| Author |
Message |
Peter K.
Guest
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 Posted:
Sun Dec 18, 2005 7:44 am Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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Jerry Avins <jya@ieee.org> writes:
| Quote: | A long piece of spaghetti stock artfully arranged with one end under
the chassis and the other where it can be blown into allows for more
precise timing.
|
Aha! So you're the culprit! :-)
Ciao,
Peter K. |
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Joerg
Guest
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| Posted:
Mon Dec 19, 2005 1:15 am Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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Hello Peter,
| Quote: | Yes, I heard a similar story... but it involved someone putting one
end of a vaccuum cleaner hose under a piece of equipment, standing
behind a partition and blowing smoke from their cigarette into the
other end of the hose (so that it looked like smoke was coming from
the piece of equipment).
|
I guess the screw cap method gave it more authenticity. The plastic in
there caused a smell that resembled frying cables.
Regards, Joerg
http://www.analogconsultants.com |
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Al Clark
Guest
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| Posted:
Mon Dec 19, 2005 9:15 am Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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Joerg <notthisjoergsch@removethispacbell.net> wrote in news:Cb0pf.33828
$7h7.26198@newssvr21.news.prodigy.com:
| Quote: | Hello Al,
Microscope with Boom & Light: $500-$1000
How 'bout #3 magnifier glasses (a buck at the Dollar Store) and a loupe
on the swivel arm of a discarded drafting table lamp (pretty much free)?
Regards, Joerg
http://www.analogconsultants.com
|
I solder using a microscope at about 7x. With practice, you know exactly
where your hands are (and the soldering tip). I don't think I've tried
soldering my fingers for several years.
I inspect at higher magnification.
A good light ring on the microscope really helps as well.
I have never tried 3x reading glasses. Maybe I will get a pair.
--
Al Clark
Danville Signal Processing, Inc.
--------------------------------------------------------------------
Purveyors of Fine DSP Hardware and other Cool Stuff
Available at http://www.danvillesignal.com |
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Joerg
Guest
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| Posted:
Mon Dec 19, 2005 3:25 pm Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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Hello Al,
| Quote: | I solder using a microscope at about 7x. With practice, you know exactly
where your hands are (and the soldering tip). I don't think I've tried
soldering my fingers for several years.
|
I used to solder under a video microscope where you have to look up at
the monitor. It's just a matter of practice but the microscopes get in
the way with larger circuit boards.
| Quote: | I inspect at higher magnification.
|
I do as well. What I want to try out some day is to hook up a Nikon
Coolpix camera. It seems that those digital cameras have a downside in
that they can output NTSC while running but not digital data. So I
either have to get a video card for the lab computer or schlepp the
video monitor onto the top shelf.
| Quote: | A good light ring on the microscope really helps as well.
|
I often use a bright halogen lamp that can be swiveled around to give
the best illumination. It can be very handy to find hair cracks and stuff.
| Quote: |
I have never tried 3x reading glasses. Maybe I will get a pair.
|
They are cool. But try to get some that are narrow enough so that you
can peek over the top. It prevents from bumping into stuff or knocking
things over (my keyboard could tell as story about that).
Regards, Joerg
http://www.analogconsultants.com |
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Jerry Avins
Guest
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| Posted:
Mon Dec 19, 2005 5:15 pm Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
|
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Al Clark wrote:
...
| Quote: | I have a small halogen lamp on the bench as well. The main catch is that
it gets warm. The fiberoptic light ring is much better.
I have never tried 3x reading glasses. Maybe I will get a pair.
They are cool. But try to get some that are narrow enough so that you
can peek over the top. It prevents from bumping into stuff or knocking
things over (my keyboard could tell as story about that).
Thanks for the comments and ley us know if the camera idea works.
|
A perf-board ring holding white LEDs makes a good cheap cool light ring.
They're relatively easy to make; if they aren't already articles of
commerce, they soon will be.
If anyone's interested, I'll post a picture of the 3X telescopic
magnifiers. You've probably seen your dentist use one. I can see around
them. My first wife said they made me look like a bug-eyed monster.
Jerry
--
Engineering is the art of making what you want from things you can get.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ |
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Al Clark
Guest
|
| Posted:
Mon Dec 19, 2005 5:15 pm Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
|
|
Joerg <notthisjoergsch@removethispacbell.net> wrote in
news:v0vpf.34703$dO2.10072@newssvr29.news.prodigy.net:
| Quote: | Hello Al,
I solder using a microscope at about 7x. With practice, you know
exactly where your hands are (and the soldering tip). I don't think
I've tried soldering my fingers for several years.
I used to solder under a video microscope where you have to look up at
the monitor. It's just a matter of practice but the microscopes get in
the way with larger circuit boards.
I inspect at higher magnification.
