Products > Test Equipment
CH3-34 100MHz frequency counter 70's
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Njk:
F input, based on the spec. 1 or 5 MHz
strawberry:
internal base f=5MHz and built in sub div output 100.. 10.. 1MHz 100.. 10.. 1kHz  and separate 10MHz ref output and 9digit BCD readout output

found built in tunnel diode 200MHz divider

seems that micro modules contain silicon semiconductors and germanium is only actual discrete packages

it got built in memory that store reading (live count can be switched on/off) only 6digits contain memory for some reason

function diagram could have been better(near impossible to understand)

HP5245L ?
Wallace Gasiewicz:
The Nixie tubes are really cool, anything with Nixies is quite collectable although not as usable as more modern units.

I sold an American unit  (HP I think) unit like yours because an old friend REALLY wanted it.
As I recall in my unit the drivers for the Nixies were very hard to find, I did repair it and wish I would have kept it, gives a great "mad scientist" aura to the room.
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