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M520K — Stereo Input
Type module
Category INPUT-PRE-AMPS
Try it simulator & front panel
Earliest dated evidence 1988|21 — estimate from a dated variant
Evidence from M520
Confidence family
Variants M520, M520A
Folder Modules/INPUT-PRE-AMPS/M520K

Front panel

Pinout & connections

No page of its own numbers M520K's contacts: these are its variant M520A's, drawn faded — not confirmed for M520K.

EDGE CONNECTOR · A–ZLETTERED SIDE · AS ON M520AABCDEFHJKLMNPRSTUV: LOGIC CONTROL COMMON ground / common · confidence variant (from a variant) prose · 1988 - M520A - M520A_Page_16.jpg, p. 1 “The logic control common connects to P2 pin V of the module connector_ Power_Supply_Decoupling The +/-25 volts applied to P2 pins 21 and 19 is regulated down t…”VLOGIC CONTROL COMMONGNDWX: COMMON RETURN FOR THE +/-25 VOLT SUPPLIES ground / common · confidence variant (from a variant) prose · 1988 - M520A - M520A_Page_16.jpg, p. 1 “The common return for the +/-25 volt supplies is at P2 pins 20 and X while the main frame chassis connection is at P2 pin 22.”XCOMMON RETURN FOR THE …GNDYZEDGE CONNECTOR · 1–34NUMBERED SIDE · AS ON M520A12: 48 VOLT MICROPHONE PHANTOM POWER power rail · confidence variant (from a variant) prose · 1988 - M520A - M520A_Page_16.jpg, p. 1 “The 48 volt microphone phantom power is applied to pin P2 pin 2 of the module connector; 4-4”248 VOLT MICROPHONE PHA…PWR34567891011121314151617181920: COMMON RETURN FOR THE +/-25 VOLT SUPPLIES ground / common · confidence variant (from a variant) prose · 1988 - M520A - M520A_Page_16.jpg, p. 1 “The common return for the +/-25 volt supplies is at P2 pins 20 and X while the main frame chassis connection is at P2 pin 22.”20COMMON RETURN FOR THE …GND2122: COMMON RETURN FOR THE +/-25 VOLT SUPPLIES ground / common · confidence variant (from a variant) prose · 1988 - M520A - M520A_Page_16.jpg, p. 1 “The common return for the +/-25 volt supplies is at P2 pins 20 and X while the main frame chassis connection is at P2 pin 22.”22COMMON RETURN FOR THE …GND2324252627282930313233: OUTPUT FROM THIS AMPLIFIER audio out · confidence variant (from a variant) prose · 1988 - M520A - file.pdf, p. 14 “The output from this amplifier is fed through mixiDg resistorsRl82 and R183, which feeds the prefade listen signal to the mixing bus via module connectorPl pin…”33OUTPUT FROM THIS AMPLI…OUT34: OUTPUT FROM THIS AMPLIFIER audio out · confidence variant (from a variant) prose · 1988 - M520A - file.pdf, p. 14 “The output from this amplifier is fed through mixiDg resistorsRl82 and R183, which feeds the prefade listen signal to the mixing bus via module connectorPl pin…”34OUTPUT FROM THIS AMPLI…OUT
KEYOUT audio outPWR power railGND ground / commonvariant
M520K — Stereo Inputpins as on its variant M520A (not confirmed for M520K)48 VOLT MICRO… 2M520KSTEREO INPUTOUTPUT FROM THIS…33·34LOGIC CONTROL… VCOMMON RETURN… X·20·22

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

Pin evidence — 7 contacts
PinSignalKindConfidenceRead fromSource
248 VOLT MICROPHONE PHANTOM POWERpower railvariantprose1988 - M520A - M520A_Page_16.jpg, p. 1
“The 48 volt microphone phantom power is applied to pin P2 pin 2 of the module connector; 4-4”
VLOGIC CONTROL COMMONground / commonvariantprose1988 - M520A - M520A_Page_16.jpg, p. 1
“The logic control common connects to P2 pin V of the module connector_ Power_Supply_Decoupling The +/-25 volts applied to P2 pins 21 and 19…”
XCOMMON RETURN FOR THE +/-25 VOLT SUPPLIESground / commonvariantprose1988 - M520A - M520A_Page_16.jpg, p. 1
“The common return for the +/-25 volt supplies is at P2 pins 20 and X while the main frame chassis connection is at P2 pin 22.”
20COMMON RETURN FOR THE +/-25 VOLT SUPPLIESground / commonvariantprose1988 - M520A - M520A_Page_16.jpg, p. 1
“The common return for the +/-25 volt supplies is at P2 pins 20 and X while the main frame chassis connection is at P2 pin 22.”
22COMMON RETURN FOR THE +/-25 VOLT SUPPLIESground / commonvariantprose1988 - M520A - M520A_Page_16.jpg, p. 1
“The common return for the +/-25 volt supplies is at P2 pins 20 and X while the main frame chassis connection is at P2 pin 22.”
33OUTPUT FROM THIS AMPLIFIERaudio outvariantprose1988 - M520A - file.pdf, p. 14
“The output from this amplifier is fed through mixiDg resistorsRl82 and R183, which feeds the prefade listen signal to the mixing bus via mo…”
34OUTPUT FROM THIS AMPLIFIERaudio outvariantprose1988 - M520A - file.pdf, p. 14
“The output from this amplifier is fed through mixiDg resistorsRl82 and R183, which feeds the prefade listen signal to the mixing bus via mo…”

Pictures

1988 - M520K - 1 (2).jpg1988 - M520K - 1.jpg1988 - M520K - 2 (2).jpg1988 - M520K - 2.jpg1988 - M520K - 3 (2).jpg1988 - M520K - 3.jpg1988 - M520K - 4 (2).jpg1988 - M520K - 4.jpg1988 - M520K - 4_small.jpg1988 - M520K - wbsps - module - m520k - 1_small.jpg1988 - M520K - wbsps - module - m520k - 2_small.jpg1988 - M520K - wbsps - module - m520k - 3_small.jpg

Price history

Year Kind Price Listed as Effective Source
2005|38 used market value 100.00 M520K Stereo Input wbsps - website ARCHIVE/WBSPS 2008/ARCHIVE/old website/PriceGuide.htm
2006|39 used market value 100.00 M520K Stereo Input wbsps - website ARCHIVE/WBSPS 2008/ARCHIVE/jan 2006 shell/priceguide.htm

Photos & scans (12)

Year File
1988|21 1988 - M520K - 1 (2).jpg note
1988|21 1988 - M520K - 1.jpg note
1988|21 1988 - M520K - 2 (2).jpg note
1988|21 1988 - M520K - 2.jpg note
1988|21 1988 - M520K - 3 (2).jpg note
1988|21 1988 - M520K - 3.jpg note
1988|21 1988 - M520K - 4 (2).jpg note
1988|21 1988 - M520K - 4.jpg note
1988|21 1988 - M520K - 4_small.jpg note
1988|21 1988 - M520K - wbsps - module - m520k - 1_small.jpg note
1988|21 1988 - M520K - wbsps - module - m520k - 2_small.jpg note
1988|21 1988 - M520K - wbsps - module - m520k - 3_small.jpg note

Named in other drawings & documents (3)

File Page
1995 - M405P - ITEMIMP(1).TXT (2).docx 1
1995 - M405P - ITEMIMP(1).TXT.docx 1
1995 - M405P - ITEMIMP.TXT.docx 1
An archive by Anthony Peter Kuzub · WBSps.Kuzub.com · WBSps.ca
generated from M520K.md