Chuck
I suspect it actually is for you. As you say you now have a great deal of
insight that you did not before and as I have often read here. Its funny
how we have all learned about the nasty effects of age. Ahhh I mean
equipment that is.
So I would bet you could get it going. The RB elements in
I bought several of these, 19.5 V 4.75A power supplies from user
shunwei2014 on the auction site.
http://www.ebay.com/itm/201159335516?_trksid=p2057872.m2749.l2649ssPageName=STRK%3AMEBIDX%3AIT
I have no association other than being a customer.
One of these power supplies freed my lab power
The fault was found by somebody with a heck of a lot more experience than
yours truly.
Turns out the 5v regulator had shorted out, a protection diode did it's
thing and popped the fuse protecting the rest of the system.
J.
On 29 Jul 2015 2:49 am, Robert LaJeunesse lajeune...@mail.com wrote:
Hi
A few thoughts:
On Aug 1, 2015, at 9:34 PM, Bob Stewart b...@evoria.net wrote:
Hi Bob,
I believe that the approach I used in the example plot I linked in the other
post was PPS to ext/arm, GPSDO 10MHz to start, Cs 10MHz to stop. So, is this
a methodology issue, then?
Is the pps from
In message 1502052008.304624.1438465781711.javamail.ya...@mail.yahoo.com, Bob
Stewart writes:
Here's an example of what I'm talking about. See description and
notes. The blue trace is the one using the clock in the 5370A.
The other tests match pretty closely down to around 60s or so.
[I could not see this echoed by the server on the 1st try. ]
Am 28.07.2015 um 03:58 schrieb Bill Byrom N5BB:
[ nice and understandable summary of the Lee / Hajimiri ideas ]
OTOH with this Dirac-style resonator feeding, one collects the
noise sidebands from order 1 to MAXINT and one needs to
Hi Poul-Henning,
On 08/01/2015 10:32 PM, Poul-Henning Kamp wrote:
In message 49c4ccd3-09ce-48a4-82b8-9285a4381...@n1k.org, Bob Camp writes:
The approach you are using is still a discrete time sampling
approach. As such it does not directly violate the data requirements
for ADEV or
Hello,
Does anyone know model of MMIC that is used in output stage of 15 MHz amplifier
chain in Lucent Rb units? It is pretty large ceramic case with gold
plated covers. For example, it is U4 on a following board photo.
http://www.makarov.ca/images/rubidium/Lucent%20011.jpg
The same MMIC was
Hi,
For the measurement of Allan Deviation my configuration consists of a HP53132A
and TIMELAB.
I verified that the best resolution is using the universal counter as a
frequency counter.
Using the time interval counter with 1 PPS input is definitely has a more
precise measurement but the
Hi,
I have seen, but I do not remember where, someone have rebuilt the external
oven controller to complete a stand alone OCXO removed from an HPZ3801A.
Can you hep me to find the document?
Luciano
timeok
Message sent via Atmail Open - http://atmail.org/
Hi, Just thought I'd share some info on repairing a defective HP 5065A
lamp oven.
These ovens can fail either shorted to the oven cylinder
or have interwinding shorts.
I have repaired three optical units so far with this failure.
The original winding was insulated twisted pair wound
directly
Thanks Chuck and Bob for the further comments. I have actually had a reply
from Sematron. Seems that the lamps are still available at only £781.63 - call
it $1,100! Since that probably buys four Racal 9475s when they appear, I think
I might go the other route. I also think that the lazy
Interesting video.
http://hackaday.com/2015/08/01/everything-you-wanted-to-know-about-oscillators/
-=Bryan=-
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Hi
On Aug 2, 2015, at 3:18 AM, tim...@timeok.it wrote:
Hi,
For the measurement of Allan Deviation my configuration consists of a
HP53132A and TIMELAB.
I verified that the best resolution is using the universal counter as a
frequency counter.
True, but the counter “lies to you in
Hi
The “external” heater on the Z3801 OCXO is only needed if you are regularly
running below -20C in your environment. Other than
the alarm signal, there is no harm in letting it simply shut off forever.
Bob
On Aug 2, 2015, at 8:56 AM, tim...@timeok.it wrote:
Hi,
I have seen, but I do
On Sat, 1 Aug 2015 18:18:18 -0700
Bryan _ bpl...@outlook.com wrote:
http://hackaday.com/2015/08/01/everything-you-wanted-to-know-about-oscillators/
Yes, not too bad. But when you actually want to know what makes
an oscillator tick, i would rather recommend [1] as a treatment
of general
These are better summary papers :
http://www.qsl.net/va3iul/Phase%20noise%20in%20Oscillators.pdf
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.309.5449rep=rep1t
ype=pdf
73 de Ulrich N1UL
In a message dated 8/2/2015 6:24:05 P.M. Eastern Daylight Time,
In message 55bdb002.8060...@rubidium.dyndns.org, Magnus Danielson writes:
For true white PM *random* noise you can move your phase samples around,
but you gain nothing by bursting them.
I gain nothing mathematically, but in practical terms it would be
a lot more manageable to record an
well, the Pierce oscillator does not give that much freedom, the steady
state loop gain should be Pi (about 3) as the RF Gm = Gmo/pi.
This analysis does not address the important SSB noise gut guaranties
oscillation.
In testing enough a loaded Ql of Qp/2 is best for power
Hi
That’s about the right price relative to the last time I bought any of them.
Bob
On Aug 2, 2015, at 10:33 AM, Mike Niven mfni...@ymail.com wrote:
Thanks Chuck and Bob for the further comments. I have actually had a reply
from Sematron. Seems that the lamps are still available at
The main oven on my 5065A was made with a bifilar winding of enamel
covered nichrome wire wound directly on the aluminum oven. To cancel
the magnetic field, the far end of the coil was shorted, making the
heater a hairpin loop No twist that I recall... The enamel was
compromised somewhere
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