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  1. Need help with tube test data - fast
  2. Show me a schema 6Pi3C-E Push-pull
  3. Help about the 6SN7/5692 linestage
  4. Active load output stage
  5. Power supply question
  6. EL34 Triode Mode - G3 where?
  7. Is "reforming" Electrolytic Capacitors necessary?
  8. Screen grid driver for PL519?
  9. Best replacment for a 6F2
  10. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  11. Pentode to Triode trick.
  12. 6550 making a Popping sound?
  13. Pie-eyed and puzzled...
  14. How about this schematic
  15. tube disorder
  16. PC choke in a preamp ?
  17. selective tone control
  18. time for a laugh
  19. Another New Build Pictures ( G' Amp )
  20. Help finding: 7-pin PCB socket, 90deg horizontal
  21. LC vs. CLC Theory
  22. Input transformer & volume pot
  23. MC34-B Quit working suddenly (newb)
  24. Golden Tube Audio 300B se
  25. Wanted: Pioneer sa-810 schematic
  26. se el34 finally
  27. Tube design question
  28. Marantz 8 clone build
  29. Active RIAA Eq for tubes- Brian Clark's article
  30. pre hums - even unplugged!
  31. Push Pull Preamplifier anybody?
  32. 6AN8 tube question
  33. Distortion in Fisher 800C
  34. 20% versus 43% screen tap
  35. Van der Veen transformers
  36. Want to upgrade Velleman K8020
  37. KT88 Power supply question
  38. TX coupled, pentode linestage
  39. phase splitter question
  40. New preamp project is online
  41. Newbie: Which amps to build?
  42. Which valve, 5842 (417A) or 6H30
  43. How do you punch out your chassis holes?
  44. recommend a 5Y3 based bass guitar amp?
  45. Help identifying tube tester
  46. paralelled tube
  47. ECC88 at 12 volts
  48. azarus preamplifier schematics
  49. Which valve amp do I keep?
  50. Favorite Driver for 845
  51. Somebody has that magazine?
  52. modify parallel push-pull EL84 to single push-pull
  53. How long it will last?
  54. Hurricane Wilma
  55. Suddenly, no output from Copland CTA-501
  56. 807 Audio Amp Progress Report
  57. Choke induced Hum
  58. Wim's DC EL84 amp
  59. Drivers for a KT88 pair
  60. what do u think of these tubes?
  61. 12BH7 spice 3f4 model
  62. Clone Marantz M7 Line Amp
  63. PIO caps question
  64. New Build Pics (guitar Amp)
  65. 6HF5 sweep tube single ended amp
  66. My first DIY
  67. Winding A Interstage Transformer
  68. help building 12ax7/el84 amp
  69. PSE schematic
  70. Using PSU Designer to calculate DC filament supply
  71. Dynaco stereo 70 driver board
  72. Excellent and cheap DIY INTERSTAGE!
  73. Need Advice with Timer Relay Shut Off
  74. standby switch
  75. Purpose of small cap across PSU rails?
  76. 6SL7 + EL34 SE Audio Amp
  77. guitar tube amp as home stereo
  78. 6C33 fixed/auto bias ?
  79. Long Tail and Local feedback
  80. I look for EAR 859 pictures.
  81. Designing a simple tube opamp?
  82. Difference between Hammond 200 and 300 series
  83. Ultrapath Cap
  84. where to find 600v 18awg wire??
  85. Suggested power supply B+?
  86. Variable Impedence Mic Preamp
  87. Help me stop my preamp from farting!
  88. Just bought some of those Russian paper/oil caps off of ebay
  89. The Valhalla power amplifier project
  90. help! EL84's dying
  91. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  92. ASC Polypropylene And Oil Capacitors
  93. pots... log or linear?
