Gibson "Golden Age" Tube Amp Specifications, Tube Configurations and Shipping Information

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  1. Pre-WWII Amplifiers
  2. Early Post-WWII Amplifiers - First Series
  3. Early Post-WWII - Second Series and Addtions
  4. Early Post-WWII - Second Series Additions
  5. 1952-54 The First Les Paul Amps
  6. 1954-61 Two-tone and Tweed Amplifiers I
  7. 1954-61 Two-tone and Tweed Amplifiers II
  8. 1954-61 Two-tone and Tweed Student Amps
  9. 1957 Second Two-tone Series Additions
  10. 1959/60 Tweed Series Additions
  11. 1959-61 Tweed Stereo Amplifiers
  12. 1961 Tweed Reverb Amplifiers
  13. 1962 Crestline Amplifiers
  14. 1962 Crestline Tuck-away Amplifiers
  15. 1962 Crestline Amplifiers with Reverberation
  16. 1963 Crestline Additions
  17. 1963 Power Plus Amplifiers
  18. 1964 Medalist Amplifiers
  19. 1965/66 White Control Panel (Coarse Black Tolex) Amplifiers I
  20. 1965/66 White Control Panel (Coarse Black Tolex) Amplifiers II

Numerous schematics on original site courtesy of Larry Holt, Schematic Heaven.
I have also got a copy of the Gibson Amplifier Master Service Book which includes Epiphone and Kalamazoo tube
and solid state amps up to ca 1969.

Tab. 0. Pre-WWII Amplifiers.
Speaker Inputs
(instr. + mic.) 		Vol.
Control 		Tone
Control 		Ext. Spkr.
Jack 		Tubes Output
Watts
PreampOutputRect.
EH-100* ('36 black leatherette, '37 tan aeroplane cloth/dark ver. stripes, '38-39 brown aeroplane cloth/yellow hor. stripes, '40 natural mahogany finish)
c. 1936-37 10" f.c. 2 No No No 6N72-4280 
c. 1937-3810" f.c. 1+1 Mic only No No 6C8, 6C52-42 or 2-6V680 
c. 1938-39 10" f.c. 2+1 Mic only No No 6F5, 6C5, 6N72-6V6808
c. 1939-40 10" f.c. 2+1 Mic only No No  2-6V6 8
c. 1940-4110" f.c. 2+1 Mic only No No 6C5, 6SQ7, 6N72-6V65Y3 
EH-125 (EH-150 round shouldered style cabinet)
c. 1941-4212" f.c.     2-6SQ7, 6J52-6V65Y3 
c. 194? 12" f.c. 2+1 Mic only No No 6SJ7, 6J52-6V65Y3 
EH-150** ('35-37 square cab., '37-42 round shouldered cab.)
c. 1935-3610" f.c. 2 NoNoNo 6A62-6F680 or 5Z4 
c. 1936-3710" f.c. 2+1 2 SwYes6C5, 6F5, 6N72-6N65Z315
c. 1937-4112" f.c. 2+121 Yes3-6C5, 6F52-6L65Z3 
c. 1941-4212" f.c. 2+121 No 3-6SQ7, 6N72-6L65U4 
EH-185***
c. 194? 2+12Bass, trebleYes3-6J7, 6N72-6L65U4 
c. 1941-42Circuitry identical to 1941-42 EH-150
EH-275 (natural maple finish cabinet)
No details known.
*) AC/DC version was available, sometimes known as EH-110. 6VDC version was also offered.
**) AC/DC version was available, sometimes known as EH-160
(one sample can be found in Aspen Pittman's book, 3-6C5, 4-26B6, 4-25Z5). 6VDC version was also offered.
***) AC/DC version, known as EH-195 was also available

