I don't post much because I usually don't have much knowledge that might
add to the discussions. I might ask a question if I thought the group
was the right place, but not much of that recently either.
A couple years back we would have long threads that were about
subtleties of the thing being
On Oct 31, 2010, at 7:21 PM, Bob Camp wrote:
> The gotcha is that the gong can move / twist when hit. The plate buried in
> front of the electronics has to just sit there and take it. More energy
> transfer to the anchored plate.
>
> I'm sure there are alloys that will get you under 1", the i
There are a number of small neons available pretty cheap:
http://www.bulbtown.com/Neon_Glow_Bulbs_s/909.htm
-John
===
> I have had one and a fine case they can make.
> But the place to start looking is at a chopper that they use in it. Its
> made
> of 2 neon bulbs and two photo cel
I did not have any trouble either but I am also win7 and A 9
On Sun, Oct 31, 2010 at 9:53 AM, Ziggy wrote:
> I just re-upped the original 200dpi scans that i did of the manual. Opens
> fine in Adobe Reader 9 on Win7. Also opened with Preview and Adobe on OSX.
> Should be good to go if the trans
I have had one and a fine case they can make.
But the place to start looking is at a chopper that they use in it. Its made
of 2 neon bulbs and two photo cells. With age the neon bulbs die.
What did on a voltmeter that suffered the same issue was use a modern
chopping opamp.
Yup to a bit of doing. O
Hi
The gotcha is that the gong can move / twist when hit. The plate buried in
front of the electronics has to just sit there and take it. More energy
transfer to the anchored plate.
I'm sure there are alloys that will get you under 1", the issue will be making
sure you have the right one...
Try Dave at ArtekMedia.com. He has a huge inventory of scanned HP and Tek
manuals.
Best,
-John
=
> Greetings to the List:
>
> Can anyone point me to a source of service literature (schematic, specs)
> for an hp 7563A logarithmic voltmeter?
>
> My recent purchase will become a c
Greetings to the List:
Can anyone point me to a source of service literature (schematic, specs)
for an hp 7563A logarithmic voltmeter?
My recent purchase will become a cabinet for a different project if it
can't be brought back to life.
Thanks,
Peter
_
On 11/01/2010 01:42 AM, J. Forster wrote:
Pretty much agreed.
There are a few dealers who hold out for near-list prices and can afford
to have stuff not move, because when they do make a sale the profit is
very high. Some, like ElectroCraft, don't make it. Others, like Tucker,
apparently do.
I
Pretty much agreed.
There are a few dealers who hold out for near-list prices and can afford
to have stuff not move, because when they do make a sale the profit is
very high. Some, like ElectroCraft, don't make it. Others, like Tucker,
apparently do.
I frankly doubt that the "gotta have XYZ and o
On Sun, Oct 31, 2010 at 12:25:22PM -0700, J. Forster wrote:
> Two comments:
>
> I have a lot of Tek 7xxx stuff and almost none of it cost anything like
> $0.50 on the dollar. Virtually everything cost well under $0.10 /dollar.
I would agree... I have rarely seen 80s/90s used TE sell for
m
http://www.saelig.com/ has some inexpensive and interesting stuff (I have
not bought
anything from them yet, but the bench scopes start at $287!).
Stan
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of William H. Fite
Sent: Sunday, Octob
Hi Mike:
Are you looking into the Pejsa Ballistics computations?
http://www.prc68.com/I/FNFAL.shtml#Bal
Have Fun,
Brooke Clarke
http://www.PRC68.com
Michael Baker wrote:
Hello, Time-Nutters--
A real-world precision timing need:
As a dedicated long-range rifle shooter and
ball
On Oct 31, 2010, at 8:06 AM, Bob Camp wrote:
> Adequate protection starts at about 1" of steel plate if it's angled to the
> incoming projectiles.
Using hardened armor plate (as used for steel "gong" targets) can get that down
under a half inch, resulting in a lot less mass to drag downrange
It looks like Rigol cloned Tek or Tek cloned Rigol.
-John
===
> Hi Bill:
>
> I really like the Rigol carry case for the scope since it's a way to
> keep all the bits and pieces together. So if you're shopping eBay look
> for the combination package that includes the carry case. De
Hi Bill:
I really like the Rigol carry case for the scope since it's a way to
keep all the bits and pieces together. So if you're shopping eBay look
for the combination package that includes the carry case. Deal Extreme
had the best price last time I looked. Watch the reviews linked on my
And for what it's worth, my digital scope is a TDS-1012 and I've been happy
with it.
