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Experimentalists Anonymous

DOD 908A

Based on the DOD 908A

Category
Delay· Delay Echo and Samplers
Price
see vendor
Tags
Delay Echo and Samplers
Open the schematic at Experimentalists Anonymous

Schematic

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Check before you build · 1 value the reader of this schematic was not sure of
  • 100 at LM311 +12 feed: drawn like 110
RefValueNormalizedTypeNotes
Resistors 11
×5100100U1 and LM311 supply decoupling, 2N4124 emitter; the one at the LM311 +12 feed could read 110; read from the schematic by eye
×1330330pull-up at U12 D input; read from the schematic by eye
×31K1k-5 V supply dropper, 2N5089 emitter, U5 clock RC; read from the schematic by eye
×32K2kU1 output feedback, U1 sample-hold output, LM311 input; read from the schematic by eye
×46.8K6.8kDAC-08 V+/V- resistors on U2 and U13; read from the schematic by eye
×310K10kLM358 output, 2N4124 feedback, Repeat input; read from the schematic by eye
×133K33k2N4125 collector to oscillator; read from the schematic by eye
×175K75ksweep divider; read from the schematic by eye
×6100K100kinput bias, U9 reset pull-down, three CD4066 control inputs, 2N5089 base; read from the schematic by eye
×1470K470ksweep input; read from the schematic by eye
×13.9M3.9Msweep bias to +5; read from the schematic by eye
Capacitors 7
×125pF25pclock oscillator; read from the schematic by eye
×3120pF120pU2 and U13 DAC compensation, U5 clock RC; read from the schematic by eye
×1470pF470psample-hold capacitor at U15; read from the schematic by eye
×11.047uF47nsupply decoupling (U1, LM311, RAMs, rails) and LM358 output filter; read from the schematic by eye
×21uF1uelectrolytic; sweep filter and Repeat input; read from the schematic by eye
×310uF10uelectrolytic; input coupling, bias filter, -5 V filter; read from the schematic by eye
×3100uF100uelectrolytic; -12, +5 and +12 rail filters; read from the schematic by eye
Diodes 2
×2DiodeDIODEno part number given; series pair in the sweep path; read from the schematic by eye
×11N751A1N751A / 5V1zener, -5 V supply; read from the schematic by eye
Transistors 3
×12N41242N4124read from the schematic by eye
×12N41252N4125read from the schematic by eye
×12N50892N5089read from the schematic by eye
ICs 24
U1LF353LF353read from the schematic by eye
U2DAC-08DAC-08read from the schematic by eye
U34042B4042Bread from the schematic by eye
U4LM311LM311read from the schematic by eye
U574LS16474LS164drawn LS164; read from the schematic by eye
U674LS0074LS00drawn LS00; read from the schematic by eye
U8LM358LM358read from the schematic by eye
U9CD4024CD4024read from the schematic by eye
U1074LS15774LS157drawn LS157; read from the schematic by eye
U114042B4042Bread from the schematic by eye
U12AM2502AM2502read from the schematic by eye
U13DAC-08DAC-08read from the schematic by eye
U1474LS0074LS00drawn LS00; read from the schematic by eye
U15CD4066CD4066read from the schematic by eye
U16CD4024CD4024read from the schematic by eye
U1774LS15774LS157drawn LS157; read from the schematic by eye
U18MK4116MK411616K DRAM; read from the schematic by eye
U19MK4116MK411616K DRAM; read from the schematic by eye
U20MK4116MK411616K DRAM; read from the schematic by eye
U21MK4116MK411616K DRAM; read from the schematic by eye
U22MK4116MK411616K DRAM; read from the schematic by eye
U23MK4116MK411616K DRAM; read from the schematic by eye
U24MK4116MK411616K DRAM; read from the schematic by eye
U25MK4116MK411616K DRAM; read from the schematic by eye
Trimmers 2
×15K5kbias adjust at the input; read from the schematic by eye
×1100K100ksweep trim; R908 55 ms, R909 27 ms versions; read from the schematic by eye
Switches 1
×1SPDTSPDT8 kHz / 15 kHz clock select; read from the schematic by eye