[time-nuts] Re: Sulzer 5B Quartz Frequency Standard Questions

[paul swed]

Agree with Martin and will add one more bit that I believe is the case. The
cap is a glass cylinder that a piston goes into or out of. The outside of
the glass is coated with metal. The cap is relative and in reality I may
guess with age you are bottomed out at 2 turns.
If thats the case look at the circuit and you need to add some capacitance
to get the cap back in the middle range. The numbers are just relative. Not
a big deal to get it semi-recentered.
Paul
WB8TSL

On Tue, Mar 19, 2024 at 12:16 AM Martin VE3OAT via time-nuts <
time-nuts at lists.febo.com> wrote:

> Hi, Stan,
>
> I read the digest so others might have already answered one of your
> questions.
>
> The copper rod and outer cylinder are not "contacts" but instead are the
> "plates" of a small capacitor that is used the change the resonant
> frequency of the crystal in the oven.  Turning the dial on the front
> panel changes the amount of engagement of the copper rod inside the
> outer cylinder, thus changing the capacity between these two "plates".
> It's that simple.
>
> Have fun!
>
> 73,
> ... Martin   VE3OAT
>
>
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