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
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Steve - Home
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#150918
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Re: hp8970a recallibration attenuator help
I recall someone telling me that special function will not work with a ~6db ENR source
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Ed Marciniak
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#150917
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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
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Ed Marciniak
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#150916
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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
--
Dave McGuire, AK4HZ
New
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Dave McGuire
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#150915
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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
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Santiago Z
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#150914
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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
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David McQuate
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#150913
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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
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george edmonds
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#150912
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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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Jaap Rusticus
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#150911
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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
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Arie de Muijnck
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#150910
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Re: 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
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Joel Setton
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#150909
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
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,
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Wilko Bulte
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#150908
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Re: HP8510C TRL Calibration
I use used scikit-rf to do a TRL and a SOLT calibration in the PC, both giving very similar results. For the SOLT i substituted the a 'quarter-wave + short', for the 'O', making it a 'S', so it was
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neil
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#150907
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
FWIW, I wear glasses with built in prisms. I take them off when using my microscope. If you can try the Nikon before buying with and without glasses, then that would be nice. Also make sure you have
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Anders
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#150906
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Re: Threads for screws on 8656 Siggen
UNOFFICIAL
I misread the parts list and thought it was 5/32. 3MM is too small , 4mm is too big, 5/32 BSW doesn't screw in
Wayne Eckert BEng
Observing Operations Hub Sydney
M:0409986684
T: 02
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Wayne Eckert
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#150905
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
Good stereo microscopes are like binoculars have one fixed eyepiece and one variable focus one.
close the variable focus eye, focus with the fixed one, reverse, but use the eyepiece alone for
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Harvey White
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#150904
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
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
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Harvey White
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#150903
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Re: Threads for screws on 8656 Siggen
M3.5x.6
Renée
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Renée
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#150902
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
Thank you again all - really thoughtful and comprehensive input.
I may be able to buy a Nikon SMZ645 for $250-300 or so. I wonder what you
all think about that opportunity. This would come with what
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Radu Bogdan Dicher
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#150901
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
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
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Steve Hendrix
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#150900
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Re: Threads for screws on 8656 Siggen
From my long ago youth futzing around in a tool and die shop, I recall, there is also a (rarely found) 5-40 ANSI thread
Sure
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Dale Chayes/KB1ZKD
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#150899
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