Can you hear me now... over the fan? -- (Excellent new comment 12/13/2017)
The TI-99/4A section of Mainbyte.com is a great site for any TI'er. There are a some really great ideas for system modifications listed there, both simple and complicated. What really makes this site shine are the HIGHLY DETAILED instructions for the hardware modifications. This place will give even a newbie the confidence to tackle jobs they normally might not have considered.
Now recently I went there looking for a potential new project for my TI, only to be reminded that I've been neglecting my backup box. If anything ever happened to my primary box, I'd still want to maintain my hearing and sanity... so it was time to finally install the fan that had quite literally been sitting on my shelf for months.
I did not go into a lot of detail here, as the project is very well documented on the Mainbyte site.
When I opened up my P-Box, I was pleasantly surprised to see that it was not very dirty. I guess this box got little use over the decades.
THE "LOUD MONSTER"
Thanks to Mainbyte, the connection point is EASY to find!
As you can see, there is plenty of room to work there, so even if you're a newbie or messy with a soldering iron, chances of a solder bridge are low. Just check your work afterwards.
CLOSEUP OF CONNECTIONS
The fan I purchased did not have RED and BLACK wires, so if you lose track of the wires, this model fan will NOT operate when you turn on the P-Box... until you hook it up correctly!
The fan installed is only 15 Decibels! I simply cannot hear it, but that might be my old age setting in. Anyway, the disk drive makes more noise than the fan!
If you've not yet installed a fan in your P-Box(s) yet, you might want to give it a shot.
PEB Disassembly & Fan Project.pdf (509.34KB)