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  1. Using an old power transformer as a choke?
  2. Convergent Audio Technology SL-1 Scematics
  3. Poinz 6AQ5 Linestage
  4. microphone preamp
  5. Ticking noise, need help.
  6. Humm in my preamp...
  7. Enclosure suggestion/questions
  8. Calculating Tube Parameters +SPICE
  9. Loudspeaker for TUBE DIYer
  10. Tube ID 18R-AL1?
  11. 6l6gc Tube Drive
  12. Need a little help, TT and PC? Amp Kit?
  13. 12ax7 preamp
  14. 308/ecll800 Lorenz
  15. How did you do your Aikido?
  16. Thoughts on this 807 design
  17. Rectifier compatibilty
  18. Tube amp for biamped speaker
  19. 12ae6, 12fk6, 12fm6 diode specs
  20. Any software out there for taking the headache out of composite loadlines?
  21. Driving a single 6L6GC with 12AX7
  22. quick 50c5 to play around with
  23. A question about distortion in SE vs. PP designs:
  24. Need help on first tube amp rebuild -trans problems
  25. HAMMOND 125ESE Transformer WIRING
  26. preamp ps problem
  27. What does everybody really NEED???
  28. Marantz 7C still good today?
  29. Magnavox Chassis #196-55 Resistor Question
  30. 6BL7
  31. altec/peerless mystery amp
  32. 6gk8 triode pentode tube data
  33. Low Current Source
  34. Parallel Single-Ended Questions
  35. Tube power ratings
  36. 6DJ8 or 12xx7 for hybrid amp (Monarchy)
  37. What did I do wrong with LEGACY????
  38. seeking: tube for a SEP parallel feed like an EL84, but with a lower Ra
  39. Tube Tracer
  40. a question of tube behaviour
  41. Which tube? ECC82, 6SN7 or 6SL7
  42. oscillator
  43. The Covi Mark II Circlotron Amp
  44. HT transformers and polarity
  45. Hammond 156C - good Plate choke load??
  46. DIY pre-amp kit vote
  47. 6550 tubes
  48. Is the 6N6P a direct substitute for the 5687?
  49. SE amp using 1619 instead of 45 triode
  50. Akai M-7 Amp Schematics?
  51. asl 845 monos mods
  52. 3 stages... Two Power Supplies
  53. RCA 7094 tetrodes...
  54. KT88 push pull
  55. Tube amp fan?
  56. Ping gerd.....
  57. Need help finding Sovtel EL84M tubes
  58. Min. current draw for choke input?
  59. Passive RIAA with tubes
  60. Oscillation Mystery
  61. unison research P30K schem?
  62. Can I use a 5R4 GY in place of a 5AR4?
  63. Seeking for all Norman H. Crowhurst papers
  64. best way to elevate heater?
  65. Tube Load Line
  66. Homemade Vacuum Tube
  67. beardm70mk2-want less b+
  68. Need help with tube test data - fast
  69. Show me a schema 6Pi3C-E Push-pull
  70. Help about the 6SN7/5692 linestage
  71. Active load output stage
  72. Power supply question
  73. EL34 Triode Mode - G3 where?
  74. Screen grid driver for PL519?
  75. Best replacment for a 6F2
  76. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  77. Pentode to Triode trick.
  78. 6550 making a Popping sound?
  79. Pie-eyed and puzzled...
  80. How about this schematic
  81. tube disorder
  82. PC choke in a preamp ?
  83. selective tone control
  84. time for a laugh
  85. Another New Build Pictures ( G' Amp )
  86. Help finding: 7-pin PCB socket, 90deg horizontal
  87. LC vs. CLC Theory
  88. Input transformer & volume pot
  89. MC34-B Quit working suddenly (newb)
  90. Golden Tube Audio 300B se
  91. Wanted: Pioneer sa-810 schematic
  92. se el34 finally
  93. Tube design question
  94. Marantz 8 clone build
  95. Active RIAA Eq for tubes- Brian Clark's article
  96. pre hums - even unplugged!
  97. Push Pull Preamplifier anybody?
  98. 6AN8 tube question
  99. Distortion in Fisher 800C
  100. 20% versus 43% screen tap
  101. Van der Veen transformers
  102. Want to upgrade Velleman K8020
  103. KT88 Power supply question
  104. TX coupled, pentode linestage
  105. phase splitter question
  106. New preamp project is online
  107. Newbie: Which amps to build?
  108. Which valve, 5842 (417A) or 6H30
  109. How do you punch out your chassis holes?
  110. paralelled tube
  111. ECC88 at 12 volts
  112. azarus preamplifier schematics
  113. Which valve amp do I keep?
  114. Favorite Driver for 845
  115. Somebody has that magazine?
  116. modify parallel push-pull EL84 to single push-pull
  117. How long it will last?
  118. Hurricane Wilma
  119. Suddenly, no output from Copland CTA-501
  120. 807 Audio Amp Progress Report
  121. Choke induced Hum
  122. Wim's DC EL84 amp
  123. Drivers for a KT88 pair
  124. what do u think of these tubes?
