Scott Radio Labs., Inc. 500 Schematic

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Model:500
Manufacturer:Scott Radio Labs., Inc.

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Page 1:

SCOTT PAGE 19-1
scoTT RADIO LABS., INC. MODEL 500'

Model 500 Radio-Phonograph is a console combination designed for opera-
tion on the AM and the FM broadcast bands and for record reproduction
with standard 78 rpm and LP 55 1/5 rpm records. The radio receiver is
comprised of two units; a tuner for AM and FM with all controls, and a
power unit containing the transformer and rectifying circuits as well
as the final audio amplifying circuits. The record player will operat
with intermixed lO and 12 inch records on 78 rpm and will play the new
LP, or 35 1/5 rpm records singly using a special pickup provided. A 12
inch diameter, permanent magnet, dynamic speaker is used in a special
acoustic compartment. The record changer compartment is lined with
sound absorbing material to prevent undesirable acoustic resonances.

0

INSTALLATION

The Model 500 is shipped with the tuner (Figure l) and the loudspeaker
installed in the cabinet. The power amplifier (Figure 2) and the rec-
ord changer are shipped in individual cartons. '

To install the power amplifier it is necessary only to remove the unit
from its packing carton, and place it in the compartment at the left

of the speaker housing, as viewed from the rear of the cabinet. Install
the unit with connecting sockets outward, that is, with the power trans
former on the inside. Fasten the unit to the cabinet floor with the
wood screws provided.

To install the record changer remove from packing carton, pull phono
drawer fully forward, and set changer on the mounting board making sure
that the spring mounts on the changer fit securely in the counterbored
holes provided in the mounting panel. While doing this feed the a.c.
cord and the pickup cord through the mounting board, making sure that
they both clear moving parts of the mechanism. Now remove the board
covering the back of the phono compartment. Dress the a.c. cord and
the pickup lead in the clear under the mechanism. Fasten the a.c. cord
at the right of the phono drawer, viewed from the rear of the cabinet.
Then feed the a.c. cord through the right hand hole (the larger one) of
the back board and the pickup lead through the left hand hole, and re-
place phono board. Insert the pickup plug in the socket labeled "PH"
at the right rear of the tuner. Insert the a.c. cord of the phono in
the a.c. receptacle of the power unit, dressing the cord so that it
moves freely when the phono drawer is moved out and in.

Connect the tuner to the power amplifier by means of the outlets pro-
vided. The power pack a.c. cord should be plugged into the tuner re-
ceptacle labeled "Amplifier" (Figure 5).

NOTE: Do not use the tuner receptacle labeled "Phono" for a.c. supply
to the record player. As described above, use the outlet in the
power amplifier as this provides better dressing of the record
player a.c. cord.

a John F. Rider

Page 2:

PAGE 19-2 SCOTT

SCOTT RADIO LABS., INC.

MODEL 500

(C)John F. Rider

Page 3:

SCOTT RADIO LABSUINC,

Amplifier - Top View

Figure 2

Rider

Page 4:

PAGE 19-4 SCOTT
MODEL Soo

SCOTT RADIO LABS, INC.

Rider

Page 5:

_ 4 scoTT PAGE 19-=
SCOTT RADIO LABS., INC. MODEL 500

0

(C)John F. Rider

Page 6:

MODEL SOO

SCOTT RADIO LABSUINCN

Amplifier - Bottom View

Figure 5

Page 7:

Screw

SCOTT RADIO LABSWINC. MODEL 500

SERVICE ADJUSTMENT

Alignment Procedure

Check position of pointer on the dial scale. When the condenser gang is
completely meshed the pointer should be at the last reference mark on
the low frequency end of the dial - just beyond 55. The Volume control
should be fully to the right. The output of the signal generator should
be adjusted only high enough to obtain an output reading. Do not use a
metallic blade screwdriver for adjusting the IF transformers. Use an
insulated blade which will accurately fit the slot in the iron cores.
Care should be taken as it is easy to damage the cores with a poorly
fitting screwdriver. To align see Figures 1, 5 and 4 and proceed as

l. Connect the signal generator to pin #7 (grid) of the 6BE6 through
a .l mf capacitor and adjust the signal generator to 455 kc. Mod-
ulate at 400 cps. Set band switch to AM position, that is, fully
to the left. Set the dial to a point of no interference from lo-
cal broadcasting stations. Connect an a.c. voltmeter across the
audio output (speaker) terminals, and adjust T7 and T5, both top
and bottom, for maximum deflection of the output meter.

