ehydra wrote:
I think the confusion is now perfect:
http://www.mikrocontroller.net/topic/207061#2059725
Let Google translate it from german to your language.
Does the difference come from voltage vs. power spectrum?
Yes, integrating the power spectrum of white noise produces flicker
noise
Paul,
On 13/02/11 04:27, paul swed wrote:
Well pretty good news
The lamp voltage went from 1.83 volts a dead bulb to* 8.9 volts a new bulb*.
By adjusting the oscillator I can get to 9.6 volts but I know the the
oscillator will not start correctly at 82 Mhz its happy at 92 Mhz.
This is good
On 13/02/11 07:11, ehydra wrote:
I think the confusion is now perfect:
http://www.mikrocontroller.net/topic/207061#2059725
Let Google translate it from german to your language.
Does the difference come from voltage vs. power spectrum?
Yes. When you integrate you get a f^-1 slope in voltage
Dear Bert and all,
maybe I missed it, but how can a linear regulator filter out transients
from a switched PSU? The cited LT1764A has less than 30dB Suppression at
100 kHz getting worse for higher frequencies.Even the famous 7805 had
only 50 dB suppression. For going to a real clean PSU, I
Achim
of course I am using Filters, among others the wide band inductors Radio
Conrad offers. Contact me direct and I will send you sketches of what I do,
including GPSDO with 10811. Where are you located?
Bert
In a message dated 2/13/2011 8:44:56 A.M. Eastern Standard Time,
Hi!
While doing a random google-search for a HP5370B page (I was lazy), I
crashed into a set of pages relating to laser ranging.
I think it could be enlightening as it has a number of time-stamping
equipments we usually do not discuss, but it also provides some comments
on best use and
David,
I I told yesterday it was too late for writing an explanation. Here it is.
I bought one of these units around last June, my intended use was to
distribute the 10 MHz from my Rb oscillator to be used as the reference
for various synthesizers and counters in my home lab. I didn't put
Magnus it indeed does look very good.
I have re-assembled the various boards and the system locked up as normal
after the warm up period. I do indeed have a failure in the lamp control
startup crkt.
So I pulled the fet gate Q2 to ground through a 1 K ohm resistor setting the
lamp to 24 volts.
Dear Paul,
On 13/02/11 18:50, paul swed wrote:
Magnus it indeed does look very good.
I have re-assembled the various boards and the system locked up as normal
after the warm up period. I do indeed have a failure in the lamp control
startup crkt.
My RS does not have a startup circuit, so I
Startup circuit looks like a bad op amp used as a comparator. U1 section a.
This is a LM 158. I have a LM 148 on hand suspect they are different in
temperature quality. So will look it up and see. This is a common op amp so
if the 148 does not work for some reason any numbers of more modern ones
paul swed wrote:
Startup circuit looks like a bad op amp used as a comparator. U1 section a.
This is a LM 158. I have a LM 148 on hand suspect they are different in
temperature quality. So will look it up and see. This is a common op amp so
if the 148 does not work for some reason any numbers of
Willem Programmer PRO GQ-4X
Geraldo,
Just curious which EPROM programmer you purchased?
Joe
--
Geraldo Lino de Campos
gera...@decampos.net
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
Thanks.
Would love to hear how it works.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Geraldo Lino de Campos
Sent: Sunday, February 13, 2011 1:03 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Looking for 5372 boards
Many thanks for the input, Ignacio. I sent an email to Fluke.l (Bob) asking
for more details, but haven't received a response yet. I doubt that he will
reveal much more info about it than what is in the Ebay description. Your
info certainly goes a long way to answer my concerns.
In view of
Who would have thought a seriously leaky cap c7 on the input of U1a pin 3.
Roughly 10K ohm.
System is running at 1.6 x10^11. See if it hangs in there. Lamp is actually
going higher in voltage at 8.2 V. All in all a good experiment.
Regards
Paul.
On Sun, Feb 13, 2011 at 1:46 PM, paul swed
Thanks Bruce turned out to be C7 leaky. I actually used a LM358 dip with
wires kind of a ugly bug. Then realzed that really was not the issue. It was
c7.
I do not have any lm158s can or dip. Pretty sure they would be hard to come
by these days also.
Something to look for at hamfests this year.
I do not have any lm158s can or dip. Pretty sure they would be hard to come
by these days also.
Digikey has stock on everything but the ceramic DIP. They do have it in
TO-99/TO-5.
--
These are my opinions, not necessarily my employer's. I hate spam.
At 17:50 -0500 13-02-2011, paul swed wrote:
I do not have any lm158s can or dip. Pretty sure they would be hard to come
by these days also.
Should you need one, they are in stock @ Digi-Key, Newark/Farnell and
several other distributors.
JDB.
[courtesy of http://findchips.com/ ]
--
If you
Hi,
Since David asked about levels, I connected the unit and got these figures:
Sine output: 2.8 VPP when loaded with 50 Ohm, internal capacitor coupled
Square wave: 0 to +2.5 V loaded with 50 Ohm.
There are other two internal SMA connectors with TTL levels: one is the
inverted comparator
The LM 158 and LM358 are the same part, just different screening levels and
packaging.
For commercial applications at normal temperatures, the LM358 is fine.
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: paul swed paulsw...@gmail.com
Sender:
Group,
Jim Garland on the boatanch...@theporch.com list asked about crystals:
A 22.5MHz crystal (HC-5 case) in my homebrew receiver, built about forty
years ago, no longer oscillates. It seems to be purely an age-related
problem.
It is in a standard solid state circuit which bandswitches six
Two authors come to mind regarding crystal oscillators: Eric Vittoz and
Marvin Ferking. Eric Vittoz is the more modern of the two. His writings
tend towards long term stability of crystal oscillators. Basically, most
designs put too much energy into the crystal, which he claims wears it
out.
On 14/02/11 04:26, Bill Hawkins wrote:
Group,
Jim Garland on the boatanch...@theporch.com list asked about crystals:
A 22.5MHz crystal (HC-5 case) in my homebrew receiver, built about forty
years ago, no longer oscillates. It seems to be purely an age-related
problem.
It is in a standard solid
I have a Power-One switching power supply that puts out +/- 15 Volts in
addition to +5 Volts. I was planning to add a pair of 7812/7912 voltage
regulators to provide the required +/- 12 Volts to the Thunderbolt.
I would welcome any suggestions to improvements in this very basic design,
24 matches
Mail list logo
