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M461M
Type module
Category INPUT-PRE-AMPS
Try it simulator & front panel · download package (zip)
Earliest dated evidence 1976|9 — title block date
Evidence "8 SEPT 76" on 1975 - M461M - 461-01-002 - SOLO CONTROL SOLO COMMON CONTROL.jpg
Confidence high
All years found 1976|9
Used in jobs 76045 (1976|9)
Variants M461
Folder Modules/INPUT-PRE-AMPS/M461M

Connections and circuit (ideal SPICE model)

Drawn live from its RTO-144 connections: run the generator, turn the gain, watch the VU. Open the netlist to see how the model is built.

Pinout & connections

Each contact as its own documents name it: 19 named (19 high confidence). An empty slot is a contact no page names. Hover a contact for its source; the table under the drawing lists them.

EDGE CONNECTOR · A–YLETTERED SIDEA: MIC IN audio in · confidence high rto-144 · M461M.rto144.json, p. 1AMIC IN −INBCDEFHJKL: LINE audio in · confidence high rto-144 · M461M.rto144.json, p. 1LLINE −INM: FADER RETURN audio in · confidence high rto-144 · M461M.rto144.json, p. 1MFADER RETURN −INN: CHON OUT OUT audio out · confidence high rto-144 · M461M.rto144.json, p. 1NCHON OUT OUT −OUTP: INSERT RETURN audio in · confidence high rto-144 · M461M.rto144.json, p. 1PINSERT RETURN −INR: INSERT SEND audio out · confidence high rto-144 · M461M.rto144.json, p. 1RINSERT SEND −OUTST: RIGHT OUT audio out · confidence high rto-144 · M461M.rto144.json, p. 1TRIGHT OUT −OUTUVWXY: +24 V power rail · confidence high rto-144 · M461M.rto144.json, p. 1Y+24 VPWREDGE CONNECTOR · 1–21NUMBERED SIDE1: MIC IN audio in · confidence high rto-144 · M461M.rto144.json, p. 11MIC IN +IN2345678910: LINE audio in · confidence high rto-144 · M461M.rto144.json, p. 110LINE +IN11: FADER RETURN audio in · confidence high rto-144 · M461M.rto144.json, p. 111FADER RETURN +IN12: CHON OUT OUT audio out · confidence high rto-144 · M461M.rto144.json, p. 112CHON OUT OUT +OUT13: INSERT RETURN audio in · confidence high rto-144 · M461M.rto144.json, p. 113INSERT RETURN +IN14: INSERT SEND audio out · confidence high rto-144 · M461M.rto144.json, p. 114INSERT SEND +OUT1516: RIGHT OUT audio out · confidence high rto-144 · M461M.rto144.json, p. 116RIGHT OUT +OUT1718: COMMON ground / common · confidence high rto-144 · M461M.rto144.json, p. 118COMMONGND19: -25 V power rail · confidence high rto-144 · M461M.rto144.json, p. 119-25 VPWR20: COMMON ground / common · confidence high rto-144 · M461M.rto144.json, p. 120COMMONGND21: +25 V power rail · confidence high rto-144 · M461M.rto144.json, p. 121+25 VPWR
KEYIN audio inOUT audio outPWR power railGND ground / commonhigh: sheet
M461M-25 V 19+24 V Y+25 V 21M461MMIC INA·1LINEL·10FADER RETURNM·11INSERT RETURNP·13CHON OUT OUTN·12INSERT SENDR·14RIGHT OUTT·16COMMON 18·20CONNECTED TO · CONSOLES & JOBS (1)76045CFTO · 1976|9MADE OF · SUB-ASSEMBLIES (3)10-014Sub-assemblies (n-nnn)4-108Sub-assemblies (n-nnn)8-109Booster Amplifier Component…

pinout (SVG) · connections (SVG) · pins (JSON)

