[hpsdr] Munin2 heat sink

[Tim ORourke]

Here is what I did:
1. I mounted finals direct to heatsink and spaced PC board up 4mm.
2. I milled a pocket 3mm deep for T220 devices.

Tim W4YN 

-----Original Message-----
>From: MDS Info <info at mds-ham.com>
>Sent: Jul 22, 2015 2:40 PM
>To: HPSDR <hpsdr at lists.openhpsdr.org>
>Subject: [hpsdr] Munin2 heat sink
>
>***** High Performance Software Defined Radio Discussion List *****
>
>Hello,
>
>I am using my own heat sink on the Munin2 construction.
>
>From my measurements, a 0.345" standoff is required for the circuit board.
>
>Can anyone else confirm this?
>
>When I lay the pcb on the copper bar, and drop in the mosfet, the top of the
>drain is 0.1"
>above the pcb, and drain tab is about 0.005" thick...hence 0.25" thick bar +
>(0.1 - .005).095"
>
>???
>
>BTW, almost everyone's pcb's were shipped Monday, first class.
>
>73's
>
>Glen K4KV
>
>
>
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Tim O'Rourke 
W4YN at 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