Hi Rick, wonder if the operators needed their hearing calibrated after long exposures to that :) A long time ago I designed and built a 1KHz ultra-low-distortion signal generator using the original H/P design (Wien bridge(?) with a small lamp for amplitude stability). That lamp is a great seismic sensor. bye, Said In a message dated 8/15/2009 13:19:28 Pacific Daylight Time, [email protected] writes:
A well used trick with the HP608 signal generator, which did not have frequency modulation, was to mount a speaker on the side of the case and drive it with 1 kHz to generate FM using microphonics. It supposedly worked quite well and could even be calibrated. Rick Karlquist N6RK _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
