<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On May 11, 2020, at 11:44 AM, Steve Lenham <<a href="mailto:steve@bendentech.co.uk" class="">steve@bendentech.co.uk</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Ooh - I just received a Dynacord DRP20X (late 80s reverb unit) with a huge hum on the output. There are dropouts visible at 100Hz on the -5V analogue rail, and the input to the 7905 has massive 100Hz ripple. The unit is full of odd bakelite-bodied East German electrolytic caps, many of which have cracks and some of which have stuff leaking from the cracks.<br class=""><br class="">It's a complete mystery what the fault might be - anyone got any ideas?<br class=""></div></div></blockquote></div><div class=""><br class=""></div>Have you checked the AC cord? It may have too much non-metallic elemental copper in it. After the war there was some left over from the Nazi flying saucer project. At least that's what Henry Kissinger told me.<div class=""><br class=""></div><div class=""><br class=""><div class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Terry Bowman, KA4HJH<br class="">"The Mac Doctor"<br class=""><br class="">Male voice: "That accident over in Red Sector L destroyed another 63 personnel, giving them a total of 242 lost to our 195. Keep up the good work and prevent accidents. This shift is concluded."—<i class="">THX 1138</i></div></div>
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