Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
I wrote a C++ program that disassembles the .brd file for a project.? It creates an OpenSCAD document that places models of the parts onto the board, giving you a board visualization.? It can handle internal and external fillets on the board edges. Depending on which parts you use, you may or may not need to model some specific parts (in OpenSCAD) to build up your own library.
As part of the process, the program has to read and calculate the part placement? from the .brd file.? I know it does EAGLE 7.7, not sure about what else.
It was originally based on NopHead's libraries, but I got errors I couldn't track down (not documented), and just bagged it and wrote my own.
How are you with C++ (Embarcadero C++ community version)?
Harvey
ps: I can attach a picture.
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On 3/17/2025 11:29 PM, David McQuate via groups.io wrote:
I’d like to know more about the program that allows you to model the PC board in SCAD, and find the XY of any part.
Thanks!
David
On 2025-03-17 20:01, Harvey White wrote:
I use an American Optical (because it was cheap) and found a nice heavy stand to hold it up.? I have a fiber optic ring light on the microscope.
I?find?that?an?auxiliary?light?can?help?to?illuminate?from?the?side?as?well.
I would build a board holder that allows you to position any part of a board under the microscope without moving the microscope. How complicated you make that little board holder is up to you. Maybe move manually and lock into place.
if you were building boards by hand, and using EAGLE, then I can show you a program that models the PC board in OpenSCAD. That same parsing routine can find the XY of any part.
that?might?help?a?bit.
Ideally, you want to move the board in X and Y, then rotate for the best soldering angle.
Harvey
On?3/17/2025?2:59?PM,?Radu?Bogdan?Dicher?via?groups.io?wrote:
Thank?you?all,?great?input.
From these choices, it sounds like a stereo microscope on a boom would be ideal. I do tend to work on all sorts of positions and oftentimes spill outside of the desk/bench. Also, some of the boards I need to examine are too large to fit under a microscope with a stand.? I'm not sure exactly how well this relative freedom to move the microscope around works. But the idea to have that available is very exciting - I'm really tired of using my multiple hand magnifiers with their own lights and often another flashlight on the other hand. My eyes get terribly strained with that setup.
Probably a stupid question, but I know nothing on the "stereo microscope" topic - are these working well for people wearing glasses?
Thank?you.
Radu.
On Mon, Mar 17, 2025, 10:29 AM John Griessen via groups.io <> <john@...> wrote:
????On?3/17/25?07:59,?Dave?McGuire?via?groups.io?<>?wrote:
????>?On?3/17/25?00:02,?Radu?Bogdan?Dicher?via?groups.io
????<>?wrote:
????>>?Having?done?enough?(red)?eye?cracking?smd?soldering?jobs?or
????inspections?in?case?of?suspected?failure?(cold?joints,?etc.),?I've
????>>?decided?to?invest?a?bit?on?a?better?optical?setup.
????>>?There's?plenty?of?cameras?on?the?marketplaces?and?retailers?out
????there,?but?what?are?some?better?choices??Good?experiences?with
????>>?some?specific?models?
????>>?Also,?what?to?watch?for??Specs,?minimal?magnification?that
????crosses?over?a?good?threshold?
????>>?I?have?a?couple?of?large?screens?at?my?bench?-?I'm?thinking
????this?will?be?best?done?by?shooting?this?over?to?one?of?those.?USB,
????>>?HDMI?...
????>>?Lighting/LEDs?making?a?significant?difference?
????>>?Thank?you?for?your?input.
????>
????>????The?Mantis?by?Vision?Engineering.
????>
????>????On?the?prototyping?bench?I?moved?from?a?Nikon?SMZ-1?with?an
????after-market?LED?ring?light?to?a?1st-generation?Mantis?about?ten
????>?years?ago,?and?upgraded?to?a?Mantis?Elite?last?year.
????>
????>????The?Nikon?is?a?binocular?inspection?microscope?with?great
????optics?(typical?of?Nikon)?and?excellent?overall?performance.??I?had
????>?an?opportunity?to?try?out?a?Mantis?when?visiting?a?customer's
????lab.??I?was?astonished?by?its?capabilities?and?purchased?one
????>?immediately.
????>
????>????My?upgrade?to?the?Mantis?Elite?last?year?was?a?similarly
????impressive?thing.
????>
????>????Two?important?considerations?are?binocular?optical?paths?and
????lighting.
????>
????>????Binocular?optics?are,?IMO,?absolutely?required?for?SMT?work.
