https://sfbay.craigslist.org/sby/ele/d/san-jose-fisher-50-two-mono-tube-preamps/7911681106.html
Fisher 50-C Two Mono Tube Preamps - electronics - by owner - sale - craigslist
For Sale: Fisher 50-C-3 and Fisher 50-C Tube Preamps. What: Two Fisher MONO preamps. One is a 50-C-3 (older) and the other a 50-C (newer). Both have recently...
tube preamps
https://victor-custom.com/
Victor Custom Workshop - tube guitar amplifiers and preamps
Custom-made studio equipment: Tube guitar, bass guitar, studio equipment. Tube amplifiers, preamps, lotions, compressors, saturators and other devices for...
custom workshopguitar amplifiersvictortubepreamps