Scott 299A Schematic

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CHANIEL A INPUT

SHIELD

CHANNEL A PRE AMP
® 11AX7

IcHANMa. A
RECORDER OUTPUT

SCRATCH HLTEIT

CHANNEL A AF MP

@A 12AX7A @

@

CHANNEL A AF AMP
E IiAX7A®

I'

CHANNEL A
L u

509K

LWKC?

C NNEL A HF AMP
A ECFSO

150mm

@2200

@lN:H

CHANNEL A OUTPUT

@ LINE

cHA NNEL A

SPEAKIRYERMINAL
MK DOARD
I75v DC
100K Lw fines
mmmv CHANNEL A CHANNEL
TREELE A I
Dr. ® Ac 1 .
@ TAP D 500K B BALANCE 280V
1 HIGH
R
@ 1° 100K 1w mAImor
CHANNEL A Ff BIAL ADJLIST
PICKUP szTcH .Im 27 comm ImI
INPUT sELEcToR SWITCH IMIzI _
SHLNIN IN EURYE POSITION. @ mm smcmn szTcN (M13) @ 555 @
swncH SEQUENCE: SECTIDN 2 sHaNN NEAL A" POSITION . CHANNEL A OUTPUT
L ENRTD WK SWWEH SEQUENCE : VOlUME CHANNEL A PHASE INV 7189
2. RLAA NARTa oRTHu 1 BA s®a ECFBO @
1 "Am WE i PBAAOLNELIRALIIEDRDS @ WK
2 L23? 0 ° °)_4 A: 5mm NUMBERS ASSIGNED To coILs. SWITCIES, PLUGS, SOCKETS, AND
mox @ 5m @ i REVERSE STEREO TRANSFORMERS ARE To EACILITATE cIACINT TITAcINc 0R com-
.41 U SECTION? E cNANNEL A POMM HEPLAcEMENT AND MAY NOT NECESSARILY BtFOUND ON
9 o u a FRONT 7 CHANNEL I: THE IINIT.
cHANNEL B
WM mm RECORDER ouTPuT
5 fi CHANNEL B NT AMP N u i
CHANNELS PRE-AMP @A 12AX7A @I CHANNELB AT AMP CHANNEL a AF AMP CH% EL7 D ggTPUT
® IZAX7 ® @3 11Ax7A v9 1
YAPE H m SCRHCH FILTER W- @
7 mI<
m I .
- .I 47 W av @ CHANNEL B
E SHIELD z SPEAKER TERMINAL
CHANNEL B INPUT 150mm 1m.
295v BRN m BOARD
MAG! my non
RED 4»
Isoo 3
My? 3 aesv 7L.
? / BALKANCE BLUE HIGH RED
.nn -'- L I
'mvz RNNIDLEEILIER @I @zfiflmnfl 250v.
ouT [- NomAL®
@ lmeg L Ammf lOUDNESS
MAGZ m PHASE
7 SWIYCH
m e ® @ -|11 TOARMDT SHIELD
' CHANNELD VOLUME I BIAS ADJUST
PIcKuP SWITCH 22 I coNTRuLIRvI
47K @
:HANNEL 3 INPUT -
, VOlUME
TUNER 9 560K * CHANNEL B PHASE INV CHANNEL B OUTPUT
é 9.3 ecrao @ 7139
TAPE 5w M101-
: m SEcTIoNT 355
, sEIrnoN I @ mom SOUREE
NEAR
RESISTANCE READINGS 150K 295v
, . ° ° 0 SDUNCE
ITEM TLIDE PInT sz Pm: Pm P|n5 Pmb PmT Pms Pm ° 230v
VI 12sz BBOK 2.2m; 25mm an 120 mm 47K 25mm 60 0 NOV 30m!
v2 IzAxIA VLLSK 1.5m; 15000 350 no mSK 2.2mm; mm mm . 5:33:02
1. Dc voltage measuremems xaknn ANN vacuum Lubevoltmmer; v3 EcEDD ILDsK 175K OK on 1.6:: Imsx sane Ismn mm m , 5V
ACvulagesmeasuredalmflohmspervah. n le I '
2. Sockelcanneclmns are mm as mum News, VA 7qu IEDK mm 00 W In NC I5mn NC vmn 11mm 43 50W
3 Meaquefl vaLueS are mm mm pln To mmmon negative. 530K I @a II. mm
6, LINE vonage maimaIneD 31111 vulIs lbrvonaqe Tunings. vs 7180 EM Im on an In No mum NC mm LDCLITNNELFDCgcANNEL A
5. NDminalInleunw oImmpDneMI/aluesmakes wssiDIe a my
variafiun mam" mIIage and vesIsIance readings. VA 12500 IZZUK 12mm 25Wu 24 7 347K 47K 1500 13" mum BALANCE coHTRDLs
5. AN cunLrnls at mmimum, wwcrompm luau canneded. @ Au IRAS R8)
v7 mm '1st 1.5mm; Lawn nan San my Mum won We
v5 EcEDIT vInsK 175K wax on HDSK Esau mun 2.me ? NEON [AMPS ?
v9 7sz 130K 180K an no No man No mono
vm 113v IMK 180K an 00 In M man No Imn
9 SEE um usr FOR ALYERNATE
mus DR mummu V :3; MC , NC m NC m "c l
C 'L "5'55 w W E M 1 THIS READINGWILLVARV DEPENDING uPoNTHE CONDITION DFTHE ELEchoLvTIc INTHEcINcuIT.
NOY SNowN oN SCNEMATIC DIAGRAM ' MEASUREDFRDMPINNWIL
AKROWS 0N CONTROLS |NDICATE CLOCKWISK RoIAfloN NC NO coNNEcTInN

(CoNIRDL vuswzn [ROM SHAFT :an

A FHOYOFAU SIANDARD NOTATION scHEMATIc

eI-Imm w 5m 1. Ca., I»; my

H. H. SCOTT
MODEL 299

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