repair

A few years ago I picked up this little gem of an amp at a gun show for a paltry 25 bucks.  Not a bad snag!

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vintage!

It worked great, except the volume knob didn’t seem to do much… it always sounded like it was on full blast.  So, I brought it down to Skullspace to tinker with it.

Aside from the potentiometer not really changing the volume, it was also quite scratchy when changing volumes.  This is usually a sign of a worn-out potentiometer, so I ripped out the old one and temporary wired up a replacement off ebay.

Doing a test run with alligator clips

I carefully tested the amplifier (you really dont want to touch the high-voltage tube supply wires in there when it’s powered…) and it sounded way better than before!  I deemed it a success and installed the new potentiometer, still with test connections:

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Dry fit before everything gets soldered

Everything seemed to work alright, so I soldered everything in place:

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hand-wired goodness

The only issue I faced was that the old wires did not really wick up the solder so well.  I suspect there are some poor connections because of this, but for now it works… maybe some proper flux paste would work better than rosin-core solder?

 

Stay tuned for an audio clip!

What do you do with a busted laptop?  Many people are quick to throw them away.  Others turn them into FreeNAS boxes, or other useful servers.  For the machine I inherited today, I decided to turn it into an all-in-one style desktop PC.  The screen still worked, it was able to boot windows – the only trouble being that it was in physically rough shape.

 

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Ouch…

Basically, the screen had become detached from the rest of the machine – but all the cables were still in place for it to function.  After some light tweaking, I was able to get the screen to flip around the body of the laptop and sit flat on the reverse side:

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But how to keep it in place?  Being impatient and lazy (usually a dangerous combination), I tried my lucking using an entire roll of electrical tape to keep it all together.  Because why not?

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Partway through the taping

Being that this thing is going to mount against something on the reverse, I removed the keyboard as well.  So it’s not bumping its keys into stuff all the time.

As luck would have it, I had an old monitor stand kicking around – works as a nice little kickstand. Not perfectly stable, but still more solid than I was expecting:

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Starting to take form…

Now all that’s left is to wipe the old Vista install and put on a fresh OS…

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Tape starting to lift in the top-right corner, this was later fixed. The answer, of course, was more tape.

A few hours of tinkering, an old laptop, some electrical tape, and a fresh Xubuntu install made for a perfectly good bedroom workstation.  Not bad for one night!