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Factory Service Manuals
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Howard Radio Schematics - Only $6.95!
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Radio schematics for the models listed below are published service data from vintage sources*. Each schematic is individually digitized in high resolution to provide the clearest possible scan in a downloadable Adobe PDF file. Schematics are usually 1 or 2 pages. The very early schematics may only contain limited information such as tube locations and battery hook-up data. Some files may also contain additional service information. It normally takes up to 24 hours to receive the download instructions via email but please allow 1 - 2 business days.
View the list of schematics available for models below before placing your order.

Howard Radio Schematics
If your model or chassis is not listed below do not place an order for it.
contact me for availability first.


Download Copy Only $6.95
Model/Chassis Number

Howard Models/Chassis Available:
NOTE: Model #s with dashes are same as without dashes. Example: 425-A = 425A
20
25
30
32
35
40
50
52
56
58
59
60
68
118
200
210
211
214
218
220
221
225
240
250
256
259
260
266
268
270
271
275
280
285
300
301
303
304
305
306
307
318
325
368
375
377
395
400
418
425
430
435
436
437
438
440
445
450
460
468
470
474
482
490
495
502
518
525
526
565
568
575
580
585
626
660
665
700
702
718
765
768
780
802
806
808
810
865
868
901
906
920
1626
2402
1 PERM-A-MATIC TUNER
10T
12B
12-B
135 AC
135 DC
14ABC
14ACB
2 PERM-A-MATIC TUNER
210A
240-1
240-2
275C
275-C
275T
300A
301APC
302APC
302R EARLY
302RA EARLY
302RT EARLY
302S
307-4
307TP
307TP-2
308APC
308C
308TT
318D
325D
35A
400A
400-A
400K
400X
420L
425A
425-A
450A
45AHV
45AHV-P
472AC
472-AC
472AF
472-AF
472C
472F
47A
481A
481-A
481B
481-B
481C
481-C
481M
481-M
482A
482-A
4B
4BT
50 SW
508S
518APC
520APC
568R EARLY
568R LATE
568RA EARLY
568RA LATE
57-A
57-AUS
580APC
580C
5B
60 SW
60 AHV
60 AHV-P
650 PRE. AMP
67 C
67 T
670A
68 REV.
6B
6B-A
718- SERIES X
718FM
718-FM 5-6
718FM SERIES
718X
77 LW
77C
77T
7BT
808- BAND SPREAD
808 SERIES X
901A
901-A
901AE
901AH
901AI
901AM
901AP
901-AP
901-AP-A
901M
901W
902A
902-A
906C
906-C
906-M
906S
906-S
906-SB
909M
909-M
909-MR
99 LW
99C
99T
A-12
A-5
A-6
AA25
AVH CH.
AVH-P CH.
AVO CH.
B13
CABLE-NELSON
CC23
CC24
D
D4
D8
E107
E14
E256
E259
E57
E5B
EX DUAL RANGE
EXPLORER
F
F PENTODE
FM-718
G26
GRAND SERIES 1
GRAND SERIES 2
GREEN DIAMOND
H CH. (45'S)
H CH. (47'S)
HA1
HA2
HA3
HA4
HA6 EARLY
HA6 LATE
HA7
HA8
HA9
INTERMEDIATE FREQ.
J-3 COMPACT
K CH.
L CH.
M CH.
M CH. TYPE 1
M901-A
O CH.
PUSH-BUTTON Adaptor
Q
R-9
S-2
S225
S-225
S250
S-250
S256
S259
S260
S-260
S-7
SG A
SG B
SG C
SGT
SN7
T CH.
W EXPLORER
W PWR. AMP.
W TYPE 1
W TYPE 2
X2
X275
X3
X8
Z4

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I stock over 500,000 schematics for hundreds of manufacturers. Each radio schematic is digitized individually and checked to provide the clearest diagram possible from the original printing.

*The data and files offered here are from vintage sources that are no longer published. There is no guarantee of the accuracy of any information offered. It is solely up to the end user to decide that the information and files offered here are accurate and fit for use with their equipment. I am not responsible for any loss or damages that may be incurred from the use of this information.


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