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The digital display of the Tektronix 6R1 is composed of four Burroughs [[B5092]] Nixie tubes for the digits, and one Burroughs [[B5094]] Nixie tube for the units. | The digital display of the Tektronix 6R1 is composed of four Burroughs [[B5092]] Nixie tubes for the digits, and one Burroughs [[B5094]] Nixie tube for the units. | ||
The [[3S2]] manual says: | |||
<blockquote> | |||
The Type 3S2 is compatible for operation with all Type | |||
230 Digital Units and all Type 6R1A Digital Units. It is | |||
compatible with all Type 6R1 Digital Units SN 695 and up. | |||
The Type 6R1 Digital Units SN 101-694 require the installation | |||
of Tektronix Modification Kit 040-0342-00 when operating with | |||
a Type 3S2. | |||
</blockquote> | |||
* Board A: COUNTER (6R1 has four of these) | * Board A: COUNTER (6R1 has four of these) |