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Amplifier NameTubes amplifier Tubes powersupplySchematics

Acrosound (TO-250 OT)6SL7, 6SN7, 2*6B4 5V4GAMP+PS(18k)
Acrosound (TO-280 OT)6SL7, 2*6L6 5U4GAMP+PS(16k)
Acrosound (TO-290 and TO-300 OT)2*6SN7, 2*6L6/KT66/807 5V4GAMP+PS(32k)
Acrosound (TO-270, TO-310, TO-320 OT)12AX7, 2*6V6/6Y6/EL84 5Y3GTAMP+PS(37k)
Acrosound (TO-330 OT)2*6SN7GT, 4*KT66 5V4GAMP+PS(33k)
Acrosound (TO-330 OT)2*6SN7, 2*EL34/6550/KT88 5V4GAMP+PS(37k)
Acrosound (TO-340 OT)12AX7, 12AU7, 2*KT88/6550 GZ34AMP+PS(41k)
Acrosound (TO-350 OT)2*6SN7, 6SN7GTA, 6SL7, 2*6146 5Y3, 2*5R4GYAMP+PS(36k)
Alan Kimmel (Sound Practices) 2*5751, 2*6HM6, 12BH7, 2*6146A, 2*EL34 NAAMP(39k)
Altec-Lansing 260A2*6AU6, 2*813 5R4GY, 2*3B28AMP+PS(138k)
Altec-Lansing 323C2*6J5, 2*6L6G 5U4GAMP+PS(31k)
Altec-Lansing 436C6BC8, 6CG7, 6AL5 SSAMP+PS(47k)
Altec-Lansing 1567A3*12AX7, 6CG7 SSAMP+PS(49k)
Altec-Lansing 1568A2*6CG7, 2*6CA7/EL34 5U4GBAMP+PS(46k)
Altec-Lansing 1570B12AX7, 6SN7GTB, 2*6W6GT, 2*811A 4*5R4GYAMP+PS(70k)
Altec-Lansing 1570B modified by Greg Lunde2*6SL7, 6BL7, 2*811A 5Y3, 2*5R4GYAMP+PS(73k)
Altec A-333-A6SJ7, 6j5, 2*6L6G 5U4G, OA3/OC2AMP+PS(27k)
Altec-Lansing A-340-A12AY7, 12AU7, 2*6550 5U4GB, OA3AMP+PS(42k)
Ampliton (Fursac, 1980)EF86, ECC81, 2*6550 SSAMP+PS(19k)
AvanticEF86, ECC83, 2*EL34 GZ34AMP(46k), Parts(16k)
Avery Fisher SA-1612AX7, 2*EL84/6BQ5 2*6CA4AMP+PS(96k)
Brimar VA12ECC807, ECC83, 2*EL506 SSAMP+PS(48k), Notes(2k)
Carver Silver 712BY7, 3*12BH7, 15*KT88/6550 SSAMP+PS(117k), Parts1(20k), Parts2(23k)
Columbia Phonograph Company 920, 930, 990UY227, 2*UX245 UX280AMP+PS(53k)
Conrad Johnson MV-75½ 5751, 6CG7, 2*6550A SSAMP+PS(41k)
Curcio ST-70 input/phasesplitter/driver (Glass Audio 1/97)??? NAAMP(21k)
Dyna based EL84 amp12AX7, 2*6BQ5/EL84 NAAMP(9k)
Dynaco MK III6AN8, 2*6550/KT88 GZ34AMP+PS(22k)
Dynaco ST-706199, 2*EL34 GZ34AMP(35k), PS(28k)
Dynakit MK IV7199, 2*EL34 GZ34AMP+PS(16k)
Eico HF202*ECC82, 2*6L6GB 5U4GBAMP+PS(40k)
Eico HF22 and HF35EF86, 6SN7GTB, 2*6L6GB (EL34 for HF35) 5U4GBAMP+PS(44k)
Eico HF50 and HF60EF86, 6SN7GTB, 2*EL34 GZ34AMP+PS(79k)
Eico HF867247, 2*EL84/6BQ5 NAAMP(13k)
Eico HF87½ ECC83, 6SN7GTB, 2*EL34 NAAMP(18k)
Fisher 20A12AX7, 2*EL84/6BQ5 EZ80AMP+PS(19k)
Fisher SA10012AT7/ECC81, 12AU7/ECC82, 2*6L6G 5V4GAMP+PS(28k)
Grommes 215-BA2*6SN7GT, 2*807 5U4GAMP+PS(46k)
Grommes 260A12AU7, 12BH7A, 2*6550/KT88 2*5U4GB, OB2, 6L6GBAMP+PS(42k)
Grommes Precision S-352*6EU7, 6C4, 2*7868 SSAMP+PS(50k)
Harmon-Kardon Ballad A2301½ ECC83, 12AU7, 2*EL84 GZ34AMP+PS(140k)
Harmon-Kardon Citation II3*12BY7A, 2*KT88/6550 SSAMP+PS(36k)
