1Hz-50MHz Crystal Oscillator Frequency Measurement Meter DIY Kit With Shell

Tektronix PG501 5 Hz to 50 MHz pulse generator plug-in for TM500

EH Research Labs Pulse Generator 132L, Made In England, UNTESTED, SEE DESC.

HP 11708A Reference Attenuator – 50 MHz Low SWR – Cal for 8484A 8481D 8485D

Keysight 8485A Power Sensor, 50 MHz to 26.5 GHz, 1µW to 100 mW, -30 to +20 dBm

Clock Multiplier Module Frequency Multiplier Module 2-50MHz

Pulse Generator with Adjustable Duty Cycle High Power Driver Wide Voltage Range

Bird Electronics Slug