[Test-Equipment] HP-606A Calibration question

Barry n4buq at knology.net
Mon May 25 23:00:42 EDT 2009


Hi,

I'm new to the list and have been working on cleaning and calibrating my "new" HP-606A.  I read a thread on this list a month or so ago about a problem these generators can have where they are out of calibration towards the center of dial (discussion about bending the fins of the tuning cap, etc.).

I set the end points on mine and am seeing this quite noticeably.  In fact, on the 530kc - 1800kc range, it jumps out of calibration almost immediately upon moving away from the upper endpoint.  Here's what I just measured:

Dial - Actual
 530 -  530
 600 -  601
 700 -  710
 800 -  820
 900 -  933
1000 - 1040
1100 - 1147
1200 - 1250
1300 - 1352
1400 - 1460
1500 - 1561
1600 - 1655
1700 - 1735
1800 - 1800

Is there a recommended fix for this?  I don't plan on bending the tuning cap (it is pristine from 1968) and will rely on a counter for accuracy anyway, but would like to have the dial a lot closer to calibration over the entire range if possible.

Also, does anyone know a source for the BNC panel mount output jack?  Mine has taken a slight hit and has a flat spot on it.  I don't quite see this style of connector anywhere (it has a threaded ID on the rear that accepts the threaded plug and that includes the female brass connector part).  I'd like to replace this if possible.

Thanks,

Barry - N4BUQ


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