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Model 510-147 schematic

Tube amp: (2) 12AX7, 6973, (3) 6EU7, (2) 6L6, 5U4 4 inputs (2 on each channel), Volume, Bass and Treble controls, 3-position Tone switch on each...
$8.00
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Model 510-149 schematic

Tube amp: (3) 6EU7, (3) 6973, 5Y3 4 inputs (Bass and Treble on each channel), Volume and Tone controls, reverb.
$5.00
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Model 510-54 schematic

Tube amp: (3) 12AX7, (2) 6973, 5Y3 3 inputs (1 Treble and 2 normal), Volume and Tone controls, tremolo
$5.00
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Model 510-70 and 71 schematic

Tube amp: (2) 6EU7, (2) 6L6, 5U4 2 inputs, Volume and Tone controls, 3-position Tone switch. 2 spkrs
$5.00
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Model 510-80 schematic

Tube amp: (4) 6EU7, (2) 6L6, 5U4 4 inputs (2 on each channel), Volume, Bass and Treble controls on each channel, 3-position Tone switch on each...
$8.00
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Model 550 schematic

Schematic only
$5.00
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Model 668 Electra Piano & Rock-si-chord

15 pages Covers troubleshooting, tuning, and schematics
$20.00
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Model 720L schematic

Schematics only. 2 pgs. 1st dates from 2/4/77. 2nd has no date but appears to be a slightly later version.
$8.00
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Model J Echo unit schematic

Undated Tubes: (2) 12AX7, 12AT7, EZ80, EL86, EL41
$5.00
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Mole/Hog's Foot schematic

Bass booster
$5.00
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