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  1. Setting Up a Circuit for Testing
  2. 6H6 question
  3. Kennedy Tube Audio Website Hijacked
  4. Yet another 12B4 line stage, or is the 12B4 better than the Grounded Grid.....
  5. transformer for Philips AG9015
  6. Real McTube Help
  7. Where are the 307A / VT225 amps?
  8. Anyone have a single el84 PPP OPT?
  9. Using an old power transformer as a choke?
  10. Convergent Audio Technology SL-1 Scematics
  11. Poinz 6AQ5 Linestage
  12. microphone preamp
  13. Ticking noise, need help.
  14. Humm in my preamp...
  15. Enclosure suggestion/questions
  16. Calculating Tube Parameters +SPICE
  17. Loudspeaker for TUBE DIYer
  18. Tube ID 18R-AL1?
  19. 6l6gc Tube Drive
  20. Need a little help, TT and PC? Amp Kit?
  21. 12ax7 preamp
  22. 308/ecll800 Lorenz
  23. How did you do your Aikido?
  24. Thoughts on this 807 design
  25. Rectifier compatibilty
  26. Tube amp for biamped speaker
  27. 12ae6, 12fk6, 12fm6 diode specs
  28. Any software out there for taking the headache out of composite loadlines?
  29. Driving a single 6L6GC with 12AX7
  30. quick 50c5 to play around with
  31. A question about distortion in SE vs. PP designs:
  32. Need help on first tube amp rebuild -trans problems
  33. HAMMOND 125ESE Transformer WIRING
  34. preamp ps problem
  35. What does everybody really NEED???
  36. Marantz 7C still good today?
  37. Magnavox Chassis #196-55 Resistor Question
  38. 6BL7
  39. altec/peerless mystery amp
  40. 6gk8 triode pentode tube data
  41. Low Current Source
  42. Parallel Single-Ended Questions
  43. Tube power ratings
  44. 6DJ8 or 12xx7 for hybrid amp (Monarchy)
  45. What did I do wrong with LEGACY????
  46. seeking: tube for a SEP parallel feed like an EL84, but with a lower Ra
  47. Tube Tracer
  48. a question of tube behaviour
  49. Which tube? ECC82, 6SN7 or 6SL7
  50. oscillator
  51. The Covi Mark II Circlotron Amp
  52. HT transformers and polarity
  53. Hammond 156C - good Plate choke load??
  54. DIY pre-amp kit vote
  55. 6550 tubes
  56. Is the 6N6P a direct substitute for the 5687?
  57. SE amp using 1619 instead of 45 triode
  58. Akai M-7 Amp Schematics?
  59. asl 845 monos mods
  60. 3 stages... Two Power Supplies
  61. RCA 7094 tetrodes...
  62. KT88 push pull
  63. Tube amp fan?
  64. Ping gerd.....
  65. Need help finding Sovtel EL84M tubes
  66. Min. current draw for choke input?
  67. Passive RIAA with tubes
  68. Oscillation Mystery
  69. unison research P30K schem?
  70. Can I use a 5R4 GY in place of a 5AR4?
  71. Seeking for all Norman H. Crowhurst papers
  72. best way to elevate heater?
  73. Tube Load Line
  74. Homemade Vacuum Tube
  75. beardm70mk2-want less b+
  76. Need help with tube test data - fast
  77. Show me a schema 6Pi3C-E Push-pull
  78. Help about the 6SN7/5692 linestage
  79. Active load output stage
  80. Power supply question
  81. EL34 Triode Mode - G3 where?
  82. Screen grid driver for PL519?
  83. Best replacment for a 6F2
  84. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  85. Pentode to Triode trick.
  86. 6550 making a Popping sound?
  87. Pie-eyed and puzzled...
  88. How about this schematic
  89. tube disorder
  90. PC choke in a preamp ?
  91. selective tone control
  92. time for a laugh
  93. Another New Build Pictures ( G' Amp )
  94. Help finding: 7-pin PCB socket, 90deg horizontal
  95. LC vs. CLC Theory
  96. Input transformer & volume pot
  97. MC34-B Quit working suddenly (newb)
  98. Golden Tube Audio 300B se
  99. Wanted: Pioneer sa-810 schematic
  100. se el34 finally
  101. Tube design question
  102. Marantz 8 clone build
  103. Active RIAA Eq for tubes- Brian Clark's article
  104. pre hums - even unplugged!
  105. Push Pull Preamplifier anybody?
  106. 6AN8 tube question
  107. Distortion in Fisher 800C
  108. 20% versus 43% screen tap
  109. Van der Veen transformers
  110. Want to upgrade Velleman K8020
  111. KT88 Power supply question
  112. TX coupled, pentode linestage
  113. phase splitter question
  114. New preamp project is online
  115. Newbie: Which amps to build?
  116. Which valve, 5842 (417A) or 6H30
  117. How do you punch out your chassis holes?
  118. Help identifying tube tester
  119. paralelled tube
  120. ECC88 at 12 volts
  121. azarus preamplifier schematics
  122. Which valve amp do I keep?
  123. Favorite Driver for 845
  124. Somebody has that magazine?
  125. modify parallel push-pull EL84 to single push-pull
  126. How long it will last?
  127. Hurricane Wilma
  128. Suddenly, no output from Copland CTA-501
  129. 807 Audio Amp Progress Report
  130. Choke induced Hum
  131. Wim's DC EL84 amp
  132. Drivers for a KT88 pair
  133. what do u think of these tubes?
