¿ªÔÆÌåÓý

Date
Re: HP 4192A GPIB measurements
Hi Peter. I'd recommend not using Word to edit such files, that has a tendency to alter things, should you want to use the data in something else.? Use Notepad, or other similar tool, that won't make
By Dave_G0WBX · #94197 ·
HP 3476A hybrid 1813-0091
Hello folks, I have two HP 3476A DMMs whose hybrid chips 1813-0091 have failed. I know they've failed because when I replace with one from a working 3476, everything works. I'ld be most grateful for
By Brian · #94196 ·
Re: HP parts story
Thanks CHeF, and also via the same link the huge work done by Marc Mislange F5MM/ et aussi via le m¨ºme lien l'¨¦norme travail r¨¦alis¨¦ par Marc Mislange F5MM : http://hparchive.com/marc_mislanghe
By Sylvain Klingebiel · #94195 ·
Re: HP 4192A GPIB measurements
On Thu, 07 Feb 2019 11:41:44 -0800, you wrote: >Having gone to some effort to remove annunciations from the data collected using Prologix and EZGPIB I find it is not such a good idea. >Some of those
By Harvey White · #94194 ·
HP parts story
De : F1CHF Date : 08/02/2019 00:31:05 could be nice to know this link ... Bonsoir le CHF une fourch¨¦e pour le grenier si pas d¨¦j¨¤ vu.Hewlett-Packard Service Parts - The Hewlett Packard Archive
By F1CHF · #94193 ·
Re: HP34702A Ohms converter issues
I was checking component values and noticed that R64 is a 10K pot instead of the marked 1K on the schematic.? Also, R69 is totally missing.? Apparently this unit is really early (s/n 00134 of the
By gregdunn@... · #94192 ·
Re: N 75/50 ohm pads
Hi Paul, I have a pair for the price of postage. There should be a photo in a recent post within last few days. Steve does not need them. Contact me off line with your shipping address and I will get
By peter bunge · #94191 ·
Re: HP8714ET Impedance
An easy way to tell N male 75 ohm and N male 50 ohm. The center pins on 75 ohm N connectors draw blood, the 50 ohm ones do not! -- Sam Reaves ARS W3OHM Owner and Moderator of: LeCroy Owners Group on
By Sam Reaves · #94190 ·
Re: Help to fix power supply (A80) of an old HP 3586A
Yes they are off the board. So by adding external pass transistors to the board you can easily troubleshoot what ever happens. Your not passing any real current so anything will do. Believe me you
By paulswed · #94189 ·
HP 4192A GPIB measurements
Having gone to some effort to remove annunciations from the data collected using Prologix and EZGPIB I find it is not such a good idea. Some of those characters are warning that the numbers are
By peter bunge · #94188 ·
Re: HP8714ET Impedance
https://www.keysight.com/upload/cmc_upload/ck/zz-migration/images/AMER_9_WN_1.jpg
By pianovt · #94187 ·
Re: HP8714ET Impedance
As a reference, from the Maury Microwave precision calibration catalog the dimensions given for the two impedance N connector center pins are: 50 ohm: 0.0650¡± +/- 0.005¡± 75 ohm: 0.0355¡± +/-
By Greg Muir · #94186 ·
Hp 8903b display issue
I just received an HP 8903 B when plugged in the display seems to be incomplete some of the numbers aren't completing and I received no error but I cannot go any further the screen just displays
By oliver johnson · #94185 ·
Re: HP34702A Ohms converter issues
The ref current through R55 is ~1mA, R54 100?A, R53 10?A and R52 around 1.4 ?A - so the current is noticeably higher on the 1M¦¸ range.? Since the ohms converter output goes directly to the
By gregdunn@... · #94184 ·
Re: HP-IB not working on 85680B and unknown option again
I would still be inclined to look at the external cabling and the other end before opening up the instrument. Much more likely to be a problem with a connector than with the innards of the instrument,
By Steve Hendrix · #94183 ·
Re: HP8714ET Impedance
My dial caliper's jaws won't reach down inside the connectors I have, but I can estimate the pin diameter by laying them across the connector and using some magnification to line up the jaws with the
By Steve Hendrix · #94182 ·
Re: HP-IB not working on 85680B and unknown option again
Thanks for your commments. On startup the HP-IB address is displayed on the screen (18). I have tried to address it directly with no result. Same with polling. I have already ordered the two different
By dk1vi · #94181 ·
Re: HP8714ET Impedance
Steve, Perhaps you would report any connector numbers you find and which is which. I have a dial calibers here that would let me figure our what connectors I have here. Thanks. Roy Roy Morgan K1LKY
By Roy Morgan <k1lky68@...> · #94180 ·
Re: HP34702A Ohms converter issues
That's suspicious, and if A and B volts of Q15 are different, the feedback is not working. (have not looked at rest of schematic though). Does the manual say what I ref should be, and is it? (can
By John Griessen · #94179 ·
Re: HP34702A Ohms converter issues
They're all pushbutton switches, and I have (at least twice) cleaned the contacts with Deoxit.? It helped with some flaky behavior on the voltage ranges but did nothing for Ohms.? The upper 4 ohms
By gregdunn@... · #94178 ·