[hpsdr] Munin 2 Mods

[Dick Faust]

Hi John

Thanks for the kind words.

I have a synopsis of my technique in the first two pages of the General 
Construction Info:
http://www.k9ivb.net/munin2/Munin2_General_Construction_Info_07052013.pdf

The solder that I used was Qualitek Int. Inc. PN 50-30523, Sn60/PB40, 
0.025" dia, RA300 3.3% Flux.

I also have (2), 5# spools of 0.032" Gardiner Solder 2.5% Core from the 
1970's that I also use for everything including SMT.  I believe this is 
also 60/40 Rosin core but it was made before all of the other 
requirements and no other info appears on the spools [I used this in the 
workplace, lab and home - have yet to start the second spool].

The Soldering Iron is a Weller WR-40P [40 Watt] Iron with a ST6 tip and 
a 1N7000 diode that is switched in and out for idle/low power or full power.

Dick K9IVB

John Laur wrote:
> Dick,
>
> Hello; I wanted to give you a shout to say that that is a beautifully
> assembled board! I strive for the same level of quality when I
> populate and solder PCBs, and try constantly to improve.
>
> Can I ask what equipment and solder/flux you used to do the work? I
> currently use a Metcal MX5000 with very thin gauge leaded solder and a
> water soluble flux pen. I clean the boards with a very soft toothbrush
> and anhydrous isopropyl when finished followed by rinsing in tap water
> and then a final rinse with deionized water and a long dry. I am
> considering moving to using solder paste with a dispenser though so
> that I can get the exact same amount of solder on each joint and avoid
> the flux pen; however I am concerned with the costs and the shelf life
> of paste.
>
> Anyway, great job, and I hope the small changes and the rest of the
> board test out A-OK for you.
>
> 73 John KF5SAB
>
> On Tue, Nov 5, 2013 at 1:43 AM, Dick Faust <k9ivb at cox.net> wrote:
>   
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Finally finished construction.
>>
>> I substituted some braid from Belden 9258 0091000 RG-8X which made it much
>> easier to assemble L4 than the RG-58 in the kit.
>>
>> I also used the same braid to replace the four ground straps on T1 and T2.
>> Used about 1.5" of braid and opened a hole in center and inserted the screw
>> with washers, then stretched out the braid.  After mounting T1 & T2, I
>> trimmed the braid before soldering.  This easily accommodates the small step
>> down to the flanges on T1 & T2.
>>
>> A hi res picture here:
>> http://k9ivb.net/munin2/PB040002.JPG
>>
>> Also updated the web page with picture and the replacement parts for C25,
>> C26 & C27.
>> http://k9ivb.net/munin2/
>>
>> Waiting for a part to make the cables so I can start to test.
>>
>> Dick K9IVB
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