Brianc wrote:I assume then, the there were calibration charts to go with the kit which translated dial readings to frequency. When you say "superhet frequency meter", Rob, does this mean that it has a reasonable amount of electronics inside?
Yes, you're absolutely right Brian.
Without the calibrated charts, the meter is pretty much useless.
Internally there's very little, two or three valves (6sk7?) and a (1Mc/s?) octal based crystal.
A popular mod in the 60's was to use these as a VFO for a transmitter, good stability after 20 mins or so warmup. The tuning mechanism is exceptionally well made, as is the whole of the meter. Unfortunately to get to the band switch, which seem to have a habit of rusting up solid, requires dismantling virtually the entire instrument. The knobs have a special splined Allen key, that should live inside in a little clip.