[time-nuts] Vintage Frequency Measurement

Dave Brown tractorb at ihug.co.nz
Sun Feb 12 20:22:54 UTC 2017


Also Motorola and Schomandl had similar instruments-I have one of the latter here I'm still trying to get a replacement meter for. The Gertsch and Motorola instruments were very similar to look at but not identical.  The Schomandl was distinctly different with its tall vertical design.
DaveB, NZ


> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Mike
> Garvey
> Sent: Monday, 13 February 2017 2:36 a.m.
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Vintage Frequency Measurement
> 
> Look at (Singer) Gertsch Frequency Meter.  This was standard measuring
> equipment in our (spectroscopy) lab in 1975.
> Mike
> 
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of
> Neville Michie
> Sent: Sunday, February 12, 2017 05:20
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Vintage Frequency Measurement
> 
> 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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