????>
????>????Lighting?is?next.??People?often?skimp?on?this?and?use?a
????random?desk?lamp?or?whatever?happens?to?be?lying?around,?but?a?proper
????>?lighting?system?makes?all?the?difference.??There?are?cheap
????aftermarket?LED?right?lights?that?are?surprisingly?effective;?this
????>?suggests?that?the?lighting?really?isn't?that?difficult?a?problem
????to?solve.??The?key?is?360-degree,?oblique,?even?lighting?to
????>?eliminate?shadows.??(lighting?is?built-in?on?the?Mantis?microscopes)
????>
????>???????????????-Dave
????Hi?Radu,
????I've?got?Greenough?scopes?(binocular)?by?Olympus?and?Vision
????Engineering?(precursor?to?Mantis),?and?fiber?light?rings?and?sources
????to?sell.
????The?Vision?Engineering?ones?are?kind?of?large,?but?trying?an
????Olympus??Greenough?would?be?painless?--?you?could?return?it?if?not
????liking?it.
????When?I?assemble?SMT?boards?I?use?a?Greenough?on?a?boom?that?lets
????me?move?with?fine?dials?in?X?and?Y?(and?of?course?Z?for?focus).
????I've?also?tried?the?Vision?Engineering?and?it?would?probably?be?a
????speedup?tool,?but?Ive?not?afforded?enough?bench?top?space?to?use
????one?effectively?yet.
????Also?have?Nikon?SMZ-7?and?a??Vision?Engineering?Greenough?for?sale.
????Booms?to?hold?them?are?super?heavy,?so?looking?locally?makes?the
????most?sense.
????I?agree?with?Dave,?that?if?you?want?to?do?prototypes?your?speed
????and?quality?will
????improve?drastically?with?stereo?vision?--?it?puts?your?"there"?in
????the?micro?world...??Also?you?will?notice?more?since?flat?view
????onscreen?doesn't?translate?to?3D?in?your?mind?well.
????The?large?screens?might?be?OK?for?some?things,?but?not?for?active
????seeing?when?looking?for?tiny?cracks,?missing?solder,?adequate
????solder?paste,?etc.
????Now?to?get?busy?cleaning?and?photographing?the?ones?I?mentioned...
????-- ????John Griessen
????Albuquerque?NM
|
Re: Threads for screws on 8656 Siggen
On Mon, Mar 17, 2025 at 09:59 PM, 搁别苍é别 wrote:
A #6 screw is almost exactly 3.5 mm diameter.
?
0.6 pitch comes out to just over 42 per inch.
?
0.7 pitch comes out to just over 36 per inch, but M3.5 x 0.7 does not appear to be a real option.
--
Jim Adney
Madison, WI USA
|
Re: Threads for screws on 8656 Siggen
I just noticed that gauge I linked to is 60 degree metric, and 55 degree imperial (whitworth), so that's not a good "covers both common systems" thread gauge - that said, I did run into stupid Whitworth threads on some hydraulic fittings in the last few months, so it's ideal to have all 3 gauges on hand - 60 degree metric, 60 degree imperial, and 55 degree whitworth - you never know what crazy thread you might run into randomly.
I have the screw from an HP8664A, which I assume will be similar. Pan head, torx drive.
I checked it with various thread gauges, and if you're not looking closely (i.e. under a magnifier or microscope) you'd be inclined to say it's 42TPI, but under the microscope I can see 42TPI isn't correct - the screw gets every so slightly out of sync with the thread gauge over the length of the screw.
Checking the metric gauges, it meshes exactly with 0.6mm, so 搁别苍é别 is correct - it must be 3.5mm 0.6mm/thread
You should get yourself a set of thread gauges - they come in handy for all sorts of stuff, and they're not that expensive. $10 gets you one with both metric and imperial. They tend to have them in the hardware store if you want to go to a local brick and mortar store to get them, but they can be hard to find - usually tucked away in a dusty corner of the hand tool section somewhere.
Link here as an example, not an endorsement of this particular gauge (though the ones I have are very similar, but came with a tap and die set, and I got another set when I bought 'fishtail' gauges for threading on the lathe with a single point threading tool):
here is a thread
comparison and pitch charts for future info
搁别苍é别
On 3/18/25 9:21 AM, Cubdriver via
wrote:
For what it's
worth, here in the U.S. McMaster-Carr has M3.5 x 0.6 pitch
screws?
?
-Pat
?
> ------ Original Message ------
> From: setton@...
