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  1. El84/6bq5/ecc83 + Ef86 = Dc Pp
  2. Searching for simple circuit
  3. McIntosh MC60 Screens
  4. Improve this Pilot 240 (EL84/6BQ5)
  5. Eimac 35TG
  6. power supply issues
  7. Which Amperex ECC88 is the best?
  8. laney PA amp questions
  9. Grid battery bias on phono....
  10. EL34 identification
  11. UL vs SE
  12. 6sn7 operating points
  13. HELP! B+ voltage problem/burning power resistor
  14. are these tubes any good ?????
  15. Free Lunch/Monkey/DRD inspired 2A3
  16. E280F Triode mode operating point
  17. EL84 Guitar amp questions (long, sorry)
  18. 2nd Aikido PCB and PSU groupbuy
  19. Newbie question...
  20. Help in getting more gain out of 300B SE
  21. ECC808 what to do
  22. Microphonics When Hot, Raytheon CK5842
  23. MOSCODE hybrid DIY
  24. transformer question
  25. help, my amp humz
  26. Le tube preamp
  27. Ideal operating point of 6sj7
  28. Convert a non-valve amp to a Valve (tube) Amp
  29. Anyone tried the Hammond 1642SE in a BIG SE amp?
  30. MOSFET current source as triode load
  31. C-core transformers
  32. choke and choke
  33. High Voltage Power Supply Caps
  34. suggestions for 300B tubes
  35. Differential input stage
  36. rca conversion
  37. heating
  38. Russian 6N8S/1578
  39. DIY tube amp squeals when turned up
  40. ECL80-Amp from Andreas Kirschner
  41. HSS preamp, anyone care to comment
  42. help me design an input stage for 6b4G PP
  43. Instrument/Microphone Tube Pre-amp
  44. first-time tube DIY project...phono preamp
  45. A question regarding schematics
  46. My first creation
  47. Your opinion on this VCCS heater supply please.
  48. Looking for ORIGINAL GE 6L6GC
  49. Need help - O/T trannies for future project
  50. ECL82 (6BM8) PP Stereo
  51. first DIY amp start up-yowza HELP!
  52. Ronette Info
  53. GE 5687 (5 stars)
  54. vox ac4
  55. Help: Toroid choke for a preamp
  56. Who makes a 1962 Bassman head chassis?
  57. does meter degrade sound ?
  58. Eye Tube (1629) controller help
  59. Scott 99B & 99C Public Auction Find
  60. tube id book
  61. radio , tv station and radar stations still use the best single end class a amplifier
  62. Stupid question?
  63. looking for ideas on a small tube amp stand?
  64. Cascode gain stage info?????
  65. hi gain preamp
  66. Tube flashing
  67. Bogen tube amp with variable Damping Factor
  68. Question re Allen Wright PP-1cs
  69. What is a good Tube tester to get?
  70. High Gain Preamp
  71. SACThailand
  72. You know you're a tube junky when...
  73. 6AU6 to do EF86 duty?
  74. 6Н28Б-В datasheet?
  75. Is single ended Class A better than push-pull?
  76. Is 845 better than 211 tube amplifier?
  77. Cool Fireworks (tubes are tough!)
  78. Big Big hum ???
  79. 5687 filament heater question
  80. Anyone know agood MOSFET drive for RCA 811A Tube?
  81. Who is into musical instrument tube amplification?
  82. buffer stage ECC88 or ECC83?
  83. EL34 Integrated
  84. Solid state HT regulator??
  85. Tubes driving dipole mids
  86. How do I turn an high current signal into a line level signal??
  87. Peer review, UL question
  88. Grundig TK60 - Where is the Line Out ?
  89. 12AX7, EL34 or 6L6 design wanted
  90. RCA to Speakers?
  91. Morgan Jones - Valve books
  92. Any one tried to use subminiature for input tubes?
  93. Tube data for current manufacturers?
  94. Pentode to Triode Switch
  95. fried Heatkit IP-17 power supply
  96. Suggestions for Tube Amplifier
  97. SMPS for 300B heater ?
  98. What does this mean?
  99. heater/cathode query
  100. Bottlehead S.E.X Amp
  101. Old Meets New
  102. 6336-SE modification
  103. 6as7 pre-amp questions.
  104. Help in calculating NFB loop.
  105. ECL86 - quick and dirty
  106. Help! Q? about Ohm load in '59 Bassman RI
  107. preamp tubes change
  108. Parallel PP ECL86
  109. Anyone build a Minimal Reactance PSU?
  110. Transformer hook-up question to 115V AC line
  111. Langevin Schematic Archive
  112. PPP EL84 Amp
  113. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  114. Aikido: Width control
  115. Shielded Input Wire
  116. choke
  117. Multiple Inputs in One Shielded Cable?
  118. Presence control on a SE ?
  119. Question : pentode ccs schematic ?
  120. right capacitor value?