John
On Oct 31, 2010, at 12:32 PM, "J. Forster" wrote:
> A couple of months ago, I bought a used Tek TDS 1002 for under $300. I've
> always been very skeptical about DSOs and just love 7xxx series analog
> un
I'm not entirely convinced of this. The main RAM may not be fast enough,
with the demands of the OS, to keep up with real time fast acquisition.
-John
=
> With a modern digital scope, there is no excuse for not having a huge
> buffer.
_
> Anyone have any experience with BitScope or other of the low-end PC scopes?
There are several similar boxes in that area. You might check out the others.
A friend was much happier with a CleverScope. I didn't use it much, but just
watched over his shoulder a bit. The big sharp (PC) screen h
The DSA602 was an impulse purchase that I think I probably could have
lived without. The 1Ghz bandwidth plugins are not easily found, but
the FFT function is very handy. My biggest complaint is that it takes
too long to boot up! Again, an inexpensive option for a scope, good
into the ghz range
Interesting that you should post this, Brooke. The local guy who was going
to sell me the TDS1012 got in touch and asked if I had looked at the Rigol
DS1052E. He's a buddy and was selling me the Tek at his cost so no skin off
his nose if I buy a Rigol--which he does not sell. I've spent the last
Hi Bill:
I too looked at the BitScope but went with the Rigol. It turns out that
Rigol DS1052E makes the low end HP scopes, i.e. they are very high
quality and fantastic value for the money. There's a software hack to
upgrade them from 50 to 100 Mhz. See:
http://www.prc68.com/I/RigolDS1052
Two comments:
I have a lot of Tek 7xxx stuff and almost none of it cost anything like
$0.50 on the dollar. Virtually everything cost well under $0.10 /dollar.
Also, 7xxx and 4xx stuff uses mostly standard components and technology
(no SMTs). This means if it breaks (rarely in my experience) it ca
Like hammers, every tool has it's place and if you only have one
hammer, everything looks like a 10penny nail.
As a guy with an unfortunate affliction to test equipment, (as do many
of you, I'm sure) I've got a 7000 series analog scope which I love, a
tek 2236 portable, a DS602 digital, and a para
I think you can use the 7854 to digitize the output of the sampling PIs.
The place to ask is Tekscopes2. You might need to do a small mod to the
7T11A for proper triggering. I vaguely remember seeing it in a manual
(7854 or 7T11A ??) somewhere.
As I remember the 7854 A/Ds don't work with the SA PI
Hi Alan,
My $200 Tek 7854 mainframe with the 7S11/7T11 combo take my old scope up
high enough to look at 13-14GHz repetitive signals. I don't think it can
take a screen shot or do much if any analysis with these plugins though but
they're still handy for a lot of things. I love the digital stora
Well, we all get those really nice deals now and again. I got a NIB (by
which I mean box never even opened) Spectracom 8164 for a hundred bucks...
On Sun, Oct 31, 2010 at 1:52 PM, J. Forster wrote:
> I got my TDS 1002 along w/ 4 NOS probes for $280. I got mine at a flea,
> but you might want
Sampling scopes will display repetative signals above the sampling frequency
if the repetition rate of the signals and sampling rate are not
relatedthere were GHz bandwidth scopes in the 60s using this method. Not
a lot of good on single shot though. PC scopes are quite good for repetative
slow
I got my TDS 1002 along w/ 4 NOS probes for $280. I got mine at a flea,
but you might want to post a WTB on Tekscopes2 or TestEquipTrader on
YahooGroups.
Also, you can likely get a Tek 465B or 2xxx analog scope for <$200.
Also, try calling a few leasing companies or dealers to see if they have
an
I can get a new TDS1002 for ~$700 or a TDS 1012 for a bit over $1K. Given
that the typical eBilge price for a 1002 runs $600 or so, new seems to make
sense.
On Sun, Oct 31, 2010 at 12:32 PM, J. Forster wrote:
> A couple of months ago, I bought a used Tek TDS 1002 for under $300. I've
> always
Robert said;
Bitscope headlines "100MHz analog bandwidth" but you have to big a bit
deeper to find "up to 40Ms/s". Seems like they are wasting most of the
bandwidth if the have an anti-alising filter. This is really only usable to
20MHz single shot.
Yes, I noticed that, too. Almost sounds like de
A couple of months ago, I bought a used Tek TDS 1002 for under $300. I've
always been very skeptical about DSOs and just love 7xxx series analog
units, but I needed something for occasional portable use.
