Select ENIG finish for gold plated edge contacts.

Requires an SOIC-28 test clip for programming.

This is ONLY for TRS-80 Model 100, 102, or 200, because of the non-standard pinout.

For other applications that use the same socket but with a standard pinout (TANDY 600, Epson PX-8, PX-4, etc), you don't need a PCB like this, you can just use a standard UV-erasable ceramic DIP-28 27C256 directly with the normal Molex 78802 carrier without any PCB. See the Molex78802_Module github link below for a 3d-printable standard DIP-28 carrier. Or if you still want the electrically erasable 28C256 without UV, see the "Meeprom" version of this module.

FOR THE CARRIER:

See Molex78802_PCB_28.stl below.

Select material: PA12 or HP-PA-12

On PCBWAY,

"PA12" means SLS printing white nylon and you can optionally add a dye color.

"HP-PA-12" means MJF printing black nylon.

I do not recommend any smoothing/polishing post-process, or paint, but dye is ok on the white nylon.