Hi
There happen to be *some* AT cut based OCXO’s that beat the typical
SC cut on warmup … just saying …. :)
Bob
> On Jun 9, 2022, at 9:03 AM, Bruce Hunter via time-nuts
> wrote:
>
> My only experience with SC-cut crystals is that time base oscillators in
> later EIP/Phase-Matrix counters wit
Yes, that transformer sure looks burned out. It's hard to tell how big
it is from the pictures, but my impression is that it looks kind of
skimpy to run a FRK Rb plus whatever else is going on like a GPS RX and
uP system, and maybe battery charging too. You can easily estimate the
VA rating by
Quoting jung.schorndorf--- via time-nuts, who wrote on Thu, Jun 09, 2022 at
04:26:08PM +0200 ..
hello Helmut,
> power supply unit for the GPS frequency standard
> from DATUM (Type MFS Modular Frequency Systems), I visited your homepage and
> registered on "time-nuts" mailing list.
> .
> May I as
On 6/9/2022 10:03 AM, Bruce Hunter via time-nuts wrote:
My only experience with SC-cut crystals is that time base oscillators in later
EIP/Phase-Matrix counters with SC-cut crystal oscillators seem to warm-up from
a cold start and stabilize more quickly than earlier AT-cut versions. I was
s
Yet another interesting time nuts conversation.
A few comments:
1 A number of comments stated as a "fact" that
higher unloaded Q for the resonator
corresponds to lower phase noise. This
idea evidentially comes from looking at analysis
of a so-called free running oscillator with a simple
LC ta
Helmut.
Welcome to time-nuts.
Your pictures are very helpful.
May I suggest the easiest possible answer?
Simply supply 24 volts to the back connector. Guessing 4 amps.
If the system works you just have the AC supply to figure out.
Figuring out the AC supply seems reasonable as it appears from the p
My only experience with SC-cut crystals is that time base oscillators in later
EIP/Phase-Matrix counters with SC-cut crystal oscillators seem to warm-up from
a cold start and stabilize more quickly than earlier AT-cut versions. I was
surprised to see from Jeff Cartwright's paper that SC-cut cry
Hi,
The ability to stabilize at that temperature is indeed an issue. While
the resonators Q shift, the loaded Q I would not expect to shift as
much. Futher, the noise of the supporting amplifier also needs to be
reduced. Naturally, the design could be adjusted to the different condition.
I'v
