ARP 1036 SAMPLE & HOLD / RANDOM VOLTAGE
The ARP 1036 Sample & Hold / Random Voltage Generator ... Two of the circuit shown below were built on a single board.
SCHEMATIC
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ARP 1036 SAMPLE & HOLD / RANDOM VOLTAGE The ARP 1036 Sample & Hold / Random Voltage Generator ... Two of the circuit shown below were built on a single board. SCHEMATIC - (click on image to download full-sized version)
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PARTS LIST
| Resistors | 1/4 watt, 10%, carbon composite |
| 56 Ohm | R24, R25 |
| 100 Ohm | R13 |
| 330 Ohm | R12 |
| R53, R59 (select) | |
| 10 K | R18, R21, R32, R38, R39 |
| ? | R56 |
| ? | R36, R40, R54 |
| ? | R31, R58 |
| ? | R29 |
| 47 K | R26, R52 |
| 68 K | R19 |
| 100 K | R4, R22, R34, R35 |
| 150 K | R3, R6, R9, R20 |
| 1 Meg | R47, R49 |
| 1.5 Meg | R44 |
| 22 Meg | R16 |
| Trim Pots | Linear Taper |
| 10 K | R30, R46 |
| 50 K | R10, R41, R51 ? |
| Capacitors | 20%, 35 volt, tantalum |
| 1.0 uF | C1, C2 +4A+B |
| Capacitors | 20%, 50 volt, ceramic disc |
| 30 pF | C11, C12, C16, C17 |
| 50 pF | C10, C19 |
| 100 pF | C13 |
| .001 uF | C7, C8, C14 (61 nF) |
| .01 uF | C3, C6, C15 (10 nF) |
| 0.1 uF | C18 (100 nF) |
| SEL | ? |
| Capacitors | 20%, 50 volt, polycarbonate |
| .027 uF | C5 (27 nF) |
| .015 uF | C9 (15 nF) |
| Diodes | |
| 1N4148 | CR1 thru CR9 |
| Potentiometers | Linear Taper |
| 10 K | R7, R26 |
| Transistors | |
| A2803-004-A * | Q1 - Noise Select |
| TZ81 ** | Q2, Q3, Q5 |
| 2N5172 | Q4, Q6 |
| Integrated Circuits | |
| LM301AH | Z1, Z2, Z3 |
* - an ARP part number, most likely a 2N5172. Not all 2N5172's are good as a noise source, so these would have been tested and selected.
** - TZ-81 alternate part was the 2N5249, also defunct. 2N3904 would be a modern equivalent. Also a 2N3906 would be the modern substitute for the TZ-581 (alternate 2N5367) that ARP used as the PNP complement to the TZ-81.