VACUUM TUBE PINOUTS - BustedGear

ustedgear.comVACUUM TUBE PINOUT SHEETSINDEXTube Page Tube Page Tube Page Tube Page5AR4 5 6FQ7 30 12DW7 22 7025 225AU4 6 6FV8A 28 12FX5 12 7027A 185BR8 28 6J7 13 12SL7 16 7189 255BS8 23 6K11 35 12SN7 16 7189A 255FV8 28 6L6 10 7199 295U4 6 6N7 15 18GD6A 11 7591A 195V3 6 6Q11 35 35Z5 7 76 35Y3 6 6SC7 21 36AM3 4 7868 335Z3 2 6SJ7 20 50BM8 276SL7 16 50L6 10 ECC81 226AU6 11 6SN7 16 5751 22 ECC82 226BM8 27 6V4 32 5881 10 ECC83 226BQ5 25 6V6 10 6072A 22 ECC832 226BR8A 28 60FX5 12 ECC88 236C4 8 12AT7 22 6201 22 ECL82 276C6 9 12AU6 11 6550 14 EL34 176C10 34 12AU7 22 6679 22 EL84 256CA4 32 12AX7 22 6680 22 EZ80 326CA7 17 12AY7 22 6681 22 EZ81 326CG7 30 12BH7 22 6922 23 GZ34 56CX8 26 12BV7 24 KT66 106DJ8 23 12BY7A 24 KT88 176EU7 31 12DQ7 24 UCL82 27

5Z3FULL-WAVE RECTIFIERPIN DIAGRAM: 4CWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 2INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Filament2 d2 - Plate3 d1 - Plate4 FilamentTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

36AM3HALF-WAVE RECTIFIERPIN DIAGRAM: 5BQWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 4INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 NC2 NC3 Heater4 Heater5 Plate6 Heater Tap7 CathodeTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

5AR4 / GZ34FULL-WAVE RECTIFIERPIN DIAGRAM: 5DAWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 5INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 IC2 Heater4 d2 - Plate6 d1 - Plate8 Heater, CathodeTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

5Y3GT5U4GB5V3A/5AU4FULL-WAVE RECTIFIERPIN DIAGRAM: 5TWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 6INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 NC2 FilamentNC or OMITTED4 d2 - PlateNC or OMITTED6 d1 - PlateNC or OMITTED8 FilamentTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

35Z5GTHALF-WAVE RECTIFIERPIN DIAGRAM: 6ADWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 7INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 NC or OMITTED2 Heater3 Heater Tap - Panel Lamp5 Plate7 Heater8 CathodeTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6C4POWER TRIODEPIN DIAGRAM: 6BGWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 8INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Plate2 IC3 Heater4 Heater5 Plate6 Grid7 CathodeTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6C6SHARP-CUTOFF PENTODEPIN DIAGRAM: 6FWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 9INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Heater2 Plate3 Screen Grid4 Suppressor Grid5 Cathode, IS6 Heatercap Control GridTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6L6, 6L6GC PIN DIAGRAM: 7ACPage 106V6, 6V6GTAWIRING SIDE OF SOCKET IS SHOWNINDEX5881, 50L6KT66AMPLIFIER MAKE:MODEL:BEAM POWER TUBESERIAL NO:VOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 S or NC or OMITTED2 Heater3 Plate4 Screen Grid5 Control Grid7 Heater8 Cathode, Suppressor GridTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

18GD6A12AU66AU6SHARP-CUTOFF PENTODEPIN DIAGRAM: 7BKWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 11INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Control Grid2 Suppressor Grid, IS3 Heater4 Heater5 Plate6 Screen Grid7 CathodeTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

