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* Total = 368 | * Total = 368 | ||
Grand Total = approx. 2300 | Grand Total = approx. 2300 | ||
</blockquote> | </blockquote> | ||
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The right compartment holds the digital unit, either a [[6R1]] or a [[6R1A]]. | The right compartment holds the digital unit, either a [[6R1]] or a [[6R1A]]. | ||
It is possible to operate a 567 without the digital unit but | It is possible to operate a 567 without the digital unit but | ||
in that configuration it provides only the functionality that | in that configuration it provides only the functionality that a [[561]] provides. | ||
a [[561]] provides. | |||
The [[6R1]] and [[6R1A]] digital units have several different operating | The [[6R1]] and [[6R1A]] digital units have several different operating | ||
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the 10% voltage. The counter counts the number of cycles of a | the 10% voltage. The counter counts the number of cycles of a | ||
built-in crystal clock. When the signal reaches the 90% voltage, | built-in crystal clock. When the signal reaches the 90% voltage, | ||
the counter is stopped and the count is displayed on the nixie | the counter is stopped and the count is displayed on the [[nixie | ||
tube digital numeric readout. The units and decimal place of the | tube]] digital numeric readout. The units and decimal place of the | ||
digital unit are controlled by switch contacts on the timing unit plug-in, | digital unit are controlled by switch contacts on the timing unit plug-in, | ||
which connect to the digital unit through a | which connect to the digital unit through a multi-pin connector in | ||
the 567. | the 567. | ||
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programmer to the [[6R1]] or [[6R1A]] that is in the 567. | programmer to the [[6R1]] or [[6R1A]] that is in the 567. | ||
There is an extender plug-in, the [[067-0505-00]], that allows a [[6R1]] or [[6R1A]] to be operated | There is an extender plug-in, the [[067-0505-00]], that allows a [[6R1]] or [[6R1A]] | ||
outside the plug-in bay of the 567 for maintenance purposes. | to be operated outside the plug-in bay of the 567 for maintenance purposes. | ||
==Specifications== | ==Specifications== |