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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks for the suggestions, I have measured the HV with a HV probe and a digital meter. It does agree with the panel meter on the amp. I’m leaning to soft cap’s since they were replaced 10yrs or more ago. Probably they have some internal leakage resistance. When operating on 80 & 40M’s plate current is about 350-400ma, as mentioned earlier, HV is about 1800 drops to 1750. I’m driving it with 60w’s,on an SB610 scope there appears about a 4X output display from exciter and amp output.. I don’t feel line voltage would create that much of a lower HV. All other devices in shack are operation fine. Line voltage is running about 122ac. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jim K8DHC<o:p></o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> Heath [mailto:heath-bounces@puck.nether.net] <b>On Behalf Of </b>Guy Giacopuzzi<br><b>Sent:</b> Friday, February 03, 2017 8:30 PM<br><b>To:</b> heath@puck.nether.net<br><b>Subject:</b> Re: [Heath] SB200 HV Question<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p>Mine's 2850 vdc idling...drops about 100 or less key down...<o:p></o:p></p><p>Guy,<o:p></o:p></p><p>WA6OQQ<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 2/3/2017 4:54 AM, Ken, W8EK wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><br>Resistors for high voltage metering For Sale: <br><br>Do you have a Heath linear amplifier that has an <br>error in the high voltage reading? Maybe you do <br>not even know it has an error! <br><br>Heath used three 4.7 meg resistors in the SB-220/221 <br>and also in the SB-200/201 amplifiers. Almost all <br>of these resistors are out of tolerance today, partially <br>because of their age, but also because their voltage <br>rating was exceeded. <br><br>I was able to obtain a quantity of new resistors that <br>are 4.7 Meg, 1% tolerance, 2 watt, and are rated to <br>handle the high voltage. This compares to the original <br>resistors furnished by Heath that were 4.7 Meg, 5%, <br>1 watt and about 400 volts. <br><br>Buy a set of three for $3 plus shipping from Florida. <br>Combine with other items to save shipping! <br><br>Thanks. <br><br>73, <br><br>Ken, W8EK <br><br>Ken Simpson <br>E-mail to <a href="mailto:W8EK@FLHam.net">W8EK@FLHam.net</a> or <a href="mailto:W8EK@arrl.net">W8EK@arrl.net</a> <br>Voice Phone (352) 732-8400 <br><br><br><br>Paul Blumhardt wrote on 2/2/2017 9:07 PM: <br><br><o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Jim <br><br> Your HV meter reading is likely low due to the voltage <br>divider resistor string going up in value. Check those resistors <br>before doing anything. <br><br><br><br> How much power output do you see on 40 meters? Output <br>power is the real test of if your amp has a problem or not. <br><br><br><br>Vy 73 <br><br>Paul <br><br><br><br>*From:* Heath [<a href="mailto:heath-bounces@puck.nether.net">mailto:heath-bounces@puck.nether.net</a>] *On Behalf Of *Jim's <br>*Sent:* Thursday, February 02, 2017 7:51 PM <br>*To:* <a href="mailto:heath@puck.nether.net">heath@puck.nether.net</a> <br>*Subject:* [Heath] SB200 HV Question <br><br><br><br>I have finally got my SB200 on the air. The cap’s have been replaced <br>many years ago but everything else is stock. My idling HV runs about <br>1900v’s key down it drops to about 1750V’s. Line voltage to the amp is <br>off a separate 120 v 20amp ckt. Is this voltage normal? Should I be <br>looking for about 2500v’idiling? Would changing the caps to 180mfd and <br>changing the equalizing resistors to a lower value help? <br><br><br><br>Thanks for your information <br><br>73 <br><br>Jim K8DHC <br><br><br><br>_______________________________________________ <br>Heath mailing list <br><a href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a> <br><a href="https://puck.nether.net/mailman/listinfo/heath">https://puck.nether.net/mailman/listinfo/heath</a> <o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________ <br>Heath mailing list <br><a href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a> <br><a href="https://puck.nether.net/mailman/listinfo/heath">https://puck.nether.net/mailman/listinfo/heath</a> <o:p></o:p></p></blockquote><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>-- <br><img border=0 width=975 height=100 id="_x0000_i1025" src="cid:image001.jpg@01D27EDF.866553C0"><o:p></o:p></p></div></div></body></html>