 
Tab. 1. Early Post-WWII Barnes & Reinecke Amplifiers.
1948 BR-6 modifications within parentheses
BR-1 BR-3* BR-4 BR-6/(6F) BR-9
Speaker 12" field-coil 12" field-coil 12" field-coil 10" field-coil
later permanent magnet 		8" field-coil
Inputs
(instr. + mic.)		2+1 2+1 2+1 2 (3) 2
Channels 2 2 2 1 1
Volume Controls2 2 2 1 1
Tone Controls 1 1 1 No No
Ext. Spr. Jack No No No No No
Tubes          
Preamp. 6SJ7, 6SC7 2-7B4, 6J5 6SJ7, 6SL7 6SL7 (6SJ7) 6SN7
Phase splitter6SN7 Transformer 6SN7 6SN7 Transformer
Output 2-6L6 2-6V6 2-6V6 2-6V6 2-6V6
Rect. 5U4 5Z4,
6X5 /w f-c spkr 		5Y3 5Y3 5Y3
Watts Output 18   14 10  
*) Courtesy of Brian Comnes. Schematic through www.soflotubeamps.com..

 
Shipping Totals
Model194619471948194919501951195219531954
BR-1 no data no data 214 109          
BR-3 no data no data              
BR-4 no data no data              
BR-6 no data no data 1197 1213 1345 1026 817 870 702
BR-9     2194 1860 2172 1744 1356 1410 1062

 
Tab. 2. Early Post-WWII Amplifiers - Second Series and Addtions
GA-25 GA-30 GA-50/50T* GA-CB
Speakers 12" & 8" 12" & 8" 12" & 8" 15" coaxial
woofer-tweeter
w/ dividing network
4 sel. switch
Inputs
(instr. + mic.)		3+13+1 3+1 3+1
Channels 1 2 2 2
Volume Controls 1 2 2 2
Tone Controls 1 1 + bass tone exp. sw. Bass, treble Bass, treble
Tremolo No No *Yes Intens., freq.
Tubes        
Preamp. 6SJ7 2-6SJ7 2-6SJ7 or
*3-6SJ7 & 6SL7		3-6SJ7, 2-6SQ7
Phase splitter 2-6J5 6SC7 2-6J5 or
*6SN7 		2-6J5
Output 2-6V6 2-6V6 2-6L6 2-6L6
Rect. 5Y3 5Y3 5V4 5T4
Watts Output 15 14   30-40

 
Shipping Totals (new style in italics)
Model194719481949195019511952195319541955
GA-25 no data                
GA-30   1023 848 750 690 562 515 203 377
GA-50   114 277 233 168 133 92 35 1
GA-50T  39 344 330 352 244 251 142 15
GA-CB     35 26 24 22 1    

 
Tab. 3. Early Post-WWII Amplifiers - Second Series Addtions
GA-75/(75W) GA-20 GA-90 Gibsonette
Speakers 15" 12" 6-8" 10"
Inputs
(instr. + mic.)		4+1 3+12+2*
*hi-gain sw. 		2
Channels 2 2 2 1
Volume Controls2 2 2 1
Tone Controls Bass, treble 11 (early)
Bass, treble
for ea. ch. 		No
Tubes 7 6 8 4
Preamp. 6SJ7, 2-6SC72-6SJ7 2-5879, 12AU7 6SJ7
Phase splitter6SC7 (12AX7) 6SL7 2-6SN7  
Output 2-6L6 2-6V6 2-6L6 (5881) 2-6V6
Rect. 5V4 5Y3 5V4 5Y3
Watts Output 25 12-14 25 8

 
Shipping Totals
Model19501951195219531954195519561957195819591960
GA-75 101 410 338 274 101 23          
GA-20 935 1381 1390 1411 New style
GA-90       65 333 163 164 124 50 45 3
Gibsonette     637 1051 New style

 
Tab. 4. 1952-54 The First Les Paul Amps
GA-40
Les Paul 		GA-5
Les Paul Junior
GA-7? L.P. TV model*
Speaker 12" oval 5"x7"
10"*
Inputs
(instr. + mic.)		3+1 2
Channels 2 1
Volume Controls 2 1
Tone Controls 1 No
Tremolo Speed
3 pos sw.		No
Tubes 8 3
Preamp. 3-6SJ7,
1/2 6SN7 & 6V6 tremolo		6SJ7
Phase splitter 1/2 6SN7  
Output 2-6V6 6V6
Rect. 5V4 5Y3
Watts Output 14 4
*) GA-7? See below. Slightly different graphics on control panel,
"Les Paul TV Model", circuitry otherwise identical to Les Paul Junior Model.