  94. Cracking sound through speakers.
  95. EL84-PP - Why just 5W?
  96. Brook12a schematics...
  97. LongTailedPair gain -> how to calculate?
  98. Wiring secondaries of two power trafo's in parallel?
  99. RIAA "Tube Simulations"
  100. Has anyone built this 'Svetlana Six Pack' ?
  101. updated pics of tube project
  102. help 12FV7 datasheet
  103. Why does my oversized preamp trafo gets much too hot?!?!?
  104. 6sn7 pre
  105. 12AY7/6SN7 preamp PSU check
  106. CT design trans application
  107. Shindo schematics?
  108. Octal Hagerman Cornet Experiences
  109. My first (guitar) amplifier
  110. Zenith AM/FM C835 tube Radio schematic
  111. Oh man, my telefunken stoops...
  112. 42 single ended
  113. EL34 Feedback circuit
  114. Spice model for EL86/6CW5
  115. Ditching some High Voltage
  116. Newbie want to build simple tube preamp&psu!need help!
  117. Phono Pre-Design Input
  118. HV Direct Drive tube amp.
  119. A question about Cathodyne/split load/concertina PI's
  120. Kofi Annan in: "Hummin' Trafo Blues"
  121. Rattling Tube
  122. Berning output buffer
  123. Tube PSU Question
  124. JoLida Envoy PreAmp or DIY?
  125. Looking for Audio Note P1SE schematics.
  126. Which SE-ECL82 amp to build?
  127. PSU Help
  128. Help for stabilisator Data
  129. How much ripple on B+ is allowed?
  130. Typical 2A3 hum?
  131. PV10 PS transformer
  132. 300B Filament Voltage Range
  133. Mullard EL34-Authenticity Verification
  134. Fading or Frying Fender Clone Issue
  135. Philips V30M amplifier
  136. PWM power supply???
  137. Regulated psu for tube preamp
  138. About to start a new project: PP 6CK4s...
  139. Komuro DC 300B crct w/ 50dht?
  140. Anyone out there try a SEPP OTL guitar amp??
  141. DIY speaker attenuator?
  142. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  143. Audio meet pics from this past weekend
  144. Audio Note M7 Line Preamp??
  145. PP 7591 amp
  146. Tube op amps
  147. Please tell me how to upgrade Music Angel KT88 amplifier?
  148. Do I want a fan?
  149. 3rd Aikido?
  150. More Questions about A.Wrights PP1C
  151. 7591s flashing on start-up?
  152. first amp build... wiring questions
  153. pentode aikido driver for 300b
  154. Question about single NOS triodes in cascode for fun
  155. oscillating PP EL84 amplifier
  156. 6H30P based cathode-follower schema kindly requested
  157. Cathode follower question
  158. Bunch of old parts, worth anything?
  159. 6922 vs. 6N1P Bass Response
  160. Behringer reaches a new high in tube "transparency"
  161. Input stage tube
  162. Using transformers as choke?
  163. Resistors
  164. melos gk1 preamps anybody?
  165. Looking for a thread...
  166. DG7-32 based oscillograph schematic needed
  167. Try!!! Ef37a + 6c33c
  168. qustion on tube grade wiring
  169. Balanced pre-amp attempt
  170. GRRR.. sanity check on PTx current please
  171. How do you measure ripple on the B+?
  172. Aikido + EL34 Integrated
  173. heater voltage: why ac, and not dc?
  174. Ideas for using one ECL82 in a preamp
  175. Question about 12AU7
  176. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  177. WIMA FKP1 1000V as coupling cap ??
  178. Ping amperex re: Hammond organs
  179. schematic needen variable power supply
  180. Distributed Load/Balanced Bridge Connection
  181. CCS, feedback and grid leak questions.
  182. Vdd
  183. Help with 6GW8/ECL86 tubes??
  184. Best amplifier (recomendations) for Fostex FE108ez?
  185. Quick valve construction question
  186. Poindexter's 6v6 PP amp
  187. need some help with Ohm's law-fast!
  188. hybrid rectifier question
  189. I really, really wish I hadn't done that...
  190. Quicksilver 8417 conversion
  191. Supratek
  192. remote OPT, stupid idea ?
  193. Autoformer output stage
  194. Remote Power Supply: A Stupid Idea?
  195. Rjm simple tube phono pre
  196. Voltage controlled filter with tubes ??
  197. Does this look right to you?
  198. PWM amplifier hooked onto a tube preamp
  199. Zenith Console Opt Question, Odd Secondary
  200. Marchand LN108 Tube Phono Preamp
  201. Anyone care to express an opinion on this output Transformer
  202. 6L6 Triode strapped amp suggestions
  203. 6F1 and 6P2 Equivalents
  204. in memoriam Fred N. AKA 807
  205. Perplexed by 5AR4 Tube Socket? Picture Included
  206. Push pull 300B and more than a few questions...
  207. First tube project.
  208. DHT learning
  209. how do i add adjustable bias on amp?
  210. Tube tester: Accurate Instruments Model 157
  211. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  212. Design Questions
  213. SRPP + Gainclone
  214. dht p-p filament question
  215. Report - 2005 London HiFi Show
  216. Want to build hi - power amp
  217. Gibson Skylark Grouding Questions
  218. Can I mod this circuit to use 6922 tubes?
  219. tube preamp kit question (again?)
  220. 3f4 spice models needed
  221. Back to Back transformers to get +B of 200V ??
  222. New amp project-some ideas of my own and looking for input from others...
  223. Emphasising the transients, but making the mediocre listenable
  224. Looking For a PP 6Y6GA Design
  225. Industrial vs Commercial amps and OPT's
  226. ECC99 operating points?
  227. Preamp suggestions for a tube newbie
  228. very odd thing happening in my amp... help
  229. 47 Penthode in triode mode.
  230. Capacitor value
  231. PSE bias how?
  232. GM70 Power supply
  233. interstage convert to phase splitter
  234. EL84 SE advice'n'schematics needed
  235. world's heaviest 2A3 amp?
  236. How To Tell What Tubes To Keep
  237. PX4 Trauma
  238. An amplifier project I'm looking for...
  239. Your 100volt plus moment
  240. Dynaco rectifier replacement?
  241. SET on a budget
  242. PSU Design Learning Links
  243. Expensive Commercial Amps
  244. Tube modified CD player with TDA1543
  245. Types of polypropylene capacitor....
  246. Fluorescent lamp choke - use in tube amp?
  247. Tube Overdrive
  248. Mains Transformer for EL34PP
  249. Please review schematic
  250. Wire size for projects?

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