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Date
Re: Does an HP Transformer Specification Document exist ?
Photo of the hp 9100-1415 Transformer ( small open frame unit on the Left side ):
By gren · #132763 ·
Re: strange issue on Agilent 54641D MSO
If I had to guess I would say bad contact at some point. I haven¡¯t pulled the schematic to see what the front end looks like but I¡¯m thinking something loose. It only does it on channel 1 correct,
By KB2LMN · #132762 ·
Re: Does an HP Transformer Specification Document exist ?
hi Clay, I am looking for specifications on the HV transformer? hp 9100-1415 ,? used in the hp 9100a Calculator ( ca. 1968 ), that powers its electrostatic CRT display ( hp 5083-1551 ). It would be
By gren · #132761 ·
Re: HP 8662A A2 Slots
The best description of the 8662/8663 power supply deficiencies that I¡¯ve seen is this YouTube video: https://youtu.be/9O8EQTKV5rI. The original power supply design is really, really poor and a
By Blue Smoke Lee · #132760 ·
Re: HP 8662A A2 Slots
The serial # would be on the label at lower right, the one that's been obliterated. Somebody reeeeally didn't want that serial # to be known. AFAIK it isn't recorded anywhere else. It doesn't seem to
By John Miles · #132759 ·
Re: HP 8662A A2 Slots
Is there a definitive document that details about the mods to the A2 boards and which ones should be present Also is the 8662a serial number in software available on the device
By colingoode2000 · #132758 ·
Re: HP 8662A A2 Slots
I haven¡¯t tried powering yet as there is a fault label on the front for the psu I Plan to remove all psu boards and test / replace caps etc before powering ? I can¡¯t find the serial number or may
By colingoode2000 · #132757 ·
Re: HP 8565A Spectrum Analyzer Noisy
Video filter has some effect but not big. Furthermore, both the noisy and the clean traces have the video filters set at the OFF position.
By Pax Electronica · #132756 ·
Re: Advice on how to use an SA for test point troubleshooting
Chuck - Gotta agree with the mind reading comment. Thanks! What I suspect is the "test point" is probably a connection between circuit elements (amp, splitter, modulator,etc.) and they specified the
By Bruce · #132755 ·
Re: Advice on how to use an SA for test point troubleshooting
Hi Bruce, I agree, but the person specifying that you look at that point needs to define how. And, I am pretty sure they did... if one looks. Reading minds is a perilous task when you are up to your
By Chuck Harris · #132754 ·
Re: Does an HP Transformer Specification Document exist ?
I have wondered the same thing about HP transformers over the years.? HP In Loveland, Colorado for years had a separate facility we referred to as the Components Building.? They wound transformers
By freshndaire · #132753 ·
Re: Advice on how to use an SA for test point troubleshooting
Hi Tony Just looking at your post and the excellent advice given I think there are a few pointers I can give you as I strongly advise you invest in the following I use DC blocks on my spectrum
By Paul Bicknell · #132752 ·
Re: HP 8662A A2 Slots
Er, not EEPROMs, but EPROMs, probably 2732s or 2764s. -- john, KE5FX Sent: Sunday, February 19, 2023 12:16 PM To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment]
By John Miles · #132751 ·
Re: HP 8662A A2 Slots
Yeah, that's an updated CPU board with a lithium battery. Not super common, but a good upgrade from the original design that put NiCds next to the most expensive/delicate RF hardware. The older 8662As
By John Miles · #132750 ·
Re: strange issue on Agilent 54641D MSO
It has been doing it for like 2 months or so. No abuse or measurement that triggered it (at least not something I recall, it has not been used much lately) Wilko
By Wilko Bulte · #132749 ·
Re: Hot air soldering tool
Another vote for the Quick 861DW - I've had one for a few years, it's always performs very well, no matter if you're trying to reflow a couple surface mount resistors with the air turned way down, or
By Andrew Hakman · #132748 ·
Re: Advice on how to use an SA for test point troubleshooting
You may also use a differential probe, it is important to pay attention to the probe's input impedance and the common mode rejection ratio (CMRR) of the probe and oscilloscope. The input impedance of
By KB2LMN · #132747 ·
Re: Advice on how to use an SA for test point troubleshooting
One type of probe that could be used for this purpose is a passive probe with a bandwidth of at least 500 MHz and a maximum input voltage that exceeds +2 dBm. A passive probe is typically less
By KB2LMN · #132746 ·
Re: 5086-7337 *Yig Oscillator issue*
Yup, you got point :) I¡¯ll search a resistor to apply that method, ohm law at it¡¯s best. Regards, Ruben
By RubenRubio · #132745 ·
Re: Advice on how to use an SA for test point troubleshooting
Both SAs and Scopes measure voltage. If a signal level is CORRECTLY specified in dBm, the impedance must be 50 ohms unless otherwise stated. All that is necessary to do is the mathematical conversion
By Bruce · #132744 ·