60FX512FX5POWER PENTODEPIN DIAGRAM: 7CVWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 12INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Cathode, Suppressor Grid2 Control Grid3 Heater4 Heater5 Control Grid6 Screen Grid7 PlateTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6J7 PIN DIAGRAM: 7RPage 13WIRING SIDE OF SOCKET IS SHOWNINDEXAMPLIFIER MAKE:MODEL:SHARP-CUTOFF PENTODESERIAL NO:VOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 S or NC2 Heater3 Plate4 Screen Grid5 Suppressor Grid7 Heater8 Cathodecap Control GridTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6550BEAM POWER PENTODEPIN DIAGRAM: 7SWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 14INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Metal Shell2 Heater3 Plate4 Screen Grid5 Control Grid7 Heater8 Cathode, Suppressor GridTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6N7TWIN POWER TRIODEPIN DIAGRAM: 8BWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 15INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 S or NC2 Heater3 t2 - Plate4 t2 - Grid5 t1 - Grid6 t1 - Plate7 Heater8 CathodeTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6SL7, 12SL76SN7, 12SN7TWIN TRIODEPIN DIAGRAM: 8BDWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 16INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 t2 - Grid2 t2 - Plate3 t2 - Cathode4 t1 - Grid5 t1 - Plate6 t1 - Cathode7 Heater8 HeaterTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6CA7 / EL34KT88POWER PENTODEPIN DIAGRAM: 8ETWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 17INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Suppressor Grid2 Heater3 Plate4 Screen Grid5 Control Grid6 NC7 Heater8 CathodeTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

7027ABEAM POWER PENTODEPIN DIAGRAM: 8HYWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 18INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Screen Grid2 Heater3 Plate4 Screen Grid5 Control Grid6 Control Grid7 Heater8 Cathode, Suppressor GridTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

7591APOWER PENTODEPIN DIAGRAM: 8KQWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 19INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:12 Heater3 Plate4 Screen Grid5 Cathode, Suppressor Grid6 Control Grid7 Heater8 Screen GridTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6SJ7SHARP-CUTOFF PENTODEPIN DIAGRAM: 8NWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 20INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Metal Shell2 Heater3 Suppressor Grid4 Control Grid5 Cathode6 Screen Grid7 Heater8 PlateTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6SC7HIGH-MU TWIN TRIODEPIN DIAGRAM: 8SWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 21INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Metal Shell2 t2 - Plate3 t2 - Grid4 t1 - Grid5 t1 - Plate6 Common Cathode7 Heater8 HeaterTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

12AT7/ECC81/6679/6201, 5751 PIN DIAGRAM: 9APage 2212AU7/ECC82/6680, 12BH712AX7/ECC83/6681/702512AY7/6072A, 12DW7/ECC832WIRING SIDE OF SOCKET IS SHOWNINDEXAMPLIFIER MAKE:MODEL:TWIN TRIODESERIAL NO:PIN ELECTRODE a: b: c: d: e: f:1 t2 - Plate2 t2 - Grid3 t2 - Cathode4 t2 - Heater5 t1 - Heater6 t1 - Plate7 t1 - Grid8 t1 - Cathode9 Heater commonTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.comVOLTAGE READINGS

6DJ8/ECC88/6922 PIN DIAGRAM: 9AJPage 235BS8WIRING SIDE OF SOCKET IS SHOWNINDEXAMPLIFIER MAKE:MODEL:MEDIUM-MU TWIN TRIODESERIAL NO:VOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 t2 - Plate2 t2 - Grid3 t2 - Cathode4 t2 - Heater5 t1 - Heater6 t1 - Plate7 t1 - Grid8 t1 - Cathode9 ISTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

12BY7A/12BV7/12DQ7 PIN DIAGRAM: 9BFPage 24WIRING SIDE OF SOCKET IS SHOWNINDEXAMPLIFIER MAKE:MODEL:SHARP-CUTOFF PENTODESERIAL NO:VOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Cathode2 Control Grid3 Suppressor Grid, IS4 Heater5 Heater6 Heater common7 Plate8 Screen Grid9 Suppressor Grid, ISTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6BQ5 / EL84 PIN DIAGRAM: 9CVPage 257189WIRING SIDE OF SOCKET IS SHOWNINDEX7189A - pins 1 & 2 connect; pins 6 & 9 connectAMPLIFIER MAKE:MODEL:POWER PENTODESERIAL NO:VOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 IC2 Control Grid3 Cathode, Suppressor Grid4 Heater5 Heater6 IC7 Plate8 IC9 Screen GridTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6CX8PIN DIAGRAM: 9DXWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:Page 26INDEXMEDIUM-MU TRIODE,SHARP-CUTOFF PENTODEMODEL:SERIAL NO:PIN ELECTRODE a: b: c: d: e: f:1 t - Cathode2 t - Control Grid3 t - Plate4 Heater5 Heater6 p - Cathode, Supp Grid, IS7 p - Control Grid8 p - Screen Grid9 p - Platewww.bustedgear.comVOLTAGE READINGSTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etc

