Enclosure not stated · 4 knobs
Gibson RD77 Artist Guitar Electronics
Based on the Gibson RD77 Artist Guitar Electronics
- Category
- EQ / Filter· Tone Control and EQs
- Price
- see vendor
- Tags
- Tone Control and EQs
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 110 rows
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Check before you build · 4 values the reader of this schematic was not sure of
- R41: value cut off at the page break
- R42: read 15M ±10%, could be 1.5M
- C12: bass value read "10/50V", likely 1.0uF
- SW2: pole/throw count inferred
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 58 | ||||
| R1 | 4.7M | 4.7M | read from the schematic by eye | |
| R2 | 4.7M | 4.7M | read from the schematic by eye | |
| R3 | 22K | 22k | read from the schematic by eye | |
| R4 | 33K | 33k | read from the schematic by eye | |
| R5 | 33K | 33k | read from the schematic by eye | |
| R6 | 1M | 1M | read from the schematic by eye | |
| R7 | 4.7M | 4.7M | read from the schematic by eye | |
| R8 | 4.7M | 4.7M | selected (biasing, see note 5); read from the schematic by eye | |
| R9 | 470K | 470k | read from the schematic by eye | |
| R10 | 22K | 22k | read from the schematic by eye | |
| R11 | 10K | 10k | read from the schematic by eye | |
| R12 | 68K | 68k | read from the schematic by eye | |
| R13 | 10K | 10k | read from the schematic by eye | |
| R14 | 1M | 1M | read from the schematic by eye | |
| R16 | 1M | 1M | read from the schematic by eye | |
| R17 | 1.5M | 1.5M | read from the schematic by eye | |
| R18 | 3.3M | 3.3M | read from the schematic by eye | |
| R20 | 100K | 100k | read from the schematic by eye | |
| R21 | 100K | 100k | read from the schematic by eye | |
| R22 | 10K | 10k | read from the schematic by eye | |
| R23 | 330 | 330 | read from the schematic by eye | |
| R24 | 33K | 33k | read from the schematic by eye | |
| R25 | 220K | 220k | read from the schematic by eye | |
| R26 | 470K | 470k | read from the schematic by eye | |
| R27 | 470K | 470k | read from the schematic by eye | |
| R28 | 22K | 22k | guitar value; bass 33K (table); read from the schematic by eye | |
| R29 | 1M | 1M | read from the schematic by eye | |
| R30 | 4.7M | 4.7M | read from the schematic by eye | |
| R31 | 4.7M | 4.7M | read from the schematic by eye | |
| R32 | 22K | 22k | read from the schematic by eye | |
| R33 | 3.3K | 3.3k | read from the schematic by eye | |
| R34 | 4.7M | 4.7M | read from the schematic by eye | |
| R35 | 1M | 1M | read from the schematic by eye | |
| R36 | 22K | 22k | read from the schematic by eye | |
| R37 | 22K | 22k | read from the schematic by eye | |
| R38 | 1M | 1M | read from the schematic by eye | |
| R39 | 4.7M | 4.7M | read from the schematic by eye | |
| R40 | 470 | 470 | read from the schematic by eye | |
| R41 | ? | ? | value cut off at the page break (only "M" visible); read from the schematic by eye | |
| R42 | 15M | 15M | ±10%; read from the schematic by eye | |
| R43 | 4.7M | 4.7M | selected (biasing); read from the schematic by eye | |
| R44 | 470K | 470k | read from the schematic by eye | |
| R45 | 2.7K | 2.7k | read from the schematic by eye | |
| R46 | 10K | 10k | read from the schematic by eye | |
| R47 | 15K | 15k | read from the schematic by eye | |
| R48 | 22K | 22k | read from the schematic by eye | |
| R49 | 22K | 22k | read from the schematic by eye | |
| R50 | 47K | 47k | read from the schematic by eye | |
| R52 | 18K | 18k | read from the schematic by eye | |
| R55 | 18K | 18k | read from the schematic by eye | |
| R56 | 10K | 10k | read from the schematic by eye | |
| R57 | 4.7M | 4.7M | selected (biasing); read from the schematic by eye | |
| R58 | 470K | 470k | read from the schematic by eye | |
| R59 | 10K | 10k | read from the schematic by eye | |
| R60 | 3.3K | 3.3k | read from the schematic by eye | |
| R61 | 470K | 470k | read from the schematic by eye | |
| R62 | 1K | 1k | read from the schematic by eye | |
| R103 | 15K | 15k | read from the schematic by eye | |
| Capacitors 29 | ||||
| C1 | 0.0047uF | 4.7n | bass 0.01uF (table); read from the schematic by eye | |
| C2 | 47uF | 47u | 10V; read from the schematic by eye | |
| C3 | .47uF | 470n | 50V; read from the schematic by eye | |
| C4 | .47uF | 470n | 50V; read from the schematic by eye | |
