PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations Update
Boy that is a nice supply. I see them for $129-160 on ebay.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe
Boy that is a nice supply. I see them for $129-160 on ebay.
On Thu, Mar 18, 2010 at 11:43 PM, J. L. Trantham jlt...@att.net wrote:
Just an update on the status of the 5061A. I started this thread on
January 17.
When first turned on, it pegged the Ion Pump I meter and, at glacial speed,
not 36. 'Pilot error' on my part.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Friday, March 19, 2010 7:15 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply
.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. L. Trantham
Sent: Monday, January 18, 2010 8:41 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
This morning, -0.995 VDC and 2181 VDC. Progress!
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. L
I picked up a very nice 0-4kV 0-200 ma adjustable lab supply on eBay
for $100 (delivered...and it weighs 50 pounds) last month.
It has voltage, current, or (uniquely) power limiting available.
The search term to add is electrophoresis. Apparently the medical
community does some interesting
I think electrophoresis supplies are brute force w/o regulation or current
limiting.
I know they kill careless people. They are used to separate organic
molecules by their drift in a thin layer on a plate with an applied
electric field. The setups are near what you'd see in a Frankenstein
movie!
...@quik.com
Sent: Jan 23, 2010 1:59 PM
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
I think electrophoresis supplies are brute force w/o regulation or current
limiting.
I know they kill careless people
for the output. OSHA must love them.
73, Dick, W1KSZ
-Original Message-
From: J. Forster j...@quik.com
Sent: Jan 23, 2010 1:59 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
I think electrophoresis
: [time-nuts] 4 KV Power Supply Recommendations
Just Google Images to see what they do. Biologists are just nuts, IMO.
-John
The one I saw over on the evil empire (4 KV @ 200 mA) had a
max rating of 200 Watts. Kind of puny for that pair of 3-500's !!
Another one with a 500 VDC
and frequency measurement time-nuts@febo.com
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Just Google Images to see what they do. Biologists are just nuts, IMO.
-John
The one I saw over on the evil empire (4 KV @ 200 mA) had a
max rating of 200 Watts. Kind of puny
A lot of the Tesla coil, etc people insulate their wires with silicone rubber
tubing (available at hobby shops as fuel lines). Make sure it is silicone
rubber and not PVC, etc.
I have seen diode strings built up out of lots of cheap diodes (like 1000V
1N4007s). The diodes are strung
Mark Sims wrote:
A lot of the Tesla coil, etc people insulate their wires with silicone rubber
tubing (available at hobby shops as fuel lines). Make sure it is silicone
rubber and not PVC, etc.
I have seen diode strings built up out of lots of cheap diodes (like 1000V
1N4007s). The diodes
] On
Behalf Of Chuck Harris
Sent: Monday, January 18, 2010 12:21 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Ever see the spectrum of a typical microwave oven that is powered by a
switching power supply? It is so broad and messed
, January 17, 2010 10:58 PM
To: did...@cox.net; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Pictures of my breadboard microwave transformer power supply diode and
resistor strings covered in heat shrink but don't touch
As I understand it, the supplies are 100KHz, and have no significant filtering
at HV. They modulate the magnetron with the 100KHz PWM mess. As long as the
signal doesn't leave the rather wide ISM band, they are under no obligation
to filter anything routers, etc. are squatters on the IMS
-nuts] 4 KV Power Supply Recommendations
This evening, the voltage on pin 4 is -1.039 VDC and the HV is up to 2151
VDC.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
On 1/17/10 10:21 PM, Chuck Harris cfhar...@erols.com wrote:
Ever see the spectrum of a typical microwave oven that is powered by a
switching
power supply? It is so broad and messed up that it will wipe out the wireless
routers that share the same band. At least the old style ovens had a
The frequency of a maggie pulls with applied voltage. An older MO sweeps
through 25 to 50 MHz out of 2450 in sync with the line..
-John
===
On 1/17/10 10:21 PM, Chuck Harris cfhar...@erols.com wrote:
Ever see the spectrum of a typical microwave oven that is powered by a
On 1/18/10 2:15 AM, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
Mark Sims wrote:
A lot of the Tesla coil, etc people insulate their wires with silicone rubber
tubing (available at hobby shops as fuel lines). Make sure it is silicone
rubber and not PVC, etc.
