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  1. EL34 Triode Mode - G3 where?
  2. Is "reforming" Electrolytic Capacitors necessary?
  3. Screen grid driver for PL519?
  4. Best replacment for a 6F2
  5. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  6. Pentode to Triode trick.
  7. 6550 making a Popping sound?
  8. Pie-eyed and puzzled...
  9. How about this schematic
  10. tube disorder
  11. PC choke in a preamp ?
  12. selective tone control
  13. time for a laugh
  14. Another New Build Pictures ( G' Amp )
  15. Help finding: 7-pin PCB socket, 90deg horizontal
  16. LC vs. CLC Theory
  17. Input transformer & volume pot
  18. MC34-B Quit working suddenly (newb)
  19. Golden Tube Audio 300B se
  20. Wanted: Pioneer sa-810 schematic
  21. se el34 finally
  22. Tube design question
  23. Marantz 8 clone build
  24. Active RIAA Eq for tubes- Brian Clark's article
  25. pre hums - even unplugged!
  26. Push Pull Preamplifier anybody?
  27. 6AN8 tube question
  28. Distortion in Fisher 800C
  29. 20% versus 43% screen tap
  30. Van der Veen transformers
  31. Want to upgrade Velleman K8020
  32. KT88 Power supply question
  33. TX coupled, pentode linestage
  34. phase splitter question
  35. New preamp project is online
  36. Newbie: Which amps to build?
  37. Which valve, 5842 (417A) or 6H30
  38. How do you punch out your chassis holes?
  39. recommend a 5Y3 based bass guitar amp?
  40. Help identifying tube tester
  41. paralelled tube
  42. ECC88 at 12 volts
  43. azarus preamplifier schematics
  44. Which valve amp do I keep?
  45. Favorite Driver for 845
  46. Somebody has that magazine?
  47. modify parallel push-pull EL84 to single push-pull
  48. How long it will last?
  49. Hurricane Wilma
  50. Suddenly, no output from Copland CTA-501
  51. 807 Audio Amp Progress Report
  52. Choke induced Hum
  53. Wim's DC EL84 amp
  54. Drivers for a KT88 pair
  55. what do u think of these tubes?
  56. 12BH7 spice 3f4 model
  57. Clone Marantz M7 Line Amp
  58. PIO caps question
  59. New Build Pics (guitar Amp)
  60. 6HF5 sweep tube single ended amp
  61. My first DIY
  62. Winding A Interstage Transformer
  63. help building 12ax7/el84 amp
  64. PSE schematic
  65. Using PSU Designer to calculate DC filament supply
  66. Dynaco stereo 70 driver board
  67. Excellent and cheap DIY INTERSTAGE!
  68. Need Advice with Timer Relay Shut Off
  69. standby switch
  70. Purpose of small cap across PSU rails?
  71. 6SL7 + EL34 SE Audio Amp
  72. guitar tube amp as home stereo
  73. 6C33 fixed/auto bias ?
  74. Long Tail and Local feedback
  75. I look for EAR 859 pictures.
  76. Designing a simple tube opamp?
  77. Difference between Hammond 200 and 300 series
  78. Ultrapath Cap
  79. where to find 600v 18awg wire??
  80. Suggested power supply B+?
  81. Variable Impedence Mic Preamp
  82. Help me stop my preamp from farting!
  83. Just bought some of those Russian paper/oil caps off of ebay
  84. The Valhalla power amplifier project
  85. help! EL84's dying
  86. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  87. ASC Polypropylene And Oil Capacitors
  88. pots... log or linear?
  89. Cracking sound through speakers.
  90. EL84-PP - Why just 5W?
  91. Brook12a schematics...
  92. LongTailedPair gain -> how to calculate?
  93. Wiring secondaries of two power trafo's in parallel?
  94. RIAA "Tube Simulations"
  95. Has anyone built this 'Svetlana Six Pack' ?
  96. updated pics of tube project
  97. help 12FV7 datasheet
  98. Why does my oversized preamp trafo gets much too hot?!?!?
  99. 6sn7 pre
  100. 12AY7/6SN7 preamp PSU check
  101. CT design trans application
  102. Shindo schematics?
  103. Octal Hagerman Cornet Experiences
  104. My first (guitar) amplifier
  105. Zenith AM/FM C835 tube Radio schematic
  106. Oh man, my telefunken stoops...
  107. 42 single ended
  108. EL34 Feedback circuit
  109. Spice model for EL86/6CW5
  110. Ditching some High Voltage
  111. Newbie want to build simple tube preamp&psu!need help!
  112. Phono Pre-Design Input
  113. HV Direct Drive tube amp.
  114. A question about Cathodyne/split load/concertina PI's
  115. Kofi Annan in: "Hummin' Trafo Blues"
  116. Rattling Tube
  117. Berning output buffer
  118. Tube PSU Question
  119. JoLida Envoy PreAmp or DIY?
  120. Looking for Audio Note P1SE schematics.
  121. Which SE-ECL82 amp to build?
  122. PSU Help
  123. Help for stabilisator Data
  124. How much ripple on B+ is allowed?
  125. Typical 2A3 hum?
  126. PV10 PS transformer
  127. 300B Filament Voltage Range
  128. Mullard EL34-Authenticity Verification
  129. Fading or Frying Fender Clone Issue
  130. Philips V30M amplifier
  131. PWM power supply???
  132. Regulated psu for tube preamp
  133. About to start a new project: PP 6CK4s...
  134. Komuro DC 300B crct w/ 50dht?
  135. Anyone out there try a SEPP OTL guitar amp??
  136. DIY speaker attenuator?
  137. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  138. Audio meet pics from this past weekend
  139. Audio Note M7 Line Preamp??
  140. PP 7591 amp
  141. Tube op amps
  142. Please tell me how to upgrade Music Angel KT88 amplifier?
  143. Do I want a fan?
  144. 3rd Aikido?
