<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="">Thanks for the suggestions, gang. <div class=""><br class=""></div><div class="">The link in the OP is to a board with a 6E2 (EM84) tube and socket. I should have given the link to the 6E5S version which requires significantly more current and has a suitable heatsink installed:</div><div class=""><br class=""></div><div class=""><a href="https://www.ebay.com/itm/193443008361" class="">https://www.ebay.com/itm/193443008361</a></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">That's the tiny heatsink I'm looking for. Unfortunately, I've now realized that some of the boards I've bought are slightly different and have almost no wiggle room. The only practical solution would be to replace the existing TTR and MOSFET so that a vertical heatsink can be used. I suspect that it would have to be smaller than usual...</div><div class=""><br class=""></div><div class="">Here's the cheaper (and cheapest) board I'm referring to:</div><div class=""><br class=""></div><div class=""><a href="https://www.ebay.com/itm/191011269169" class="">https://www.ebay.com/itm/191011269169</a></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">$12.90 and free shipping? With through-hole parts and only requires common sockets?? If you're interested in putting a Magic Eye in a synth module this is the ticket. There is, of course, RFI from the HV PS to contend with.</div><div class=""><br class=""></div><div class="">Going partially off-topic...</div><div class=""><br class=""></div><div class="">I got into Nixie tubes and other vintage cold cathode indicator technologies several years ago and purchased a lot of Soviet surplus from sellers in Ukraine right before the prices started going through the roof. Some of you may recall the "Plasma VU-Mete" module that Marc Bareille published a while back:</div><div class=""><br class=""></div><div class=""><a href="http://m.bareille.free.fr/vu-in13/vumeter_in13.htm" class="">http://m.bareille.free.fr/vu-in13/vumeter_in13.htm</a></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">The price of IN-13 tubes has skyrocketed since the last update to that page in 2012. The "too difficult to use" IN-9 remained cheap for a while but in just the last year they've undergone an even more meteoric rise in price. This is partially because getting them to work reliably has finally been worked out. The purple ones that Marc used...unobtanium. </div><div class=""><br class=""></div><div class="">A few months ago something reminded me of "Magic Eyes". It occurred to me that I might have just enough time left to catch the last train out of MagicEyeVille so I've been studying up on them as quickly as possible, scouring eBay for bargains, and snapping up everything I can before it's too late. Hence this topic.</div><div class=""><br class=""></div><div class="">If you're interested in this sort of thing contact me privately by email. I can point you in all the right directions and save you a lot of the trouble I had. I need to write up everything I've learned about all of this stuff on my blog but there just hasn't been enough time to focus on it.</div><div class=""><div><br class=""></div><div><br class=""></div><div class="">
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Terry Bowman, KA4HJH<br class="">"The Mac Doctor"<br class=""><br class=""></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><a href="https://www.astarcloseup.com" class="">https://www.astarcloseup.com</a></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""></div><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">“...the book said something astonishing, a very big thought. The stars, it said, were suns but very far away. The Sun was a star but close up.”—Carl Sagan, "The Backbone Of Night",<span class="Apple-converted-space" style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"> </span><i style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Cosmos</i>, 1980<br class=""><br class=""></div></div></div></div></div>
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