[time-nuts] Vintage Frequency Measurement
namichie at gmail.com
Sun Feb 12 05:19:48 EST 2017
Back in the early sixties I worked in a lab adjusting filters for line transmission.
We had numerous oscillators, built to be boat anchors, and CROs set up for X-Y display.
The lab had 100hz, 1kHz, 10kHz standards wired in.
We were expert at recognising lisajou figures. We might have several oscillators running together,
and we could establish almost any frequency with precision.
Calibting an oscillator would not have been difficult.
Cheers, Neville Michie
> On 12 Feb 2017, at 5:08 PM, Scott Stobbe <scott.j.stobbe at gmail.com> wrote:
> I was inspired recently coming across a Lampkin 105 frequency meter, as to
> how frequency measurement was done before counters.
> Certainly zero-beating a dial calibrated oscillator, would be one approach.
> Is there a standout methodology or instrument predating counters?
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