I have seen diode
On 1/18/10 5:44 AM, J. L. Trantham jlt...@worldnet.att.net wrote:
Is that mahogany?
Has anyone ever used 'Starboard', a marine plastic? It looks like it might
be a candidate for HV construction. Also 'Plexiglas'?
Joe
The breadboard material of choice for HV is HDPE- High Density
Why not use diodes from microwave ovens? A very quick check shows ~$5US
each for 12Kv @ 300-500ma. if you buy them new.
Ed
Lux, Jim (337C) wrote:
On 1/18/10 2:15 AM, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
Mark Sims wrote:
A lot of the Tesla coil, etc people insulate
- Original Message
From: J. L. Trantham jlt...@worldnet.att.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Mon, January 18, 2010 7:44:48 AM
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Is that mahogany?
Has anyone ever used
I know this list gets pretty obcessive at times, but 4 KV is really not
that high. It certainly requires care, but you won't really get into real
HV issues at normal atmospheric pressure. It's nothing like 20 KV or 50 KV
or higher. Those are HARD.
Pretty much any careful, decent construction
...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Chuck Harris
Sent: Monday, January 18, 2010 8:28 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
As I understand it, the supplies are 100KHz, and have
Well, they don't have to filter it at all, as long as they stay within
the ISM band they are golden. The 1W peak is concerning, though, for
health reasons. I guess you should keep your head far, far away.
The switching supplies showed up first in the coffee cup sized ovens,
and are now in just
: Re: [time-nuts] 4 KV Power Supply Recommendations
As I understand it, the supplies are 100KHz, and have no
significant filtering at HV. They modulate the magnetron
with the 100KHz PWM mess. As long as the signal doesn't
leave the rather wide ISM band, they are under no obligation
to filter
and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
As I understand it, the supplies are 100KHz, and have no
significant filtering at HV. They modulate the magnetron
with the 100KHz PWM mess. As long as the signal doesn't
leave the rather wide ISM band
On 01/18/2010 11:10 PM, Didier Juges wrote:
I could not resist, so I checked my relatively expensive Sears/Kenmore
microwave oven.
The results are there:
http://www.ko4bb.com/Test_Equipment/Microwave_oven_leakage/
In one word, dismal. Almost 1W peak power leakage at 1 foot, and almost
time and frequency measurement time-nuts@febo.com
Sent: Mon, January 18, 2010 4:10:19 PM
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
I could not resist, so I checked my relatively expensive Sears/Kenmore
microwave oven.
The results are there:
http://www.ko4bb.com/Test_Equipment
[mailto:time-nuts-boun...@febo.com] On Behalf Of Chuck Harris
Sent: Monday, January 18, 2010 8:28 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
As I understand it, the supplies are 100KHz, and have no
significant filtering
Dieder,
That third eyeball growing out of your forehead really is quite becoming...
--
The 1W peak is concerning, though, for health reasons. I guess you should keep
your head far, far away.
KV Power Supply Recommendations
Dieder,
That third eyeball growing out of your forehead really is
quite becoming...
--
The 1W peak is concerning, though, for health reasons. I
guess you should keep your head far, far away
On 1/18/10 2:10 PM, Didier Juges did...@cox.net wrote:
I could not resist, so I checked my relatively expensive Sears/Kenmore
microwave oven.
The results are there:
http://www.ko4bb.com/Test_Equipment/Microwave_oven_leakage/
In one word, dismal. Almost 1W peak power leakage at 1 foot,
Hi
Unless I'm missing something on that display, there are multiple peaks within
10db of the biggest one. That would put a lot of them above 30 mW/cm^2.
If the right angle BNC on the antenna is as bad as some I've seen, they all
could be closer to 40 mW dbm than 30 mW
If by some odd
Darn, another one who can't tell ionizing radiation from electromagnetic
radiation.
Bill Hawkins
-Original Message-
From: Mark Sims
Sent: Monday, January 18, 2010 5:36 PM
That third eyeball growing out of your forehead really is quite becoming...
I'm not really confident about your display, because the source is
sweeping very quickly. It's probably shifting 25 to 50 MHz in 1/240th
second. (The frequency sweep one way and back in 1/120th second).
When I was playing w/ MOs, I used a standard gain horn, cavity wave meter,
crystal detector,
When the green lobby opposed the Pave Paws RADAR on Cape Cod, there was a
lot of concern that the radiation would get into the ocean and
contaminate the fish. For REAL!