> To: HP-Agilent-Keysight-equipment@groups.io
> Sent: Tuesday, March 18th 2025, 06:07 AM
> Subject: Re: [HP-Agilent-Keysight-equipment] Threads for
screws on 8656 Siggen
?
If it's indeed M3.5 x 0.6, it's the same size as the
hardware used on the recent HP-IB connectors, the ones with
black screws (early HP-IB connectors used uncolored stainless
steel 6-32 American hardware). You can check for compatibility
with the screws on an HP-IB connector.
?
This is indeed a metric size, but a very unusual one which
is not easily found, even here in Europe. Very few hardware
vendors have them, one of them is here :
(no affiliation with them).
I hope this helps !
Joel Setton
|
Re: Threads for screws on 8656 Siggen
I have the screw from an HP8664A, which I assume will be similar. Pan head, torx drive.
I checked it with various thread gauges, and if you're not looking closely (i.e. under a magnifier or microscope) you'd be inclined to say it's 42TPI, but under the microscope I can see 42TPI isn't correct - the screw gets every so slightly out of sync with the thread gauge over the length of the screw.
Checking the metric gauges, it meshes exactly with 0.6mm, so 搁别苍é别 is correct - it must be 3.5mm 0.6mm/thread
You should get yourself a set of thread gauges - they come in handy for all sorts of stuff, and they're not that expensive. $10 gets you one with both metric and imperial. They tend to have them in the hardware store if you want to go to a local brick and mortar store to get them, but they can be hard to find - usually tucked away in a dusty corner of the hand tool section somewhere.
Link here as an example, not an endorsement of this particular gauge (though the ones I have are very similar, but came with a tap and die set, and I got another set when I bought 'fishtail' gauges for threading on the lathe with a single point threading tool):
here is a thread
comparison and pitch charts for future info
搁别苍é别
On 3/18/25 9:21 AM, Cubdriver via
wrote:
For what it's
worth, here in the U.S. McMaster-Carr has M3.5 x 0.6 pitch
screws?
?
-Pat
?
> ------ Original Message ------
> From: setton@...
> To: HP-Agilent-Keysight-equipment@groups.io
> Sent: Tuesday, March 18th 2025, 06:07 AM
> Subject: Re: [HP-Agilent-Keysight-equipment] Threads for
screws on 8656 Siggen
?
If it's indeed M3.5 x 0.6, it's the same size as the
hardware used on the recent HP-IB connectors, the ones with
black screws (early HP-IB connectors used uncolored stainless
steel 6-32 American hardware). You can check for compatibility
with the screws on an HP-IB connector.
?
This is indeed a metric size, but a very unusual one which
is not easily found, even here in Europe. Very few hardware
vendors have them, one of them is here :
(no affiliation with them).
I hope this helps !
Joel Setton
|
Re: hp8970a recallibration attenuator help
Hello Steve yes and an alternative solution here too says so
https://www.simonsdialogs.com/2015/05/hp-agilent-keysight-8970a-noise-figure-meter-getting-started-error-e26/
--
Roberto
|
Re: hp8970a recallibration attenuator help
Thanks for the help but do I also have to enter the data from the ENR noise table? The only thing I had to do was the table of the various points of the graph printed on the case then I have another table provided to me but I don't know which of the two is more coherent
table the table I got by looking at the graph
sheet 2 calibration sheet that you provided me
suggestions accepted
--
Roberto
|
Re: Threads for screws on 8656 Siggen
here is a thread
comparison and pitch charts for future info
搁别苍é别
On 3/18/25 9:21 AM, Cubdriver via
groups.io wrote:
toggle quoted message
Show quoted text
For what it's
worth, here in the U.S. McMaster-Carr has M3.5 x 0.6 pitch
screws?
?
-Pat
?
> ------ Original Message ------
> From: setton@...
> To: HP-Agilent-Keysight-equipment@groups.io
> Sent: Tuesday, March 18th 2025, 06:07 AM
> Subject: Re: [HP-Agilent-Keysight-equipment] Threads for
screws on 8656 Siggen
?
If it's indeed M3.5 x 0.6, it's the same size as the
hardware used on the recent HP-IB connectors, the ones with
black screws (early HP-IB connectors used uncolored stainless
steel 6-32 American hardware). You can check for compatibility
with the screws on an HP-IB connector.
?
This is indeed a metric size, but a very unusual one which
is not easily found, even here in Europe. Very few hardware
vendors have them, one of them is here :
(no affiliation with them).
I hope this helps !
Joel Setton
|
Re: Threads for screws on 8656 Siggen
Apparently the first tilde split the link (at least as it came to me in the message) - copy and paste the entire line to get directly to the M3.5 x 0.6 screws. -Pat
?
