Mosquito Sound

mowhoong wrote:
I brought a TENMA brand Dig.Multimeter model 72-2050 which was on
promotion from Farnell.I did not notice until when i need to test
continnity, the beeper was very soft, it sound like " Mosquito" , it
disappoint me. I suspect this belong to a mfe. design
problem.Unfortunately i can't exchange or refund from Farnell because
warrenty period is over. At another time i visit Farnell trade counter
and found they have a display set which was the same model, when i
tried it the effect was the same. So i don't ever belive any item that
is "special price".
Click to expand...
There are a few other handhelds that are as wimpy on the sound; not
much one can do about it.
 
On Sat, 19 Jun 2004 17:06:39 -0700, John Miles wrote
(in article <MPG.1b3e74e82f248a829896c8@news-central.giganews.com>):

In article <51ca721c.0406191506.5c7d313b@posting.google.com>,
acannell@wwc.com says...

The wavetek meterman 37xr (www.metermantesttools.com) meets all of the
criteria except it doesnt measure temperature. But I WANT temperature
(why dont they just throw it in?). It seems that there are many meters
that almost meet the criteria, except they dont measure inductance.

Does anyone know of a meter that has everything?

Nope, including that one. Its capacitance- and inductance-measuring
precision are both literally 1,000 times worse than an inexpensive
dedicated LC meter (http://www.aade.com) can offer, and 40 nF/4 mH
minimum ranges aren't useful for anyone except maybe an HVAC repairman.

This is just an example of a product that does a great many things
badly.

For temperature measurement, you can buy a thermocouple adapter (e.g.,
http://bkprecision.com/www/np_searchmodel7.asp?
lf=DMM+Temperature+Adapter) that will work with any DMM.

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------
Click to expand...
I have a Protek 506 that comes pretty close to the specs you describe. I
still you a separate cap meter though.

-- remove the transistor from my name to respond


==============================================================
Posted with Hogwasher. Mac first, Mac only:
http://www.asar.com/cgi-bin/product.pl?58/hogwasher.html
==============================================================
 
dont know (mojo@nospam_netscape.com) said those last words:


I remember it was not the normal DOS format. Our cmptr expert at that
time did make a backup. how I don't know.
Click to expand...
You can copy any floppy disk using WinImage.

[]s
--
Š Chaos Master. | "I've tried so hard to tell
My Evanescence HP is at: | myself that you're gone
http://marreka.no-ip.com | And thought you were still
(most often offline... ) | with me..."
------------------------- -- Evanescence, "My Immortal"
 
Hi!

Most - not all. It won't do a Sega System 24 disk for one.

Yours, Mark.

Chaos Master wrote:

dont know (mojo@nospam_netscape.com) said those last words:



I remember it was not the normal DOS format. Our cmptr expert at that
time did make a backup. how I don't know.


You can copy any floppy disk using WinImage.

[]s
Click to expand...
 
Focused Halogen Lamp ! with appropriate masks to protect non-soldered
portions ! try about 50-100 Watts

Yukio YANO


"Jeff S" <jeffs429@hotmail.com> wrote in message
news:d41e013a.0406161356.5f0c8041@posting.google.com...
Hi All,

I'm working with some silicon chips and I'm looking for a type of oven
that can heat up the solder finish rather quickly (in seconds would be
great) but not so much for the body of the chips.

I was thinking that an IR furnace will probably do it but someone said
it could do just the opposite.

Can someone here answer this question for me?

Thanks!
Click to expand...
 
In article <cbhjn7$1b4$1@titan.btinternet.com>,
Mark (UK) <jumbos.bazzar@btopenworld.com> wrote:
Chaos Master wrote:
dont know (mojo@nospam_netscape.com) said those last words:

I remember it was not the normal DOS format. Our cmptr expert at that
time did make a backup. how I don't know.

You can copy any floppy disk using WinImage.
Most - not all. It won't do a Sega System 24 disk for one.
Click to expand...
There's an old (a dozen years ago) DOS program called Anadisk that will
analyze and copy just about anything. I used it to read Kaypro 4 CPM
disks on a PC. The current web site says you have to be a police
official or investigator, but it was in the Simtel archive, so it's
bound to be out there somewhere.