  145. More Questions about A.Wrights PP1C
  146. 7591s flashing on start-up?
  147. first amp build... wiring questions
  148. pentode aikido driver for 300b
  149. Question about single NOS triodes in cascode for fun
  150. oscillating PP EL84 amplifier
  151. 6H30P based cathode-follower schema kindly requested
  152. Cathode follower question
  153. Bunch of old parts, worth anything?
  154. 6922 vs. 6N1P Bass Response
  155. Behringer reaches a new high in tube "transparency"
  156. Input stage tube
  157. Using transformers as choke?
  158. Resistors
  159. melos gk1 preamps anybody?
  160. Looking for a thread...
  161. DG7-32 based oscillograph schematic needed
  162. Try!!! Ef37a + 6c33c
  163. qustion on tube grade wiring
  164. Balanced pre-amp attempt
  165. GRRR.. sanity check on PTx current please
  166. How do you measure ripple on the B+?
  167. Aikido + EL34 Integrated
  168. heater voltage: why ac, and not dc?
  169. Ideas for using one ECL82 in a preamp
  170. Question about 12AU7
  171. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  172. WIMA FKP1 1000V as coupling cap ??
  173. Ping amperex re: Hammond organs
  174. schematic needen variable power supply
  175. Distributed Load/Balanced Bridge Connection
  176. CCS, feedback and grid leak questions.
  177. Vdd
  178. Help with 6GW8/ECL86 tubes??
  179. Best amplifier (recomendations) for Fostex FE108ez?
  180. Quick valve construction question
  181. Poindexter's 6v6 PP amp
  182. need some help with Ohm's law-fast!
  183. hybrid rectifier question
  184. I really, really wish I hadn't done that...
  185. Quicksilver 8417 conversion
  186. Supratek
  187. remote OPT, stupid idea ?
  188. Autoformer output stage
  189. Remote Power Supply: A Stupid Idea?
  190. Rjm simple tube phono pre
  191. Voltage controlled filter with tubes ??
  192. Does this look right to you?
  193. PWM amplifier hooked onto a tube preamp
  194. Zenith Console Opt Question, Odd Secondary
  195. Marchand LN108 Tube Phono Preamp
  196. Anyone care to express an opinion on this output Transformer
  197. 6L6 Triode strapped amp suggestions
  198. 6F1 and 6P2 Equivalents
  199. in memoriam Fred N. AKA 807
  200. Perplexed by 5AR4 Tube Socket? Picture Included
  201. Push pull 300B and more than a few questions...
  202. First tube project.
  203. DHT learning
  204. how do i add adjustable bias on amp?
  205. Tube tester: Accurate Instruments Model 157
  206. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  207. Design Questions
  208. SRPP + Gainclone
  209. dht p-p filament question
  210. Report - 2005 London HiFi Show
  211. Want to build hi - power amp
  212. Gibson Skylark Grouding Questions
  213. Can I mod this circuit to use 6922 tubes?
  214. tube preamp kit question (again?)
  215. 3f4 spice models needed
  216. Back to Back transformers to get +B of 200V ??
  217. New amp project-some ideas of my own and looking for input from others...
  218. Emphasising the transients, but making the mediocre listenable
  219. Looking For a PP 6Y6GA Design
  220. Industrial vs Commercial amps and OPT's
  221. ECC99 operating points?
  222. Preamp suggestions for a tube newbie
  223. very odd thing happening in my amp... help
  224. 47 Penthode in triode mode.
  225. Capacitor value
  226. PSE bias how?
  227. GM70 Power supply
  228. interstage convert to phase splitter
  229. EL84 SE advice'n'schematics needed
  230. world's heaviest 2A3 amp?
  231. How To Tell What Tubes To Keep
  232. PX4 Trauma
  233. An amplifier project I'm looking for...
  234. Your 100volt plus moment
  235. Dynaco rectifier replacement?
  236. SET on a budget
  237. PSU Design Learning Links
  238. Expensive Commercial Amps
  239. Tube modified CD player with TDA1543
  240. Types of polypropylene capacitor....
  241. Fluorescent lamp choke - use in tube amp?
  242. Tube Overdrive
  243. Mains Transformer for EL34PP
  244. Please review schematic
  245. Wire size for projects?
  246. super simple tube amp needed...
  247. Modifing A Fender Bassman Scheme
  248. Matlab-based triode modelling software
  249. 12AT7 Pre-amp schematic, where to find?
  250. Test settings for Hickok 539A for 183/483 tube?

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