2. Connect the signal generator to pin #2 of loop socket through a
220 mmf condenser. Adjust signal generator to 1500 kc and modu-
late at 400 cps. Keep band switch in AM position, that is, fully
to the left. Set the tuner dial to 1500 kc and adjust ClA, ClE
and ClF for maximum deflection of audio output meter.

3. Set signal generator to 600 kc, adjust tuner dial for maximum re-
sponse and then tune Tl and Tll for maximum deflection of audio

output meter.
4. Return signal generator to 1500 kc and repeat operation #2.
5. Return signal generator to 600 kc and repeat operation #5.

6. Connect signal generator to pin #7 of the 6BE6 through a .Ol mf'
coupling condenser. Set generator frequency to 10.7 mc without
modulation. Set the band switch one step to the right and put the
dial at a point of no interference from local FM stations. Con-
nect audio voltmeter to output of diode filter Fl on lower side
of IF transformer T6. Adjust TB, T6 and T4 (top and bottom) for
maximum output deflection.

7. Transfer output voltmeter to output of FM discriminator (across
025) and adjust T9 for zero deflection. Be sure that voltmeter
goes first plus and then minus (reverse voltmeter terminals) and

h set finally at zero.

8. Connect signal generator through a 500 ohm carbon resistor to FM
antenna post and set to 104 mc modulated (FM) 400 cps. Connect
audio voltmeter across output terminals. Adjust ClD, ClC, ClB
and the bottom of T9 for maximum deflection of audio output volt-
meter. This completes the alignment.

o John F. Rider

Page 8:

ImDEL 500 SCOTT RADIO LABS INC.

Dial Cord Drive

FULLY CLOS ED

The correct method of install-
ing the cord of the dial drive
is given in Figure 6.

ygltage Readings

The voltage appearing on all
sockets is given in Table I.
Measurements are taken on the
tuner in both AM and FM

Figure 6 Dial Drive Cord
Installation

RECORD CHANGER OPERATION

The Scott Special two speed record changer (standard 78 rpm and long
playing 55 1/5 rpm) will operate only on a 105-125 volt 60 cycle power

For reproduction of standard 78 rpm records the record changer is put
in operation as follows:

l. Set control on the radio receiver to "PH" position. This is the
knob directly to the left of the large tuning knob.

2. Make sure the LP tone arm is firmly in its rest bracket.

3. With the record changer selector control set at "A" (automatic)
position, turn back the record stabilizing weight on the record
shelf, then load lO or 12 inch records (or a mixed stack if you
desire). Loading should not exceed a 1 1/8 inch stack Of rec-
ords. Now turn the record stabilizing weight over onto the top

4. Set the speed control to the 78 rpm position.

5. Press the "ON" button and the record changer will operate. (The
changer)will shut off automatically after playing the last

6. Adjust the volume control on the radio receiver for the desired
output level and the base and treble controls for desired tone

7. If it is desired to reject a record that is playing, press the
"ON" button all the way down and release it.

8. To play records one at a time set the selector control to the "M"
position; place the record on the turntable and depress the "ON"
button. At the conclusion of the record the changer must be turn-
ed off manually by depressing the "OFF" button.

e John F. Rider

Page 9:

For reproduction of LP (long playing), 55 1/6 rpm records the record
changer is put into operation as follows:

1. Remove any records that may happen to be on the turntable.

2. Remove center spindle, place LP record on turntable, center rec~
ord carefully on turntable and replace spindle.

3. Turn speed control to the 53 1/5 position.

4. Set the selector control to "M" (manual) position.

5. Depress the "ON" button.

6. Remove LP tone arm from its rest bracket and carefully place it
in the starting groove of the record.

7. On completion of the record carefully lift tone arm from record
and place on rest bracket. Actuate "OFF" button by li fting the
standard tone arm and replace, pressing down at the same time in
order to operate the switch.

NOTE: When phono player is not in operation be sure that speed
control is set at the center, or neutral position.

IMPORTANT: The LP record is fragile and the following precautions

SCOTT RADIO LABSQINC. MODEL SOO

The record changer may be stopped at any time while the record is
being played, by pressing the "OFF" button. The pickup arm may
be picked up off the record and returned to the "OFF" position.
NOTE: At all times when the phono player is not in operation be
sure that the speed control is set to the center, or neu-

should be taken.