Pin evidence — 19 contacts
PinSignalKindConfidenceRead fromSource
AMIC INaudio inhighrto-144M461M.rto144.json, p. 1
1MIC INaudio inhighrto-144M461M.rto144.json, p. 1
LLINEaudio inhighrto-144M461M.rto144.json, p. 1
10LINEaudio inhighrto-144M461M.rto144.json, p. 1
MFADER RETURNaudio inhighrto-144M461M.rto144.json, p. 1
11FADER RETURNaudio inhighrto-144M461M.rto144.json, p. 1
NCHON OUT OUTaudio outhighrto-144M461M.rto144.json, p. 1
12CHON OUT OUTaudio outhighrto-144M461M.rto144.json, p. 1
PINSERT RETURNaudio inhighrto-144M461M.rto144.json, p. 1
13INSERT RETURNaudio inhighrto-144M461M.rto144.json, p. 1
RINSERT SENDaudio outhighrto-144M461M.rto144.json, p. 1
14INSERT SENDaudio outhighrto-144M461M.rto144.json, p. 1
TRIGHT OUTaudio outhighrto-144M461M.rto144.json, p. 1
16RIGHT OUTaudio outhighrto-144M461M.rto144.json, p. 1
18COMMONground / commonhighrto-144M461M.rto144.json, p. 1
19-25 Vpower railhighrto-144M461M.rto144.json, p. 1
20COMMON
also: COMMON (rto-144)		ground / commonhighrto-144M461M.rto144.json, p. 1
Y+24 Vpower railhighrto-144M461M.rto144.json, p. 1
21+25 Vpower railhighrto-144M461M.rto144.json, p. 1

Pictures

1975 - M461M - 461-01-002 - SOLO CONTROL SOLO COMMON CONTROL (2).jpg1975 - M461M - 461-01-002 - SOLO CONTROL SOLO COMMON CONTROL.jpg1975 - M461M - 461-02-004 - CONTRCL CONTROL.jpg1975 - M461M - 461-04-008 - INPUT MODULE ASSEMBLY.jpg1975 - M461M - 461-04-008 - MOD ICKD USED.jpg1975 - M461M - P1.jpg1975 - M461M - P2.jpg1975 - M461M - P3.jpg1975 - M461M - P4.jpg1975 - M461M - WBS 461M Pinouts.jpg1975 - M461M - WBS 461M Schematic 1.jpg1975 - M461 - WBS 461 Hookup Info.jpg

Physical manual inventory

Item Location Status Scanned
M461M Recently scanned and stiched by WB

Photos & scans (11)

Year File
1975|8 1975 - M461M - 461-01-002 - SOLO CONTROL SOLO COMMON CONTROL (2).jpg note
1975|8 1975 - M461M - 461-01-002 - SOLO CONTROL SOLO COMMON CONTROL.jpg note
1975|8 1975 - M461M - 461-02-004 - CONTRCL CONTROL.jpg note
1975|8 1975 - M461M - 461-04-008 - INPUT MODULE ASSEMBLY.jpg note
1975|8 1975 - M461M - 461-04-008 - MOD ICKD USED.jpg note
1975|8 1975 - M461M - P1.jpg note
1975|8 1975 - M461M - P2.jpg note
1975|8 1975 - M461M - P3.jpg note
1975|8 1975 - M461M - P4.jpg note
1975|8 1975 - M461M - WBS 461M Pinouts.jpg note
1975|8 1975 - M461M - WBS 461M Schematic 1.jpg note

Sub-assemblies & parts used (3)

Item What Family Year How we know
10-014 Sub-assemblies (n-nnn) 1988|21 named in its manual
4-108 Sub-assemblies (n-nnn) named in its manual
8-109 Booster Amplifier Component Layout Sub-assemblies (n-nnn) 1974|7 named in its manual

Parts list — board M461M (45 parts)

From 1975 - M461M - P3.jpg, page 1 (scanned); also in timelines/data/bom.csv.