  134. 12BH7 spice 3f4 model
  135. Clone Marantz M7 Line Amp
  136. 6HF5 sweep tube single ended amp
  137. My first DIY
  138. Winding A Interstage Transformer
  139. help building 12ax7/el84 amp
  140. PSE schematic
  141. Using PSU Designer to calculate DC filament supply
  142. Dynaco stereo 70 driver board
  143. Excellent and cheap DIY INTERSTAGE!
  144. Need Advice with Timer Relay Shut Off
  145. standby switch
  146. Purpose of small cap across PSU rails?
  147. 6SL7 + EL34 SE Audio Amp
  148. 6C33 fixed/auto bias ?
  149. Long Tail and Local feedback
  150. I look for EAR 859 pictures.
  151. Designing a simple tube opamp?
  152. Difference between Hammond 200 and 300 series
  153. Ultrapath Cap
  154. where to find 600v 18awg wire??
  155. Suggested power supply B+?
  156. Variable Impedence Mic Preamp
  157. Help me stop my preamp from farting!
  158. The Valhalla power amplifier project
  159. help! EL84's dying
  160. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  161. ASC Polypropylene And Oil Capacitors
  162. pots... log or linear?
  163. Cracking sound through speakers.
  164. EL84-PP - Why just 5W?
  165. Brook12a schematics...
  166. LongTailedPair gain -> how to calculate?
  167. Wiring secondaries of two power trafo's in parallel?
  168. RIAA "Tube Simulations"
  169. Has anyone built this 'Svetlana Six Pack' ?
  170. updated pics of tube project
  171. help 12FV7 datasheet
  172. Why does my oversized preamp trafo gets much too hot?!?!?
  173. 6sn7 pre
  174. 12AY7/6SN7 preamp PSU check
  175. CT design trans application
  176. Shindo schematics?
  177. Octal Hagerman Cornet Experiences
  178. Zenith AM/FM C835 tube Radio schematic
  179. Oh man, my telefunken stoops...
  180. 42 single ended
  181. EL34 Feedback circuit
  182. Spice model for EL86/6CW5
  183. Ditching some High Voltage
  184. Newbie want to build simple tube preamp&psu!need help!
  185. Phono Pre-Design Input
  186. HV Direct Drive tube amp.
  187. A question about Cathodyne/split load/concertina PI's
  188. Kofi Annan in: "Hummin' Trafo Blues"
  189. Rattling Tube
  190. Berning output buffer
  191. Tube PSU Question
  192. JoLida Envoy PreAmp or DIY?
  193. Looking for Audio Note P1SE schematics.
  194. Which SE-ECL82 amp to build?
  195. PSU Help
  196. Help for stabilisator Data
  197. How much ripple on B+ is allowed?
  198. Typical 2A3 hum?
  199. PV10 PS transformer
  200. 300B Filament Voltage Range
  201. Mullard EL34-Authenticity Verification
  202. Philips V30M amplifier
  203. PWM power supply???
  204. Regulated psu for tube preamp
  205. About to start a new project: PP 6CK4s...
  206. Komuro DC 300B crct w/ 50dht?
  207. DIY speaker attenuator?
  208. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  209. Audio meet pics from this past weekend
  210. Audio Note M7 Line Preamp??
  211. PP 7591 amp
  212. Tube op amps
  213. Please tell me how to upgrade Music Angel KT88 amplifier?
  214. Do I want a fan?
  215. 3rd Aikido?
  216. More Questions about A.Wrights PP1C
  217. 7591s flashing on start-up?
  218. first amp build... wiring questions
  219. pentode aikido driver for 300b
  220. Question about single NOS triodes in cascode for fun
  221. oscillating PP EL84 amplifier
  222. 6H30P based cathode-follower schema kindly requested
  223. Cathode follower question
  224. Bunch of old parts, worth anything?
  225. 6922 vs. 6N1P Bass Response
  226. Behringer reaches a new high in tube "transparency"
  227. Input stage tube
  228. Using transformers as choke?
  229. Resistors
  230. melos gk1 preamps anybody?
  231. Looking for a thread...
  232. DG7-32 based oscillograph schematic needed
  233. Try!!! Ef37a + 6c33c
  234. qustion on tube grade wiring
  235. Balanced pre-amp attempt
  236. GRRR.. sanity check on PTx current please
  237. How do you measure ripple on the B+?
  238. Aikido + EL34 Integrated
  239. heater voltage: why ac, and not dc?
  240. Ideas for using one ECL82 in a preamp
  241. Question about 12AU7
  242. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  243. WIMA FKP1 1000V as coupling cap ??
  244. Ping amperex re: Hammond organs
  245. schematic needen variable power supply
  246. Distributed Load/Balanced Bridge Connection
  247. CCS, feedback and grid leak questions.
  248. Vdd
  249. Help with 6GW8/ECL86 tubes??
  250. Best amplifier (recomendations) for Fostex FE108ez?

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