Hi I still have a 524 with a 500 MHz plugin sitting in one of my sheds. I used to keep a fairly large house fan aimed at the critter to keep it from tripping its Klixon thermal overload switch. Ahhhh they were the days indeed. Bob KE6F
-----Original Message----- From: Dave Mallery <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Mon, Jan 21, 2019 8:02 pm Subject: Re: [time-nuts] HP Stories: Frequency Counter business in high school, i had a summer job at the NYU EE dept up in the Bronx campus (where my dad taught english!) this was the summer of 1956 and 57. in the lab equipment issuing room there lived a 524 with the vertical neon lites. along with a plethora of other now ancient equipment. long ago in a galaxy far away... 73 dave mallery On Mon, Jan 21, 2019 at 5:04 PM Don <[email protected]> wrote: > http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1951-01.pdf > On Mon, 2019-01-21 at 14:15 -0500, Gordon Batey wrote: > > Greetings to all, > > > > I believe that was the HP 525 counter. I had one as my first > > counter > > which I picked up surplus many years ago. It had several plug-ins > > for > > different > > frequency ranges. Kept the basement warm in the winter time. The > > vhf > > plugin was a heterodyne mixer as I recall. This unit ontained MANY > > tubes > > and a > > fairly large fan to remove the heat. I gave it to another ham > > several years > > ago. > > > > > > I really enjoy the HP stories. > > > > Gordon Batey > > WA4FJC > > > > > > > > Hi, > > I used an HP counter in 1961 that had these vertical strings of neon > > tubes > > behind numbers, and the two least significant decimals were read off > > two > > milliamp meters numbered 0 to 10. For each count the needles would > > point to > > the number to be read. The whole instrument was a 2 foot cube that > > sat on a > > trolley. > > After all this time I can not remember the model number. Our company > > repaired Air force instruments and recalibration of frequency > > ?meters? > > (calibrated heterodyne oscillators). > > Cheers, > > Neville Michie > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nut > > s_lists.febo.com > > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > -- Dave Mallery, K5EN (ubuntu linux 18-10) 80018 Lobo CP Grants, NM 87020 linux counter #64628 (since 1997) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