I do as well. What I want to try out some day is to hook up a Nikon
Coolpix camera. It seems that those digital cameras have a downside in
that they can output NTSC while running but not digital data. So I
either have to get a video card for the lab computer or schlepp the
video monitor onto the top shelf.
|
With the advancement and falling prices of digital cameras, this is a
very interesting idea.
| Quote: |
A good light ring on the microscope really helps as well.
I often use a bright halogen lamp that can be swiveled around to give
the best illumination. It can be very handy to find hair cracks and
stuff.
|
I have a small halogen lamp on the bench as well. The main catch is that
it gets warm. The fiberoptic light ring is much better.
| Quote: |
I have never tried 3x reading glasses. Maybe I will get a pair.
They are cool. But try to get some that are narrow enough so that you
can peek over the top. It prevents from bumping into stuff or knocking
things over (my keyboard could tell as story about that).
|
Thanks for the comments and ley us know if the camera idea works.
Al
--
Al Clark
Danville Signal Processing, Inc.
--------------------------------------------------------------------
Purveyors of Fine DSP Hardware and other Cool Stuff
Available at http://www.danvillesignal.com |
|
| Back to top |
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Al Clark
Guest
|
| Posted:
Mon Dec 19, 2005 5:16 pm Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
|
|
Jerry Avins <jya@ieee.org> wrote in
news:w9ydnVLiS_pJVzvenZ2dnUVZ_sqdnZ2d@rcn.net:
| Quote: | Al Clark wrote:
...
I have a small halogen lamp on the bench as well. The main catch is
that it gets warm. The fiberoptic light ring is much better.
I have never tried 3x reading glasses. Maybe I will get a pair.
They are cool. But try to get some that are narrow enough so that you
can peek over the top. It prevents from bumping into stuff or
knocking things over (my keyboard could tell as story about that).
Thanks for the comments and ley us know if the camera idea works.
A perf-board ring holding white LEDs makes a good cheap cool light
ring. They're relatively easy to make; if they aren't already articles
of commerce, they soon will be.
|
There you go, You can start your own ebay business. This is a very good
idea. Light rings (even used) are expensive.
| Quote: |
If anyone's interested, I'll post a picture of the 3X telescopic
magnifiers. You've probably seen your dentist use one. I can see
around them. My first wife said they made me look like a bug-eyed
monster.
Jerry
|
--
Al Clark
Danville Signal Processing, Inc.
--------------------------------------------------------------------
Purveyors of Fine DSP Hardware and other Cool Stuff
Available at http://www.danvillesignal.com |
|
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Jerry Avins
Guest
|
| Posted:
Mon Dec 19, 2005 5:16 pm Post subject:
Confessions of an optics junky. |
|
|
Joerg wrote:
| Quote: | Hello Al,
I solder using a microscope at about 7x. With practice, you know
exactly where your hands are (and the soldering tip). I don't think
I've tried soldering my fingers for several years.
I used to solder under a video microscope where you have to look up at
the monitor. It's just a matter of practice but the microscopes get in
the way with larger circuit boards.
I inspect at higher magnification.
I do as well. What I want to try out some day is to hook up a Nikon
Coolpix camera. It seems that those digital cameras have a downside in
that they can output NTSC while running but not digital data. So I
either have to get a video card for the lab computer or schlepp the
video monitor onto the top shelf.
A good light ring on the microscope really helps as well.
I often use a bright halogen lamp that can be swiveled around to give
the best illumination. It can be very handy to find hair cracks and stuff.
I have never tried 3x reading glasses. Maybe I will get a pair.
They are cool. But try to get some that are narrow enough so that you
can peek over the top. It prevents from bumping into stuff or knocking
things over (my keyboard could tell as story about that).
|
I bought a no-name stereo microscope body for less than $50 and
refurbished it. Then I made a mount for it in part from an old telescope
focuser, and equipped it with eyepieces from my collection. (I bought a
new pair eventually.) The magnification is about 8 and 15. Nowadays, I
use it mostly for removing splinters in my hand because it supports
itself. I use 7X, 10X, and 15X Hastings triplet magnifiers; the 10X is
on my key ring. For soldering jewelry, I sometimes use a pair of 3X
Galilean telescopes. The long working distance -- about a foot -- means
I don't need a heat-shield mask.
I built a vertical illuminator into an old medical microscope, using a
discarded light source from a metallurgical microscope. An eyepiece tube
that accommodates 1-1/4 telescope eyepieces together with a 4X objective
gives me a decently wide monocular field at 32X, and of course, I can go
much higher. Working with inverted images takes getting used to, though.
I made an adapter that lets me use a C-mount camera instead of an
eyepiece. The sensor array is much smaller than a microscope's field, so
one sees the central part only at higher-than-wanted magnification.