Mark Zenier mzenier@eskimo.com Washington State resident
 
Hi!

Tried Anadisk....

:-(

There are several programs that can read the disk okay, including
Anadosk and the Acorn Archimedes!! Unfortunately, none of them can write
out a copy that works on the original Sega setup.

Yours, Mark.

Mark Zenier wrote:
In article <cbhjn7$1b4$1@titan.btinternet.com>,
Mark (UK) <jumbos.bazzar@btopenworld.com> wrote:

Chaos Master wrote:

dont know (mojo@nospam_netscape.com) said those last words:


I remember it was not the normal DOS format. Our cmptr expert at that
time did make a backup. how I don't know.

You can copy any floppy disk using WinImage.

Most - not all. It won't do a Sega System 24 disk for one.


There's an old (a dozen years ago) DOS program called Anadisk that will
analyze and copy just about anything. I used it to read Kaypro 4 CPM
disks on a PC. The current web site says you have to be a police
official or investigator, but it was in the Simtel archive, so it's
bound to be out there somewhere.

Mark Zenier mzenier@eskimo.com Washington State resident
Click to expand...
 
Polyonomous wrote:
On Mon, 21 Jun 2004 22:39:42 GMT, Polyonomous <ham@luncheonmeat.spam> wrote:


On Sun, 20 Jun 2004 01:35:28 GMT, "Colin B." <cbigam@somewhereelse.nucleus.com
wrote:


In sci.electronics.equipment Polyonomous <ham@luncheonmeat.spam> wrote:


Get an aerosol can of deodorants, preferably 'Right Guard' and hold a match in
front of the nozzle. Rent Goldfinger (James Bond flick) for a demonstration.

Or The Blues Brothers, equally classic.

And in the movie Paycheck (2003), Ben Affleck uses an aerosol can of womens
perfume to escape from the bad guys.


After reviewing the DVD I see that was womens hair spray not perfume he used.

A fun one is using "Binaca" breath-freshening spray. You get hundreds of
Click to expand...
1-second fireballs.
 
On 24 Jun 2004 08:02:45 -0700, Thomas wrote:

Hi all,

As one of our products seems to be disturbt by a local non permanent
EMC problem
we need to analyse what is happening on site.
We are looking for a solution to make long time ( say 4 weeks) data
logging of a spectrum.

Following specs are required:

Frequency span: 1KHz and 1 MHz (min 10KHz to 500 KHz)
Bandwidth: <= 10KHz
Dynamic range: > 25 dB

I was thinking abt a PC interface with "logging on trigger"
We need abt 5 "spectrum logger" so it is getting a bit price
sensitive...
Has anybody experiance with this cheap PC interfaces using FFT?

Any comment or proposal is highly welcome

Best Regards


Thomas
Click to expand...

I don't know specifically what you will require for this job.

Places you might check are as follows:

http://www.agilent.com
http://www.ni.com
http://www.gage-applied.com

I don't know if any of the above can solve your problem. However, they
may give you an idea of what is possible. They may also be able to
advice you on whether a PC interface or standalone test equipment is
best.

I don't know if you can do FFT from 1 KHz to 1 MHz. A big frequency
span like that takes a lot of computing power. Most FFT spectrum analyzers
are from DC to something like 100 KHz.

You may want to also look into getting some kind of power line monitoring.
How do you know your problem is EMC?

You will also need to define a trigger condition. If something happens,
then
you record what is happening for 5 minutes for later analysis.

Aidan Grey
 
Hi Thomas,

Why not just using a low-cost 12-bit / 2Msps A/D board in a vanilla PC, then
write a small software repetitively getting a buffer of say 2000 samples at
2Msps, then calculating the FFT, then the log spectrum power of the FFT ?
You will get a 1KHz resolution from 1Khz up to 1MHz, with around 30dB of
dynamic range... Then you will have to define your trigger settings and to
log the FFT when the trigger is exceeded. Labview will seems natural choice
to develop such algorithms quite quickly.

Let me know if I can help you more...

