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  1. reduce before amplifying?
  2. 6AS7-G RCA application considerations
  3. Matisse Fantasy waveform output test
  4. El84/6bq5/ecc83 + Ef86 = Dc Pp
  5. Searching for simple circuit
  6. McIntosh MC60 Screens
  7. Improve this Pilot 240 (EL84/6BQ5)
  8. Eimac 35TG
  9. power supply issues
  10. Which Amperex ECC88 is the best?
  11. laney PA amp questions
  12. Grid battery bias on phono....
  13. EL34 identification
  14. UL vs SE
  15. 6sn7 operating points
  16. HELP! B+ voltage problem/burning power resistor
  17. are these tubes any good ?????
  18. Free Lunch/Monkey/DRD inspired 2A3
  19. E280F Triode mode operating point
  20. EL84 Guitar amp questions (long, sorry)
  21. 2nd Aikido PCB and PSU groupbuy
  22. Newbie question...
  23. Help in getting more gain out of 300B SE
  24. ECC808 what to do
  25. Microphonics When Hot, Raytheon CK5842
  26. MOSCODE hybrid DIY
  27. transformer question
  28. help, my amp humz
  29. Le tube preamp
  30. Ideal operating point of 6sj7
  31. Convert a non-valve amp to a Valve (tube) Amp
  32. Anyone tried the Hammond 1642SE in a BIG SE amp?
  33. MOSFET current source as triode load
  34. C-core transformers
  35. choke and choke
  36. High Voltage Power Supply Caps
  37. suggestions for 300B tubes
  38. Differential input stage
  39. rca conversion
  40. heating
  41. Russian 6N8S/1578
  42. DIY tube amp squeals when turned up
  43. ECL80-Amp from Andreas Kirschner
  44. HSS preamp, anyone care to comment
  45. help me design an input stage for 6b4G PP
  46. Instrument/Microphone Tube Pre-amp
  47. first-time tube DIY project...phono preamp
  48. A question regarding schematics
  49. My first creation
  50. Your opinion on this VCCS heater supply please.
  51. Looking for ORIGINAL GE 6L6GC
  52. Need help - O/T trannies for future project
  53. ECL82 (6BM8) PP Stereo
  54. first DIY amp start up-yowza HELP!
  55. Ronette Info
  56. GE 5687 (5 stars)
  57. vox ac4
  58. Help: Toroid choke for a preamp
  59. Who makes a 1962 Bassman head chassis?
  60. does meter degrade sound ?
  61. Eye Tube (1629) controller help
  62. Scott 99B & 99C Public Auction Find
  63. tube id book
  64. radio , tv station and radar stations still use the best single end class a amplifier
  65. Stupid question?
  66. looking for ideas on a small tube amp stand?
  67. Cascode gain stage info?????
  68. hi gain preamp
  69. Tube flashing
  70. Bogen tube amp with variable Damping Factor
  71. Question re Allen Wright PP-1cs
  72. What is a good Tube tester to get?
  73. High Gain Preamp
  74. SACThailand
  75. You know you're a tube junky when...
  76. 6AU6 to do EF86 duty?
  77. 6Н28Б-В datasheet?
  78. Is single ended Class A better than push-pull?
  79. Is 845 better than 211 tube amplifier?
  80. Cool Fireworks (tubes are tough!)
  81. Big Big hum ???
  82. 5687 filament heater question
  83. Anyone know agood MOSFET drive for RCA 811A Tube?
  84. Who is into musical instrument tube amplification?
  85. buffer stage ECC88 or ECC83?
  86. EL34 Integrated
  87. Solid state HT regulator??
  88. Tubes driving dipole mids
  89. How do I turn an high current signal into a line level signal??
  90. Peer review, UL question
  91. Grundig TK60 - Where is the Line Out ?
  92. 12AX7, EL34 or 6L6 design wanted
  93. RCA to Speakers?
  94. Morgan Jones - Valve books
  95. Any one tried to use subminiature for input tubes?
  96. Tube data for current manufacturers?
  97. Pentode to Triode Switch
  98. fried Heatkit IP-17 power supply
  99. Suggestions for Tube Amplifier
  100. SMPS for 300B heater ?
  101. What does this mean?
  102. heater/cathode query
  103. Bottlehead S.E.X Amp
  104. Old Meets New
  105. 6336-SE modification
  106. 6as7 pre-amp questions.
  107. Help in calculating NFB loop.
  108. ECL86 - quick and dirty
  109. Help! Q? about Ohm load in '59 Bassman RI
  110. preamp tubes change
  111. Parallel PP ECL86
  112. Anyone build a Minimal Reactance PSU?
  113. Transformer hook-up question to 115V AC line
  114. Langevin Schematic Archive
  115. PPP EL84 Amp
  116. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  117. Aikido: Width control
  118. Shielded Input Wire
  119. choke
  120. Multiple Inputs in One Shielded Cable?
  121. Presence control on a SE ?
  122. Question : pentode ccs schematic ?
  123. right capacitor value?