 
Shipping Totals
Model195219531954195519561957
GA-40 329 1774 1158 929 New style
GA-5     1158 2947 New style
GA-7       1 244 224

 
Tab. 5. 1954-61 Two-tone and Tweed Amplifiers I
Tweed model designations in italics
GA-77
Vanguard 		GA-70
Country and Western 		GA-55/55V* GA-45T
Maestro Standard
Speakers 15" 15" 2-12" 4-8"
Inputs 2+2 2+2 2+2 2+2
Channels 2 2 2 2
Volume Controls 2 2 2 2
Tone Controls Bass, treble
Tone, fidelity		Bass, treble, fidelityBass, trebleBass, treble
Tremolo No No *Vibrato Depth, freq.
Tubes 7 c 6 6 9 7
Ext. Spr. Jack No c yes Yes No No
Monitor Jack Yes c no No No No
Watts Output 25 25 18 14-16

GA-77 Vanguard: 12AY7, 12AX7, 12AU7, 2-6L6, 5V4
GA-70: 12AX7, 12AY7, 12AU7, 2-6L6, 5V4
GA-55: 2-12AY7, 6SC7, 2-6L6, 5V4
GA-45 Maestro: 2-5879, 6SQ7, 12AX7, 2-6V6, 5Y3 (essentially a GA-40 with bass and treble tone controls and a different speaker configuration)

Shipping Totals
Model19541955195619571958195919601961
GA-77 147 247 136 112 143 173 160 102
GA-70   1 159 98 74      
GA-55 1 74 51 56 21      
GA-55V 1 188 117 103 64      
GA-45T   281 606 372 296 270 266 70

 
Tab. 6. 1954-61 Two-tone and Tweed Amplifiers II
Tweed model designations in italics
GA-40T
Les Paul 		GA-30
Invader 		GA-20/20T*
Crest/Ranger 		GA-15
Speakers 12" 12" & 8"12" 
Inputs
2+2 2+2 3+1/*2+2 3+1
Channels 2 2 2 2
Volume Controls 2 2 2 2
Tone Controls 1 1 1 1
Tremolo Depth, freq. No *Depth, freq. No
Tubes 7 6 6/*7 5
Ext. Spr. Jack No No No No
Monitor Jack No No No No
Watts Output 14-16 14-16 12-16 14

GA-40 Les Paul: 2-5879, 12AX7, 6SQ7, 2-6V6, 5Y3
GA-30 Invader: 2-12AX7, 12AU7, 2-6V6, 5Y3
GA-20: 4-12AX7, 2-6V6, 5Y3 (correspond to Epiphone EA-25 Century)
GA-20T: 5879, 12AY7, 12AX7, 6SQ7, 2-6V6, 5Y3 (correspond to Epiphone EA-25T Century)
GA-15: 12AX7, 6SL7, 2-6V6, 5Y3

Shipping Totals
Model19541955195619571958195919601961
GA-40 1158 929 957 650 501 615 623 515
GA-30 203 377 243 231 146 148 182 78
GA-20 1092 949 756 462 394 349 174 95
GA-20T     338 717 753 1173 701 542
GA-15   110 57   8      

 
Tab. 7. 1954-61 Two-tone and Tweed Student Amplifiers
Tweed model designations in italics - later additions within parentheses
GA-9 Gibsonette
GA-8/8T
Discoverer 		GA-6
Lancer 		GA-5/5T*
Skylark
Speaker 10" 10" 12" 8"
Inputs 2 2 3+1
2+2		2
Channels 1 1 2 1
Volume Controls 1 1 2 1
Tone Controls No (1) No (1) 1 No
Tremolo No *Yes No *Yes
Tubes 4 4 5 3
Watts Output 8-10 8-9 10-14 4 1/2

