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Re: HP1743A scope
- The probe power sockets on the Tek 454 were Sealectro brand. - The HP 1740A is from a later era than the Tek 453/454. The contemporary Tek generation was the much lighter 465 family. - The HP 174X
By Raymond Domp Frank · #145466 ·
Re: HP1743A scope
The first scope I used at work was a 1740A - similar but with a vernier dial rather than the LED display for the timebase delay. My boss was a big HP fan and probably inspired my own enthusiasm for
By Adrian Godwin · #145465 ·
Re: HP1743A scope
Thanks Nigel, yes I suppose so too. I had a look at the Lemo site. There's a tool to find your particular kind of plug. You select the number of pins and plenty of parameters which I did and the thing
By Renaud F5ZR · #145464 ·
VNA calibration kit to 50 GHz
Making good quantitative measurement using a vna requires a decent calibration kit. So i'm just wondering the most cost effective way of getting hold of one which works up to 50 GHz. Sure, you can buy
By neil · #145463 ·
Re: HP1743A scope
I think the power plugs on the Tek scope may be a Lemo type¡­ Hope it helps Regards Nigel Sent: Friday, July 12, 2024 9:11 AM To: [email protected] Subject:
By nigel adams · #145462 ·
HP1743A scope
Hi, I was just given this (rather dirty, but what does one say about the given horse?) cutie: Considered "portable" (if you don't mind 15 kG) Any comments welcome as usual. By the way I also have that
By Renaud F5ZR · #145461 ·
Re: HP 8566B - Can my high voltage transformer be faulty?
I'll check. Is it mounted to the chassis, or is it on a board? Which board? Dave Casey [email protected]> wrote:
By Dave Casey · #145460 ·
Re: How to remove the output cable of the isolator in the 8672A
Many thanks. This is exactly the information I was (unfortunately) looking for.
By Erik Kaashoek · #145459 ·
Re: Bubble Memory Reseed
On thinking some more on this, I'd guess that the necessary info in the battery-backed memory would be the "bad bit" map of the particular bubble unit in the machine, so you can tell which ones to use
By ed breya · #145458 ·
Re: Bubble Memory Reseed
I have a 3561A, and have never encountered need for any kind of special module, but I did have to do something in the menu/setup/diagnostic controls. There is a re-something function built into the
By ed breya · #145457 ·
Re: HP 8563E - CRT turns on only after waiting for a while turned off
Hi The 3x -2.45kV wires going to the CRT are not part of the PDA high voltage supply they are the CRT heater supply and cathode supply. Be careful there were more than one design of power supplies
By george edmonds · #145456 ·
Re: Checking HP 8672A output level: are these drops normal?
Tactical military radios, eh, Pete?? I did that for Raytheon for a few years 2017 to 2020 when the work dried up.? We were building and repairing 225-450 MHz, 25, 50, and 100 watt radios.? After
By Jim Ford · #145455 ·
Re: HP 8563E - CRT turns on only after waiting for a while turned off
HI Saevar I have had HP switch mode power supplies that do not work if you replace the old electrolytics with modern 105C high ripple current low ESR ones, fit new 85C standard electrolytic capacitors
By george edmonds · #145454 ·
Re: Bubble Memory Reseed
https://electrickery.nl/comp/pc5000/bubble.html ( https://electrickery.nl/comp/pc5000/bubble.html ) Detailed history: http://www.wylie.org.uk/technology/bubblmem/bubblmem.htm Regards,? WT
By 2notlit · #145453 ·
Re: Bubble Memory Reseed
John, If you havent already then check this out. https://hackaday.io/project/172227-bubble-memory-reseed-and-dummy-boards
By 2notlit · #145452 ·
Re: Checking HP 8672A output level: are these drops normal?
Hi Don Where did you work at HP?? ?I was there from 77-2001 first in Paramus, NJ then Rockaway, NJ attached to NJD.? ?We were known as ERRC (office 4401).? Your name is familiar to me. I too
By WB2UAQ · #145451 ·
HP 8563E - CRT turns on only after waiting for a while turned off
Hi all Among my recent purchases, I recently got a 8563E which I believed was functioning. It powered on when I first got it and all good except several of the buttons didn't work. I cleaned those and
By saevar · #145450 ·
Re: How to remove the output cable of the isolator in the 8672A
Hi Erik It has been over 25 years since on worked on the 8671, 2, and 3 and other microwave synthesizers of that era (HP service center 1977-2001).? I worked on many of them. If I remember correctly
By WB2UAQ · #145449 ·
Re: HP 8566B - Can my high voltage transformer be faulty?
Hi Dave Casey, The part that seems to be broken is: 0960-0383 VARO MH920E03 Do you have one of those in a good shape?
By saevar · #145448 ·
Re: HP 8566B - Can my high voltage transformer be faulty?
I have some new 85662- series HV assemblies of various types that I got in a parts lot awhile back. They look like they may have been part of some kind of service/upgrade kit because they also came
By Dave Casey · #145447 ·