-John
Darn, another one who can't tell ionizing radiation from electromagnetic
radiation.
Bill Hawkins
-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims
Sent: Monday, January 18, 2010 5:36 PM
To: time-nuts@febo.com
Subject: [time-nuts] 4 KV Power Supply Recommendations
Dieder,
That third eyeball growing out of your forehead really is
quite becoming
Didier Juges wrote:
I specifically tested for that at the time (even though I did not pull the
spectrum analyzer to verify) and I was able to run the laptop (a Dell D400
running in B/G mode) about 3 feet right in front of the oven without obvious
network access problem.
The router was in the
...@febo.com] On Behalf Of J. L. Trantham
Sent: Saturday, January 16, 2010 9:02 PM
To: time-nuts@febo.com
Subject: [time-nuts] 4 KV Power Supply Recommendations
I have a 5061A That I am trying to bring on line and it pegs
the Ion Pump I meter reading. Measuring the voltage at pin 3
of the +3500V
-boun...@febo.com] On
Behalf Of J. L. Trantham
Sent: Saturday, January 16, 2010 9:32 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Sorry, TIA.
I was monitoring pin 4, not pin 3. Pin 3 is -1.129 VDC which would imply a
current
Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. L. Trantham
Sent: Saturday, January 16, 2010 9:32 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Sorry, TIA.
I
The small modules are nice, but many PMT supplies do not go to 5 mA. 5 mA
@ 4 KV is 20 Watts output, more at the input. That's a lot for a PMT
supply.
Also, remember that some supplies designed for gas lasers have a HV kick
at startup that may go to 20-30 KV.
-John
==
Since it
The best advice. Its making progress.
Give it 2 weeks of steady on time and watch the voltage as you are doing.
I just tried to recover HP 5061A form the US Naval Observatory and though
the tube pumped down fine, unfortunately for me after tons of checking the
tube is bad. Very very low CS
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
The small modules are nice, but many PMT supplies do not go to 5 mA. 5 mA
@ 4 KV is 20 Watts output, more at the input. That's a lot for a PMT
supply.
Also, remember that some supplies designed for gas lasers have a HV kick
at startup
Sent: Sunday, January 17, 2010 8:00 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
The small modules are nice, but many PMT supplies do not go to 5 mA. 5
mA
@ 4 KV is 20 Watts output, more at the input. That's a lot
, 2010 8:00 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
The small modules are nice, but many PMT supplies do not go to 5 mA. 5
mA
@ 4 KV is 20 Watts output, more at the input. That's a lot for a PMT
supply
[mailto:time-nuts-boun...@febo.com]on
Behalf Of J. Forster
Sent: Sunday, January 17, 2010 8:00 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
The small modules are nice, but many PMT supplies do not go to 5 mA.
5
...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of J. Forster
Sent: Sunday, January 17, 2010 2:04 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
I just looked at eBay and most everything suitable is well over $200
January 2010 22:34
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
True, which is unfortunate -- when I was shopping for mine, there were at
least a half-dozen known-good HV modules selling at less than $100, coming
from a couple
- Original Message
From: Chris Stake st...@btinternet.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sun, January 17, 2010 5:05:01 PM
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
What is the operating voltage of the magnetron
:53 PM, Stanley Reynolds wrote:
- Original Message
From: Chris Stake st...@btinternet.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sun, January 17, 2010 5:05:01 PM
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
What
measurementtime-nuts@febo.com
Sent: Sun, January 17, 2010 5:05:01 PM
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
What is the operating voltage of the magnetron in a domestic microwave oven?
Although VERY HAZARDOUS, it might be possible to adapt the PSU from an old
one?
Chris Stake
Yes, if you
: Sun, 17 Jan 2010 20:33:16
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Hi
You also could leave the windings as is and feed the secondary voltage into a
voltage multiplier. Still not very safe to wire up
:05:01 PM
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
What is the operating voltage of the magnetron in a domestic microwave oven?
Although VERY HAZARDOUS, it might be possible to adapt the PSU from an old
one?