Ref Part Value Manufacturer Mfr part no.
R55 delete)
R56 Resistor #w 5% 470K Phi lips
R57 de lete)
R58 delete
R59 de lete)
R60 Resistor #w 5% IK Phi Tips
SW2 Schadow WBS 11-002
SW3 clare-Pendar SB 2310
SW6 delete)
SW7 Switch Schadow WBS 11-002
SW8 de lete)
SW10 Swi tch Schadow WBS 11-005
SW12 WBS 11-004
SW13 (delete)
R20 Resi stor #w 15K Phi lips 5%
R25 (delete
R26 de lete
R27 delete
R28 delete E
R29 Resistor %W 5% 4K7 Phi lips 6
R3 R30 de lete delete . { .
R32 de lete
R33 de lete) _ "
R34 Resistor #W 5% 5.60 Phi ips Sf
R35 delete) 7
R36 Resi stor #w 5% 5.60 Philips
R38 (delete) ;
R39 delete)
R42 delete
R43 de lete
R44 de lete)
R45 Potentiometer dual A/ B WBS 10-003
R49 delete) :
R50 delete 4`
R5I de lete) 2` - - ~.
R52 de lete
R53 de lete)
R54 Potentiometer, ing le A/ B WBS 10-014
DS2 Light Bu b, V 387 28
R12 de lete) . ` '~ .
R13 Resi stor #w 5% Phi ]ips ;.^ 7{ 15K
R15 (delete)
R16 (delete) .o 'as
R17 Resi stor #w 59 Philips 15K
R19 (delete)

Consoles & jobs it is connected to (1)

Their own drawings name this module.

Job Year Drawing Page
76045 1976|9 1976 - 76045 - 01-010b.pdf 1

Named in other drawings & documents (2)

File Page
19xx - RTO-144 - Module RTO-144 Jumper calculator.xlsx 1
1975 - M461 - WBS 461 Hookup Info.jpg 1

From the manuals

Each manual split into its sections. Text that is the same in many Ward-Beck manuals (warranty, address, standard notes) is kept once on the Boilerplate page and linked.

Parts list (text) (1)

Parts List — 147 words · 1975 - M461M - P1.jpg, page 1

M46 IM INPUT MODULE PART DESCR PTION MFG MFG PART NUMBER Capacitor 22 uF/25 V Siemens 41313-45226-Z 8 0.022 uF CR Diode CR2 CR3 CRL CRS LED red Aselco cQ92-MC- 223M 1N4003 IRC Fairchild FLV 117 DS2 Light Bu b, 28 V 387 Transistor Nat_ Semic. PN 3569 PN 3645 TIP 29B TIP 30B PN 3569

8 Q6 Resistor #w 5% 15K I5K 3 3.30 , 30 30 R6 3 .30 R7 7 ` 15K R8 5K R9 R10 e . 15K R ]1 (delete R12 de lete) R13 Resi stor #w 5% 5K R14 15K R15 (delete) R16 (delete) R17 Resi stor #w 59 15K R18 15K R19 (delete) Texas Inst. Nat Semic_ 4 < . 4{ : '. PN 3645 .n Phi ]ips 6. ~ 't} .: ` : 3;": . ' . . ` '~ ;.^ c . 7 Phi ]ips .. 'as Phi]ips

Drawings (5)

Each scan with its trace laid over it: the slider runs from the scan to the vector drawing. Click one to see it large and save it as SVG, DXF, KiCad, PDF or PowerPoint.

461-01-002 · functional · 1976|9
Summing Bus Outputs Sblo Solo Control Common Soloviewer
461-01-002 · functional · 1976|9
Solo Control Solo Common Controlviewer
461-02-004 · schematic · 1975|8
Mod Ickd Usedviewer
461-04-008 · connector layout · 1975|8
Input Module Assemblyviewer
461-04-008 · connector layout · 1975|8
Mod Ickd Usedviewer

Read from the drawing title blocks.

Drawing Title Date Drawn by Checked by Iss. Source
461-01-002 Solo Control Solo Common Control 1976|9 ELJ (Eugene L. Johnson) file
461-01-002 Solo Control Solo Common Control 1976|9 ELJ (Eugene L. Johnson) file
461-02-004 Contrcl Control file
461-04-008 Mod Ickd Used MUE file
461-04-008 Input Module Assembly MNE file
An archive by Anthony Peter Kuzub · WBSps.Kuzub.com · WBSps.ca
generated from M461M.md