transistorize

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To equip (an electronic circuit or device) with transistors.

Wiktionary

1. v. transitive To equip an electronic circuit or device with transistors, especially to convert a device using an older technology to the use of transistors, particularly to make it smaller or more portable.

WordNet 3.0

1. v. equip (an electronic circuit or device) with transistors