<head><style>body{font-family: Geneva,Arial,Helvetica,sans-serif;font-size:9pt;background-color: #ffffff;color: black;}</style></head><body id="compText">I made several for the original Munin run of boards.<br>Are the mounting holes different than original?<br>If not I may still have one or 2 around.<br>I did not use a copper plate, Kjell had told me that aluminum heat sink was adequate.<div>I did mill out areas for finals and only mounted PC board maybe 2.5- 3MM (metric is only measurement system I use) above heatsink.</div><div>I still have some spacers around and can measure them tonight and post a picture of heatsink if anyone is interested.</div><div>Copper or no copper became a long topic last go round!</div><div>Tim W4YN<br><br>-----Original Message-----<br>>From: George Byrkit <ghbyrkit@chartermi.net><br>>Sent: Jul 22, 2015 4:28 PM<br>>To: 'MDS Info' <info@mds-ham.com>, 'HPSDR' <hpsdr@lists.openhpsdr.org><br>>Subject: Re: [hpsdr] Munin2 heat sink<br>><br>>***** High Performance Software Defined Radio Discussion List *****<br>><br>>It just might be metric! After all, it was designed by someone in Europe, and the US is<br>>pretty much the only country where we'd be talking about inches and fractions thereof,<br>>rather than metric measurements.<br>><br>>Personally, I think the US should produce stuff in metric much more than it does, because<br>>it would be more acceptable to a wider audience, and maintainable without having to have a<br>>second set of rarely used tools (like those Imperial nut drivers). I have come to this<br>>conclusion previously after 15 years in BioTech, where the poor field service guys had to<br>>have both Imperial and Metric tools to service equipment. And when we closed a facility<br>>in the UK, and brought production back to the US, the mechanical engineers redimensioned<br>>everything to Imperial, and made all kinds of errors!<br>><br>>73,<br>>George K9TRV<br>><br>>-----Original Message-----<br>>From: Hpsdr [mailto:hpsdr-bounces@lists.openhpsdr.org] On Behalf Of MDS Info<br>>Sent: Wednesday, July 22, 2015 2:41 PM<br>>To: HPSDR<br>>Subject: [hpsdr] Munin2 heat sink<br>><br>>***** High Performance Software Defined Radio Discussion List *****<br>><br>>Hello,<br>><br>>I am using my own heat sink on the Munin2 construction.<br>><br>>From my measurements, a 0.345" standoff is required for the circuit board.<br>><br>>Can anyone else confirm this?<br>><br>>When I lay the pcb on the copper bar, and drop in the mosfet, the top of the<br>>drain is 0.1"<br>>above the pcb, and drain tab is about 0.005" thick...hence 0.25" thick bar +<br>>(0.1 - .005).095"<br>><br>>???<br>><br>>BTW, almost everyone's pcb's were shipped Monday, first class.<br>><br>>73's<br>><br>>Glen K4KV<br>><br>><br>><br>>_______________________________________________<br>>HPSDR Discussion List<br>>To post msg: hpsdr@openhpsdr.org<br>>Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org<br>>HPSDR web page: http://openhpsdr.org<br>>Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/<br>><br>>_______________________________________________<br>>HPSDR Discussion List<br>>To post msg: hpsdr@openhpsdr.org<br>>Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org<br>>HPSDR web page: http://openhpsdr.org<br>>Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/<br></hpsdr@lists.openhpsdr.org></info@mds-ham.com></ghbyrkit@chartermi.net></div></body><pre>
Tim O'Rourke
W4YN@ARRL.Net
Low Power Amateur Radio Rocks
Member of Flying Pigs,ARCI,GQRP,RSGB,ARRL Life Member
R/C Pilot (sort of)
NRA Life Member
NRA Certified Rifle, Pistol, Black Powder Instructor, Range Officer </pre>