I was pleasantly surprised. IMO, it's not an analog scope, but it does
have nice features, inc
Hi Bill,
It depends what you need/want. There are issues with the PC based 'scopes. Most
obvious to the user is response time. It can be fustrating to have the screen
change a second after the event happened! Other issues are sample rate and
input voltage range. The Bitscope headlines "100MHz an
Bob said:
...for home use, previously owned is the only way to go.
I agree (he said, looking around at the chipped and dinged stuff nearby).
That being said, both are new, the Tek because there is not a lot of saving
to be achieved from buying a used one, especially when it means giving up
the lif
Hi
Buying brand new or previously owned?
There's a *big* difference there and for home use, previously owned is the only
way to go.
A "real" scope is easier to float from ground, and the controls make more
sense. The knobs and switches really do help you make quick and accurate
measurements.
Stan said:
Spectrum Lab, Spectran, etc. are also free and on a windows PC will show the
frequency spectrum to the frequency limits of the soundcard.
Yes, I use Spectrum Lab already but trying to make a bench scope out of it
is more trouble than it is worth.
Magnus said:
Can you lock up a compute
Hi
Been down this road before.
The issue turns out to be the optics in the sky screens. You can only get "just
so good" without fancy optics. The normal photo detector behind a slit with the
sky as the light source is far from optimum. If you are going to put money into
the system, the optics
XBEE PRO XSC + PIC can do datalink this for about 75$ / observation point,
if you don't require high throughput
Xtof.
Finding a suitable data-link is much more an issue than the time-scale
and time-stamping issues, which could be done with sufficient
precision for not too much money and eff
On 10/31/2010 02:35 PM, William H. Fite wrote:
'morning, folks,
I was just on a verge of purchasing a Tek TDS1012 scope when a friend
suggested that I could save a chunk of change by buying a BitScope. Although
I've been aware of PC scopes, I never really looked into them. The specs
look pretty
Hello Bill,
If you already have a PC with a motherboard soundcard or a accessory
soundcard (PCI), then
with appropriate software you can look at signals in the time or
frequency domains.
a google search on scope software may find some shareware.
Spectrum Lab, Spectran, etc. are also free and
On 10/31/2010 01:56 PM, Michael Baker wrote:
Hello, Time-Nutters--
A real-world precision timing need:
As a dedicated long-range rifle shooter and
ballistics enthusiast, I am in the early stages
of a project I am getting started on...
The object is to measure the velocity
I'd think you don't even need the pn code. Check out any of the wireless
modules for sending analog video on 2.4ghz.. Cobble together an antenna with
gain.
Calibrate the delay throughout the hardware at 50 yd or so using hardline
compare, and extrapolate to longer ranges.
On Oct 31, 2010,
I just re-upped the original 200dpi scans that i did of the manual.
Opens fine in Adobe Reader 9 on Win7. Also opened with Preview and
Adobe on OSX. Should be good to go if the transfer isn't corrupted.
Paul - K9MR
On 10/31/2010 6:49 AM, shali...@gmail.com wrote:
I cannot open the manual wit
While in the shower:
You have the advantage that most of the
equipment will be more or less in line,
and you will have line of sight.
What if, at each station, you let your
microcontroller generate a 10kHz carrier
modulated by a 5kHz PN code, through an IR
led, and through a plastic lens (children
'morning, folks,
I was just on a verge of purchasing a Tek TDS1012 scope when a friend
suggested that I could save a chunk of change by buying a BitScope. Although
I've been aware of PC scopes, I never really looked into them. The specs
look pretty good (the fact that I was looking at an entry-le
Hello,
Long ago I was involved in a project that has something to do with test
cannons. They used a doppler radar (a commercially available equipment,
but I don't remember the manufacturer) for measuring the speed of the
bullet (a rather big one... if I was right, it was a 155mm caliper :) )
Hello, Time-Nutters--
A real-world precision timing need:
As a dedicated long-range rifle shooter and
ballistics enthusiast, I am in the early stages
of a project I am getting started on...
The object is to measure the velocity of a
rifle bullet both at the muzzle and downrange
I cannot open the manual with either Adobe Acrobat or Foxit. You may want to
resend it with a different name.
The file header looks good, but I have found that the pdf viewers are finicky
if even a small part of the file is missing or messed up.
Didier KO4BB
Sent from my Verizon Wireless Blac
Neat!
Rob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Jason Rabel
Sent: 31 October 2010 12:09 AM
To: time-nuts@febo.com
Subject: [time-nuts] My latest Net4501 NTP Server
Just thought I would share a quick pic of my latest home buil
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