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  1. UL vs SE
  2. 6sn7 operating points
  3. HELP! B+ voltage problem/burning power resistor
  4. are these tubes any good ?????
  5. Free Lunch/Monkey/DRD inspired 2A3
  6. E280F Triode mode operating point
  7. 2nd Aikido PCB and PSU groupbuy
  8. Newbie question...
  9. Help in getting more gain out of 300B SE
  10. ECC808 what to do
  11. Microphonics When Hot, Raytheon CK5842
  12. MOSCODE hybrid DIY
  13. transformer question
  14. help, my amp humz
  15. Le tube preamp
  16. Ideal operating point of 6sj7
  17. Anyone tried the Hammond 1642SE in a BIG SE amp?
  18. MOSFET current source as triode load
  19. C-core transformers
  20. choke and choke
  21. High Voltage Power Supply Caps
  22. suggestions for 300B tubes
  23. Differential input stage
  24. rca conversion
  25. heating
  26. Russian 6N8S/1578
  27. DIY tube amp squeals when turned up
  28. ECL80-Amp from Andreas Kirschner
  29. HSS preamp, anyone care to comment
  30. help me design an input stage for 6b4G PP
  31. Instrument/Microphone Tube Pre-amp
  32. first-time tube DIY project...phono preamp
  33. A question regarding schematics
  34. My first creation
  35. Your opinion on this VCCS heater supply please.
  36. Looking for ORIGINAL GE 6L6GC
  37. Need help - O/T trannies for future project
  38. ECL82 (6BM8) PP Stereo
  39. first DIY amp start up-yowza HELP!
  40. Ronette Info
  41. GE 5687 (5 stars)
  42. Help: Toroid choke for a preamp
  43. does meter degrade sound ?
  44. Eye Tube (1629) controller help
  45. Scott 99B & 99C Public Auction Find
  46. tube id book
  47. radio , tv station and radar stations still use the best single end class a amplifier
  48. Stupid question?
  49. looking for ideas on a small tube amp stand?
  50. Cascode gain stage info?????
  51. hi gain preamp
  52. Tube flashing
  53. Bogen tube amp with variable Damping Factor
  54. Question re Allen Wright PP-1cs
  55. What is a good Tube tester to get?
  56. High Gain Preamp
  57. SACThailand
  58. You know you're a tube junky when...
  59. 6AU6 to do EF86 duty?
  60. 6Н28Б-В datasheet?
  61. Is single ended Class A better than push-pull?
  62. Is 845 better than 211 tube amplifier?
  63. Cool Fireworks (tubes are tough!)
  64. Big Big hum ???
  65. 5687 filament heater question
  66. Anyone know agood MOSFET drive for RCA 811A Tube?
  67. Who is into musical instrument tube amplification?
  68. buffer stage ECC88 or ECC83?
  69. EL34 Integrated
  70. Solid state HT regulator??
  71. Tubes driving dipole mids
  72. How do I turn an high current signal into a line level signal??
  73. Peer review, UL question
  74. Grundig TK60 - Where is the Line Out ?
  75. 12AX7, EL34 or 6L6 design wanted
  76. RCA to Speakers?
  77. Morgan Jones - Valve books
  78. Any one tried to use subminiature for input tubes?
  79. Tube data for current manufacturers?
  80. Pentode to Triode Switch
  81. fried Heatkit IP-17 power supply
  82. Suggestions for Tube Amplifier
  83. SMPS for 300B heater ?
  84. What does this mean?
  85. heater/cathode query
  86. Bottlehead S.E.X Amp
  87. Old Meets New
  88. 6336-SE modification
  89. 6as7 pre-amp questions.
  90. Help in calculating NFB loop.
  91. ECL86 - quick and dirty
  92. preamp tubes change
  93. Parallel PP ECL86
  94. Anyone build a Minimal Reactance PSU?
  95. Transformer hook-up question to 115V AC line
  96. Langevin Schematic Archive
  97. PPP EL84 Amp
  98. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  99. Aikido: Width control
  100. Shielded Input Wire
  101. choke
  102. Multiple Inputs in One Shielded Cable?
  103. Presence control on a SE ?
  104. Question : pentode ccs schematic ?
  105. right capacitor value?
  106. Anybody knows this tube--WE 430C
  107. Transformer substitution help
  108. CFB Issues
  109. Please Suggest: Old Tube Usages
  110. Very powerful push/pull circuit
  111. Project choice for KT88
  112. Tamura F-475 in Parafeed?
  113. Kofi Annan in: "Push and Pull with Me"
  114. Schmitt dephaser
  115. Anyone using Chelmer Valves?
  116. SET w/ 300B Ultrapath + Parafeed Typologies
  117. a question about local feedback
  118. about input transformer
  119. Power transformer selection madness
  120. EF91 Line Stage questions
  121. Sourcing parts for Dynaco PAS rebuild
  122. HH Scott 223 monoblock schematics
  123. info needed on the 7c6 tube
  124. A final question on grounding(yeah right!)
  125. Schematics and Manuals Site Found
  126. Sprague/Cap Color Codes ?
  127. saba console radio working?
