Optoelectronics Opto 3000A Micro Handi Frequency Counter, 10hz - 3 Ghz

Lodestar Frequency Counter (FC-5250C 10Hz~200MHz) **USED VINTAGE** Turns On

DataScan MODEL C1400 10HZ-1..4GHZ FREQUENCY COUNTER * Untested

Optoelectronics Handi-Counter Model 2810

OptoElectronics Model: FC-50C Frequency Counter Used Working

Optoelectronics Frequency Counter Model 7010A - 600 MHz Untested

Vintage REDCO RFC-50 Frequency Counter Electronics Untested

BK B&K Precision Model 1823A 2.4GHz Universal Frequency Counter PARTS