Yours,

--
Robert Lacoste
ALCIOM - The mixed signal experts
www.alciom.com


"Thomas" <babelfish2001@web.de> a écrit dans le message de
news:280f917a.0406240702.4a376682@posting.google.com...
Hi all,

As one of our products seems to be disturbt by a local non permanent
EMC problem
we need to analyse what is happening on site.
We are looking for a solution to make long time ( say 4 weeks) data
logging of a spectrum.

Following specs are required:

Frequency span: 1KHz and 1 MHz (min 10KHz to 500 KHz)
Bandwidth: <= 10KHz
Dynamic range: > 25 dB

I was thinking abt a PC interface with "logging on trigger"
We need abt 5 "spectrum logger" so it is getting a bit price
sensitive...
Has anybody experiance with this cheap PC interfaces using FFT?

Any comment or proposal is highly welcome

Best Regards


Thomas
Click to expand...
 
Thomas wrote:
Hi all,

As one of our products seems to be disturbt by a local non permanent
EMC problem
we need to analyse what is happening on site.
We are looking for a solution to make long time ( say 4 weeks) data
logging of a spectrum.

Following specs are required:

Frequency span: 1KHz and 1 MHz (min 10KHz to 500 KHz)
Bandwidth: <= 10KHz
Dynamic range: > 25 dB

I was thinking abt a PC interface with "logging on trigger"
We need abt 5 "spectrum logger" so it is getting a bit price
sensitive...
Has anybody experiance with this cheap PC interfaces using FFT?

Any comment or proposal is highly welcome

Best Regards


Thomas
Click to expand...
I have a friend who claims to be able to stuff an antenna into his VCR
video input. He can then go back and listen to the radio by listening
to the video out with a receiver. There are obvious problems
with the sync interval, but if you can manage to change tapes every six
hours, you might be able to get some useful information from it.
Might get you thinking about alternative approaches.
Depending on the circumstances, some of the FCC (or equivalent in your
country) field guys can be VERY helpful.
mike

--
Return address is VALID.
Bunch of stuff For Sale and Wanted at the link below.
Toshiba & Compaq LiIon Batteries, Test Equipment
Yaesu FTV901R Transverter, 30pS pulser
Tektronix Concept Books, spot welding head...
http://www.geocities.com/SiliconValley/Monitor/4710/
 
On Sun, 27 Jun 2004 19:17:16 +0000, Mark (UK) wrote:

Thanks, I'll try those programs...

Anyone have a manual? Ive figured out most of the menus, but there is
always something you miss... :}

All this about coping disks reminds me about the Copy II PC option board I
used to have, it would copy just about any floppy... Except the ones with
a 'defect' put in. Trouble is it was an ISA board and I dont have any ISA
computers anymore!

Thanks again, Joe



Hi!

Tried Anadisk....

:-(

There are several programs that can read the disk okay, including
Anadosk and the Acorn Archimedes!! Unfortunately, none of them can write
out a copy that works on the original Sega setup.

Yours, Mark.

Mark Zenier wrote:
In article <cbhjn7$1b4$1@titan.btinternet.com>,
Mark (UK) <jumbos.bazzar@btopenworld.com> wrote:

Chaos Master wrote:

dont know (mojo@nospam_netscape.com) said those last words:


I remember it was not the normal DOS format. Our cmptr expert at that
time did make a backup. how I don't know.

You can copy any floppy disk using WinImage.

Most - not all. It won't do a Sega System 24 disk for one.


There's an old (a dozen years ago) DOS program called Anadisk that will
analyze and copy just about anything. I used it to read Kaypro 4 CPM
disks on a PC. The current web site says you have to be a police
official or investigator, but it was in the Simtel archive, so it's
bound to be out there somewhere.

Mark Zenier mzenier@eskimo.com Washington State resident
Click to expand...
 