GA-9: 6SJ7, 2-6V6, 5Y3
GA-8 Gibsonette: 12AX7, 2-6V6, 5Y3
GA-8T Gibsonette/Discoverer: 12AX7, 2-6BM8, 5Y3
GA-6: 12AY7, 6SL7, 2-6V6, 5Y3
GA-6 Lancer: 2-12AX7, 2-6V6, 5Y3 (identical to GA-14 Titan except for 12" speaker)
GA-5 Skylark: 12AX7, 6V6, 5Y3

Shipping Totals (GA-5 Les Paul Junior model in italics)
Model19541955195619571958195919601961
GA-9 1062 850 991 609 521 286    
GA-8 839 511 442 584 1179 2122 1299 967
GA-8T             1130 1623
GA-6 702 1273 1326 1278 937 1031 518 303
GA-5 1158 2947 2834 3481 3316 5303 3234 2334
GA-5T             123 2094

 
Tab. 8. 1957 Second Two-tone Series Additions
Tweed model designations in italics - Later changes within parentheses
GA-400
Super 400 		GA-200
Rhythm King 		GA-46T
Super Maestro 		GA-85
Speakers 2-12"
twin cone		2-12"
twin cone		2-12"
twin cone		12"
Inputs 2+2+2 2+2 2+2 2+2
Channels 3 2 2 2
Volume Controls 3 2 2 2
Tone Controls
Ea. Channel		Bass, trebleBass, trebleBass, trebleBass, treble
Voicing
Tremolo No No Depth, freq. No
Tubes 12 (11) 11 (10)106
Ext. Spr. Jack Yes Yes Yes Yes
Monitor Jack No No No Yes
Watts Output 60 60 60 25

GA-400 Super-400: 3-12AX7, 12AY7, 2-6BJ8, 2-6SK7, 6V6, 2-6550, GZ34
GA-200 Rhythm King: 2-12AX7, 12AY7, 2-6BJ8, 2-6SK7, 6V6, 2-6550, GZ34
GA-46T: 3-12AX7, 2-5879, 6SN7, 6V6, 2-6550, 5AR4
GA-85: 2-12AX7, 2-5881, 5V6, 5V4

Shipping Totals
Model19571958195919601961
GA-400 15 96 93 112 80
GA-200 22 71 178 265 263
GA-46T 17 69 60 60 53
GA-85 4 56      

 
Tab. 9. 1959/60 Tweed Series Additions
GA-100
Bass 		GA-86
Ensamble 		GA-80
Vari-Tone 		GA-18T
Explorer 		GA-16T
Viscount 		GA-14
Titan
Speaker 12" 12" 15" 10" 10" 10"
Inputs 2 2+2 2+2 3 3 2+2
Channels 1 2 2 1 1 2
Volume Controls 1 2 2 1 1 2
Tone Controls
Ea. Channel		Bass, treble Bass, treble2
6 pre-sel.sw.		111 for
both channels
Tremolo No No No Depth, freq.Depth, freq.No
Tubes 9 7 7 5 5 5
Ext. Spr. Jack Yes Yes No No No No
Monitor Jack No Yes No No No No
Watts Output 35 25 25 14 14 14

GA-100 Bass: 6EU7, 2-6BD6, 2-6FM8, 2-6L6, GZ34, 0A2 (correspond to Epiphone EA-70 Bass-Amp)
GA-86 Ensamble: 2-12AX7, 2-5881, 6V6, GZ34
GA-80 Vari-Tone: 2-12AX7, 2-5879, 2-6L6, GZ34
GA-16T Viscount: 2-12AX7, 2-6V6, 5Y3
GA-14 Titan: 2-12AX7, 2-6V6, 5Y3 (identical to GA-6 Lancer except for 10" speaker, and Epiphone EA-30 Triumph)

Shipping Totals
Model195919601961
GA-100   113 246
GA-86 13 22 7
GA-80 282 181 131
GA-18 1421    
GA-18T   1289 883
GA-16T 1092 949 114
GA-14 1 386 106

