[sdiy] Satisfying DIY

[Tom Arnold]

While not 100% sdiy related ( except that I listen to my music on it ), I
finished rebuilding my Dynaco ST120 amp finally.  I have another one to
finish up which I'll do tonight after I finish my 3031 case project...

I finally did locate some diodes with the proper voltage drop.  I couldnt
find any large caps to fit the space of the original power supply caps, so I
wound up getting modern snap-in's and making PVC rings that fit the mounts,
and gluing the new caps into the rings with silicone.  I replaced every
electrolytic cap, every chunk of silicon, and the two tant's ( with ones with
3 times the original voltage rating... ).  Also replaced ( and uprated )
every 2watt or larger resistor and made sure that any previously warm
resistor or diode was now properly spaced off the board. One thing that was
harder then I expected was finding good transistors.  The MOSFETs I needed
for the power supply ( 2SK1058's ) are tricky to find to put it mildly, and
decent high voltage TO3 case outputs are a little on the scarse side these
days.  Once I found a suitable part, I did find multiple manufacturers, it
was just hard finding a current device to use.

This was extremely satisfying work to do and was just the ticket to get me
in good spirits for working on harder projects.

-- 
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 - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org 
 - SynthGeek        -
 - BBD Fanatic      -  "...is it a virus, a drug, or a religion?" 
 - echo evho wjxo   -    Juanita Shrugs. "What's the difference?" 
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