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Re: Threads for screws on 8656 Siggen
Maybe I have the same problem as the 8656: the cover screws for the 8643 is NOT 6-32 (USA, national coarse), nor is it 6-40 (USA, national fine). The diameter is very close to USA #6, a finer thread
By Bill Carver · #150892 ·
Re: Threads for screws on 8656 Siggen
Asian mystery screws that are almost imperial measurements... Jim ________________________________ Sent: Monday, March 17, 2025 1:50 PM To: [email protected]
By Jim n8qoh · #150891 ·
Re: Threads for screws on 8656 Siggen
I went to a hardware specialty store with one of the Torx screws from the 8643. They said it was not a metric diameter. Nor was it 32 threads per inch, a US "coarse" thread. They said it look like it
By Bill Carver · #150890 ·
Re: E5052A Power On Test (3.3V Bus Supply)
Thanks. I had some free time today and experimented with a discretely designed gain block in place of the MMIC. I think I'm hitting the limits of the E5052A now but I managed -170dBc/Hz at 10kHz
By jmr · #150889 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
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
By John Griessen · #150888 ·
Re: 3" disks for 8566A/B, 8568A/B on HP 9000 Series 200 Computers - Any interest in images?
Hello Ulf, The HP "ASCII" files can be converted to a Windows txt form with HPDIR. I wrote some time ago a small Windows utility that is doing this, also in batch mode (multiple files at once). I
By George/Gyorgy Albert · #150886 ·
Re: 8643A failure
This is a common failure point on these.? Simply removing and reinstalling the connector to the backplane board on mine returned it to specified voltage.? I then cleaned it with denatured alcohol
By Matt Harris · #150885 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
If you do consider getting a stereo microscope then I'd recommend something with prism lenses as this allows a more natural viewing angle. This does come at some expense of optical quality compared to
By jmr · #150884 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
In the case of the Mantis, I would recommend to 'try before you buy' as the Mantis doesn't suit everyone. At work opinions are divided, some people avoid using the Mantis as they get distorted vision
By jmr · #150883 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
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
By Dave McGuire · #150882 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
If you have an opportunity, check out a Mantis. Sometimes you can find good deals on used ones. They are absolutely amazing - a binocular scope without eyepieces. There's been a lot of writeup on
By Paul Amaranth · #150881 ·
Re: 3" disks for 8566A/B, 8568A/B on HP 9000 Series 200 Computers - Any interest in images?
I used an old 9122 Disk drive. Was able to read the disks and uploaded the zipped contents a few moments ago into the group files area: HP-200 Computer files used by 8566 and 8568 Spectrum analyzers
By Ulf Kylenfall · #150880 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
Agreed wholeheartedly. I bought a second-hand Leitz stereo microscope many years ago and have used it for all my SMD soldering. About a year ago I bought a LED ring light and that really made a
By Anders · #150879 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
I agree with Steve Hendrix, stereo or binocular zoom microscopes are key to good eye hand coordination which requires depth perception lacking on 2D displays used with digital microscopes. Joe
By Joe · #150878 ·
Re: Threads for screws on 8656 Siggen
p. 6-36. 4 * MP101, 6-32. G?ran
By G?ran Krusell · #150877 ·
Re: 8643A failure
Dear Bill, Many thanks for the update. My 8643A has displayed this fault code from time to time. I will check the connectors carefully when I take it out of the rack for oven power supply
By alwyn.seeds1 · #150876 ·
hp8970a recallibration attenuator help
hello all I have a hp8970A meter that has been turned off for a long time. I turned it back on and I know that the internal attenuator needs to be recalibrated with the special command function SP
By Roberto · #150875 ·
Re: Threads for screws on 8656 Siggen
There's also a 3.5mm standard thread, used on IEEE-488 connectors, that might be a possibility. Steve Hendrix
By Steve Hendrix · #150874 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
I have used a stereo zoom microscope from Titan Tools for several decades, for soldering mostly down to 0603, sometimes 0402, and occasionally 0201. Stereo, because you really need the depth
By Steve Hendrix · #150873 ·
Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
Radu, I picked up a Tomlov brand digital microscope that is handy for soldering and board inspections. There are several styles available on Amazon for prices as cheap as $70. The advantage to it
By Greg Muir · #150872 ·