 
Tab. 10. 1959-61 Tweed Stereo Amplifiers
Later changes within parentheses
GA-83S
Stereo-Vib 		GA-88S
Stereo-Twin 		GA-87
Stereo Maestro 		GA-79RV*/RVT**
Multi-Purpose 		GA-78RV
Maestro 30
Speakers 4-8" & 12"2-12" 2-12" 2-10" 2-10"
Inputs 2 stereo
2 mono 		2 stereo
2 mono 		2 stereo
2 mono 		2+2 mono
1 stereo 		2+2 mono
1 stereo
Channels 2 2 2 2 2
Volume Controls 2 2 2 2 2
Tone Controls
Ea. Channel		Bass, trebleBass, treble Bass, treble 1 (Bass, treble) Bass, treble
Tremolo Vibrato
depth, freq.		No No **Depth, freq. No
Reverberation No No No *,**Yes Yes
Tubes 13 8 8 8 (9) 8
Diodes   No   (4)  
Ext. Spr. Jack No No No (Yes) No
Monitor Jack No No No No No
Watts Output 2x18 2x18 2x18 2x15 2x15

GA-83S Stereo-Vib: 4-12AX7, 12AU7, 3-6CG7, 4-6BQ5, GZ34
GA-88S Stereo-Twin: 3-12AX7, 4-6BQ5, GZ34
GA-87 Maestro Stereo: 3-12AX7, 4-6BQ5, GZ34
GA-78 & 79: 4-6EU7, 4-6BQ6
GA-79RVT Multi-Purpose: 3-6EU7, 7199, 12AU7, 4-6BQ5
GA-78RV Maestro 30: 3-6EU7, 7199, 12AU7, 4-6BQ5

Shipping Totals
Model195919601961196219631964196519661967
GA-83S 125 128 26            
GA-88S 97 102 37            
GA-87   10 3            
GA-79 163 47              
GA-79RV     409           1
GA-79RVT     203 335 211 160 128 56 39
GA-78RV   101 38            
GA-78RVT     1   3        
GA-78RVS     105            

 
Tab. 11. 1961 Tweed Reverb Amplifiers
GA-1RT
Maestro Reverb-Echo 		GA-2RT
Maestro Deluxe Reverb-Echo 		GA-77RV
Vanguard 		GA-30RV
Invader 		GA-15RV
Maestro 15RV 		GA-19RVT
Speakers 8" 12" 15" 12" & 8" 12"  
Inputs 2 2+2 2+2 2+2 2+2 2
Channels 1 2 2 2 2 1
Volume Controls 1 2 2 2 2 1
Tone Controls
Ea. Channel		No1 Bass, treble
Tone		1 for
both channels
High-low tone exp. sw. 		Bass, treble 1
Tremolo Speed Speed, depthNo No No Speed, depth
Reverberation Yes Yes Yes Yes Yes Yes
Tubes 3 7 6 6 7 7
Ext. Spr. Jack No No No No No No
Monitor Jack No No No No No Yes
Watts Output 8 16 25 16 14-16 14

GA-1RT: 12AX7, 6BM8, 5Y3
GA-1RVT: 6EU7, 7199, 6BM8, 5Y3 (Aka Maestro M-1RVT)
GA-2RT: 4-6EU7, 12AU7, 2-6V6, 5Y3
GA-30RV Invader: 3-6EU7, 12AU7, 2-6V6, 5Y3
GA-15RV: 3-6EU7, 12AU7, 2-6V6, 5Y3
GA-19RVT: 3-6EU7, 7199, 2-6V6, 5Y3

Shipping Totals
Model1961
GA-1RT 2183
GA-2RT 396
GA-77RV 337
GA-30RV 715
GA-15RV 135
GA-19RVT 204
GA-45RV 106

 
Tab. 12. 1962 Crestline Amplifiers
GA-40T
Les Paul 		GA-60
Hercules 		GA-18T
Explorer 		GA-8/8T*
Discoverer 		GA-5/5T*
Skylark
Speaker 12" 15" 12" 12" 10"
Inputs 2+2 2 3 2 2
Channels 2 1 1 1 1
Volume Controls2 1 1 1 1
Tone Controls
Ea. Channel 		1 Bass, trebleBass, trebleBass, trebleNo
Tremolo Depth, freq.No Depth, freq.*Depth, freq.*Freq.
Reverb No No No No No
Ext. Spr. Jack No No No Yes No
Monitor Jack No No Yes Yes No
Tubes 6 5 5 5 5
Diodes 1 3 0 0 0
Watts Output 25 25 15 15 10

