[time-nuts] Rubidium Info

Brian Kirby kirbybq at bellsouth.net
Fri Dec 31 20:42:49 EST 2004

Greetings and Happy New Year !

I bought an rubidium assembly off of E-bay, it was sold by a user of the 
name of testege.  Its a 10 Mhz Efratom FRS-C, with TTL output,  and it 
was enclosed in a steel box about 5x5x3 inches.  It had two additional 
boards attached to the rubidium, the first was a socket/plug interface 
to the rubidium, and the second board has a db-25 and 3 each TNC 
connectors.  The user selling it, thought it was a distribution amp.

I believe its either a synthesizer or discipline circuit.  The board has 
an assembly number of 5576ASSY101720-002.  There are two filters on the 
board, one is 15 Mhz, the other is not marked other than on the PC 
board.  A +15 and +5 volt TO220 regulators, a 74HC4538, CD4060, ILD766, 
a PIC marked 101949-001  9500522 by white sticker - the chip is a Atera 
EP610C-25T, several berg jumpers, etc.

Does anybody have any info on the assembly board ?  The seller has 
another unit up for sell, info at 
FYI, I picked mine up for $210 - he charges $25 for S&H.  I removed the 
rubidium from the unit and ran some basic test and it appears to be 
fully functional.

Brian Kirby - N4FMN


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