> ------ Original Message ------
> From: pbmanning@...
> To: HP-Agilent-Keysight-equipment@groups.io
> Sent: Tuesday, March 18th 2025, 12:21 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] Threads for screws on 8656 Siggen
? For what it's worth, here in the U.S. McMaster-Carr has M3.5 x 0.6 pitch screws?
?
-Pat
? > ------ Original Message ------
> From: setton@...
> To: HP-Agilent-Keysight-equipment@groups.io
> Sent: Tuesday, March 18th 2025, 06:07 AM
> Subject: Re: [HP-Agilent-Keysight-equipment] Threads for screws on 8656 Siggen
? If it's indeed M3.5 x 0.6, it's the same size as the hardware used on the recent HP-IB connectors, the ones with black screws (early HP-IB connectors used uncolored stainless steel 6-32 American hardware). You can check for compatibility with the screws on an HP-IB connector.
? This is indeed a metric size, but a very unusual one which is not easily found, even here in Europe. Very few hardware vendors have them, one of them is here : (no affiliation with them). I hope this helps ! Joel Setton
|
Re: Threads for screws on 8656 Siggen
For what it's worth, here in the U.S. McMaster-Carr has M3.5 x 0.6 pitch screws?
?
-Pat
?
> ------ Original Message ------
> From: setton@...
> To: HP-Agilent-Keysight-equipment@groups.io
> Sent: Tuesday, March 18th 2025, 06:07 AM
> Subject: Re: [HP-Agilent-Keysight-equipment] Threads for screws on 8656 Siggen
? If it's indeed M3.5 x 0.6, it's the same size as the hardware used on the recent HP-IB connectors, the ones with black screws (early HP-IB connectors used uncolored stainless steel 6-32 American hardware). You can check for compatibility with the screws on an HP-IB connector.
? This is indeed a metric size, but a very unusual one which is not easily found, even here in Europe. Very few hardware vendors have them, one of them is here : (no affiliation with them). I hope this helps ! Joel Setton
|
Re: Agilent/Keysigh ESG series CLIP
I'd be interested in (paying for) any CLIP files for the E4433B and also the E4438C especially if the E4438C CLIP includes the options for low phase noise and high output power.
?
I don't know how much these CLIP files cost though. If the price is good I've also got an old ESGD4000A sig gen (E4433A?) if there is a CLIP for this.
?
?
|
Re: Agilent/Keysigh ESG series CLIP
Interesting topic!
I already answered here before, and got my version of the CLIP, but I just realizing that there is multiple CLIP version If I understand correctly.
Would be amazing to have better version of this to be honest.
?
Also, I realized that Agilent had schematics also for the "C" revision of the instruments (PN E4438C-0BV according to this: )
Also, according to this: ?PN: E8251-90032 is the CLIP package for early PSG generator? (They use similar hardware than ESG in part)
?
Would be amazing to finally found and make "public" or sell this manual, as they would be usefully as I begin to see this high end ESG and PSG units on ebay recently.
Alberto
?
|
Re: hp8970a recallibration attenuator help
That is correct. You need either ~15dB ENR or an amplifier with at least 10dB gain between the 6 dB ENR noise source and the 8970 input. I use an 8447D when I don’t have a 15 dB ENR noise source handy.
toggle quoted message
Show quoted text
On Mar 18, 2025, at 8:38?AM, Ed Marciniak via groups.io <ed@...> wrote:
?
I recall someone telling me that special function will not work with a ~6db ENR source
|
Re: hp8970a recallibration attenuator help
I recall someone telling me that special function will not work with a ~6db ENR source
|
Re: Threads for screws on 8656 Siggen
Amazon lists a significant number of different M3.5-0.6 screws. Some are cheap at 9-13 cents each, some are expensive tamper resistant heads closer to a dollar each than pennies, and some have carton quantities of multiple thousands of pieces.
?
But there are some where a package is under 10 USD.
Mouser even has a few.
|
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
Another +1 for Metcal. I use an SP200 for hand assembly; these are fantastic.
Interestingly, the designer of the SP200 is on this mailing list.
-Dave
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On 3/18/25 04:42, Wilko Bulte via groups.io wrote: Let me do a +1 for the Metcal soldering station suggestion. I have 2 older MX500 stations, those are the 13.5MHz version. Two-handed soldering can be quite useful and works fine using my full optical, prisma equipped stereo microscope (no LCD, no electronics, just glassware ;-)
Do note that the cartridges/tips used determine the tip temperature (essentially the Curie temperature of the tip), no adjustment necessary or possible. They are relatively costly, especially for specialised tips. I was very lucky to find a large stash of tips advertised in Germany, which I bought a substantial part of for real good prices. In retrospect, I have bough the whole lot..
