="gmail_msg"> I have put new 6AU6 I.F. amplifier tubes in the radio no help. Replaced the Product detector/AVC tube, no help</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31770" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31773" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31775" class="gmail_msg">Any ideas will be appreciated.</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31777" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31780" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31782" class="gmail_msg">Number TWO sometimes the resting (idling) plate current will increase above the set value of 50 MA, this happens</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31784" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31787" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31789" class="gmail_msg">when I get long winded CW only here. <br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31792" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31794" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31797" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31799" class="gmail_msg">I recently repaired a SB-100 for a friend that had an excessive plate current reading which turned out to be</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31801" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31804" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31806" class="gmail_msg">the cathode resistors on the final amplifiers.This is not what I am experiencing. The reading was 3 ohms for the <br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31809" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31811" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31814" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31816" class="gmail_msg">six 20 OHM resistors in parallel, when I replaced the resistors the reading went to 1.6 OHMS which I measured</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31818" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31821" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31823" class="gmail_msg">on another properly working SB-102.</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31825" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31828" clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31830" class="gmail_msg">Any info will be appreciated.</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31832" class="gmail_msg"><br id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_31835" clear="none" class="gmail_msg"></div>73 Joe WA3CKA <div class="m_8412495734465540810yiv9325265917qtdSeparateBR gmail_msg"><br clear="none" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div class="m_8412495734465540810yiv9325265917yahoo_quoted gmail_msg" style="display:block" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5600"> <div style="font-family:Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:13px" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5599" class="gmail_msg"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5598" class="gmail_msg"> <div class="m_8412495734465540810yiv9325265917yqt3593709739 gmail_msg" id="m_8412495734465540810yiv9325265917yqtfd52302"><div class="m_8412495734465540810yiv9325265917y_msg_container gmail_msg" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5597"><br class="gmail_msg"><div id="m_8412495734465540810yiv9325265917" class="gmail_msg"><div id="m_8412495734465540810yui_3_16_0_1_1490632681360_5596" class="gmail_msg"><div style="color:#000;background-color:#fff;font-family:Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:13px" id="m_8412495734465540810yui_3_16_0_1_1490632681360_5595" class="gmail_msg"><div id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_8818" class="gmail_msg"> Hello to the group. I still use my SB-102 that I built in 1972, I have two issues I want to fix.</div><div id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9054" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9052" class="gmail_msg">Number ONE is the poor operation of the S-meter very rarely does the S-meter give a good reading</div><div id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9056" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_8962" class="gmail_msg">even on real strong signals. A fellow ham close by gets a pinned needle on my TS-530sp on the</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9058" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9051" class="gmail_msg">Sb-102 it will be S9. Most stations I work have a loud signal but low reading on the S-meter. Never S9<br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9102" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9050" class="gmail_msg"> I have put new 6AU6 I.F. amplifier tubes in the radio no help. Replaced the Product detector/AVC tube, no help</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9118" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9162" class="gmail_msg">Any ideas will be appreciated.</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9163" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9164" class="gmail_msg">Number TWO sometimes the resting (idling) plate current will increase above the set value of 50 MA, this happens</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9172" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9173" class="gmail_msg">when I get long winded CW only here. <br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9188" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9189" class="gmail_msg">I recently repaired a SB-100 for a friend that had an excessive plate current reading which turned out to be</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9240" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9241" class="gmail_msg">the cathode resistors on the final amplifiers.This is not what I am experiencing. The reading was 3 ohms for the <br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9264" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9319" class="gmail_msg">six 20 OHM resistors in parallel, when I replaced the resistors the reading went to 1.6 OHMS which I measured</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9320" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9321" class="gmail_msg">on another properly working SB-102.</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9369" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9384" class="gmail_msg">Any info will be appreciated.</div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9431" class="gmail_msg"><br clear="none" class="gmail_msg"></div><div dir="ltr" id="m_8412495734465540810yiv9325265917yui_3_16_0_1_1490579132159_9432" class="gmail_msg">73 Joe WA3CKA<br clear="none" class="gmail_msg"></div></div></div></div><br clear="none" class="gmail_msg"><br clear="none" class="gmail_msg"></div> </div></div><div class="m_8412495734465540810yiv9325265917yqt3593709739 gmail_msg" id="m_8412495734465540810yiv9325265917yqtfd05110"> </div></div><div class="m_8412495734465540810yiv9325265917yqt3593709739 gmail_msg" id="m_8412495734465540810yiv9325265917yqtfd57593"> </div></div></div></div></div><br class="gmail_msg"><br class="gmail_msg"></div> </div> </div> </div></div></div>_______________________________________________<br class="gmail_msg">
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<a href="mailto:Heath@puck.nether.net" class="gmail_msg" target="_blank">Heath@puck.nether.net</a><br class="gmail_msg">
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</blockquote></div><div dir="ltr">-- <br></div><div data-smartmail="gmail_signature"><p dir="ltr">Robert Gibbons</p>
</div>