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IBM server I found in my stash of junk. Soon to the scrap yard...

My 8663A was a real sick puppy in need of TLC 15 years ago, or thereabouts. The re-build took 9 months, I thought I had replaced all that had failed even the o-rings in the attenuators. I was never

One more thing: The 'Input Sensitivity' switch, gang E, rear, looks promising -- it has a contact that alternates on the "1" and "3" settings. So R38, R39, R41, C25, all could be suspects???

I got a 3581C with 1 or 2 issues. The manual from Agilent has schematics and everything, but the resolution is poor and I can't read some details. By chance does anyone have a better schematic image?

Photo of the hp 9100-1415 Transformer ( small open frame unit on the Left side ):

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,

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

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

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

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

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

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.

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

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

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

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

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]

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

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

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