1. Handle gently to prevent scratching the soft record

2. When placing pickup on record or removing pickup from
record be careful not to damage record grooves by
rough usage.

3. Always replace record in its envelope when not in use
to prevent dust accumulations on the record surface
or physical damage.

4. Keep records at normal room temperature.

5. Be sure that operating instructions are followed care-
fully. If, by incorrect procedure, the standard 78 rpm
pickup should operate, and come to rest on an LP rec-
ord, the record will be permanently damaged.

6. The LP tone arm should never be used on standard rec~
ords or on a home recording. This use will seriously
damage the pickup needle.

c John F.

Rider

Page 10:

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Page 11:

sCoTT RADIO LABS., INC. MODEE"'?66

Table I Voltage Readings

gggglmube Description Pin P?n P?n Pin Pi?n Pj?n P'i7n P?n
TUNER I

v2 GBEG Mixer :2:2 0 O 6-680 $33 3(1); :82; ~

v5 sJe oscillator Egg o o 6.6m: 18:; :iii 122,57 -

v9 6sz Audio o 6.6" 3:3 o 3:21; o :22

POWER AMPLIF IER

V11 6J5 Amplifier 0 6.286 +160 - 0 - O +6.'7

V15 6L6 Amp. Audi 0 O O +560 1- 275 0 - 6 . Zac + 21
V14: 6L6 Amp . Audio O O +360 + 275 O - 6 . 28.6 + 21
V15 BYSG Rectifier O +400 - 3808.6 - 580m: - +400
V16 5Y3G Rectifier 0 +400 - 580m: - 380ac - +400

Line Voltage _ 11'7 V

Dial set at low frequency end of range.

In the tuner readings where two figures are given the top one is the AM
voltage reading; and the bottom figure the FM voltage reading.

@John F. Rider

Page 12:

MODEL 500 SCOTT RADIO LABS., INC.
Table II Parts List By Symbol Designation
Symbol
Desig. Function Description Part No.
C1 V1 AVC filter Capacitor, paper, ,05 MF 15L5466
C2 V1 cathode bypass Capacitor, ceramic, 47 MMF 1562850
CB Vl screen bypass Capacitor, ceramic, 5000 MMF 15L5462
C4 V1 plate filter Capacitor, ceramic, 5000 MMF 15L3462
C5 V1 plate to V3 grid Capacitor, ceramic, 15 MMF l5E1268
coupling 500 V
06 V5 grid coupling FM Capacitor, ceramic, 15 MMF 15E1268
C7 V5 oscillator grid Capacitor, ceramic, 47 MMF 1562850
coupling 500 V
CB V2 AFC plate decoupling Capacitor, ceramic, 5000 MMF 15L5462
09 V2 oscillator plate Capacitor, ceramic, 470 MMF 15P5958
coupling 500 V
ClO BC band oscillator plate Capacitor, ceramic, 47 MMF 1562850
decoupling 500 V
011 ' V2 oscillator grid Capacitor, ceramic, 47 MMF 1562850
coupling 500 V
012 V2 oscillator cathode Capacitor, ceramic, 5000 MMF 15L5462
bypass 400 V
015 V2 AFC plate coupling Capacitor, ceramic, 22 MMF 15P3959
014 V2 AFC grid RF bypass Capacitor, ceramic, 100 MMF 15E1269
015 V2 AFC grid audio bypass Capacitor, paper, .l MF 15H2706
016 RF section-#B bypass Capacitor, ceramic, 5000 MMF 15L5462
017 V5 mixer screen bypass Capacitor, ceramic, 5000 MMF 15L5452
018 V5 plate decoupling Capacitor, ceramic, 5000 MMF 15L5462
019 lst FM-IF coil primary Capacitor, ceramic, 53 MMF 15P5940
tuning 500 V
C20 lst AM-IF coil primary Capacitor, ceramic, 150 MMF 15P5941
tuning soo v
021 lst FM-IF coil secondary Capacitor, ceramic, 55 MMF 15P5940
tuning 500 V
022 lst AM-IF coil secondary Capacitor, ceramic, 105 MMF 15P5942
tuning 500 V
025 RF and mixer AVC bypass Capacitor, paper, .02 MF 15E1001
C24 V4 heater bypass Capacitor, ceramic, 5000 MMF 15L5462
C25 V4 screen bypass Capacitor, ceramic, 5000 MMF 15L3462
C26 V4 plate decoupling Capacitor, ceramic, 5000 MMF 15L5462

