<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_1_1517504265433_6062"><span id="yui_3_16_0_1_1517504265433_6061">At r.f. frequencies, orange drops, etc., can cause problems. Disc ceramic capacitors, generally, do a much better job of bypassing than do capacitors like orange drops and other "poly" types of capacitors. Now, for audio coupling capacitors, many people, including myself, do believe that these "poly" type capacitors do a slightly better job.</span></div><div id="yui_3_16_0_1_1517504265433_6062"><span><br></span></div><div id="yui_3_16_0_1_1517504265433_6062"><span><br></span></div><div id="yui_3_16_0_1_1517504265433_6062"><span>Also, disc ceramic capacitors are, usually, much less expensive than the other types.</span></div><div id="yui_3_16_0_1_1517504265433_6062"><span><br></span></div><div></div><div id="yui_3_16_0_1_1517504265433_6060"> </div><div class="signature" id="yui_3_16_0_1_1517504265433_5889">Glen, K9STH </div><div class="signature" id="yui_3_16_0_1_1517504265433_5889"><br></div><div class="signature" id="yui_3_16_0_1_1517504265433_5889">Website: http://k9sth.net</div><div class="qtdSeparateBR" id="yui_3_16_0_1_1517504265433_5890"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_1_1517504265433_5896" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1517504265433_5895"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1517504265433_5894"> <div dir="ltr" id="yui_3_16_0_1_1517504265433_5893"> <font size="2" face="Arial" id="yui_3_16_0_1_1517504265433_5892"> <hr size="1" id="yui_3_16_0_1_1517504265433_5891"> <b><span style="font-weight:bold;">From:</span></b> Kenneth G. Gordon <kgordon2006@frontier.com><br> <b><span style="font-weight: bold;">To:</span></b> Doug & Kathy Davies <dkdavies3@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> Thursday, February 1, 2018 10:43 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Heath] Replacement Caps<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1517504265433_6054"><br><div dir="ltr" id="yui_3_16_0_1_1517504265433_6055"> <br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6127">> Can I replace disc ceramics with the 'orange drop' types?<br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6128"><br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6137">Well, yes, you CAN, but why would you want to? The orange drops are much larger, and in <br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6136">my opinion, look ugly in an old radio. What is wrong with the disk ceramics? Do you need to <br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6135">replace those? In my experience, they very seldom ever go bad.<br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6134"><br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6133">> The values I need i can't find under <br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6131">> the disc ceramic headings.<br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6132"><br></div><div dir="ltr">As we have been telling you, you do not NEED "exact" value replacements! The tolerance <br></div><div dir="ltr">of the original caps is so loose that anything even reasonably close will work just fine.<br></div><div dir="ltr"><br></div><div dir="ltr">> I have a silver mica cap .001 @ 2kv. This value is not available in silver mica. What can I <br></div><div dir="ltr">> substitute with?<br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6152"><br></div><div dir="ltr">A value that high usually means either it is a resonating capacitor in a low frequency circuit, <br></div><div dir="ltr">or is simply a bypass cap. That value of cap IS still available, but will be somewhat difficult <br></div><div dir="ltr">to find. If you tell us what circuit it is being used in, we can better advise you on what to sub <br></div><div dir="ltr">it with.<br></div><div dir="ltr"><br></div><div dir="ltr">> I need some .005uf mylar caps. This value is not available in mylar. Substitute?<br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6160"><br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6161">Again, as we have been telling you, "anything reasonably close". 0.0047 for instance. <br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6162">Again, trying to find an exact value shown on the capacitor in question is unnecessary.<br></div><div dir="ltr" id="yui_3_16_0_1_1517504265433_6163"><br></div></div> </div> </div> </div></div></body></html>