- 2022
- Mar
- 23
Just because it fits doesn’t mean it will work…
One of the things you have to deal with while using old equipment is ancient batteries.
This 1985 Kaypro 2X+88 machine has an early real-time clock, but hasn’t kept time for the better part of two decades.
Interestingly, the battery (the yellow cylinder in the right of the picture) was still available as an off-brand replacement. Voltage checked ok, but soldering the battery on the board resulted in a no-boot condition. The battery was removed and the board completely cleaned of any flux before re-installation and successful boot.
I’m not sure what happened here, but that’s another danger of old equipment - stuff may just not work anymore. I assume that either the little bit of flux on the board was causing issue, or perhaps the clock chip is now damaged from the long-term low voltage. In either event, I need to see if I can get a NOS clock chip before replacing the battery with an off-board 3V pack made up of standard alkalines.
The machine seems happy, and has been sitting at directory for quite some time.
This post is from my LinkedIn profile, you can view it here:
- 2022
- Mar
- 23
Don’t overlook the power cord.
One of my pieces of bench equipment needed some minor maintenance recently.
This Eico 147A Signal Tracer, used for tracking audio down in equipment as well as pulling a demodulated signal off AM circuits, needed a new line cord. There really wasn’t a lot to do here save to be careful when working around older components.
The device itself is very clean inside, and appears to have seen very little actual use before my acquisition. As you can see by the picture of the cord itself, it was well past time for replacement.
This post is from my LinkedIn profile, view it here:
- 2021
- Jul
- 20
Getting set up.
Welcome to Projects from the bottom drawer and wereboar.com. This blog used to be hosted on pygg.xyz, and was hosted on blogger.com before that. Pygg has since been relegated to a (poorly performing) redirect to here, and the blogger links are long gone.
If you’ve arrived at this page by scrolling through my blog, thank you. This is currently both the beginning and end, check back soon for more posts about hamfests, projects, and the random ramble about tech things.
If there’s something you’d like to see more of (or less!) then LinkedIn is a good way to contact me. If you’d like a more user-friendly venue, you can find me on Mastodon. That avenue is fairly new to me, it will generally follow new posts as they appear here, with comments and conversation.
I also post infrequently on satellite.earth, a nostr instance. This is a federated, decentralized social network that doesn’t limit what you can see. Anyone can post in this forum (with signup,) check it out if you’re interested.
Again, welcome, and thanks for stopping by. See you at the hamfest!