GA-40T Les Paul: 3-6EU7, 12AU7, 2-7591, 5AR4
GA-60 Hercules: 2-6EU7, 2-7591, 5AR4 (correspond to Epiphone EA-65 Rivoli)
GA-18T Explorer: 2-6EU7, 2-6BQ5, 6CA4
GA-8 Discoverer: 6EU7, 6C4, 2-6BQ5, 6CA4 (correspond to Epiphone EA-35 Devon)
GA-8T Discoverer: 2-6EU7, 2-6BQ5, 6CA4 (correspond to Epiphone EA-35T Devon)
GA-5 Skylark: 6EU7, 6C4, 2-6AQ5, 6X4 (correspond to Epiphone EA-50 Pacemaker)
GA-5T Skylark: 2-6EU7, 2-6AQ5, 6X4 (correspond to Epiphone EA-50T Pacemaker) Courtesy of Allan Fredrickson.

Shipping Totals (new style in italics)
Model196219631964196519661967
GA-40T413 345 184 29 14 1
GA-60 263 230        
GA-18T690 230        
GA-8 841 188        
GA-8T 1458 1419 1769 1127 6  
GA-5 2431 2306 3540 3669 1528 1009
GA-5T 2249 2463 3499 4353 3521 1006

 
Tab. 13. 1962 Crestline Tuck-away Amplifiers
GA-400
Super 400 		GA-300RVT
Super 300 		GA-200
Rhythm King 		GA-100
Bass Amp
Speakers 2-12" 2-12" 2-12" 15"
Inputs 2+2+2 2+2 2+2 2
Channels 3 2 2 1
Volume Controls 3 2 2 1
Tone Controls
Ea. Channel		Bass, trebleBass, trebleBass, trebleBass, treble
Tremolo No Depth, freq.No No
Reverb No Yes No No
Compression No Yes No No
Ext. Spr. Jack No No No No
Monitor Jack Yes Yes Yes No
Tubes 6 8 6 6
Diodes 8 6 8 3
Watts Output 60 60 60 35

GA-300RVT: 2-6EU7, 3-12AU7, 7199, 2-6L6, 0A2

Shipping Totals
Model19621963
GA-400 89 52
GA-300RVT 220 321
GA-200 267 302
GA-100 227 251

 
Tab. 14. 1962 Crestline Amplifiers with Reverberation
Features added after 1963/64 within parentheses
GA-77RVT/RVTL*
Vanguard 		GA-30RVT
Invader 		GA-19RVT
Falcon
Speakers 15"
*JBL		12" & 10"12"
Inputs 2+2 2+2 2
Channels 2 2 1
Volume Controls2 2 1
Tone Controls
Ea. channel		Bass, treble (mid) 1 (bass, mid, treble)1
Tremolo Depth, freq. Depth, freq. Depth, freq.
Reverb Yes Yes Yes
Stereo No No No
Ext. Spr. Jack No No No
Monitor Jack Yes Yes Yes
Tubes 8 8 (9) 7
Diodes 5 1 (3) 0
Watts Output 50 25 15

GA-77RVT Vanguard: 4-6EU7, 12AU7, 7199, 2-6L6
GA-30RVT Invader: 4-6EU7, 12AU7, 2-7591, 5AR4 (most likely corresponding to Epiphone EA-12RVT Futura)
GA-30RVT Invader: 4-6EU7, 2-12AU7, 2-7591, 0A2
GA-19RVT Falcon: 3-6EU7, 6C4, 2-6V6, 5Y3 (both brown and late black models correspond to Maestro M-216RVT and Epiphone EA-28RVT Pathfinder) Courtesy of Matt Lafferty and Jonathan Horne.
GA-19RVT Falcon: 3-6EU7, 7199, 2-6V6, 5Y3