?John F. Rider

Page 13:

scoTT new

SCOTT RADIO LABS., INC. MODEL 500
Table II Parts List By Symbol Designation
32:22]; Function Description Part No.
02'7 2nd Fld-IF coil primary Capacitor, ceramic, 55 MMF 15P5940
tuning 500 V
028 2nd AM-IF coil primary Capacitor, ceramic, 150'MMF 15P5941
tuning 500 V
029 2nd FM-IF coil secondary Capacitor, ceramic, 55 MMF" 15P5940
tuning 500 V
050 2nd AM-IF coil secondary Capacitor, ceramic, 105 MMF 15P5942
tuning 500 V
C51 AM audio series resistor Capacitor, ceramic, 2 x
bypass 150 MMF 400 V. See F1
C52A V5 cathode bypass Capacitor, ceramic 5 x 15P5944
B V5 screen bypass 5000 MMF 400 V
C V5 plate decoupling
C55 5rd FM-IF coil primary Capacitor, ceramic, 55 MMF 15P5940
tuning 500 V
054 5rd FM-IF coil secondary Capacitor, ceramic, 55 MMF 15P5940
tuning 500 V
055 lst FM limiter grid Capacitor, ceramic, 4'7 MMF 1502850
decoupling 500 V
056 V6 2nd FM limiter screen Capacitor, ceramic, 5000 MMF 15115462
bypass 400 V
05'7 V6 plate and screen Capacitor, ceramic, 5000 MMF 151.5462
decoupling 400 V
058 V6 plate to V'7 grid Capacitor, ceramic, 22 MMF 15P5959
coupling 500 V
059 V'7 2nd FM limiter screen Capacitor, ceramic, 5000 MMF 15155462
bypass 400 V
C40 V7 plate decoupling Capacitor, ceramic, 5000 MMF 151.5462
041 FM discriminator coil Capacitor, ceramic, 55 MMF 15P5940
primary tuning 500 V
C42 FM discriminator coil Capacitor, ceramic, 55 MMF 15P5940
coupling 500 V
045 FM'discriminator coil Capacitor, ceramic, 55 MMF 15P5940
secondary tuning 500 V
044 FM discriminator output Capacitor, ceramic, 100 MMF 151551269
bypass 500 V
C45 FM de-emphasis network Capacitor, ceramic, 1500 MMF 15L5459
C46 Bass control circuit Capacitor, paper, 5000 MW' 1531002
04V Base control circuit Capacitor, paper, .02 m? 15E1001
C48 Treble control series (?gpacitor, paper, 5000 MMF 15121002
C49 Treble control series Capacitor, paper, .Ol MF 15L54'74
050 V9 1st audio plate Capacitor, paper, .1 MF 15531848
coupling 400 V
051 V9 lst audio screen Capacitor, paper, .25 MF 151.5469
bypass wo V
052 V9 lst audio cathode Capacitor, electrolytic, 15B658
bypass 25 MF 50 V

?John F. Rider

Page 14:

MODEL 500 scoTT RADIO LABS., INC.
Table II Parts List By Symbol Designation
153212221." Function Description Part No.
055 V9 plate decoupling Capacitor, electrolytic, 15P3945
054A +8 filter Capacitor, electrolytic, 15P5946
B +B filter 40 MF' 400 V
0 +B filter 2) MF 500 V
C55 AC line bypass tuner Capacitor, paper, .01 HF 15131050
chassis 600 V
C56 AC line bypass audio Capacitor, paper, 2 x .05 MF 15A11
chassis 600 V
057 +B filter 6L6 plate Capacitor, paper, 4 MF 15B481
supply 600 V
058 +B filter SLG plate Capacitor, electrolytic, 15Al'7
supply 2 x 50 MF 450 V
059A +B filter audio plate Capacitor, electrolytic, 15105010
supply 50 MF 450 V
B +B filter audio plate 50 HF 450 V
supply
0 +B filter audio plate 50 MF 450 V
supply
060 Audio input coupling gggagitor, paper, .05 MF 15E1041
061 V15 cathode bypass Capacitor, electrolytic, 15B'795
062 V15 plate to V14 grid Capacitor, paper, .05 MF 15E1041
coupling 600 V
065 V14 plate to V15 grid Capacitor, paper, .25 MF 15414
coupling 600 V
064 V14 plate to V16 grid Capacitor, paper, .25 MF 15Al4
coupling 600. V
065 V-15-V16 cathode bypass Capacitor, electrolytic, 15B658
C66 Audio input coupling Capacitor, paper, .05 MF 15L5466
F1 AM diode filter Filter, consists of 47 K ohm 2P'5945
resistor bypassed with 2
150 MMF capacitors on
ceramic form
Il Dial lamp Lamp, 6-8 volts .25 A #44 49131091
blue bead
12 Dial lamp Lamp, 6-8 volts .25 A #44 49131091
blue bead
L1 All band antenna coil RF coil 20P594'7
L2 FM band antenna coil RF coil 20P5948
L5 Vl plate choke RF choke, 3.5 uh 1'7P3949
L4 .AM Band RF coil RF coil 20P5950

