32,959
edits
6R1: Difference between revisions
Jump to navigation
Jump to search
no edit summary
(one section per board) |
No edit summary |
||
| Line 16: | Line 16: | ||
boards in total. | boards in total. | ||
* | *Board A: COUNTER (6R1 has four of these) | ||
* | *Board B: DIVIDE BY 1,2,5 | ||
* | *Board C: MASTER GATE | ||
* | *Board D: SIGNAL COMPARATOR (6R1 has two of these) | ||
* | *Board E: VOLTMETER | ||
* | *Board F: UPPER LIMIT NO-GO | ||
* | *Board G: LOWER LIMIT NO-GO | ||
* | *Board H: LIGHT LIMIT DRIVER | ||
* | *Board I: DIVIDE BY 10 | ||
* | *Board J: ANALOG DISPLAY | ||
* | *Board K: 0% ZONE | ||
* | *Board L: MEMORY (6R1 has two of these) | ||
When a 6R1 is used in a 567 with a [[3T77]], the horizontal sweep signal is | When a 6R1 is used in a 567 with a [[3T77]], the horizontal sweep signal is | ||
| Line 38: | Line 38: | ||
to pin 7 of the 0% zone card. | to pin 7 of the 0% zone card. | ||
== | == Board K: 0% ZONE == | ||
The primary purpose if the 0% ZONE circuit is to produce | The primary purpose if the 0% ZONE circuit is to produce | ||
a signal that instructs the memory circuits to sample and hold the voltages at their | a signal that instructs the memory circuits to sample and hold the voltages at their | ||
| Line 59: | Line 59: | ||
is the logical complement of the +0% signal, generated by common-emitter inverter Q64. | is the logical complement of the +0% signal, generated by common-emitter inverter Q64. | ||
== | == Board L: MEMORY == | ||
The 6R1 contains two MEMORY | The 6R1 contains two MEMORY boards, one for vertical input A and one for vertical input B. | ||
Each MEMORY card contains two sample and hold circuits. | Each MEMORY card contains two sample and hold circuits. | ||
The main purpose of the MEMORY card is to sample and hold its vertical signal during the | The main purpose of the MEMORY card is to sample and hold its vertical signal during the | ||
| Line 115: | Line 115: | ||
the +GATE signal goes down to 0V. That turns off Q3 and | the +GATE signal goes down to 0V. That turns off Q3 and | ||
returns D13 and D23 to the original low-voltage state. | returns D13 and D23 to the original low-voltage state. | ||
== Board A: COUNTER (6R1 has four of these) == | |||
Each COUNTER board contains four flip-flops and functions as one | |||
digit of a decimal counter. Since the 6R1 has a four-digit decimal | |||
counter, it has four COUNTER boards. These boards have two functions | |||
aside from counting. First, they contain the NPN transistors that | |||
drive the Nixie tubes of the digital readout. Second, each COUNTER | |||
board contains a simple digital-to-analog converter (DAC) that produces | |||
a voltage proportional to the current count. This STAIRCASE voltage is | |||
used by the UPPER and LOWER LIMIT NO-GO boards. | |||
== Board B: DIVIDE BY 1,2,5 == | |||
== Board C: MASTER GATE == | |||
== Board D: SIGNAL COMPARATOR (6R1 has two of these) == | |||
== Board E: VOLTMETER == | |||
== Board F: UPPER LIMIT NO-GO == | |||
== Board G: LOWER LIMIT NO-GO == | |||
== Board H: LIGHT LIMIT DRIVER == | |||
== Board I: DIVIDE BY 10 == | |||
== Board J: ANALOG DISPLAY == | |||
[http://w140.com/tek_6r1_schem.pdf 6R1 Schematics] | [http://w140.com/tek_6r1_schem.pdf 6R1 Schematics] | ||