[time-nuts] Query about 4060

[paul swed]

Jim
I am no expert on the FTS units. I have a 4050.
But that could indicate 2 possible other answers. The small rise is
actually one of the minor lines and you are not hitting the peak. But if
you have a gpsdo and match the oscillator to that in open loop then the
peak should be right there. Or the second really bad answer. The tube.
Many other issues can cause trouble. RF level to the tube....
Best of luck to you and let us know what you find.
Regards
Paul

On Wed, Aug 12, 2020 at 11:05 PM AC0XU (Jim) <James.Schatzman at ac0xu.com>
wrote:

> Time-nuts-
>
> It has been a couple of years since I last worked on a 4060 so I have
> forgotten some of the details. Can someone remind me?
>
> Operating the device in manual mode, I can adjust beam gain so that I get
> a reading. However, ramping the control voltage over its range (which does
> sweep the output below and above 10 MHz), the gain needle hardly moves on
> the front panel. Measuring  with a DVM on test point E26, it does seem that
> the voltage increases a bit as I tune through 10 MHz, but the voltage seems
> a bit unstable, and the unit won't lock up automatically.
>
> I am going to check the power supply for open capacitors next.
>
> Is there anything else I should be checking towards diagnosing the problem?
>
> Thanks in advance-
>
> Jim
>
>
>
>
>
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