Chris Stake
Yes, if you remove the transformer shunts
[mailto:time-nuts-boun...@febo.com]on
Behalf Of john.fo...@gmail.com
Sent: Sunday, January 17, 2010 5:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
The lightbulb wattage can be selected accordingly to limit the
current
2010 18:04:31
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
This is just nuts. A light bulb in the primary side will not render a
microwave oven transformer safe, either to an ion pump or to you. If you're
] On
Behalf Of Chris Stake
Sent: Sunday, January 17, 2010 5:05 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
What is the operating voltage of the magnetron in a domestic microwave oven?
Although VERY HAZARDOUS, it might
: [time-nuts] 4 KV Power Supply Recommendations
Hi
You also could leave the windings as is and feed the secondary voltage into a
voltage multiplier. Still not very safe to wire up.
If you did wire it up, the available current would be pretty massive. I
certainly would not attach it to an ion
-boun...@febo.com] On
Behalf Of Stanley Reynolds
Sent: Sunday, January 17, 2010 8:38 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Yes even with the mods odds are good the secondary is not well isolated from
the frame and even
while I do
other things...
-Original Message-
From: J. L. Trantham jlt...@worldnet.att.net
Date: Sun, 17 Jan 2010 21:13:34
To: 'Discussion of precise time and frequency measurement'time-nuts@febo.com
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
The more I read about
of precise time and frequency measurement'time-nuts@febo.com
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
The more I read about this, the more I think I will just let it 'pump'.
This evening, the voltage on pin 4 is -1.039 VDC and the HV is up to 2151
VDC.
I was wondering how
Bob Camp wrote:
Hi
I agree that Switcher CAD is a great little SPICE program. Well worth every
dime I've paid for it ..
The only issue I see with using it for this kind of thing is not knowing the
details of the transformer. All kinds of fun things can happen if you
accidentally resonate
Danielson mag...@rubidium.dyndns.org
Date: Mon, 18 Jan 2010 04:58:18
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Bob Camp wrote:
Hi
I agree that Switcher CAD is a great little SPICE program. Well worth every
-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Stanley Reynolds
Sent: Sunday, January 17, 2010 8:38 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Yes even with the mods odds are good the secondary
is needed.
www.n4iqt.com/2700V-PS
Stanley
- Original Message
From: Didier Juges did...@cox.net
To: Time-Nuts time-nuts@febo.com
Sent: Sun, January 17, 2010 9:31:13 PM
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
Joe,
Use Linear Technology's SwitcherCAD to simulate
...@febo.com] On
Behalf Of Chris Stake
Sent: Sunday, January 17, 2010 5:05 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 4 KV Power Supply Recommendations
What is the operating voltage of the magnetron in a domestic microwave oven?
Although VERY HAZARDOUS
I have a 5061A That I am trying to bring on line and it pegs the Ion Pump I
meter reading. Measuring the voltage at pin 3 of the +3500V power supply, I
get -0.275 VDC. This is across a 10K resistor and suggests that CS tube
current is 27.5 uA. The voltage from the power supply with the tube
Of J. L. Trantham
Sent: Saturday, January 16, 2010 9:02 PM
To: time-nuts@febo.com
Subject: [time-nuts] 4 KV Power Supply Recommendations
I have a 5061A That I am trying to bring on line and it pegs the Ion Pump I
meter reading. Measuring the voltage at pin 3 of the +3500V power supply, I
get -0.275
Since it appears to be making some progress, I'd be tempted to just
continue. The pump rate of an ion pump varies with the current, so it
seems you are pumping, just somewhat more slowly than w/ the external
supply, as long as you are not overloading the internal supply.
If you don't have a lab
Sent: Saturday, January 16, 2010 9:02 PM
To: time-nuts@febo.com
Subject: [time-nuts] 4 KV Power Supply Recommendations
I have a 5061A That I am trying to bring on line and it pegs the Ion Pump I
meter reading. Measuring the voltage at pin 3 of the +3500V power supply, I
get -0.275 VDC
J. L. Trantham wrote:
Any thoughts on a source for an external HV power supply for this
application?
Cheapest way I know is a 3500 volt, 10 ma neon sign transformer and a
high voltage rectifier diode. The transformer will cost you about $30
new and a replacement diode for a microwave oven
Since it appears to be making some progress, I'd be tempted to just
continue. The pump rate of an ion pump varies with the current, so it
seems you are pumping, just somewhat more slowly than w/ the external
supply, as long as you are not overloading the internal supply.
If you don't have a
74 matches
Mail list logo
