<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div><span>As for the bypass capacitors: Collins does the same thing in the S-Line transmitters and in the KWM-1 and KWM-2 series. There is enough inductance in the leads within the 6146 family to cause spurious oscillations at VHF and UHF. Therefore, the need to bypass all 3 of the cathode connections.</span></div><div><span><br></span></div><div><span>Some transmitters might not have problems, but, to be on the safe side, Collins bypassed all the cathode connections and Heath followed suit.</span></div><div> </div><div>Glen, K9STH<br><br></div><div>Website: http://k9sth.com<br> <div style="font-size: 12pt; font-family: arial, helvetica, sans-serif; "> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span
style="font-weight:bold;">From:</span></b> Dick KF4NS <kf4nsradio@verizon.net><br> <b><span style="font-weight: bold;">To:</span></b> Heath puck list <heath@puck.nether.net>; heathkit@mailman.qth.net <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, May 23, 2012 7:15 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [Heath] HW100/101 curiosity<br> </font> </div> <br>
Hi guys,<br><br>A couple things have always bugged me so I will ask the questions now and see what I can determine.<br><br>In the alignment, I have always wondered why, after all the time spent adjusting the HET. OSC. coils to<br>the spec, why do we need to start all over again when we do the transmit alignment ??<br><br>Also, in the finals, pins 1, 4 and 6 are tied together between the two tubes, so why the redundancy with<br>three .005 mfd bypass caps on each tube? Would it not be just fine to have only one cap for both tubes<br>instead of six caps ? The tube spacing is so close I see no need for the multiple caps.<br><br> </div> </div> </div></div></body></html>