Shipping Totals
Model196219631964196519661967
GA-77RVT 160 267 321 143 13 15
GA-77RVTL 41 99 106 51 12 1
GA-79RVT 335 211 160 128 56 39
GA-30RVT 193 615 938 840 12 3
GA-19RVT 2362 3761 4363 3212 8 4

 
Tab. 15. 1963 Crestline Additions
GA-77RET/RETL*
Vanguard 		GA-75/75L*
Recording 		GA-25RVT
Hawk 		GA-17RVT
Scout
Speakers 2-10" or
*15" JBL 		2-10" or
*15" JBL 		15"
(2-10") 		10"
Inputs 2+2 2+2 2+2 2
Channels 2 2 2 1
Volume Controls2 2 2 1
Tone Controls
Ea. channel		Bass, mid, trebleBass, trebleBass, trebleNone
Tremolo Depth, freq. No Depth, freq. Freq.
Reverb Yes No Yes Yes
Ext. Spr. JackNo No No No
Monitor Jack Yes Yes Yes No
Tubes 9 6 7 6
Diodes 3 (+2 zener) 3 0 0
Watts Output        

GA-77RET/RETL Vanguard: 3-6EU7, 2-12AU7, 6CG7 (6FQ7), 2-6L6, 0A2
GA-75 Recording: 2-6EU7, 6CG7 (6FQ7), 6C4, 2-6L6
GA-25RVT Hawk (Dated Oct '63 - only one tone-control): 4-6EU7, 12AU7, 2-6V6, 5Y3
GA-25RVT Hawk: 2-6EU7, 3-12AU7 (5814), 2-7591
GA-17RVT Scout: 2-6EU7, 12AX7, 2-6AQ5, 6CA4 (correspond to Epiphone EA-33RVT Galaxie)

Shipping Totals (new style in italics)
Model19631964196519661967
GA-77RET 32 288 73 67 1
GA-77RETL2 107 41 30 1
GA-75 58 91 17 15 1
GA-75L 13 25 16 20 1
GA-25RVT 336 1681 1746 18 1
GA-17RVT 527 2475 2193 1 1

 
Tab. 16. 1963 Power Plus Amplifiers
Titan
I, III, V 		Mercury
I, II 		Atlas
IV
Speakers I 2-12"
III 15" & 2-10"
V 2-15" JBL		I 2-12"
II 15" & 10" 		15"
Inputs 2+2 2+2 2
Channels 2 2 1
Volume Controls2 2 1
Tone Controls
Ea. channel		Bass, mid, treble Bass, mid, treble Bass, treble
Tremolo Depth, freq. Depth, freq. No
Reverb No No No
Tubes 11 7 (8) 5
Diodes 3 5 (3) 5 (3)
Watts Output      

Titan: 3-6EU7, 2-12AU7, 6FQ7, 4-6L6, 0A2 (12AU7 splitter, 6FQ7 driver)
Mercury: 6EU7 splitter, 6FQ7 driver and 2-6L6 output
Titan I, III, V and Medalist: 3-6EU7, 2-12AU7, 6FQ7, 4-6L6, 0A2 (correspond to Epiphone EA-500T)
Mercury I, II and Medalist (slooping sides): 2-6EU7, 6C4 and 1/2-6EU7 tremolo, 1/2-6EU7 splitter, 6FQ7 driver and 2-6L6 output, 0A2
Courtesy of James Black.
Atlas IV and Medalist: 2-6EU7, 6C4, 2-6L6 (correspond to Epiphone EA-71/72 Constellation)

Shipping Totals (new style in italics)
Model19631964196519661967
Titan I 29 172 52   2
Titan III 24 189 67 95 24
Titan V 27 43 42 52 27
Mercury I 118 408 115 2  
Mercury II 55 365 93 150 40
Mercury II L         6
Atlas IV 167 860 271 428 186
Atlas IV L         37