Wilko
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: Agilent/Keysigh ESG series CLIP
Hello Xu
I have an E4422B with an issue on the A9 output board.
I’m interested in the CLIP document you mentioned. Please let me know the price, I’d appreciate it.
I tried contacting Milan, but I didn’t get a response.
Thanks
Santiago
|
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
I’d like to know more about the program that allows you to model the PC board in SCAD, and find the XY of any part.
Thanks!
David
toggle quoted message
Show quoted text
On 2025-03-17 20:01, Harvey White wrote:
I use an American Optical (because it was cheap) and found a nice heavy stand to hold it up.? I have a fiber optic ring light on the microscope. I?find?that?an?auxiliary?light?can?help?to?illuminate?from?the?side?as?well. I would build a board holder that allows you to position any part of a board under the microscope without moving the microscope. How complicated you make that little board holder is up to you. Maybe move manually and lock into place. if you were building boards by hand, and using EAGLE, then I can show you a program that models the PC board in OpenSCAD.? That same parsing routine can find the XY of any part. that?might?help?a?bit. Ideally, you want to move the board in X and Y, then rotate for the best soldering angle. Harvey On?3/17/2025?2:59?PM,?Radu?Bogdan?Dicher?via?groups.io?wrote:
Thank?you?all,?great?input.
From these choices, it sounds like a stereo microscope on a boom would be ideal. I do tend to work on all sorts of positions and oftentimes spill outside of the desk/bench. Also, some of the boards I need to examine are too large to fit under a microscope with a stand.? I'm not sure exactly how well this relative freedom to move the microscope around works. But the idea to have that available is very exciting - I'm really tired of using my multiple hand magnifiers with their own lights and often another flashlight on the other hand. My eyes get terribly strained with that setup.
Probably a stupid question, but I know nothing on the "stereo microscope" topic - are these working well for people wearing glasses?
Thank?you.
Radu.
On Mon, Mar 17, 2025, 10:29 AM John Griessen via groups.io <> <john@...> wrote:
????On?3/17/25?07:59,?Dave?McGuire?via?groups.io?<>?wrote:
????>?On?3/17/25?00:02,?Radu?Bogdan?Dicher?via?groups.io
????<>?wrote:
????>>?Having?done?enough?(red)?eye?cracking?smd?soldering?jobs?or
????inspections?in?case?of?suspected?failure?(cold?joints,?etc.),?I've
????>>?decided?to?invest?a?bit?on?a?better?optical?setup.
????>>?There's?plenty?of?cameras?on?the?marketplaces?and?retailers?out
????there,?but?what?are?some?better?choices??Good?experiences?with
????>>?some?specific?models?
????>>?Also,?what?to?watch?for??Specs,?minimal?magnification?that
????crosses?over?a?good?threshold?
????>>?I?have?a?couple?of?large?screens?at?my?bench?-?I'm?thinking
????this?will?be?best?done?by?shooting?this?over?to?one?of?those.?USB,
????>>?HDMI?...
????>>?Lighting/LEDs?making?a?significant?difference?
????>>?Thank?you?for?your?input.
????>
????>????The?Mantis?by?Vision?Engineering.
????>
????>????On?the?prototyping?bench?I?moved?from?a?Nikon?SMZ-1?with?an
????after-market?LED?ring?light?to?a?1st-generation?Mantis?about?ten
????>?years?ago,?and?upgraded?to?a?Mantis?Elite?last?year.
????>
????>????The?Nikon?is?a?binocular?inspection?microscope?with?great
????optics?(typical?of?Nikon)?and?excellent?overall?performance.??I?had
????>?an?opportunity?to?try?out?a?Mantis?when?visiting?a?customer's
????lab.??I?was?astonished?by?its?capabilities?and?purchased?one
????>?immediately.
????>
????>????My?upgrade?to?the?Mantis?Elite?last?year?was?a?similarly
????impressive?thing.
????>
????>????Two?important?considerations?are?binocular?optical?paths?and
????lighting.
????>
????>????Binocular?optics?are,?IMO,?absolutely?required?for?SMT?work.