  128. Feedback and mu-followers
  129. Hundreds of 6AL5s
  130. Orange/Red Spot on The Anode of Sovtek 6L6GC
  131. Best way to isolate non-isolated RCAs?
  132. Power Resistor Smoking on HF-81
  133. Audio Innovations L-2
  134. first tube project
  135. And now a question about power switch...
  136. 2E24 ultralinear
  137. tube pin numbers
  138. Will This possibly work?
  139. What is the right current for a 300B at 400V and -80V grid bias?
  140. Simple Cap-Coupled CF Advise Needed
  141. tube amp layout reality check
  142. plitron
  143. How long does a 7199 last?
  144. Modding Tube Mixer Into DAW Front End
  145. CAE Cascode Diffamp Front End
  146. recommended resistor wattage
  147. 6.3V Rectifier Tube Lit by 5V
  148. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  149. WE121A, Please critique me
  150. Grommes / Western Electric G5M Tube Mixer Mods
  151. schemes needed
  152. PP to PPP
  153. aikido voltage swing
  154. voltage drop across a CCS...
  155. bogen db20 Schematic
  156. Mullards branded as Telefunkens???
  157. Pentodes; plate resistance; damping...
  158. PP amp has become SE?
  159. anyone mod a NYAL Moscode superIt?
  160. update to phillips sepp otl?
  161. DC filament supply LC or CL
  162. No Bass Control
  163. Unison Research Simply2 or s2schematics
  164. Border Patrol Power Supply
  165. Any leads on repairing a vintage Alamo Capri tube amp? >>
  166. nanocrystalline amorphous OPT
  167. El84 Pp
  168. Preamp, Euridice?
  169. Has anyone built a PS like this?
  170. Tube sockets in Eagle?
  171. E235L tubes
  172. Grid Input Transformers
  173. Aikido Power Supply
  174. ralph power pp amp with 807 ?
  175. tube stores in moscow
  176. 211 and 845
  177. Need help with amp
  178. Altec 1570B
  179. UL to triode
  180. How can I improve this tube amp (see pics)?
  181. klimo merlin preamp sch wanted
  182. CCS question
  183. *****es brew step 2 ... or grid bias ... how to?
  184. Filaments for the Aikido
  185. RE: RC-19 or RC-30
  186. My experience building a DRD d3A/300B amp
  187. TIP50 + LM317 High Voltage Regulator
  188. Any info on old "Cosmos" amp'?
  189. What more do I need to know?
  190. EBAY Find Of The Year Club LOL
  191. Partial feedback DHP SE amp
  192. newbie question
  193. Tube 1616
  194. Class A tube integrated circuit request
  195. Global Feedback Source Point
  196. These look interesting for that SE project
  197. Phillips AG9008 amp - looking for diagram
  198. 3cx3000
  199. EL86 and speakers? 800 Ohm
  200. Looking for CAT SL-1 Schematic
  201. el84 - 807 ?
  202. Low-voltage Tubebuffer by David Lin
  203. changing diodes with 5AR4 tubes
  204. 801 amp PS
  205. what can I do with these tubes?
  206. How to 'fine tune' your amps?
  207. Otl
  208. Rogers E40a schematic?
  209. Butler Monad A 100
  210. Using the UTC LS-33 as a Push-Pull output for 2A3's
  211. 2A3 AC filament hum
  212. A question about diodes...
  213. 5R4WGY/A/B , input filter capacitors
  214. attenuator hook up?
  215. best material for mounting tubes sideways
  216. Amp suggestions needed
  217. CC vs EI I mean toroids are out of question
  218. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  219. Inviting Comment on Schematic
  220. SE 2A3 input stage
  221. DIY Tube Amp Questions
  222. Need tube buffer circuit for sub-woofer out
  223. How to connect electrostatic shield of power transformer?
  224. Your favourite filament supply for DHT's?
  225. Quantum Impex
  226. Channel Switching Real McTube?
  227. so who owns a dac5 or m8 phono
  228. OPT at frequency extremes
  229. Parafeed with resistive load
  230. EL34 SE triode mode A class sch wanted
  231. Dumont (where theres smoke theres sound)
  232. HYBRID- Schematic
  233. I have a pair of JBL control 5 speakers, which valve amp design you recommend?
  234. sovtek 300B
  235. 12au6 preamp
  236. Engineering Drawings PCB Mount Tube Sockets
  237. Help with a choke for first-time DIY...
  238. Power SRPP
  239. Anode Loading Vs. Cathode Loading ?
  240. Purist 2 Line Amp
  241. Yet Another "EURIDICE" Pre Amp, 4CH This Time
  242. radio receiver
  243. Pioneer SM83 and 500k pot
  244. How many ways to connect a pentode...
  245. How do I go about repairing a vintage Pilotone AA-410A monoblock tube amp?
  246. Any pitfalls to tapping voltage doubler?
  247. 5k to 100 or so line transformers
  248. Ongaku 211 and Supravox 215
  249. Help with 6B4G PP amp.
  250. Help me build my Choke I/P preamp PSU

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