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  1. RCA 7094 tetrodes...
  2. KT88 push pull
  3. Tube amp fan?
  4. Ping gerd.....
  5. Need help finding Sovtel EL84M tubes
  6. Min. current draw for choke input?
  7. Passive RIAA with tubes
  8. Oscillation Mystery
  9. unison research P30K schem?
  10. Can I use a 5R4 GY in place of a 5AR4?
  11. Seeking for all Norman H. Crowhurst papers
  12. best way to elevate heater?
  13. Tube Load Line
  14. Homemade Vacuum Tube
  15. beardm70mk2-want less b+
  16. Need help with tube test data - fast
  17. Show me a schema 6Pi3C-E Push-pull
  18. Help about the 6SN7/5692 linestage
  19. Active load output stage
  20. Power supply question
  21. EL34 Triode Mode - G3 where?
  22. Screen grid driver for PL519?
  23. Best replacment for a 6F2
  24. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  25. Pentode to Triode trick.
  26. 6550 making a Popping sound?
  27. Pie-eyed and puzzled...
  28. How about this schematic
  29. tube disorder
  30. PC choke in a preamp ?
  31. selective tone control
  32. time for a laugh
  33. Another New Build Pictures ( G' Amp )
  34. Help finding: 7-pin PCB socket, 90deg horizontal
  35. LC vs. CLC Theory
  36. Input transformer & volume pot
  37. MC34-B Quit working suddenly (newb)
  38. Golden Tube Audio 300B se
  39. Wanted: Pioneer sa-810 schematic
  40. se el34 finally
  41. Tube design question
  42. Marantz 8 clone build
  43. Active RIAA Eq for tubes- Brian Clark's article
  44. pre hums - even unplugged!
  45. Push Pull Preamplifier anybody?
  46. 6AN8 tube question
  47. Distortion in Fisher 800C
  48. 20% versus 43% screen tap
  49. Van der Veen transformers
  50. Want to upgrade Velleman K8020
  51. KT88 Power supply question
  52. TX coupled, pentode linestage
  53. phase splitter question
  54. New preamp project is online
  55. Newbie: Which amps to build?
  56. Which valve, 5842 (417A) or 6H30
  57. How do you punch out your chassis holes?
  58. paralelled tube
  59. ECC88 at 12 volts
  60. azarus preamplifier schematics
  61. Which valve amp do I keep?
  62. Favorite Driver for 845
  63. Somebody has that magazine?
  64. modify parallel push-pull EL84 to single push-pull
  65. How long it will last?
  66. Hurricane Wilma
  67. Suddenly, no output from Copland CTA-501
  68. 807 Audio Amp Progress Report
  69. Choke induced Hum
  70. Wim's DC EL84 amp
  71. Drivers for a KT88 pair
  72. what do u think of these tubes?
  73. 12BH7 spice 3f4 model
  74. Clone Marantz M7 Line Amp
  75. 6HF5 sweep tube single ended amp
  76. My first DIY
  77. Winding A Interstage Transformer
  78. help building 12ax7/el84 amp
  79. PSE schematic
  80. Using PSU Designer to calculate DC filament supply
  81. Dynaco stereo 70 driver board
  82. Excellent and cheap DIY INTERSTAGE!
  83. Need Advice with Timer Relay Shut Off
  84. standby switch
  85. Purpose of small cap across PSU rails?
  86. 6SL7 + EL34 SE Audio Amp
  87. 6C33 fixed/auto bias ?
  88. Long Tail and Local feedback
  89. I look for EAR 859 pictures.
  90. Designing a simple tube opamp?
  91. Difference between Hammond 200 and 300 series
  92. Ultrapath Cap
  93. where to find 600v 18awg wire??
  94. Suggested power supply B+?
  95. Variable Impedence Mic Preamp
  96. Help me stop my preamp from farting!
  97. The Valhalla power amplifier project
  98. help! EL84's dying
  99. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  100. ASC Polypropylene And Oil Capacitors
  101. pots... log or linear?
