I have had some success refilling vintage plotter pens for the Casio, Sharp, and Radio Shack printer plotters. After quite a few trials and errors, I might have finally solved the refill challenge.
Tag: TRS-80 PC-2
The RS-232 interface for the Radio Shack PC-2 along with the CE-158 for the Sharp PC-1500 are difficult to find these days. These added possibilities to connect to printers, modems, save load programs faster and more. Luckily the CE-158X has been released.
After successfully connecting a TP-10 to the Model 100, I did the same with the PC-2. I also updated the banner program for the PC-2. This gives the PC-2 the ability to print without needing those expensive plotter pens.
I took my Radio Shack PC-2 (Sharp PC-1500) out of the archive and restored a Sharp CE-150 plotter / cassette interface. I was able to connect the PC-2 to a TNC and print out APRS traffic.