  124. Anybody knows this tube--WE 430C
  125. Transformer substitution help
  126. CFB Issues
  127. Please Suggest: Old Tube Usages
  128. Very powerful push/pull circuit
  129. Project choice for KT88
  130. Tamura F-475 in Parafeed?
  131. Kofi Annan in: "Push and Pull with Me"
  132. Schmitt dephaser
  133. Anyone using Chelmer Valves?
  134. SET w/ 300B Ultrapath + Parafeed Typologies
  135. a question about local feedback
  136. about input transformer
  137. Power transformer selection madness
  138. EF91 Line Stage questions
  139. Sourcing parts for Dynaco PAS rebuild
  140. HH Scott 223 monoblock schematics
  141. info needed on the 7c6 tube
  142. A final question on grounding(yeah right!)
  143. Schematics and Manuals Site Found
  144. Sprague/Cap Color Codes ?
  145. saba console radio working?
  146. Feedback and mu-followers
  147. Hundreds of 6AL5s
  148. Orange/Red Spot on The Anode of Sovtek 6L6GC
  149. Best way to isolate non-isolated RCAs?
  150. Power Resistor Smoking on HF-81
  151. Audio Innovations L-2
  152. first tube project
  153. And now a question about power switch...
  154. 2E24 ultralinear
  155. tube pin numbers
  156. Will This possibly work?
  157. What is the right current for a 300B at 400V and -80V grid bias?
  158. Simple Cap-Coupled CF Advise Needed
  159. tube amp layout reality check
  160. plitron
  161. How long does a 7199 last?
  162. Modding Tube Mixer Into DAW Front End
  163. CAE Cascode Diffamp Front End
  164. recommended resistor wattage
  165. 6.3V Rectifier Tube Lit by 5V
  166. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  167. WE121A, Please critique me
  168. Grommes / Western Electric G5M Tube Mixer Mods
  169. schemes needed
  170. PP to PPP
  171. aikido voltage swing
  172. voltage drop across a CCS...
  173. bogen db20 Schematic
  174. Mullards branded as Telefunkens???
  175. Pentodes; plate resistance; damping...
  176. PP amp has become SE?
  177. anyone mod a NYAL Moscode superIt?
  178. update to phillips sepp otl?
  179. DC filament supply LC or CL
  180. No Bass Control
  181. Unison Research Simply2 or s2schematics
  182. Border Patrol Power Supply
  183. Any leads on repairing a vintage Alamo Capri tube amp? >>
  184. nanocrystalline amorphous OPT
  185. El84 Pp
  186. Preamp, Euridice?
  187. Has anyone built a PS like this?
  188. Tube sockets in Eagle?
  189. E235L tubes
  190. Grid Input Transformers
  191. Aikido Power Supply
  192. ralph power pp amp with 807 ?
  193. fender clone, 6SJ7 vs. 6SN7
  194. tube stores in moscow
  195. 211 and 845
  196. Need help with amp
  197. Altec 1570B
  198. UL to triode
  199. How can I improve this tube amp (see pics)?
  200. klimo merlin preamp sch wanted
  201. CCS question
  202. *****es brew step 2 ... or grid bias ... how to?
  203. Filaments for the Aikido
  204. RE: RC-19 or RC-30
  205. My experience building a DRD d3A/300B amp
  206. TIP50 + LM317 High Voltage Regulator
  207. Any info on old "Cosmos" amp'?
  208. What more do I need to know?
  209. EBAY Find Of The Year Club LOL
  210. Partial feedback DHP SE amp
  211. newbie question
  212. Tube 1616
  213. Class A tube integrated circuit request
  214. Global Feedback Source Point
  215. These look interesting for that SE project
  216. Phillips AG9008 amp - looking for diagram
  217. 3cx3000
  218. EL86 and speakers? 800 Ohm
  219. Looking for CAT SL-1 Schematic
  220. el84 - 807 ?
  221. Low-voltage Tubebuffer by David Lin
  222. changing diodes with 5AR4 tubes
  223. 801 amp PS
  224. what can I do with these tubes?
  225. How to 'fine tune' your amps?
  226. Otl
  227. Rogers E40a schematic?
  228. Peavey Triple X Rewire! Help!
  229. Butler Monad A 100
  230. Using the UTC LS-33 as a Push-Pull output for 2A3's
  231. 2A3 AC filament hum
  232. A question about diodes...
  233. 5R4WGY/A/B , input filter capacitors
  234. attenuator hook up?
  235. best material for mounting tubes sideways
  236. Amp suggestions needed
  237. CC vs EI I mean toroids are out of question
  238. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  239. Inviting Comment on Schematic
  240. SE 2A3 input stage
  241. DIY Tube Amp Questions
  242. Need tube buffer circuit for sub-woofer out
  243. How to connect electrostatic shield of power transformer?
  244. Your favourite filament supply for DHT's?
  245. Quantum Impex
  246. Channel Switching Real McTube?
  247. so who owns a dac5 or m8 phono
  248. OPT at frequency extremes
  249. Parafeed with resistive load
  250. EL34 SE triode mode A class sch wanted

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