  102. Cracking sound through speakers.
  103. EL84-PP - Why just 5W?
  104. Brook12a schematics...
  105. LongTailedPair gain -> how to calculate?
  106. Wiring secondaries of two power trafo's in parallel?
  107. RIAA "Tube Simulations"
  108. Has anyone built this 'Svetlana Six Pack' ?
  109. updated pics of tube project
  110. help 12FV7 datasheet
  111. Why does my oversized preamp trafo gets much too hot?!?!?
  112. 6sn7 pre
  113. 12AY7/6SN7 preamp PSU check
  114. CT design trans application
  115. Shindo schematics?
  116. Octal Hagerman Cornet Experiences
  117. Zenith AM/FM C835 tube Radio schematic
  118. Oh man, my telefunken stoops...
  119. 42 single ended
  120. EL34 Feedback circuit
  121. Spice model for EL86/6CW5
  122. Ditching some High Voltage
  123. Newbie want to build simple tube preamp&psu!need help!
  124. Phono Pre-Design Input
  125. HV Direct Drive tube amp.
  126. A question about Cathodyne/split load/concertina PI's
  127. Kofi Annan in: "Hummin' Trafo Blues"
  128. Rattling Tube
  129. Berning output buffer
  130. Tube PSU Question
  131. JoLida Envoy PreAmp or DIY?
  132. Looking for Audio Note P1SE schematics.
  133. Which SE-ECL82 amp to build?
  134. PSU Help
  135. Help for stabilisator Data
  136. How much ripple on B+ is allowed?
  137. Typical 2A3 hum?
  138. PV10 PS transformer
  139. 300B Filament Voltage Range
  140. Mullard EL34-Authenticity Verification
  141. Philips V30M amplifier
  142. PWM power supply???
  143. Regulated psu for tube preamp
  144. About to start a new project: PP 6CK4s...
  145. Komuro DC 300B crct w/ 50dht?
  146. DIY speaker attenuator?
  147. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  148. Audio meet pics from this past weekend
  149. Audio Note M7 Line Preamp??
  150. PP 7591 amp
  151. Tube op amps
  152. Please tell me how to upgrade Music Angel KT88 amplifier?
  153. Do I want a fan?
  154. 3rd Aikido?
  155. More Questions about A.Wrights PP1C
  156. 7591s flashing on start-up?
  157. first amp build... wiring questions
  158. pentode aikido driver for 300b
  159. Question about single NOS triodes in cascode for fun
  160. oscillating PP EL84 amplifier
  161. 6H30P based cathode-follower schema kindly requested
  162. Cathode follower question
  163. Bunch of old parts, worth anything?
  164. 6922 vs. 6N1P Bass Response
  165. Behringer reaches a new high in tube "transparency"
  166. Input stage tube
  167. Using transformers as choke?
  168. Resistors
  169. melos gk1 preamps anybody?
  170. Looking for a thread...
  171. DG7-32 based oscillograph schematic needed
  172. Try!!! Ef37a + 6c33c
  173. qustion on tube grade wiring
  174. Balanced pre-amp attempt
  175. GRRR.. sanity check on PTx current please
  176. How do you measure ripple on the B+?
  177. Aikido + EL34 Integrated
  178. heater voltage: why ac, and not dc?
  179. Ideas for using one ECL82 in a preamp
  180. Question about 12AU7
  181. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  182. WIMA FKP1 1000V as coupling cap ??
  183. Ping amperex re: Hammond organs
  184. schematic needen variable power supply
  185. Distributed Load/Balanced Bridge Connection
  186. CCS, feedback and grid leak questions.
  187. Vdd
  188. Help with 6GW8/ECL86 tubes??
  189. Best amplifier (recomendations) for Fostex FE108ez?
  190. Quick valve construction question
  191. Poindexter's 6v6 PP amp
  192. need some help with Ohm's law-fast!
  193. hybrid rectifier question
  194. I really, really wish I hadn't done that...
  195. Quicksilver 8417 conversion
  196. Supratek
  197. remote OPT, stupid idea ?
  198. Autoformer output stage
  199. Remote Power Supply: A Stupid Idea?
  200. Rjm simple tube phono pre
  201. Voltage controlled filter with tubes ??
  202. Does this look right to you?
  203. PWM amplifier hooked onto a tube preamp
  204. Zenith Console Opt Question, Odd Secondary
  205. Marchand LN108 Tube Phono Preamp
  206. Anyone care to express an opinion on this output Transformer
  207. 6L6 Triode strapped amp suggestions
  208. 6F1 and 6P2 Equivalents
  209. in memoriam Fred N. AKA 807
  210. Perplexed by 5AR4 Tube Socket? Picture Included
  211. Push pull 300B and more than a few questions...
  212. First tube project.
  213. DHT learning
  214. how do i add adjustable bias on amp?
  215. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  216. Design Questions
  217. SRPP + Gainclone
  218. dht p-p filament question
  219. Report - 2005 London HiFi Show
  220. Want to build hi - power amp
  221. Can I mod this circuit to use 6922 tubes?
  222. tube preamp kit question (again?)
  223. 3f4 spice models needed
  224. Back to Back transformers to get +B of 200V ??
  225. New amp project-some ideas of my own and looking for input from others...
  226. Emphasising the transients, but making the mediocre listenable
  227. Looking For a PP 6Y6GA Design
  228. Industrial vs Commercial amps and OPT's
  229. ECC99 operating points?
  230. Preamp suggestions for a tube newbie
  231. very odd thing happening in my amp... help
  232. 47 Penthode in triode mode.
  233. Capacitor value
  234. PSE bias how?
  235. GM70 Power supply
  236. interstage convert to phase splitter
  237. EL84 SE advice'n'schematics needed
  238. world's heaviest 2A3 amp?
  239. How To Tell What Tubes To Keep
  240. PX4 Trauma
  241. An amplifier project I'm looking for...
  242. Your 100volt plus moment
  243. Dynaco rectifier replacement?
  244. SET on a budget
  245. PSU Design Learning Links
  246. Expensive Commercial Amps
  247. Tube modified CD player with TDA1543
  248. Fluorescent lamp choke - use in tube amp?
  249. Tube Overdrive
  250. Mains Transformer for EL34PP

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