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  1. Improve this Pilot 240 (EL84/6BQ5)
  2. Eimac 35TG
  3. power supply issues
  4. Which Amperex ECC88 is the best?
  5. laney PA amp questions
  6. Grid battery bias on phono....
  7. EL34 identification
  8. Simple 6L6 PP Guitar Design Needed
  9. UL vs SE
  10. 6sn7 operating points
  11. HELP! B+ voltage problem/burning power resistor
  12. E280F Triode mode operating point
  13. are these tubes any good ?????
  14. Free Lunch/Monkey/DRD inspired 2A3
  15. EL84 Guitar amp questions (long, sorry)
  16. 2nd Aikido PCB and PSU groupbuy
  17. Newbie question...
  18. Help in getting more gain out of 300B SE
  19. ECC808 what to do
  20. Microphonics When Hot, Raytheon CK5842
  21. MOSCODE hybrid DIY
  22. transformer question
  23. help, my amp humz
  24. Le tube preamp
  25. Ideal operating point of 6sj7
  26. Convert a non-valve amp to a Valve (tube) Amp
  27. Anyone tried the Hammond 1642SE in a BIG SE amp?
  28. MOSFET current source as triode load
  29. C-core transformers
  30. choke and choke
  31. High Voltage Power Supply Caps
  32. suggestions for 300B tubes
  33. Differential input stage
  34. rca conversion
  35. heating
  36. Russian 6N8S/1578
  37. DIY tube amp squeals when turned up
  38. ECL80-Amp from Andreas Kirschner
  39. HSS preamp, anyone care to comment
  40. help me design an input stage for 6b4G PP
  41. Instrument/Microphone Tube Pre-amp
  42. first-time tube DIY project...phono preamp
  43. A question regarding schematics
  44. My first creation
  45. Your opinion on this VCCS heater supply please.
  46. Looking for ORIGINAL GE 6L6GC
  47. Need help - O/T trannies for future project
  48. ECL82 (6BM8) PP Stereo
  49. first DIY amp start up-yowza HELP!
  50. Ronette Info
  51. GE 5687 (5 stars)
  52. vox ac4
  53. Help: Toroid choke for a preamp
  54. Who makes a 1962 Bassman head chassis?
  55. does meter degrade sound ?
  56. Eye Tube (1629) controller help
  57. Scott 99B & 99C Public Auction Find
  58. tube id book
  59. radio , tv station and radar stations still use the best single end class a amplifier
  60. Stupid question?
  61. looking for ideas on a small tube amp stand?
  62. Cascode gain stage info?????
  63. hi gain preamp
  64. Tube flashing
  65. Bogen tube amp with variable Damping Factor
  66. Question re Allen Wright PP-1cs
  67. What is a good Tube tester to get?
  68. High Gain Preamp
  69. SACThailand
  70. You know you're a tube junky when...
  71. 6AU6 to do EF86 duty?
  72. 6Н28Б-В datasheet?
  73. Is single ended Class A better than push-pull?
  74. Is 845 better than 211 tube amplifier?
  75. Cool Fireworks (tubes are tough!)
  76. Big Big hum ???
  77. 5687 filament heater question
  78. Anyone know agood MOSFET drive for RCA 811A Tube?
  79. Who is into musical instrument tube amplification?
  80. buffer stage ECC88 or ECC83?
  81. EL34 Integrated
  82. Solid state HT regulator??
  83. Tubes driving dipole mids
  84. How do I turn an high current signal into a line level signal??
  85. Peer review, UL question
  86. Grundig TK60 - Where is the Line Out ?
  87. 12AX7, EL34 or 6L6 design wanted
  88. RCA to Speakers?
  89. Morgan Jones - Valve books
  90. Any one tried to use subminiature for input tubes?
  91. Tube data for current manufacturers?
  92. Pentode to Triode Switch
  93. fried Heatkit IP-17 power supply
  94. Suggestions for Tube Amplifier
  95. SMPS for 300B heater ?
  96. What does this mean?
  97. heater/cathode query
  98. Bottlehead S.E.X Amp
  99. Old Meets New
  100. 6336-SE modification
  101. 6as7 pre-amp questions.
  102. Help in calculating NFB loop.
  103. ECL86 - quick and dirty
  104. Help! Q? about Ohm load in '59 Bassman RI
  105. preamp tubes change
  106. Parallel PP ECL86
  107. Anyone build a Minimal Reactance PSU?
  108. Transformer hook-up question to 115V AC line
  109. Langevin Schematic Archive
  110. PPP EL84 Amp
  111. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  112. Aikido: Width control
  113. Shielded Input Wire
  114. choke
  115. Multiple Inputs in One Shielded Cable?
  116. Presence control on a SE ?
  117. Question : pentode ccs schematic ?
  118. right capacitor value?