6BM8/ECL8250BM8/UCL82PIN DIAGRAM: 9EXWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:Page 27INDEXHIGH-MU TRIODE,POWER PENTODEMODEL:SERIAL NO:PIN ELECTRODE a: b: c: d: e: f:1 t - Grid2 p - Cathode, Supp Grid, IS3 p - Control Grid4 Heater5 Heater6 p - Plate7 p - Screen Grid8 t - Cathode9 t - Platewww.bustedgear.comVOLTAGE READINGSTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etc

6BR8A6FV8A5BR8/5FV8PIN DIAGRAM: 9FAWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:Page 28INDEXMEDIUM-MU TRIODE,SHARP-CUTOFF PENTODEMODEL:SERIAL NO:PIN ELECTRODE a: b: c: d: e: f:1 t - Grid2 t - Plate3 t - Cathode4 Heater5 Heater6 p - Plate7 p - Screen Grid8 p - Cathode, Supp Grid, IS9 p - Control Gridwww.bustedgear.comVOLTAGE READINGSTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etc

7199 PIN DIAGRAM: 9JTWIRING SIDE OF SOCKET IS SHOWNPage 29INDEXAMPLIFIER MAKE:MEDIUM-MU TRIODE,SHARP-CUTOFF PENTODEMODEL:SERIAL NO:PIN ELECTRODE a: b: c: d: e: f:1 t - Plate2 p - Plate3 p - Screen Grid4 Heater5 Heater6 p - Cathode, Supp Grid, IS7 p - Control Grid8 t - Cathode9 t - Gridwww.bustedgear.comVOLTAGE READINGSTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etc

6FQ7 PIN DIAGRAM: 9LPPage 306CG7WIRING SIDE OF SOCKET IS SHOWNINDEXAMPLIFIER MAKE:MODEL:MEDIUM-MU TWIN TRIODESERIAL NO:VOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 t2 - Plate2 t2 - Grid3 t2 - Cathode4 Heater5 Heater6 t1 - Plate7 t1 - Grid8 t1 - Cathode9 NCTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6EU7 PIN DIAGRAM: 9LSPage 31WIRING SIDE OF SOCKET IS SHOWNINDEXAMPLIFIER MAKE:MODEL:TWIN TRIODESERIAL NO:VOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Heater2 Heater3 NC4 t2 - Cathode5 t2 - Grid6 t2 - Plate7 t1 - Plate8 t1 - Grid9 t1 - CathodeTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6CA4 / EZ81 PIN DIAGRAM: 9MPage 326V4 / EZ80WIRING SIDE OF SOCKET IS SHOWNINDEXAMPLIFIER MAKE:MODEL:FULL-WAVE RECTIFIERSERIAL NO:VOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 d1 - Plate2 NC3 Cathode4 Heater5 Heater6 NC7 d2 - Plate8 NC9 NCTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

7868POWER PENTODEPIN DIAGRAM: 9RWWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 33INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Screen Grid2 Control Grid3 Cathode, Suppressor Grid4 Heater5 Heater6 Control Grid7 Screen Grid8 Limited Connection9 PlateTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com

6K11/6Q11THREE-UNIT TRIODEPIN DIAGRAM: 12BYWIRING SIDE OF SOCKET IS SHOWNAMPLIFIER MAKE:MODEL:SERIAL NO:Page 35INDEXVOLTAGE READINGSPIN ELECTRODE a: b: c: d: e: f:1 Heater2 t3 - Plate3 t3 - Cathode4 t1 - Cathode5 t2 - Plate6 t2 - Cathode7 t2 - Grid8 IS9 t1 - Grid10 t1 - Plate11 t3 - Grid12 HeaterTERMINAL ABBREVIATIONS: H = Heater End (Unpolarized). HM = Heater Tap. IC = Do Not Use (Internal Connection). IS = Internal Shield (Electrostatic). K = Cathode. NC = No Internal Connection. S = Metal Shell.SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. hp = Heptode Unit. hx = Hexode Unit. p = Pentode Unit. t = Triode Unit. tr = Tetrode Unit. 1, 2, 3, etc. = No. 1, No. 2, No. 3, etcwww.bustedgear.com