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-nuts_lists.febo.com and follow the instructions there.
