I don't agree. At this point the accusations have already been made and you can't un-do those. But the accused has more than adequately acquitted himself in the eyes of the electronics community so I

Keyword spamming? One guy that I used to know included the phrase "not HP calculator" in the title of all of his E-bay listings so that his auction listings would show up everytime anyone searched for

I doubt it, the HP self tests are pretty accurate in my experience. It sounds like you got someone's parts mule. Their in an HP group on groups.io, you might check with them.

#photo-notice

"My question then is this. What should those of us with large collections of Tek and other electronic equipment do while we are standing? I have over 50 scopes, a large collection of rare cameras, and

Dave, Are these the same tapes (DC-300XLP, IIRC) that were used in many of the early HP desktop computers such as the HP-85? If they are, it's VERY unlikely that you will EVER be able to recover data

Here is a PDF of the datasheet for the Greyhill 71BDF30-02-2-AJN switch that was recommended for the tester. The stop pins are shown on page 11. < http://www.farnell.com/datasheets/20309.pdf> If your

For holes that were impossible to clear otherwise, I use a pin vise and a small drill bit and I drill through the built up solder. It only takes a few seconds. I use a bit that is slightly smaller tha

Sorry, I know that this is OT but I have to add my 2 cents worth here. I live only a few miles from a beach on the Atlantic coast of Florida and I've been visiting this area or living here and/or alon

I was in a surplus store today in Melbourne, Florida and found a nice looking, CLEAN, rack mount 561A that is for sale. It didn't appear to have been drop kicked around the parking lot or left out in

I live quite near KSC (Kennedy Space Center) and NASA stuff is COMMON around here. KSC used to have monthly auctions where they auctioned off a warehouse full of everything that you can imagine. Next

I can't say regarding Tek gear but I have an HP-67 that went through a house fire. It was in it's original plastic box and about 2 inches in one corner of it melted and one small corner of the HP-67 m

Thats exactly why I will not ship anything via UPS. They routinely handle cargo exactly like the gorillas in the old American Tourister ads handled suit cases. I shipped my 576 via FexEx and they were

Roy, that's not true. About 15 years ago I obtained 13 E and F series HP 1000 computers and 8 extra power supplies from a large US military contractor. I powered them up and the RIFA caps blew up in a

< https://becg.org.uk/> I don't need the manuals but that looks like a worthwhile project This might be of interest to you < http://radiolondon.co.uk/rl/bentoney/bookp1.html> I knew Ben and we worked

Tek probably specified two 2 Ohm resistors instead of one 4 ohm resistor since they would allow twice as much heat dissipation. Yes, you could probably use a larger wattage resistor but the one larger

That would suffix for a low frequency and low sensitivity voltmeter but many voltmeters contain an active amplifier in the probe itself. You might want to look up the HP 8405A Vector Voltmeter for det

#chat-notice

I haven't worked on much Tektronix equipment but your experience agrees with my experience on HP and some other GOOD brands of TE. I rarely find bad caps in them so I always recommend against replacin

In my experience, a scope isn't a good instrument to use for measuring voltages with a high degree of accuarcy. it's too easy to have parallax errors on a scope and the lines themselves are too large

The material used for cores in chokes and transformers makes a huge difference in their characteristics. Also the internal capacitance, resistance and inductance of the windings makes a huge differenc

Leo, I see that you took the x-former in your pictures apart. Did you ever determine what the internal failure mode was? General comment. As Leo's pictures show, transformer failures can be tough to d