AR-40A

Accubeat AR-40A is a compact 10 MHz rubidium oscillator frequency reference standard similar to the Symmetricom SA22.c and performs comparable to 24V standards from the same era, such as the Efratom LPRO-101 or SRS PRS-10.  It is more compact and generates far less heat than other standards.

Case is clean and prepped for a new thermal pad. Includes heatsink, 15V power supply and serial interface cable. These units do not require a heatsink for operation but it is recommended.  This heatsink is custom made to maximize contact with the surface area of the standard.

This unit is calibrated April 2025. Four-hour bench tests measures ADEV 1.01E-11 and Δf/f -2.13E-11 at τ 2000 seconds and average time 10,000 seconds, respectively.

Note the interface has a Molex 43025-0408 connector (Micro-Fit 3.0 receptacle housing, dual row, 4 circuits with 3mm pitch). The included power supply has a conventional 2.1mm barrel plug connector.  You will need to wire up a mating Molex connector (43020-0401) or simply cut it off and splice in this or another PSU.  It is a nice interface cable so I chose to include it unmodified.

Serial 1704