¿ªÔÆÌåÓý

Date
Re: HP8340A SYTM broken?
Hi, "Sven Schnelle" <svens@...> writes:
By Sven Schnelle · #129539 ·
Re: VNA Calibration - Port Impedance - a late life ponder
I may not have been clear with my question. I am not using two VNAs to measure each other What are you measuring? IF I used one to measure the other, What does it mean? Are you comparing one vs the
By Gianni · #129538 ·
Re: VNA Calibration - Port Impedance - a late life ponder
I may not have been clear with my question. I am not using two VNAs to measure each other - I realize that may not actually be practical. That was my way of setting up the question. IF I used one to
By [email protected] · #129537 ·
Re: HP6060B Electronic Load - Need Binding Posts/Rack Mount Kit
I have a suggestion for a way to approach the rear connector usability problem. I like to have my 175W Kikusui electronic load ready to use. It is located on my bench about 18 inches up from the
By tgerbic · #129536 ·
Re: HP6060B Electronic Load - Need Binding Posts/Rack Mount Kit
Hello Eric, I will contact you off-list. Thank you for the offer, I hope the postage will not be a deal breaker.
By Alex · #129535 ·
Re: 8660C restoration attempt
Ruben - Good job on the fan - with proper cleaning, almost any fan can be restored. When you start on the PLL, be sure to try to access the drive from the various PLLs (main chassis, and 2 in the opt
By Bruce · #129534 ·
Re: 8660C restoration attempt
Antonio - Thanks, that is an interesting proposition. I¡¯ll take your word, maybe in the near future need some parts. Have you plugins? Which? Today I¡¯ve checked the rectifiers, all bridges are ok,
By RubenRubio · #129533 ·
Re: HP microfiche collection / scanning
It's not test gear, but I'd be very interested to know whether there are any service manuals or related documents regarding calculators, with two-digit part numbers prefixed with "000", e.g.
By Eric Smith · #129532 ·
Re: 8660C restoration attempt
Hi Ruben ! Should you need some replacement parts, I have a complete HP-8660C parted for sale. I am in Portugal. Regards Antonio/CT1TE --- A 2022-09-14 22:36, RubenRubio escreveu:
By Antonio A. S. Magalhaes · #129531 ·
Re: VNA Calibration - Port Impedance - a late life ponder
What VNA are using ? Are the 2 units in measurement mode ? do you know the status of each port?.... If in measurement mode the unit measuring the port of the other VNA receive the signal from the
By Gianni · #129530 ·
Re: HP microfiche collection / scanning
I believe I have some leftover 8410 manuals hat I would be happy to part with. Let me look them up and contact me off line Cheers! Bruce Quoting "Gianni via groups.io"
By Bruce · #129529 ·
Re: 8510B and KE5FX plotter software
Update: Today, I have found out that the Arduino based AR488 adapter lets me get screen shots from my 8510B with the KE5FX software all right, even if connected via Bluetooth. So, there's a cheaper
By tom_iphi · #129528 ·
Re: Suffering from RIFA anxiety!
Paper has a lot of dielectric absorption compared to any of the plastics. Charge a while, briefly discharge, and see what stayed behind. Or put it on a bridge and measure capacitance at two
By Dave Wise · #129527 ·
Re: Suffering from RIFA anxiety!
On 9/15/22 04:22, Ed Breya via groups.io wrote: > Now, thinking about these caps some more, what is truly different, compared to millions of other parts that existed concurrently? Lots and lots of
By Dave McGuire · #129526 ·
Re: Suffering from RIFA anxiety!
Oh I'm not arguing that epoxy doesn't shrink. I think most people are aware that epoxies generally shrink. What I'm talking about is that series of Rifa capacitors swelling, cracking, and bl
By Dave McGuire · #129525 ·
HP 53131A frequency counter fails self test
Hi folks, I have an HP 53131A that fails the self test. The message is "FAIL - MEAS". Channel 1 is not working, channels 2 and 3 appear to be working Ok. Power supply rails are fine. This unit has the
By RadioNZ · #129524 ·
Re: Suffering from RIFA anxiety!
Yes! Measurement procedure and suitable threshold values would be the task of said Master's student :-) (From a very high impedance source, with the DUT turned off, I¡¯d presume.) 250 V ? ¡Ì2 ?
By Carsten Bormann · #129523 ·
Re: Suffering from RIFA anxiety!
I guess the big deal for me is before the USA followed Europe down the power line safety rabbit hole, ... before any capacitors made by RIFA, WIMA, etc. darkened our shores... we used ordinary beeswax
By Chuck Harris · #129522 ·
Re: Suffering from RIFA anxiety!
Well, there is an easy, non-destructive way to tell if the capacitors inside of Schaffner filters are degraded: Measure them! The filters are PI filters, and as such bring the safety capacitors right
By Chuck Harris · #129521 ·
Re: 8660C restoration attempt
Ruben yes thats a big issue. The HP fans are pretty reasonable to take a part and relube the bearings. That may get you past that issue for a while. Also in general the covers need to be on to insure
By paulswed · #129520 ·