Eventually, I added a positive lens to the adapter that reduces the
image size on the array, giving a broader field. I call it a wrolab lens
-- Barlow, backwards. (There's one in my C-5 telescope to reduce the
f-number from 10 to 6.3.) Putting the image up on a TV monitor takes a
lot of eyestrain out of repeated inspections. Besides, it's fun to show
grandchildren the activity in a drop of puddle water.
Jerry
--
Engineering is the art of making what you want from things you can get.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ |
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Guest
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| Posted:
Mon Dec 19, 2005 5:16 pm Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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|
Jerry Avins wrote:
....
| Quote: | If anyone's interested, I'll post a picture of the 3X telescopic
magnifiers. You've probably seen your dentist use one. I can see around
them. My first wife said they made me look like a bug-eyed monster.
|
Can't you post a picture with you as bug-eyed monster :-) ? |
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Peter K.
Guest
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| Posted:
Mon Dec 19, 2005 5:16 pm Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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abariska@student.ethz.ch writes:
| Quote: | Jerry Avins wrote:
...
If anyone's interested, I'll post a picture of the 3X telescopic
magnifiers. You've probably seen your dentist use one. I can see around
them. My first wife said they made me look like a bug-eyed monster.
Can't you post a picture with you as bug-eyed monster :-) ?
|
A must! :-)
Ciao,
Peter K. |
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Jerry Avins
Guest
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| Posted:
Mon Dec 19, 2005 11:29 pm Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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abariska@student.ethz.ch wrote:
| Quote: | Jerry Avins wrote:
...
If anyone's interested, I'll post a picture of the 3X telescopic
magnifiers. You've probably seen your dentist use one. I can see around
them. My first wife said they made me look like a bug-eyed monster.
Can't you post a picture with you as bug-eyed monster :-) ?
|
OK: http://users.rcn.com/jyavins/BEM.jpg
I'm looking with 3 power at the statue of Lincoln seated inside the
Lincoln Memorial on the back of a penny. That's a good distance, but the
field is small; about 2" as they're mounted. 2.5" if moved closer to the
eyes.
Jerry
--
Engineering is the art of making what you want from things you can get.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ |
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Guest
|
| Posted:
Tue Dec 20, 2005 1:16 am Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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Jerry Avins wrote:
| Quote: | abariska@student.ethz.ch wrote:
Jerry Avins wrote:
...
If anyone's interested, I'll post a picture of the 3X telescopic
magnifiers. You've probably seen your dentist use one. I can see around
them. My first wife said they made me look like a bug-eyed monster.
Can't you post a picture with you as bug-eyed monster :-) ?
OK: http://users.rcn.com/jyavins/BEM.jpg
|
Neat! But do you have one from upfront? A _really_ scary one? |
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Guest
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| Posted:
Tue Dec 20, 2005 9:16 am Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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Jerry Avins wrote:
| Quote: | abariska@student.ethz.ch wrote:
Jerry Avins wrote:
abariska@student.ethz.ch wrote:
Jerry Avins wrote:
...
If anyone's interested, I'll post a picture of the 3X telescopic
magnifiers. You've probably seen your dentist use one. I can see around
them. My first wife said they made me look like a bug-eyed monster.
Can't you post a picture with you as bug-eyed monster :-) ?
OK: http://users.rcn.com/jyavins/BEM.jpg
Neat! But do you have one from upfront? A _really_ scary one?
Your wish is my command. http://users.rcn.com/jyavins/BEM.htm
|
Hahaha! That third one is just like I imagined! When she is a bit
older, I'll show this photo to Viviana when she was naughty :-).
Regards,
Andor |
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Jerry Avins
Guest
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| Posted:
Tue Dec 20, 2005 9:16 am Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
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abariska@student.ethz.ch wrote:
| Quote: | Jerry Avins wrote:
abariska@student.ethz.ch wrote:
Jerry Avins wrote:
...
If anyone's interested, I'll post a picture of the 3X telescopic
magnifiers. You've probably seen your dentist use one. I can see around
them. My first wife said they made me look like a bug-eyed monster.
Can't you post a picture with you as bug-eyed monster :-) ?
OK: http://users.rcn.com/jyavins/BEM.jpg
Neat! But do you have one from upfront? A _really_ scary one?
|
Your wish is my command. http://users.rcn.com/jyavins/BEM.htm
Jerry
--
Engineering is the art of making what you want from things you can get.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ |
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Jerry Avins
Guest
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| Posted:
Tue Dec 20, 2005 5:16 pm Post subject:
Re: I'm confused ;) was[Re: ADC limitations for bandpass/IF |
|
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Peter K. wrote:
| Quote: | abariska@student.ethz.ch writes:
Hahaha! That third one is just like I imagined! When she is a bit
older, I'll show this photo to Viviana when she was naughty :-).
Andor, thanks for suggesting the photos of Jerry. :-)
|
I made them a little easier to look at.
Jerry
--
Engineering is the art of making what you want from things you can get.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ |
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