Enclosure not stated · 7 knobs
DOD R825
Based on the DOD R825
- Category
- Compressor· Compressors Gates and Limiters
- Controls
- De-Ess Level · Input Level · Output Level · De-Ess Output · Ratio · Attack · Release
- Price
- see vendor
- Tags
- Compressors Gates and Limiters
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 57 rows
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Check before you build · 4 values the reader of this schematic was not sure of
- 62K meter ladder resistor: handwritten, could be 82K
- 10uF at Attack: first of the two reads like 100F, could be 100uF
- side-chain out shunt resistor: no value drawn
- switch pole counts inferred from dashed gang lines
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 18 | ||||
| ×22 | 20K | 20k | read from the schematic by eye | |
| ×15 | 100K | 100k | includes the 100k resistors drawn in parallel with each VCA trimmer; read from the schematic by eye | |
| ×12 | 10K | 10k | read from the schematic by eye | |
| ×9 | 4.7K | 4.7k | read from the schematic by eye | |
| ×5 | 47K | 47k | read from the schematic by eye | |
| ×4 | 18K | 18k | read from the schematic by eye | |
| ×3 | 3.3K | 3.3k | read from the schematic by eye | |
| ×3 | 51 | 51 | read from the schematic by eye | |
| ×3 | 680 | 680 | output build-out resistors; read from the schematic by eye | |
| ×2 | 1K | 1k | read from the schematic by eye | |
| ×1 | 470 | 470 | read from the schematic by eye | |
| ×1 | 62K | 62k | meter ladder; could be 82K; read from the schematic by eye | |
| ×1 | 24K | 24k | meter ladder; read from the schematic by eye | |
| ×1 | 12K | 12k | meter ladder; read from the schematic by eye | |
| ×1 | 6.8K | 6.8k | meter ladder; read from the schematic by eye | |
| ×1 | 820 | 820 | read from the schematic by eye | |
| ×1 | 2K | 2k | across the Attack pot; read from the schematic by eye | |
| ×1 | ? | ? | side-chain out to ground, no value drawn; read from the schematic by eye | |
| Capacitors 7 | ||||
| ×3 | .0018uF | 1.8n | filter caps; read from the schematic by eye | |
| ×4 | 10uF | 10u | electrolytic; one at the Attack pot reads like 100F, could be 100uF; read from the schematic by eye | |
| ×4 | 4.7uF | 4.7u | electrolytic; read from the schematic by eye | |
| ×2 | 25pF | 25p | read from the schematic by eye | |
| ×1 | .1uF | 100n | side-chain input; read from the schematic by eye | |
| ×2 | 470uF | 470u | supply filter; read from the schematic by eye | |
| ×2 | 47uF | 47u | regulator outputs; read from the schematic by eye | |
| Diodes 2 | ||||
| ×9 | 1N4148 | 1N4148 | read from the schematic by eye | |
| ×4 | 1N4001 | 1N4001 | bridge rectifier; read from the schematic by eye | |
| Transistors 1 | ||||
| ×1 | 2N5089 | 2N5089 | read from the schematic by eye | |
| ICs 17 | ||||
| U1 | LF353 | LF353 | read from the schematic by eye | |
| U2 | RC4558 | RC4558 | read from the schematic by eye | |
| U3 | RC4558 | RC4558 | read from the schematic by eye | |
| U4 | RC4558 | RC4558 | read from the schematic by eye | |
| U5 | RC4558 | RC4558 | legend entry reads like U8 but sits in the U5 position; read from the schematic by eye | |
| U6 | RC4558 | RC4558 | read from the schematic by eye | |
| U7 | LF353 | LF353 | read from the schematic by eye | |
| U8 | LM324 | LM324 | meter comparators; read from the schematic by eye | |
| U9 | LF353 | LF353 | read from the schematic by eye | |
| U10 | RC4558 | RC4558 | read from the schematic by eye | |
| U11 | LF353 | LF353 | read from the schematic by eye | |
| U12 | LF353 | LF353 | read from the schematic by eye | |
| U13 | LF353 | LF353 | read from the schematic by eye | |
| U14 | dbx 2150A | DBX 2150A | VCA; read from the schematic by eye | |
| U15 | dbx 2150A | DBX 2150A | VCA (de-esser); read from the schematic by eye | |
| ×1 | LM7812 | LM7812 | +12V regulator; read from the schematic by eye | |
| ×1 | LM7912 | LM7912 | -12V regulator; read from the schematic by eye | |
| Potentiometers 7 | ||||
| De-Ess Level | 100K | 100k | Potentiometer | read from the schematic by eye |
| Input Level | 100K | 100k | Potentiometer | read from the schematic by eye |
| Output Level | 100K | 100k | Potentiometer | read from the schematic by eye |
| De-Ess Output | 100K | 100k | Potentiometer | read from the schematic by eye |
| Ratio | 100K | 100k | Potentiometer | read from the schematic by eye |
| Attack | 100K | 100k | Potentiometer | read from the schematic by eye |
| Release | 100K | 100k | Potentiometer | read from the schematic by eye |
| Trimmers 1 | ||||
| ×2 | 100K | 100k | VCA symmetry trims, one each at U14 and U15, from +12/-12; read from the schematic by eye | |
| Switches 3 | ||||
| De-Ess | 4PDT | 4PDT | ganged poles drawn: two at the input, De-Ess output, LED; pole count inferred; read from the schematic by eye | |
| In/Out | 3PDT | 3PDT | poles: input, output, LED; pole count inferred; read from the schematic by eye | |
| Side Chain | DPDT | DPDT | poles: side-chain input, LED; read from the schematic by eye | |
| LEDs 1 | ||||
| ×9 | LED | LED | 5 meter LEDs (20dB, 10dB, 6dB, 3dB, Thresh), power, In/Out, Side Chain, De-Ess; read from the schematic by eye | |