Service manual

Copyright Donald W Thomas, K5ZRQ
14
Tubes
Ref# Description NOTES:
V1
8950 Driver Section
V2
8950 PA Section
V3
8950 PA Section
V4
8950 PA Section
V5
8950 PA Section
Switches, Fuses, Relays, Lamp, Misc
Ref# Description NOTES:
F1
15 Amp
S1
SPST AC POWER Switch
S2
SPDT MODE Switch
S3
DPST RF POWER Switch
S4
SPDT DELAY Switch
S5
DPST PREAMP Switch
K1
3PDT
K2
DPDT Potter Brumfield, 12V, KT11D
K3
DPDT AZ531-09-1
LAMP
# 1815 14V 200Ma, 2.8 Watts, T3.25
SCREW
Top Cover, 8-32 x 1/4” Binder Head 6 each
SCREW
Bottom Cover, 6 each
Inductors, RFC, Transformer
Ref# Description NOTES:
L1
4 uH Filament Choke
L2
17 uH Driver Plate HV Choke
L3
55 uH Driver Plate HV Choke
L4
55 uH PA Cathode Choke
L5
Wire Coil Driver Section, Pi Network
L6
17 uH PA Plate HV Choke
L7
55 uH PA Plate HV Choke
L8
Wire Coil PA Section, Pi Network
L9
30 uH PA Section, Mounted under C49
L10
Preamp Tuning Coil On PCB, Tunes Preamp Input
L11
GRID TUNING Coil Access on back of chassis
RFC 1
47 2W with 4 Turns Metal Strip Driver Section
RFC 2
100 2W with 5 Turns 14ga Wire PA Section
RFC 3
100 2W with 5 Turns 14ga Wire PA Section
RFC 4
100 2W with 5 Turns 14ga Wire PA Section
RFC 5
100 2W with 5 Turns 14ga Wire PA Section
T1
Power Transformer 271-025