[time-nuts] 5061A Beam Current went high

Pete Lancashire pete at petelancashire.com
Mon Aug 22 15:02:36 EDT 2016

I fired up my old 5061A about 3-4 times a year to keep the tube pumped
down. I usually run it for 1 to 2 hours to keep it pumped down.

This time was different,

My GPSs have been off the air from getting a new roof and not being in any
rush to get the antennas back up, etc.

So ... I wanted to calibrate a couple devices for a friend and fired up the
5061A, got it locked "Green Light" and gave him a call.

Up until now, beam current for me has been about 8-10 when peaked. The
number recorded on the door is 19.

He got delayed, and showed up about 8 hours later. We went to the lab, and
the green light was still on, BUT the beam current was around 30.
Everything else was where it was normally which is pretty much was was
recorded on the door long ago.

Any ideas of what I should look for first, before starting from the power
supplies and checking everything ?


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