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Re: How to check the accuracy of an HP 5342A frequency counter
Complicating the issue is the presence of a frequency adjust trimmer on each unit, which presents an unknown as to whether it has been adjusted and by whom.? It's a strong possibility that this
By Bob Albert <bob91343@...> · #105634 ·
Re: How to check the accuracy of an HP 5342A frequency counter
The ¡°three oscillator¡± approach is a practice that has been used by NIST (NBS) for decades for comparison of their frequency & time standards. It also provides a level of redundancy should there
By Greg Muir · #105633 ·
HP5351B High frequency input connector
The high-frequency input connector on an HP 5351B I just purchased appears to be missing the input connector. I believe it was an APC-3.5. There appears to be a missing insert. I'm looking for tips on
By Jim Potter · #105632 ·
Re: Semiconductor test set advice
Quite complete info on the Tek 575/175 is here: https://www.pearl-hifi.com/06_Lit_Archive/15_Mfrs_Publications/35_Tektronix/Tek_575_175_Trans_Curve_Tracer.pdf including 1963 catalogue pages, the
By Liam Perkins · #105631 ·
Re: Semiconductor test set advice
He sold himself to the company's (largely nontechnical) management as a "cool" modern developer who could develop "cool" and "fresh" web interfaces. He went on to go from employee to contractor, then
By Dave McGuire · #105630 ·
Re: Semiconductor test set advice
...and we wonder these days why people have the attention span of a hyperactive gnat. It aggravates me when they constantly make little changes to interfaces so that things that were there are either
By Cubdriver · #105629 ·
Re: Semiconductor test set advice
The team lead on the C++ project I alluded to in another thread was like that. I found delicious irony in the outcome of the story. When ARCO got bought, BP was not allowed to keep ARCO's North Slope
By Reginald Beardsley · #105628 ·
Re: Semiconductor test set advice
OMG who hired that idiot! David
By David C. Partridge · #105627 ·
Re: Semiconductor test set advice
Sean, the option for the Tek 575 that's eluding you is Mod 122C - it adds a third range of 0-400V @ 0.5A to the 0-20V @ 10A and 0-200V @ 1A collector sweep supply of the standard instrument. -Pat
By Cubdriver · #105626 ·
Re: Semiconductor test set advice
Actaully I think it's what a lot of the kids DO want. If it looks the same as it did yesterday, it's not "FRESH!" I worked with some developers a few years ago that were of that mindset. They were
By Dave McGuire · #105625 ·
Re: Semiconductor test set advice
Yeah, complete UI/UX changes with web services seem to be par for the course these days. Farcebook is a leading example. But I digress... Another thing to keep in mind with the Tek curve tracers is
By Sean Turner · #105624 ·
Anyone from HP that worked on the design of the 1700 Series Scopes?
I am trying to find details on parts used in the design of the 1703A and the 1707B. Specifically the FET's used in Option 20 the Vertical Output Amplifier. These would be matched FET's HP Part number
By Sam Reaves · #105623 ·
Re: How to check the accuracy of an HP 5342A frequency counter
FWIW General Radio in the instructions for one of its early frequency measuring assemblies recommended the "three oscillator" method of measuring differences. Where a source is being compared to WWV
By Richard Knoppow · #105622 ·
Re: How to check the accuracy of an HP 5342A frequency counter
First, make sure the Rb standard is locked. Second, couple the output of the Rb to a receiver and check it against WWV. Adjust the coupling so that the Rb signal is about the same strength as WWV. You
By Edward Newman · #105621 ·
Wanted: HP 8445b Preselector
hi, Wanted: HP 8445b Preselector . Please contact me off-list. thank you, rick
By gren · #105620 ·
Re: How to check the accuracy of an HP 5342A frequency counter
Thanks Chuck for that information.? I suspect that my rubidium reference may be on the old side.? I bought it used over 8 years ago and I used it a fair amount as a frequency reference for my Flex
By Terry Maurice <ve3xtm@...> · #105619 ·
Re: Semiconductor test set advice
Occulus, Thanks. Yahoo changed the interface so that it doesn't show unread messages in the SPAM bin :-( As a consequence I've been forgetting to check and empty it as I used to do every day. I do
By Reginald Beardsley · #105618 ·
Re: How to check the accuracy of an HP 5342A frequency counter
Atomic references are in general, short lived. Cs beam's run out of vacuum, or out of Cs (some debate about that!). Rb references plate out the Rb metal on the lamp's glass bulb, and get to a point
By Chuck Harris · #105617 ·
Re: How to check the accuracy of an HP 5342A frequency counter
I fully agree to Ed Breya. Your Rb standard very probably is not locked, 17ppm off is a typical sign for that. All such OCXOs (10544 or 10811) can never be out that far, if they are operating
By Dr. Frank · #105616 ·
Re: Maximum depth of HP rack mountable gear?
Avoid IKEA. Much of their furniture is hollow on the inside, especially the worktop desk surfaces. El Wife found that out painfully when drilling... With best regards Tam HANNA Enjoy electronics? Join
By Tam Hanna · #105615 ·