  125. 12BH7 spice 3f4 model
  126. Clone Marantz M7 Line Amp
  127. 6HF5 sweep tube single ended amp
  128. My first DIY
  129. Winding A Interstage Transformer
  130. help building 12ax7/el84 amp
  131. PSE schematic
  132. Using PSU Designer to calculate DC filament supply
  133. Dynaco stereo 70 driver board
  134. Excellent and cheap DIY INTERSTAGE!
  135. Need Advice with Timer Relay Shut Off
  136. standby switch
  137. Purpose of small cap across PSU rails?
  138. 6SL7 + EL34 SE Audio Amp
  139. 6C33 fixed/auto bias ?
  140. Long Tail and Local feedback
  141. I look for EAR 859 pictures.
  142. Designing a simple tube opamp?
  143. Difference between Hammond 200 and 300 series
  144. Ultrapath Cap
  145. where to find 600v 18awg wire??
  146. Suggested power supply B+?
  147. Variable Impedence Mic Preamp
  148. Help me stop my preamp from farting!
  149. The Valhalla power amplifier project
  150. help! EL84's dying
  151. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  152. ASC Polypropylene And Oil Capacitors
  153. pots... log or linear?
  154. Cracking sound through speakers.
  155. EL84-PP - Why just 5W?
  156. Brook12a schematics...
  157. LongTailedPair gain -> how to calculate?
  158. Wiring secondaries of two power trafo's in parallel?
  159. RIAA "Tube Simulations"
  160. Has anyone built this 'Svetlana Six Pack' ?
  161. updated pics of tube project
  162. help 12FV7 datasheet
  163. Why does my oversized preamp trafo gets much too hot?!?!?
  164. 6sn7 pre
  165. 12AY7/6SN7 preamp PSU check
  166. CT design trans application
  167. Shindo schematics?
  168. Octal Hagerman Cornet Experiences
  169. Zenith AM/FM C835 tube Radio schematic
  170. Oh man, my telefunken stoops...
  171. 42 single ended
  172. EL34 Feedback circuit
  173. Spice model for EL86/6CW5
  174. Ditching some High Voltage
  175. Newbie want to build simple tube preamp&psu!need help!
  176. Phono Pre-Design Input
  177. HV Direct Drive tube amp.
  178. A question about Cathodyne/split load/concertina PI's
  179. Kofi Annan in: "Hummin' Trafo Blues"
  180. Rattling Tube
  181. Berning output buffer
  182. Tube PSU Question
  183. JoLida Envoy PreAmp or DIY?
  184. Looking for Audio Note P1SE schematics.
  185. Which SE-ECL82 amp to build?
  186. PSU Help
  187. Help for stabilisator Data
  188. How much ripple on B+ is allowed?
  189. Typical 2A3 hum?
  190. PV10 PS transformer
  191. 300B Filament Voltage Range
  192. Mullard EL34-Authenticity Verification
  193. Philips V30M amplifier
  194. PWM power supply???
  195. Regulated psu for tube preamp
  196. About to start a new project: PP 6CK4s...
  197. Komuro DC 300B crct w/ 50dht?
  198. DIY speaker attenuator?
  199. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  200. Audio meet pics from this past weekend
  201. Audio Note M7 Line Preamp??
  202. PP 7591 amp
  203. Tube op amps
  204. Please tell me how to upgrade Music Angel KT88 amplifier?
  205. Do I want a fan?
  206. 3rd Aikido?
  207. More Questions about A.Wrights PP1C
  208. 7591s flashing on start-up?
  209. first amp build... wiring questions
  210. pentode aikido driver for 300b
  211. Question about single NOS triodes in cascode for fun
  212. oscillating PP EL84 amplifier
  213. 6H30P based cathode-follower schema kindly requested
  214. Cathode follower question
  215. Bunch of old parts, worth anything?
  216. 6922 vs. 6N1P Bass Response
  217. Behringer reaches a new high in tube "transparency"
  218. Input stage tube
  219. Using transformers as choke?
  220. Resistors
  221. melos gk1 preamps anybody?
  222. Looking for a thread...
  223. DG7-32 based oscillograph schematic needed
  224. Try!!! Ef37a + 6c33c
  225. qustion on tube grade wiring
  226. Balanced pre-amp attempt
  227. GRRR.. sanity check on PTx current please
  228. How do you measure ripple on the B+?
  229. Aikido + EL34 Integrated
  230. heater voltage: why ac, and not dc?
  231. Ideas for using one ECL82 in a preamp
  232. Question about 12AU7
  233. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  234. WIMA FKP1 1000V as coupling cap ??
  235. Ping amperex re: Hammond organs
  236. schematic needen variable power supply
  237. Distributed Load/Balanced Bridge Connection
  238. CCS, feedback and grid leak questions.
  239. Vdd
  240. Help with 6GW8/ECL86 tubes??
  241. Best amplifier (recomendations) for Fostex FE108ez?
  242. Quick valve construction question
  243. Poindexter's 6v6 PP amp
  244. need some help with Ohm's law-fast!
  245. hybrid rectifier question
  246. I really, really wish I hadn't done that...
  247. Quicksilver 8417 conversion
  248. Supratek
  249. remote OPT, stupid idea ?
  250. Autoformer output stage

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