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Re: HP 5360A Counter
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
By Terry Gains · #141230 ·
Re: HP 5360A Counter
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,
By Jim Ford · #141229 ·
Re: Agilent E4406A / 16700 CPU issue
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
By jmr · #141228 ·
Re: 410C VTVM Test Leads Coax Type Help
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
By n4buq · #141227 ·
Re: 410C VTVM Test Leads Coax Type Help
Ok. Yes... we used to call that the "DC input resistance' (and I'm pretty sure that HP did too.)... but, times change.
By Roy Thistle · #141226 ·
Re: 410C VTVM Test Leads Coax Type Help
Thanks for sharing that Adam.? That's definitely news to me.? GL! 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com
By Jeff AC0C · #141225 ·
Re: HP 5360A Counter
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
By factory · #141224 ·
Re: 410C VTVM Test Leads Coax Type Help
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
By Adam Attig · #141223 ·
Re: HP 5360A Counter
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
By Jeremy Nichols · #141222 ·
Re: Old style oval HP power cords
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
By Greg Muir · #141221 ·
Re: 410C VTVM Test Leads Coax Type Help
Yes - that's the DC VOLTS input impedance spec. Thanks, Barry - N4BUQ
By n4buq · #141220 ·
Re: HP 5360A Counter
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
By Cubdriver · #141219 ·
Re: HP 5360A Counter
National Semiconductor was of course absorbed into Texas Instruments about 10 or 20 years ago.? ? ? Jim FordSent from my T-Mobile 4G LTE Device
By Jim Ford · #141218 ·
Re: 410C VTVM Test Leads Coax Type Help
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
By Roy Thistle · #141217 ·
Re: 410C VTVM Test Leads Coax Type Help
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?
By Roy Thistle · #141216 ·
Re: HP 5360A Counter
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
By Jeremy Nichols · #141215 ·
Re: HP8510B Reading and writing A13 EEPROM, problem with Xicor x28256
I have successfully written at least 6 boards - only one has the failure described.? I'm (reasonably) sure it is weak EEPROM. It will take me a bit to dig up my verson of Wayne's code, but I will
By Bruce · #141214 ·
Re: HP 5360A Counter
At LSSM we do repairs on TTL circuitry all the time. National Semiconductor SSI ICs have, by far, the highest failure rate of all manufacturers' ICs. I had (and still have) great respect for NS, but
By Dave McGuire · #141213 ·
Re: HP 5360A Counter
I acquired one of these back circa 23 years ago. According to the knowledgeable seller it worked but had a bad time-base.? Ha! As some of you know, this engineering marvel has >100 SSI/MSI TTL ICs.?
By Dick Benson · #141212 ·
Re: Agilent E4406A / 16700 CPU issue
I'm not sure if you're following up my note but yes, 10.08 is latest and its updater program can also optionally install the latest version of the OS. Don't have it in front of me right now, but the
By John Ackermann N8UR · #141211 ·