I am working on a GPIB interface for TSK prober also. Have you been able
to make progress so far.
 
koen verstappen <koenv1@xs4all.nl> wrote in
news:40E5BFE9.6060400@xs4all.nl:

I have an TEK 620 and I am looking for circuit diagrams (but I don't
think Tek released them).
- Has anyone some spare parts or or an a machine for canibalism in the
TDS500/600/700 series, modules ( floppy disk, FFT, rsr232 etc) please
contact me.
- Also interested in the lates firm ware of these type op DSO scopes.

greetings
koen verstappen
Click to expand...
There's a -possiblilty- that TEK supplied schematics to the US Military for
TDS models that the military bought under contract.I don't know what models
would have Tech Order(T.O.) manuals,or where to get them from.

--
Jim Yanik
jyanik-at-kua.net
 
"koen verstappen" <koenv1@xs4all.nl> wrote in message
news:40E5BFE9.6060400@xs4all.nl...
I have an TEK 620 and I am looking for circuit diagrams (but I don't
think Tek released them).
- Has anyone some spare parts or or an a machine for canibalism in the
TDS500/600/700 series, modules ( floppy disk, FFT, rsr232 etc) please
contact me.
- Also interested in the lates firm ware of these type op DSO scopes.

greetings
koen verstappen
Click to expand...
Tek has a Service Manual for the 620 & 640 series scopes available on their
website; look for document 070-8718-04. It's about 5 MB, but it only
supports self repair to the module level. There is no detail of the modules
themselves. They also have User's & Programmer's Manuals.

Ed
 
Thank you but I have these manuals and indeed they are only at module level

koen verstappen

Ed Price wrote:
"koen verstappen" <koenv1@xs4all.nl> wrote in message
news:40E5BFE9.6060400@xs4all.nl...

I have an TEK 620 and I am looking for circuit diagrams (but I don't
think Tek released them).
- Has anyone some spare parts or or an a machine for canibalism in the
TDS500/600/700 series, modules ( floppy disk, FFT, rsr232 etc) please
contact me.
- Also interested in the lates firm ware of these type op DSO scopes.

greetings
koen verstappen



Tek has a Service Manual for the 620 & 640 series scopes available on their
website; look for document 070-8718-04. It's about 5 MB, but it only
supports self repair to the module level. There is no detail of the modules
themselves. They also have User's & Programmer's Manuals.

Ed
Click to expand...
 
No idea, that's why I posted them :) Just parts to me but someone may want
them.

"Mark (UK)" <jumbos.bazzar@btopenworld.com> wrote in message
news:cceqp4$bph$1@titan.btinternet.com...
Hi!

Is the first one the PSU from a midway cocktail SI? I'm by no means a
Midway expert, but I recall seeing something like that when I pciked up
some SI boards to repair.
Click to expand...
 
Hi Heinz, I have a spectrum analyzer hp8568B and all documentation. I will
send you HV power supply schematic in PDF format. If you have any question
or need another schematic pages, just to send me an email, I will return you
all information that you need. Good luck.


"Heinz Lenk" <heinzf_lenk@web.de> a écrit dans le message de
news:b28db2b4.0407040939.4cc1f9e7@posting.google.com...
Please is someone out there who could provide me with a softcopy of
just the schematic part of the Hewlett Packard HP8568
Spectrumanalyser's
High Voltage power supply?

When IBM closed its German STD facility, which was no part of the
Hitachi deal, the emploies, scheduled to be fired, could buy some of
the mostly defect measurement equipments.
So I got 40kg of a blind HP8568 but without any documentation.
Even it works with an external Tektronix XYZ-monitor, I would like to
repair the
faulty High Voltage power supply.

Thanks in advance
Heinz Lenk
Click to expand...
 
Andrew wrote:
I've just bought a HP8560A spectrum analyser (sorry for UK spelling).
The front panel tells me it is a 8560A. When it first turns on it
writes 8560E to the screen, also in CONFIG / DATECODE & OPTIONS it
lists 8560E and 002 (002 is the tracking generator).

It seems to have the features of the 8560E, 1Hz RBW and fancy power
measurement options.

I've searched the web but cannot find out the scope of this upgrade.
Can anyone please enlighten me more? Has the spec of a 8560E or is it
some in-between animal.

Andrew
When I win $1million dollars in a lottery, I sure won't be looking a
Click to expand...
gift horse in the mouth!

Andrew
 
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