So apparently there’s this neat thing you can get for a few bucks called a capacitor discharger which does what it says on the tin without making sparks and pockmarks in my screwdrivers?? Who knew.
Immediately bought a bunch to give to friends.
Patching 68K Software – SimpleText
https://tinkerdifferent.com/threads/patching-68k-software-simpletext.4793/
#HackerNews #Patching68K #SimpleText #Software #Development #RetroComputing #Tinkering
If you don't tinker, you don't have taste
https://seated.ro/blog/tinkering-a-lost-art
#HackerNews #tinkering #art #creativity #innovation #craftsmanship #taste
I 3D printed a laptop / polymatt
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I opened up the one with the issues to have a look, and happily, the input section is on a separate board! Well then, hopefully I can swap it out for the input section from the newer unit, to A, confirm that the input section was the problem, and B, get the better amp fully working.
I removed the suspect input board and immediately my eye was drawn to these semitransparent yellow polymer caps. I can’t say exactly why, but I don’t trust them.
…
3/
I then went and opened up the other unit, and pulled out the input board. Under all the dust, a few things became apparent.
First, they revised the design to remove the stupid metal tab that you had to bend to be able to remove the input board without taking every other board out first. Nice.
Second, the only noticeable revision to the input board was replacing those exact yellow capacitors with a different kind of film/poly cap. Aha! Vindication perhaps?
Anyway, I was able to swap the newer input board into the older amp (after removing all the dust).
And then test, and yay! It worked great!
Nice quiet fans achieving plenty of airflow, chassis doesn’t get hot, no input popping. This 20-year old amp is ready for another decade or two of service, I hope.
And maybe I’ll get some filter foam over the front intake…
Mike [SEC=OFFICIAL]
boosted
I wrote a quick blog post about my Soldering Fume Extractor v4 finally.
It's a relatively cheap (~AU$120), compact, effective and quiet fume extractor, that uses cheap off-the-shelf filters.
Anyone who's interested in making one, check it out. If there's more interest I'll see about building a v4.5 with stronger 7mm ply.
I wrote a quick blog post about my Soldering Fume Extractor v4 finally.
It's a relatively cheap (~AU$120), compact, effective and quiet fume extractor, that uses cheap off-the-shelf filters.
Anyone who's interested in making one, check it out. If there's more interest I'll see about building a v4.5 with stronger 7mm ply.
Had a dead Soundcraft Ui12 needing repair. Was browning out any PSU connected.
Ruled out the CPU board and DSP board, meaning it was the analogue board.
Sheesh, three factory bodges! Early unit I guess?
Running it current-limited, the inductor for the 48V phantom power boost converter was getting warm.
desoldered the caps, and despite being bodgy, they weren’t dodgy.
Desoldered (and broke, whoops) the inductor just to confirm it was this section. Yep, board works fine without it! Next I need to find a replacement for this boost driver chip. And the jellybean inductor.
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fuck yeah, just made a huge breakthrough in reverse-engineering this 20-year-old software implementing an undocumented protocol by Yamaha for remote head-amp gain control, without having one of the other end devices to test with!
#Tinkering#s0Projects