  119. Anybody knows this tube--WE 430C
  120. Transformer substitution help
  121. CFB Issues
  122. Please Suggest: Old Tube Usages
  123. Very powerful push/pull circuit
  124. Project choice for KT88
  125. Tamura F-475 in Parafeed?
  126. Kofi Annan in: "Push and Pull with Me"
  127. Schmitt dephaser
  128. Anyone using Chelmer Valves?
  129. SET w/ 300B Ultrapath + Parafeed Typologies
  130. a question about local feedback
  131. about input transformer
  132. Power transformer selection madness
  133. EF91 Line Stage questions
  134. Sourcing parts for Dynaco PAS rebuild
  135. HH Scott 223 monoblock schematics
  136. info needed on the 7c6 tube
  137. A final question on grounding(yeah right!)
  138. Schematics and Manuals Site Found
  139. Sprague/Cap Color Codes ?
  140. saba console radio working?
  141. Feedback and mu-followers
  142. Hundreds of 6AL5s
  143. Orange/Red Spot on The Anode of Sovtek 6L6GC
  144. Best way to isolate non-isolated RCAs?
  145. Power Resistor Smoking on HF-81
  146. Audio Innovations L-2
  147. first tube project
  148. And now a question about power switch...
  149. 2E24 ultralinear
  150. tube pin numbers
  151. Will This possibly work?
  152. What is the right current for a 300B at 400V and -80V grid bias?
  153. Simple Cap-Coupled CF Advise Needed
  154. tube amp layout reality check
  155. plitron
  156. How long does a 7199 last?
  157. Modding Tube Mixer Into DAW Front End
  158. CAE Cascode Diffamp Front End
  159. recommended resistor wattage
  160. 6.3V Rectifier Tube Lit by 5V
  161. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  162. WE121A, Please critique me
  163. Grommes / Western Electric G5M Tube Mixer Mods
  164. schemes needed
  165. PP to PPP
  166. aikido voltage swing
  167. voltage drop across a CCS...
  168. bogen db20 Schematic
  169. Mullards branded as Telefunkens???
  170. Pentodes; plate resistance; damping...
  171. PP amp has become SE?
  172. anyone mod a NYAL Moscode superIt?
  173. update to phillips sepp otl?
  174. DC filament supply LC or CL
  175. No Bass Control
  176. Unison Research Simply2 or s2schematics
  177. Border Patrol Power Supply
  178. Any leads on repairing a vintage Alamo Capri tube amp? >>
  179. nanocrystalline amorphous OPT
  180. El84 Pp
  181. Preamp, Euridice?
  182. Has anyone built a PS like this?
  183. Tube sockets in Eagle?
  184. E235L tubes
  185. Grid Input Transformers
  186. Aikido Power Supply
  187. ralph power pp amp with 807 ?
  188. fender clone, 6SJ7 vs. 6SN7
  189. tube stores in moscow
  190. 211 and 845
  191. Need help with amp
  192. Altec 1570B
  193. UL to triode
  194. How can I improve this tube amp (see pics)?
  195. klimo merlin preamp sch wanted
  196. CCS question
  197. *****es brew step 2 ... or grid bias ... how to?
  198. Filaments for the Aikido
  199. RE: RC-19 or RC-30
  200. My experience building a DRD d3A/300B amp
  201. TIP50 + LM317 High Voltage Regulator
  202. Any info on old "Cosmos" amp'?
  203. What more do I need to know?
  204. EBAY Find Of The Year Club LOL
  205. Partial feedback DHP SE amp
  206. newbie question
  207. Tube 1616
  208. Class A tube integrated circuit request
  209. Global Feedback Source Point
  210. These look interesting for that SE project
  211. Phillips AG9008 amp - looking for diagram
  212. 3cx3000
  213. EL86 and speakers? 800 Ohm
  214. Looking for CAT SL-1 Schematic
  215. el84 - 807 ?
  216. Low-voltage Tubebuffer by David Lin
  217. changing diodes with 5AR4 tubes
  218. 801 amp PS
  219. what can I do with these tubes?
  220. How to 'fine tune' your amps?
  221. Otl
  222. Rogers E40a schematic?
  223. Peavey Triple X Rewire! Help!
  224. Butler Monad A 100
  225. Using the UTC LS-33 as a Push-Pull output for 2A3's
  226. 2A3 AC filament hum
  227. A question about diodes...
  228. 5R4WGY/A/B , input filter capacitors
  229. attenuator hook up?
  230. best material for mounting tubes sideways
  231. Amp suggestions needed
  232. CC vs EI … I mean toroids are out of question
  233. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  234. Inviting Comment on Schematic
  235. SE 2A3 input stage
  236. DIY Tube Amp Questions
  237. Need tube buffer circuit for sub-woofer out
  238. How to connect electrostatic shield of power transformer?
  239. Your favourite filament supply for DHT's?
  240. Quantum Impex
  241. Channel Switching Real McTube?
  242. so who owns a dac5 or m8 phono
  243. OPT at frequency extremes
  244. Parafeed with resistive load
  245. EL34 SE triode mode A class sch wanted
  246. Dumont (where theres smoke theres sound)
  247. HYBRID- Schematic
  248. I have a pair of JBL control 5 speakers, which valve amp design you recommend?
  249. sovtek 300B
  250. 12au6 preamp