[time-nuts] Odd FTS 4060 Behavior

Stanley Reynolds stanley_reynolds at yahoo.com
Sat Jun 12 15:40:35 UTC 2010

 Pure speculation from a shade tree time-nut:
As my tube became weaker the unit became heat sensitive and would stay locked if I keep the room cooler. It also did better on battery power vs the internal supply. I attributed this to signal to noise level changing as the the tube aged.

----- Original Message ----
From: Adrian <rfnuts at arcor.de>
To: time-nuts at febo.com
Sent: Sat, June 12, 2010 10:03:15 AM
Subject: [time-nuts] Odd FTS 4060 Behavior

I have a FTS 4060 Caesium Frequency Standard that I never managed to get working properly.
When powered on, it locks properly after some 10 minutes and keeps running until it jumps off by about +1E-7. That is, the 10 MHz output then reads 10,000,001 Hz, and the red alarm light is on.
When I tried it yesterday again, it worked for about 2 hours before the shift appeared. Oddly enough, the green 'Locked' light was still on. This happens every 2...20 hours.

Any ideas what could cause that failure?


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