?John F. Rider

Page 15:

SCOTT PAGE 19-1

scoTT RADIO LABS, INC. " MODEL 500
Table II Parts List ByASymbol Designation
322;? Function Description Part No.
L5 FM band RF coil RF coil 20P5951
L6 Oscillator+B RF choke RF choke, 5.5 uh 17P5949
L7 FM band oscillator coil RF coil 20P5952
LB AM band oscillator coil RF coil 20P3955
L9 +B filter 61.6 plate LF choke 17B492
supply
L10 +B filter audio plate LF choke 178492;
supply
Lll FM folded dipole antenna Antenna 1P5954
L12 AM loop antenna Antenna 1P59$5
R1 V1 cathode bias Resistor, 68 ohm 10% ? W 70E1195
R2 V1 grid return Resistor, 1 meg 20% ? W 7OA65
Ro v1 screen filter Resistor, 22 K ohm 10% l w '70112708
R4 V1 plate filter Resistor, 1000 ohm 10% i W 7OA47
R5 V2 oscillator plate fil- Resistor, 2200 ohm 10% W 70K5025
R6 v2 oscillator grin series Resistor, 6.8 ohmioy? i w voPeese
R7 BC band oscillator coil Resistor, 220 ohm 10% 2 W 70151289
damping
RB V2 oscillator grid return Resistor, 22 K ohm 10 ?- W 70H2708
R9 V2 cathode bias Resistor, 220 ohm 10 P; W 70131289
R10 V2 AFC plate filter Resistor, 6800 ohm 10 l W 70?.'5957
m1 v2 AFC grid series Resistor, 220 ohm 10 ? w '70121239
R12 v2 Arc grid filter Resistor, .1 meg 10% <15 w voAss
R15 V2 LFC grid filter Resistor, .47 meg 10% ? W 70A61
R14 +B bleeder in Am position Resistor, 5000 ohm 10% 10 W 7OD2919
R15 ve FM grid iesk Resistor, 47 K ohm 10% i w '7er4
R16 V5 oscillator grid return Resistor, 22 K ohm 10% W 70112708
R17 V5 screen filter Resistor, 10 K ohm 10% 2 W 70175958
R18 1st FM-JI' primary +B Resistor, 1000 ohm 10% <2; W 7OA47
R19 AVC filter RF Bc mixer 8s Resistor, 2.2 meg 20% 'k W 70A64
1st IF amplifier
R20 V4 cathode >bias Resistor, 68 ohm 10% ? W 7OE1195
R21 V4 screen filter Resistor, 55 K ohm 10 l W 70A6'l
R22 V4 plate filter Resistor, 1000 ohm 10% ? W 7OA47
R23 AM 2nd det. audio filter Resistor, 47 K ohm See Fl
R24 AM 2nd det. audio load Resistor, .47 meg 10 1,5 W 70A61
R25 V5 cathode bias Resistor, 68 ohm 10 iw 701-31195
R26 V5 screen filter Resistor, 55 K ohm 10 1 W 70A67
R27 V5 plate filter Resistor, 1000 ohm 10; ? W 70A47
R28 V6 grid return Resistor, .1 meg 10% W 70A58
R29 AVC filter 1st FM Resistor, 2.2 meg 20% ? W 70A64
limiter
R50 V6 plate load Resistor, 10 K ohm 10% i W 7OA419
R51 v6 screen bleeder Resistor, 22 K ohm 10% w '70112708
R32 V6 screen 8s plate filter Resistor, 22 K ohm 10% 2 w 70?!5959
R55 V7 grid return Resistor, .15 meg 10% 12- W 70131214
R54 v'1 screen b1eeder Resistor, 22 K ohm 10% ?- w '1032708
R55 V7 screen filter Resistor, 22 K ohm 10% 2 W 7OP5959
R56 v'1 p1ate filter Resistor, 1000 ohm 10% e w '70A4'1

