Products > Test Equipment

CH3-34 100MHz frequency counter 70's

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strawberry:
Repair in progress. Module Nr11 one off decade dividers flip-flop Nr3 is faulty.   

What fancy can be done with frequency counter? What experiments can be done? Some plans to use u-blox 7 to obtain reference

Inside21:
up to 120 MHz  :palm:
you may develop nice dizel-punk clocks

ataradov:
Yeah, for 120 MHz counter it takes up a lot of space. It is also not from the 70s. The design is from early 80s with most units made in mid-80s.

There was optional prescaler module that would bring it up to 3 GHz or something like this.

It is a nice toy if you have space to store it, but the most practical value of this unit is in the precious metals it has inside.

strawberry:
weight is to offset earth gravity effect on quartz stability ~10-8

wonder why they choose discrete TTL 500kHz ceramic hybrid, if available integrated circuits (CDIP)

not much precious metals, only for army or top precision

TimFox:
Interesting:  I've never seen "chicken-head" knobs with a central screw before.

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