| C5 | 0.047uF | 47n | bass 0.1uF (table); read from the schematic by eye | |
| C6 | 47uF | 47u | 10V; read from the schematic by eye | |
| C7 | 0.1uF | 100n | bass 0.22uF (table); read from the schematic by eye | |
| C8 | 0.0047uF | 4.7n | bass 0.01uF (table); read from the schematic by eye | |
| C9 | 10uF | 10u | 35V tantalum; bass 15uF/35V tantalum (table); read from the schematic by eye | |
| C10 | 47uF | 47u | 50V; read from the schematic by eye | |
| C11 | 0.0047uF | 4.7n | bass 0.01uF (table); read from the schematic by eye | |
| C12 | 0.47uF | 470n | 50V; bass 1.0uF/50V (table, read "10/50V"); read from the schematic by eye | |
| C13 | 0.0068uF | 6.8n | bass 0.015uF (table); read from the schematic by eye | |
| C14 | 0.022uF | 22n | bass 0.047uF (table); read from the schematic by eye | |
| C15 | 1.0uF | 1u | 50V; bass 2.2uF/25V (table); read from the schematic by eye | |
| C16 | 4.7uF | 4.7u | 25V; bass 10uF/16V (table); read from the schematic by eye | |
| C18 | 2.2uF | 2.2u | 25V; read from the schematic by eye | |
| C19 | 2.2uF | 2.2u | 25V; read from the schematic by eye | |
| C20 | 47uF | 47u | 10V; read from the schematic by eye | |
| C21 | 0.01uF | 10n | bass 0.022uF (table); read from the schematic by eye | |
| C22 | 330pF | 330p | bass 680pF (table); read from the schematic by eye | |
| C23 | 100pF | 100p | read from the schematic by eye | |
| C24 | 1.0uF | 1u | 50V; bass 2.2uF/25V (table); read from the schematic by eye | |
| C25 | 0.0039uF | 3.9n | bass 0.0068uF (table); read from the schematic by eye | |
| C26 | 0.022uF | 22n | drawn "0022"; bass 0.039uF (table); read from the schematic by eye | |
| C27 | 1.0uF | 1u | 50V; bass 2.2uF/25V (table); read from the schematic by eye | |
| C28 | 47uF | 47u | 10V; read from the schematic by eye | |
| C29 | 1.0uF | 1u | 50V; bass 2.2uF/25V (table); read from the schematic by eye | |
| C30 | 47uF | 47u | 10V; read from the schematic by eye | |
| Diodes 4 | ||||
| CR1 | 1N4148 | 1N4148 | per note 3; read from the schematic by eye | |
| CR2 | 1N4148 | 1N4148 | per note 3; read from the schematic by eye | |
| CR5 | 1N4004 | 1N4004 | read from the schematic by eye | |
| CR6 | 1N4004 | 1N4004 | read from the schematic by eye | |
| Transistors 10 | ||||
| Q1 | SF51234 | SF51234 | N-JFET; replace only with SF51234 or selected factory part; read from the schematic by eye | |
| Q2 | SF51234 | SF51234 | N-JFET; replace only with SF51234 or selected factory part; read from the schematic by eye | |
| Q4 | 2N3904 | 2N3904 | read from the schematic by eye | |
| Q5 | 2N3904 | 2N3904 | read from the schematic by eye | |
| Q6 | 2N3904 | 2N3904 | read from the schematic by eye | |
| Q7 | SF51234 | SF51234 | N-JFET; replace only with SF51234 or selected factory part; read from the schematic by eye | |
| Q8 | SF51234 | SF51234 | N-JFET; replace only with SF51234 or selected factory part; read from the schematic by eye | |
| Q9 | SF51234 | SF51234 | N-JFET; replace only with SF51234 or selected factory part; read from the schematic by eye | |
| Q10 | SF51234 | SF51234 | N-JFET; replace only with SF51234 or selected factory part; read from the schematic by eye | |
| Q11 | SF51234 | SF51234 | N-JFET; replace only with SF51234 or selected factory part; read from the schematic by eye | |
| ICs 2 | ||||
| IC1 | CD4007AE | CD4007AE | sections IC1A, IC1B, IC1C used; read from the schematic by eye | |
| A1 | TL022CP | TL022CP | dual op amp, A1A and second half; read from the schematic by eye | |
| Potentiometers 4 | ||||
| Rhythm Vol | A100K | A100k | Potentiometer | R101, 30% audio; read from the schematic by eye |
| Lead Vol | A100K | A100k | Potentiometer | R102, 30% audio; read from the schematic by eye |
| Treble | 100K | 100k | Potentiometer | R51; read from the schematic by eye |
| Bass | 100K | 100k | Potentiometer | R53; read from the schematic by eye |
| Trimmers 1 | ||||
| R15 | 1M | 1M | delay time adjust, factory set; read from the schematic by eye | |
| Switches 2 | ||||
| SW1 | 3P3T | 3P3T | mode switch: compress / normal / lead EQ; read from the schematic by eye | |
| SW2 | DP3T | DP3T | pickup selector: rhythm / both / lead; pole count read from lug numbering, uncertain; read from the schematic by eye | |