????>
????>????Lighting?is?next.??People?often?skimp?on?this?and?use?a
????random?desk?lamp?or?whatever?happens?to?be?lying?around,?but?a?proper
????>?lighting?system?makes?all?the?difference.??There?are?cheap
????aftermarket?LED?right?lights?that?are?surprisingly?effective;?this
????>?suggests?that?the?lighting?really?isn't?that?difficult?a?problem
????to?solve.??The?key?is?360-degree,?oblique,?even?lighting?to
????>?eliminate?shadows.??(lighting?is?built-in?on?the?Mantis?microscopes)
????>
????>???????????????-Dave
????Hi?Radu,
????I've?got?Greenough?scopes?(binocular)?by?Olympus?and?Vision
????Engineering?(precursor?to?Mantis),?and?fiber?light?rings?and?sources
????to?sell.
????The?Vision?Engineering?ones?are?kind?of?large,?but?trying?an
????Olympus??Greenough?would?be?painless?--?you?could?return?it?if?not
????liking?it.
????When?I?assemble?SMT?boards?I?use?a?Greenough?on?a?boom?that?lets
????me?move?with?fine?dials?in?X?and?Y?(and?of?course?Z?for?focus).
????I've?also?tried?the?Vision?Engineering?and?it?would?probably?be?a
????speedup?tool,?but?Ive?not?afforded?enough?bench?top?space?to?use
????one?effectively?yet.
????Also?have?Nikon?SMZ-7?and?a??Vision?Engineering?Greenough?for?sale.
????Booms?to?hold?them?are?super?heavy,?so?looking?locally?makes?the
????most?sense.
????I?agree?with?Dave,?that?if?you?want?to?do?prototypes?your?speed
????and?quality?will
????improve?drastically?with?stereo?vision?--?it?puts?your?"there"?in
????the?micro?world...??Also?you?will?notice?more?since?flat?view
????onscreen?doesn't?translate?to?3D?in?your?mind?well.
????The?large?screens?might?be?OK?for?some?things,?but?not?for?active
????seeing?when?looking?for?tiny?cracks,?missing?solder,?adequate
????solder?paste,?etc.
????Now?to?get?busy?cleaning?and?photographing?the?ones?I?mentioned...
????-- ????John Griessen
????Albuquerque?NM
|
Re: Threads for screws on 8656 Siggen
Hi all
The threads you are looking for are M3.5, this is a little used thread except in the UK where it is used by electricians to hold switch face plates in place, it is actually very close to 4BA which were the original screws used..
HP used this thread in place of 6-32 when NATO and the US military required all threads to be ISO Metric. The tapping hole diameter is almost the same for 6-32 and M3.5, it is predominately used in case work only, particularly castings.
Hope this helps
G Edmonds
On Tuesday 18 March 2025 at 10:07:20 GMT, Joel Setton via groups.io <setton@...> wrote:
If it's indeed M3.5 x 0.6, it's the same size as the hardware used on the recent HP-IB connectors, the ones with black screws (early HP-IB connectors used uncolored stainless steel 6-32 American hardware). You can check for compatibility with the screws on an HP-IB connector.
This is indeed a metric size, but a very unusual one which is not easily found, even here in Europe. Very few hardware vendors have them, one of them is here : (no affiliation with them). I hope this helps ! Joel Setton
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Re: hp8970a recallibration attenuator help
Hello Roberto,
Special Function 33 is for calibrating the IF attenuators. Just connect a 15 dB ENR noise source and execute SF 33. Temperature entering not necessary.
Greetings, Jaap PA0JRK
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
On 2025-03-18 02:27, Steve Hendrix wrote:
On
2025-03-17 2:59 PM, Radu Bogdan Dicher via groups.io wrote:
Probably a stupid question, but I know
nothing on the "stereo microscope" topic - are these working
well for people wearing glasses?
I personally wear bifocals. I take them off when using the
microscope, to allow my eyes to get close enough to see the full
field of view. It just shift the optimum focus for me, from what's
optimum for my tech. Not a big issue.
That approach does not, of course compensate for astigmatism, so
if you have significant astigmatism you might do better with
glasses on.
Steve Hendrix
I always had +2d astigmatism in both eyes. A nice gift from my
father (instrument maker), 50 years ago, was an astigmatic
correction lens for my camera's ocular so I could take pictures
without glasses but still with sharp and full field vision. It was
made to screw in the eye-shield thread on top of the ocular.
A set of lenses in that shape and size should fit on a microscope
ocular. But where to obtain them, given an eye correction recipe?
Arie
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Roberto
Cubdriver
Dave McGuire
Santiago Z
Arie de Muijnck