Amplifier Schematics

I don't know much about amp circuitry - I don't even know enough to make much sense of these schematics. Consequently, I have not proofread any of them or checked them for accuracy. Many Valco amp don't follow existing schematics and can be considered transitional circuits between different eras, so consider these to be loose guides rather than gospel truth. Because many models are identical between brand names, a Supro link may bring up a Gretsch schematic, for example.


National

Model Year Size Format
1200 1940s 188Kb JPG
1205 1940s 287Kb PDF

1210 (Twin-Tone)

1958 305Kb JPG
1212 Early '50s 238Kb PDF
1215 Early '50s 277Kb PDF

1240T (Aztec)

Late '50s 35Kb PDF

 

National-Dobro

(These amps may say National or Supro on the front, but they also say National Dobro Corp. or N.D.C. on the control panel or speaker.)

Model Year Size Format
Model B 1938 310Kb PDF
Model C   248Kb PDF

Model D

  294Kb PDF
13A-15 1937-1938 603Kb PDF
21 and 31 1939 305Kb PDF
36-6   335Kb PDF
50 1940 304Kb PDF
60 1939 299Kb PDF
75 1943 377Kb PDF
100   302Kb PDF
6107 1935 259Kb PDF

 

Supro

Model Year Notes Size Format
1600X (Supreme) Ca. 1948 Exact model unknown 173Kb PDF
1600X (Supreme) Ca. 1950 Exact model unknown 102Kb PDF
1606 (Super)     35Kb JPG
1610 (Comet) 1947-1948   138Kb JPG
1614 (Spectator) 1950   46Kb JPG
1641     397Kb PDF
1650RT (Royal Reverb) 1962-1963   114 Kb PDF
1696TN (Combo) 1960-1961   136Kb PDF
6420 (Thunderbolt) 1966   49KB PDF
6422TR (Tremo-Verb) 1964-1965 Same as 6522 74Kb PDF
6424 (Dual Tone Tremolo) 1963-1964 Should be 6424T (?) 166Kb PDF
6522 (Tremo-Verb) 1965-1966 Same as 6422TR 74Kb PDF
6606 (Super Six) 1967-1968   430Kb PDF
6611(Bantam?) 1967-1968 Should be 6511 (?) 450Kb PDF
6616 (Trojan) 1967-1968   528Kb PDF
6622 (Corsica) 1967-1968   600Kb PDF
6625 (Taurus) 1967-1968   159Kb PDF
6650 (Royal Reverb) 1967-1968   98Kb PDF
6651 (Big Star) 1967-1968   198Kb PDF
6688 (Galaxy) 1967-1968   154Kb PDF
6698 (Sportsman) 1967-1968   82Kb PDF

 

Airline

Model Year Notes Size Format
9017 1964-1965   101Kb PDF
9052 1968 Head version of 9067 716Kb PDF
9058 1968 Head version of 9063 54Kb PDF
9060 1968   58Kb PDF
9061 1968   75Kb PDF
9062 1968   954Kb PDF
9063 1968 Combo version of 9058 54Kb PDF
9064 1968   63Kb PDF
9067 1968 Combo version of 9052 716Kb PDF

 

Gretsch

Model Year Notes Size Format
6144 (Pre Amp Reverb Unit) 1967-1968   56Kb PDF
6150 (Compact) 1963-1966   35Kb JPG
6150T (Compact Tremolo) 1964-1966 Same as 6151 54Kb PDF
6151 (Compact Tremolo) 1964-1966 Same as 6150T 54Kb PDF
6152 (Compact Tremolo Reverb) 1964-1966   74Kb PDF
6157 (Super Bass) 1964-1966   93Kb PDF
6160 (Chet Atkins) 1962-1966   397Kb PDF
6161 (Dual-Twin) 1962-1966   508Kb PDF
6162 (Dual-Twin With Reverb) 1965-1966   114 Kb PDF
6163 (Chet Atkins) 1967-1968 (?)   136Kb PDF

 

Harmony

(The Harmony 415 is often reported to be a Valco amp, but it definitely is not.)

Model Year Size Format

420

Mid '60s 1.3Mb PDF
430 Mid '60s 897Kb PDF
440 Mid '60s 832Kb PDF

 

Oahu

Model Year Size Format
230K 1941? 36Kb PDF

 

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