Harmon-Kardon Citation V12BY7A, 6CG7, 2*7581 NAAMP(20k)
Heathkit AA-321½ 6EU7, 2*ECL86 SSAMP+PS(227k)
Heathkit UA-16AN8, 2*EL84 EZ81AMP+PS(35k)
Heath W3-AM2*6SN7, 2*5881 5V4GAMP+PS(38k)
Heath W5M2*12AU7, 2*KT66 5R4AMP+PS(40k)
Heath W6-A12AU7, 12AX7, 12BH7, 2*6550 SSAMP+PS(52k)
Leak Stereo 201½ ECC83, 2*EL84 GZ34AMP+PS(100k)
Leak Stereo 501½ ECC83, 2*EL34/KT66/5881 GZ34AMP+PS(98k)
Leak Stereo 601½ ECC83, 2*EL34/KT66/5881 GZ34AMP+PS(98k)
Leak TL/10EF86, 6SN7, 2*KT64 5Z4AMP+PS(44k)
Leak TL/12EF36, ECC33, 2*KT66 GZ32AMP+PS(28k)
Leak TL/25+EF86, ECC81, 2*EL34/KT66/5881 GZ34/5V4AMP+PS(64k)
Leak TL/50+EF86, ECC81, 2*KT88/6550 GZ34AMP+PS(60k)
Loetsch/Morrison6DJ8, 2*300B NAAMP(8k)
Lowther LL26EF86, 6BJ6, 13D3, 2*EL34 5U4GAMP+PS(37k)
MachMat Liebaard5687, 2C34 SSAMP+PS
Marantz Model 56BH6, 6CG7, 2*6CA7/EL34 GZ34AMP+PS(34k)
Marantz Model 86BH6, 6CG7, 2*6CA7/EL34 SSAMP+PS(60k)
Marantz Model 92*6DJ8, 6CG7, 4*6CA7/EL34 GZ34AMP+PS(77k)
McGohan M102(B)6AU6, 2*6EU7, 2*6BQ5/EL84 SSAMP+PS(39k)
McIntosh MA230 amplifier section½ 12AX7, 12AU7, 2*7891 NAAMP(15k)
Michaelson & Austin TVA1ECC83, ECC81, 2*KT88 SSAMP+PS(34k)
Norman Crownhurst / Radio Electronics / 15W12AX7, 12AU7, 2*EL84 5V4GAMP+PS(17k)
Norman Crownhurst / Radio Electronics / 35W12AX7, 12BH7A, 2*EL34 5U4GTBAMP+PS(18k)
Philips2*EF86, ECC40, 2*EL34 AX50AMP+PS(44k), Parts(27k)
PhilipsEF86, ???, 4*EL6426 SSAMP+PS(20k)
Quad 222*EF86, 2*KT66 GZ32AMP+PS(50k)
Radiotron A5152*6SN7, 2*807 5R4AMP(24k), Text1(48k), Text2(75k), Text3(38k), Text4(27k)
Scott 299B output stage6BL8G, 2*7189 NAAMP(13k)
Strom Carlson "Code" 25 PA amp2*6SJ7, 4*6L6G 2*5U4GAMP+PS(97k)
VTL 50/502*12AT7, 2*5881/6L6GC SSAMP+PS(99k)
Williamson2*6SN7, 2*1614 GZ34Text1(57k), Text2+AMP(92k), Text3(79k)
Unknown, looks very much like Leak TL/12EF36, ECC33, 2*KT66 GZ32AMP+PS(23k)
Unknown6L7, 6C5, 6F5, 2*2A3 5Z3, 6H6AMP+PS(37k)
Unknown2½ 6BQ7A, 2*12B4A, 2*812A NAAMP(26k)
Unknown6J5, 6SN7, 4*6F6 5V4AMP+PS(37k)
Unknown6SL7, 6SN7, 2*6L6 5V4AMP+PS(24k)
Unknown12AU7, 2*6AU6, 2*6V6GT 5Y3AMP+PS(32k)
Unknown2*ECC83/12AX7, 2*6V6 5U4AMP(34k), PS(15k)
Unknown3*ECC83, 2*7189 SSAMP+PS(75k)
Unknown6J7G, 6J5G, 3*6SN7GT, 2*807 5V4G, 2*6X5GT, 83AMP1(29k), AMP2(27k), PS(24k), Parts1(34k), Parts2(18k), Specs1(32k), Specs2(30k)
Unknown6C5, 6SN7, 6N7, 2*807 2*5Z4AMP+PS(39k)
Unknown12AX7, 12AU7, 2*807 5U4, 6V4AMP(33k), PS(53k), Parts(16k)
UnknownECC82, E80CC, 4*EL34 SSAMP+PS(42k)
Unknown2*12AX7, 12AU7, 2*EL84 EZ81AMP+PS(56k)
Unknown6U8A, 2*E34L/(6L6) NAAMP(27k)
Unknown4*6J5, 2*KT66 53KU/(5V4)AMP+PS(25k)
UnknownEF86, ECC81, 2*6550 SSAMP+PS(19k)


SS = Solid-State, AMP = amplifier part, PS = power supply part, NA = not available