 
Tab. 17. 1964 Medalist Amplifiers
Titan
Medalist 		Mercury
Medalist 		Atlas
Medalist
Speakers 15" & 10"15" & 10"15"
Inputs 2+2 2+2 2
Channels 2 2 1
Volume Controls2 2 1
Tone Controls
Ea. channel 		Bass, mid, treble Bass, mid, treble Bass, treble
Tremolo Depth, freq.Depth, freq.No
Reverb No No No
Tubes 11 8 5
Diodes 3 3 3
Watts Output      

Combo varieties of above Power-Plus amps

Shipping Totals (new style in italics)
Model1964196519661967
Titan Med. 66 51 25 6
Mercury Med. 155 168 3 1
Atlas Med. 297 491 385 155

 
Tab. 18. 1965/66 White control Panel (Coarse Black Tolex) Amplifiers I
GA-77RET/RETL*
Vanguard 		GA-95RVT
Apollo 		GA-55RVT
Ranger 		GA-45RVT
Saturn
Speakers 2-10" or
*15" JBL 		2-12" 4-10" 2-10"
Inputs 2+2 2+2 2+2 2+2
Channels 2 2 2 2
Volume Controls2 2 2 2
Tone Controls
Ea. channel 		Bass, mid, treble Bass, mid, treble Bass, mid, trebleBass, treble
Jazz switch Yes Yes No No
Presence SwitchNo 2 2 2
Tremolo Yes Yes Yes Yes
Reverb Reverb/echo Yes Yes Yes
Ext. Spr. Jack Yes Yes Yes Yes
Monitor Jack Yes No Yes No
Tubes 9 10 9 9
Diodes 5 3 3 3
Watts Output        

GA-77RET Vanguard: 3-6EU7, 2-12AU7, 6CG7 (aka 6FQ7), 2-6L6, 0A2
GA-95RVT Apollo: 2-6EU7, 2-12AU7, 12AX7, 4-6L6, 0A2 (correspond to Epiphone EA-300RVT Embassy)
GA-55RVT Ranger: 4-6EU7, 12AU7, 6CG7 (aka 6FQ7), 2-6L6, 0A2
GA-45RVT Saturn: 4-6EU7, 12AU7, 6CG7 (aka 6FQ7), 2-6L6, 0A2 (correspond to Epiphone EA-14RVT)

Shipping Totals
Model196519661967
GA-77RET 288 73 67
GA-77RETL 107 41 30
GA-95RVT 98 403 247
GA-95RVTL   4 20
GA-55RVT 284 1102 600
GA-55RVTL     101
GA-45RVT 500 1364 660
GA-45RVTL     14

 
Tab. 19. 1965/66 White Control Panel (Coarse Black Tolex) Amplifiers II
GA-35RVT
Lancer 		GA-20RVT
Minuteman 		GA-15RVT
Explorer 		GA-5/5T*
Skylark
Speaker 12" 12" 10" 10"
Inputs 2+2 2+2 3 2
Channels 2 2 1 1
Volume Controls2 2 1 1
Tone Controls
Ea. channel 		Bass, trebleBass, trebleBass, trebleBass, treble
Tremolo Yes Yes Yes No/*Yes
Reverb Yes Yes Yes No
Ext. Spr. Jack Yes No Yes No
Monitor Jack No No No No
Tubes 8 7 5 3/*4
Diodes 3 2 2 2
Watts Output        

GA-35RVT Lancer: 2-6EU7, 12AX7, 2-12AU7, 2-7591, 0A2 (correspond to Epiphone EA-16RVT Regent)
GA-20RVT Minuteman: 3-6EU7, 2-12AU7, 2-6BQ5 (correspond to Epiphone EA-26RVT Electra)
GA-20RVT Minuteman: 2-6EU7, 3-12AU7, 2-6BQ5 (notice that 6EU7 and 12AU7 have different pin-outs)
GA-15RVT Explorer: 2-6EU7, 12AU7, 2-6BQ5 (correspond to Epiphone EA-32RVT Comet)
GA-5 Skylark: 6EU7, 6BQ5, 6X4

Shipping Totals
Model196519661967
GA-35RVT   1736 586
GA-20RVT 1005 3240 1212
GA-15RVT 892 4350 761
GA-5 4353 3521 1006
GA-5T 3669 1528 1009