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Hi Graham, One of my 8640 gen fx readout started showing all zeros.? Have not trouble shot yet but can use aux output into a counter for readout.? Your problem made me want to take a look at it.?

Hi All Does anybody know which fingers on the two range switch sections go to which dividers in the time base section.? My counter appears to work from 0.5MHz to 16MHz and then produces silly results

Are you still looking for an E4406A power supply module? I have one that is complete, but I don't know how well it works, or even if it works. You're welcome to it for shipping costs from 92109. Stan

Think I may have found the Grey lead... **** Mogami W2546 75ohm Coax https://www.performanceaudio.com/products/mogami-w2546-75ohm-coax-audio-video-cable-by-the-foot ****

Hi Paul, Wow. That is next level genius. I'm reminded of the https://www.eevblog.com/forum/projects/led-display-for-hp-3457a-multimeter-i-did-it-)/ project with respect to the aftermarket display mods

Ah, Apex Electronics! As I've posted here before or to TekScopes or Test-Equipment-For-Sale-Wanted-or-Exchange, I used to go there decades ago when it was on my way home from work. Lotsa great stuff,

It's a good idea to grab the synth calibration file via FTP before doing a firmware update. The update process is arranged to try to preserve this cal file, but it is really easy to allow it to be

This is from one of the PDF manuals of the 410C I have. I suppose I should have used "resistance" instead of "impedance". The AC VOLTMETER section does use "impedance" and rightfully so. Thanks, Barry

Ok. Yes... we used to call that the "DC input resistance' (and I'm pretty sure that HP did too.)... but, times change.

Thanks for sharing that Adam.? That's definitely news to me.? GL! 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com

I've heard of Apex Electronics, there was a video tour on youtube not too long ago, a lot of the older TE seemed to be reversed for film prop use. Haven't seen any 5360 sold over here for over a

Good discussion everyone. Note, from Ashley at KissElectonics "HP used shielded wire in the "C", custom made by HP for these leads. The OHMS shielded cable was colored RED to distinguish it from the

The whole semiconductor industry was that way, first working around the clock to satisfy demand and then laying people off the next year as over-supply set in. We in the Santa Clara photomask

There are a large number of manufacturers who make compact adapters that go between various styles of AC connectors (especially involving IEC C13/C14 series). It would be nice for someone to come up

Yes - that's the DC VOLTS input impedance spec. Thanks, Barry - N4BUQ

I too worked at National in the 80s - was at the Danbury, CT fab from 1984 until they closed it in 1990. ?The TTL and transistor lines there were still running 3" wafers on old equipment. ?Most of

National Semiconductor was of course absorbed into Texas Instruments about 10 or 20 years ago.? ? ? Jim FordSent from my T-Mobile 4G LTE Device

I did. IMO, just ordinary... but 'good' cable. Like Perrier is good water... and you pay (a lot), for the carbon dioxide. Unless you want to pretend to be a Rolling Stones roady... which I guess some

Isn't that the DC resistance? With an input impedance of a few pF, the DC "impedance" should be much higher... unless it's a reasonably leaky capacitor?

I worked for National 1979-1990 and can confirm at least some of the problems were due to management’s unwillingness to spend money maintaining (much less improving) process and equipment. Jeremy