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Re: Help to fix power supply (A80) of an old HP 3586A
Is this the same board from the earlier images?? If so I hadn't imagined that Vinegar could remove the gold plating.? Overnight in white vinegar was quite excessive and has visibly damaged the
By freshndaire · #94140 ·
Re: HP 3314A - experience
Thanks for those hints. I also watched the easter egg video. Seems like the developers had some spare time to implement these kind of feature :-) I also managed to get a (very ugly PDF scan) service
By Tobias Pluess · #94139 ·
Re: Help with EZGPIB
On Mon, 04 Feb 2019 15:36:34 -0800, you wrote: What happens if you run the strip program, then copy the result string from the beginning up to the comma? In pascal, you can find the location of the
By Harvey White · #94138 ·
Help with EZGPIB
I am looking for help from someone experienced with EZGPIB, or possibly Pascal if any of this makes sense. I wrote a program in EZGPIB that is working well to get data from my HP4192A.?Each read of
By peter bunge · #94137 ·
Re: Help to fix power supply (A80) of an old HP 3586A
After any acidic wash, you should immediately give the board an alkaline final cleaning and scrubbing, and thorough rinse under hot tap water. Use liquid dish washing detergent and an old toothbrush
By Ed Breya · #94136 ·
Re: Help to fix power supply (A80) ofan old HP 3586A
That chip in socket is going to be a problem. The through hole solder can be touched up with flux and an iron.
By John Griessen · #94135 ·
Re: Help to fix power supply (A80) of an old HP 3586A
Thanks everybody I used white vinegar and it has removed perfectly all green?crusts from leaked alkaline. But maybe I exaggerated holding the cards for a whole night in the vinegar... now?the welds
By cc@... · #94134 ·
Re: Help to fix power supply (A80) of an old HP 3586A
Vinegar is also a decent way to remove leaked alkaline batteries from a flashlight, or damage from leaking batteries in a piece of equipment. You'd like to get the vinegar on as little extra circuitry
By Harvey White · #94133 ·
Re: Help to fix power supply (A80) of an old HP 3586A
I don¡¯t know about NiCad cells. But bubbling would not surprise me on a crusty leaked alkaline cell, as the stronger acetic acid would drive out the carbonic acid from the salts in the crust, and
By Carsten Bormann · #94132 ·
Re: 3325 opt002 bandwidth?
Hi, I'm sure there is a reason, which is probably what you just wrote. I just found it funny and imagined the doh moment, when someone realized they needed to redesign only the sticker. Which may not
By Szabolcs Szigeti · #94131 ·
Re: 3325 opt002 bandwidth?
Isn¡¯t that because the buttons on the 3325A are the old clicky ones and the 3325B later versions are the rubbery membrane type which have a slight difference in panel aperture spacing/size.. Just my
By nigel adams · #94130 ·
Re: HP8750A Storage Normalizer
Hi Peter! The guy took the original one, but I came across another the other day, so glad you wrote. I will verify and get back with details.Jeff
By Jeff Kruth · #94129 ·
Re: HP 8595E SYTF 5086-7803 PIN switch problem
I have also used National Test Equipment for some microcircuit repairs. I believe that when HP consolidated u-circuit manufacturing, then laid off that work force, quite a few of those folk got hired
By Don Bitters · #94128 ·
Re: Help to fix power supply (A80) of an old HP 3586A
Perhaps that may be so, in part, but if you take a nicad cell that is crusted up with whatever, and put it into a vinegar solution it will foam up vigorously for about 1/2 hour. There is so little CO2
By Chuck Harris · #94127 ·
Re: Unleveled E4436B
Yeah, I hear you on the ethical side.... I tend to consider just how far the needle swings on ethics. A 20 year old piece of gear that is no longer sold new and listed as obsolete doesn't really move
By Colby Burkett · #94126 ·
Re: Unleveled E4436B
It might be possible to fill the new freq cal area with something it won't complain about. But...software options definitely will invalidate. Regardless, I will still be trying to read the cal info
By Colby Burkett · #94125 ·
Re: hp 8657A
Looks to me like the bottom two pictures are the same pcb from differing positions. The upper image is a just a later revision of the board with the screen legend corrected and an SMA type connector
By nigel adams · #94124 ·
Re: New group on chip and wirebonding etc.
Very interesting!!!! Please subscribe me to the group. Jan Boutsen? ? ON4MMW
By Jan Boutsen · #94123 ·
Re: Help to fix power supply (A80) of an old HP 3586A
Another good acid is carbonic acid. In the presence of some water, this forms automatically from the CO2 in the air, so unless the spill was recent or the air was confined, the alkaline may already
By Carsten Bormann · #94122 ·
Re: HP 3490A repair
I know what you mean. Surprisingly the company who made them still makes them and will sell in smaller quantities. We usually buy 10 to 15 sets at a time. Regards, Stephen Hanselman Datagate Systems,
By Stephen Hanselman · #94121 ·
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