-turn trimpot.
From: saidj...@aol.com
To: time-nuts@febo.com
Subject: Re: [time-nuts] LTE-Lite module and the pendulum...
Hi John,
while I can't tell you which vendors are affected and which are not (Its
like asking an angler for his secret angling spot :), I can say that most low
cost TCXOs
I've been following this thread with some interest. I have no idea
what a LTE-Lite module is, but I believe the issues being discussed
is essentially the same issue that I had a year or so ago when I had
to make repairs to my two DATUM 9390-52054 GPS references. At that
time I copied this
Burt,
Great insight thanks. You nailed it: out with the old oscillator and in with
one that doesn't have that problem.
Btw the mechanical tuning issue you mentioned is essentially the same exact
problem: even the slightest turn will make the frequency jump too high or too
low. It can drive
Great insight thanks. You nailed it: out with the old oscillator and in with
one
that doesn't have that problem.
Btw the mechanical tuning issue you mentioned is essentially the same exact
problem: even the slightest turn will make the frequency jump too high or too
low. It can drive you
Hi John,
while I can't tell you which vendors are affected and which are not (Its
like asking an angler for his secret angling spot :), I can say that most low
cost TCXOs exhibit this behavior, and are thus not really suitable for
GPSDOs.
The ones we used on the LTE-Lite are quite good
Also have this problem with capacitor-adjusted tuning. No matterhow careful
you turn, stiction causes the adjustment to jump in the direction of the turn.
Don
John Miles
Great insight thanks. You nailed it: out with the old oscillator and in with
one
that doesn't have that problem.
Btw the
for each clock. They'll run
for a long time on those.
Burt
From: Said Jackson saidj...@aol.com
Subject: Re: [time-nuts] LTE-Lite module and the pendulum...
Burt,
Great insight thanks. You nailed it: out with the old oscillator and
in with one that doesn't have that problem.
Btw
described, the DAC sits within about
10 of 27450, and that's where my units are happy. By the way, I've
got two 1.5 KVA UPS's in my shoppe, one for each clock. They'll run
for a long time on those.
Burt
From: Said Jackson saidj...@aol.com
Subject: Re: [time-nuts] LTE-Lite module
Hi
Depending on how much you spend on a mechanical piston trimmer, the innards
will be coaxial to some tolerance. To the extent they rotate or “swing” as one
piece moves in and out of the other, the capacitance will be more linear or
less linear vs rotation of the trimmer.
What you want - a