.John I. Rider

Page 16:

PAGE 19-16 SCOTT

MODEL 500 SCOTT RADIO LABS., INC.
Table II Parts List By Symbol Designation
Symbol
Deals. Function Description Part No.
R57 FM discriminator audio Resistor, .1 meg 10% % W 70A58
load
R58 FM discriminator audio Resistor, .1 meg 10% t W 7OA58
load
R59 FM audio de-emphasis Resistor, 47 K ohm 10 ? W 70A54
R40 Audio output load Resistor, .l meg 10% w '70158
R41 Bass control limiting Resistor, 22 K ohm 10 ? W 70H2708
R42 Bass control Potentiometer, .5 meg f W 70P5960
R45 Bass control series Resistor, 4'7 K ohm 10% t w '70A54
R44 Treble control Potentiometer, .5 me A w voPseel
R45 V9 screen filter Resistor, .15 meg 10; ; W 70E1214
R46 V9 cathode bias Resistor, 560 ohm 10% ? W 70A46
R47 volume control Potentiometer, .5 meg i W 70P5962
R48 v9 plete load Resistor, 4'1 K ohm 10% t w '70454
R49 +B supply filter tuner Resistor, 22 K ohm 10% l W 70P5965
chassis
R50 +B supply filter tuner Resistor, 700 ohm 10% 10 W 7OP5964
chassis
R51 +B supply filter tuner Resistor, 500 ohm 10% 10 W 7OE1256
chassis
R52 Heater supply center tap Resistor, 270 ohm 10% i W 70E1197
R55 Heater supply center tap Resistor, 270 ohm 10% W .7031197
R54 +B filter 6L6 plate Resistor, 500 ohm 10% 10 W 70B682
supply
R55 +B filter audio supply Resistor, 2000 ohm 10% 10 W 70K5156
R56 +B filter Resistor, 750 ohm 10% 20 W 70B99O
R57 +B bleeder Resistor, 10 K ohm 10 10 W 70B660
R58 V15 grid return Resistor, .22 meg 10 W 70A59
R59 Feedback circuit series Resistor, 560 ohm 10% W 7OA46
R60 V15 cathode series Resistor, 2400 ohm 10 ? W 7OA49
R61 V15 cathode load Resistor, 56 ohm 10% W 70A45
R62 V15 plate load Resistor, 47 K ohm 10 ? W 70A54
Res vl4 grid return Resistor, .22 meg 10% t w 'roses
H64 vl4 cathode series Resistor, 680 ohm 10% ? w voElov'l
nes vl4 eethode load Resistor, 6800 ohm 10% e w '70192va
R66 V14 plate load Resistor, 7500 ohm 10% % W 70E1074
R67 V15 grid return Resistor, 47 K ohm 10 ? W 70A54
R68 V15-V16 cathode bias Resistor, 210 ohm 10 10 W 70D2769
R69 vlo grid return Resistor, 4V K ohm 10% #b w voA54
SWl AM-FM switch Switch, slide, 5 P. D.T. 89P5965
SWZ AM-FM-PH-TV switch Switch, rotary, 2 P. 4 T. 89P5966
T1 1st FM-IF transformer Transformer, IF, 10.7 mo 91P5967
T2 2nd FMAIF transformer Transformer, IF, 10.7 mc 91P5968
T5 5rd FM-IF transformer Transformer, IF, 10.7 mc 91P5969
T4 FM discriminator Transformer, IF, 10.7 mc 91P597O
transformer
T5 Power transformer - tuner Transformer, power 91P5971
chassis

Rider

Page 17:

sCOTT RADIO LA

AUDIO (ABLE

AMP IF ER PLLKS

(C)John F. Rider

Page 18:

SCOTT PAGE 197mm
>TT RADIO LABS., INC. WHEEL 500

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SCOTT PAGE 19~19

MODEL SOO

SCOTT RADIO LABS,INC.

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Rider

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