Am 2022-07-13 4:10, schrieb glenlist via time-nuts:
Oh and now LED lights overhead your bench which are driven at 5-50kHz
are are next new coupling of noise into your open bench circuits !!!
The LED ringlight on my microscope creates 57KHz noise peaks when I have
an unshielded low noise
Am 2022-07-10 9:11, schrieb Erik Kaashoek via time-nuts:
@Bob,
You mentioned "dual supplies with high voltage" for the first gain
opamp. How much impact would dual voltage bring as its a pain to
implement.
I think is was Rubiola who wrote that he exploded a costly microwave
mixer
with a
Am 2022-06-08 21:53, schrieb Tom Van Baak:
Would it be advantageous, then, to run a high-performance laboratory
oscillator at its lower turnover point? Or at -78 C (CO2) or 77 K
(liquid Nitrogen)?
I have no idea about the crystal itself. Maybe Bernd or the SC
(SantaClara)
veterans can help?
Am 2022-06-08 13:27, schrieb Magnus Danielson via time-nuts:
As far as I remember and know, you can achieve about the same
phase-noise properties as you hit about the same bandwidth from the Q,
and noise contribution is about the same. So, it boils down to do the
supporting amplifier well.
Am 2022-06-02 19:55, schrieb K5jv via time-nuts:
On a different subject: A couple of month back I got some strong
criticism about suggesting that the oven in the Z3801A was a potential
source of problems. I just got another Z3801A in for repair. Same
symptoms as before; appears to turn on
Am 2022-05-26 17:24, schrieb Richard (Rick) Karlquist via time-nuts:
VNA's of any kind (no matter how small their size) don't work well on
components that are too far away from 50 ohms, at least if
you make a simple minded s11 smith chart measurement. There
are complicated work-arounds for
Am 26.02.20 um 10:24 schrieb Tom Van Baak via time-nuts:
I'm pretty sure that I've seen one-off surplus 10.23 MHz or 5.115 MHz
OCXO on eBay but I never thought to bid on them because the frequency
was strange. If you saw one, and "bought before you thought", let me
know.
IIRC someone has
I had a Morion MV89A that would stop oscillating when Vtune was more
than +600 mV.
So I cut it open to recover at least the crystal, for own experiments.
Pics are there:
<
https://www.flickr.com/photos/137684711@N07/49585174873/in/album-72157662535945536/
>
and then following the right