  121. Anybody knows this tube--WE 430C
  122. Transformer substitution help
  123. CFB Issues
  124. Please Suggest: Old Tube Usages
  125. Very powerful push/pull circuit
  126. Project choice for KT88
  127. Tamura F-475 in Parafeed?
  128. Kofi Annan in: "Push and Pull with Me"
  129. Schmitt dephaser
  130. Anyone using Chelmer Valves?
  131. SET w/ 300B Ultrapath + Parafeed Typologies
  132. a question about local feedback
  133. about input transformer
  134. Power transformer selection madness
  135. EF91 Line Stage questions
  136. Sourcing parts for Dynaco PAS rebuild
  137. HH Scott 223 monoblock schematics
  138. info needed on the 7c6 tube
  139. A final question on grounding(yeah right!)
  140. Schematics and Manuals Site Found
  141. Sprague/Cap Color Codes ?
  142. saba console radio working?
  143. Feedback and mu-followers
  144. Hundreds of 6AL5s
  145. Orange/Red Spot on The Anode of Sovtek 6L6GC
  146. Best way to isolate non-isolated RCAs?
  147. Power Resistor Smoking on HF-81
  148. Audio Innovations L-2
  149. first tube project
  150. And now a question about power switch...
  151. 2E24 ultralinear
  152. tube pin numbers
  153. Will This possibly work?
  154. What is the right current for a 300B at 400V and -80V grid bias?
  155. Simple Cap-Coupled CF Advise Needed
  156. tube amp layout reality check
  157. plitron
  158. How long does a 7199 last?
  159. Modding Tube Mixer Into DAW Front End
  160. CAE Cascode Diffamp Front End
  161. recommended resistor wattage
  162. 6.3V Rectifier Tube Lit by 5V
  163. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  164. WE121A, Please critique me
  165. Grommes / Western Electric G5M Tube Mixer Mods
  166. schemes needed
  167. PP to PPP
  168. aikido voltage swing
  169. voltage drop across a CCS...
  170. bogen db20 Schematic
  171. Mullards branded as Telefunkens???
  172. Pentodes; plate resistance; damping...
  173. PP amp has become SE?
  174. anyone mod a NYAL Moscode superIt?
  175. update to phillips sepp otl?
  176. DC filament supply LC or CL
  177. No Bass Control
  178. Unison Research Simply2 or s2schematics
  179. Border Patrol Power Supply
  180. Any leads on repairing a vintage Alamo Capri tube amp? >>
  181. nanocrystalline amorphous OPT
  182. El84 Pp
  183. Preamp, Euridice?
  184. Has anyone built a PS like this?
  185. Tube sockets in Eagle?
  186. E235L tubes
  187. Grid Input Transformers
  188. Aikido Power Supply
  189. ralph power pp amp with 807 ?
  190. fender clone, 6SJ7 vs. 6SN7
  191. tube stores in moscow
  192. 211 and 845
  193. Need help with amp
  194. Altec 1570B
  195. UL to triode
  196. How can I improve this tube amp (see pics)?
  197. klimo merlin preamp sch wanted
  198. CCS question
  199. *****es brew step 2 ... or grid bias ... how to?
  200. Filaments for the Aikido
  201. RE: RC-19 or RC-30
  202. My experience building a DRD d3A/300B amp
  203. TIP50 + LM317 High Voltage Regulator
  204. Any info on old "Cosmos" amp'?
  205. What more do I need to know?
  206. EBAY Find Of The Year Club LOL
  207. Partial feedback DHP SE amp
  208. newbie question
  209. Tube 1616
  210. Class A tube integrated circuit request
  211. Global Feedback Source Point
  212. These look interesting for that SE project
  213. Phillips AG9008 amp - looking for diagram
  214. 3cx3000
  215. EL86 and speakers? 800 Ohm
  216. Looking for CAT SL-1 Schematic
  217. el84 - 807 ?
  218. Low-voltage Tubebuffer by David Lin
  219. changing diodes with 5AR4 tubes
  220. 801 amp PS
  221. what can I do with these tubes?
  222. How to 'fine tune' your amps?
  223. Otl
  224. Rogers E40a schematic?
  225. Peavey Triple X Rewire! Help!
  226. Butler Monad A 100
  227. Using the UTC LS-33 as a Push-Pull output for 2A3's
  228. 2A3 AC filament hum
  229. A question about diodes...
  230. 5R4WGY/A/B , input filter capacitors
  231. attenuator hook up?
  232. best material for mounting tubes sideways
  233. Amp suggestions needed
  234. CC vs EI I mean toroids are out of question
  235. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  236. Inviting Comment on Schematic
  237. SE 2A3 input stage
  238. DIY Tube Amp Questions
  239. Need tube buffer circuit for sub-woofer out
  240. How to connect electrostatic shield of power transformer?
  241. Your favourite filament supply for DHT's?
  242. Quantum Impex
  243. Channel Switching Real McTube?
  244. so who owns a dac5 or m8 phono
  245. OPT at frequency extremes
  246. Parafeed with resistive load
  247. EL34 SE triode mode A class sch wanted
  248. Dumont (where theres smoke theres sound)
  249. HYBRID- Schematic
  250. I have a pair of JBL control 5 speakers, which valve amp design you recommend?

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