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  1. Homemade Vacuum Tube
  2. beardm70mk2-want less b+
  3. Need help with tube test data - fast
  4. Show me a schema 6Pi3C-E Push-pull
  5. Help about the 6SN7/5692 linestage
  6. Active load output stage
  7. Power supply question
  8. EL34 Triode Mode - G3 where?
  9. Is "reforming" Electrolytic Capacitors necessary?
  10. Screen grid driver for PL519?
  11. Best replacment for a 6F2
  12. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  13. Pentode to Triode trick.
  14. 6550 making a Popping sound?
  15. Pie-eyed and puzzled...
  16. How about this schematic
  17. tube disorder
  18. PC choke in a preamp ?
  19. selective tone control
  20. time for a laugh
  21. Another New Build Pictures ( G' Amp )
  22. Help finding: 7-pin PCB socket, 90deg horizontal
  23. LC vs. CLC Theory
  24. Input transformer & volume pot
  25. MC34-B Quit working suddenly (newb)
  26. Golden Tube Audio 300B se
  27. Wanted: Pioneer sa-810 schematic
  28. se el34 finally
  29. Tube design question
  30. Marantz 8 clone build
  31. Active RIAA Eq for tubes- Brian Clark's article
  32. pre hums - even unplugged!
  33. Push Pull Preamplifier anybody?
  34. 6AN8 tube question
  35. Distortion in Fisher 800C
  36. 20% versus 43% screen tap
  37. Van der Veen transformers
  38. Want to upgrade Velleman K8020
  39. KT88 Power supply question
  40. TX coupled, pentode linestage
  41. phase splitter question
  42. New preamp project is online
  43. Newbie: Which amps to build?
  44. Which valve, 5842 (417A) or 6H30
  45. How do you punch out your chassis holes?
  46. recommend a 5Y3 based bass guitar amp?
  47. Help identifying tube tester
  48. paralelled tube
  49. ECC88 at 12 volts
  50. azarus preamplifier schematics
  51. Which valve amp do I keep?
  52. Favorite Driver for 845
  53. Somebody has that magazine?
  54. modify parallel push-pull EL84 to single push-pull
  55. How long it will last?
  56. Hurricane Wilma
  57. Suddenly, no output from Copland CTA-501
  58. 807 Audio Amp Progress Report
  59. Choke induced Hum
  60. Wim's DC EL84 amp
  61. Drivers for a KT88 pair
  62. what do u think of these tubes?
  63. 12BH7 spice 3f4 model
  64. Clone Marantz M7 Line Amp
  65. PIO caps question
  66. New Build Pics (guitar Amp)
  67. 6HF5 sweep tube single ended amp
  68. My first DIY
  69. Winding A Interstage Transformer
  70. help building 12ax7/el84 amp
  71. PSE schematic
  72. Using PSU Designer to calculate DC filament supply
  73. Dynaco stereo 70 driver board
  74. Excellent and cheap DIY INTERSTAGE!
  75. Need Advice with Timer Relay Shut Off
  76. standby switch
  77. Purpose of small cap across PSU rails?
  78. 6SL7 + EL34 SE Audio Amp
  79. guitar tube amp as home stereo
  80. 6C33 fixed/auto bias ?
  81. Long Tail and Local feedback
  82. I look for EAR 859 pictures.
  83. Designing a simple tube opamp?
  84. Difference between Hammond 200 and 300 series
  85. Ultrapath Cap
  86. where to find 600v 18awg wire??
  87. Suggested power supply B+?
  88. Variable Impedence Mic Preamp
  89. Help me stop my preamp from farting!
  90. Just bought some of those Russian paper/oil caps off of ebay
  91. The Valhalla power amplifier project
  92. help! EL84's dying
  93. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  94. ASC Polypropylene And Oil Capacitors
  95. pots... log or linear?
  96. Cracking sound through speakers.
  97. EL84-PP - Why just 5W?
  98. Brook12a schematics...
  99. LongTailedPair gain -> how to calculate?
  100. Wiring secondaries of two power trafo's in parallel?
  101. RIAA "Tube Simulations"
  102. Has anyone built this 'Svetlana Six Pack' ?
  103. updated pics of tube project
  104. help 12FV7 datasheet
  105. Why does my oversized preamp trafo gets much too hot?!?!?
  106. 6sn7 pre
  107. 12AY7/6SN7 preamp PSU check
  108. CT design trans application
  109. Shindo schematics?
  110. Octal Hagerman Cornet Experiences
  111. My first (guitar) amplifier
  112. Zenith AM/FM C835 tube Radio schematic
  113. Oh man, my telefunken stoops...
  114. 42 single ended
  115. EL34 Feedback circuit
  116. Spice model for EL86/6CW5
  117. Ditching some High Voltage
  118. Newbie want to build simple tube preamp&psu!need help!
  119. Phono Pre-Design Input
  120. HV Direct Drive tube amp.
  121. A question about Cathodyne/split load/concertina PI's
  122. Kofi Annan in: "Hummin' Trafo Blues"
  123. Rattling Tube
  124. Berning output buffer
  125. Tube PSU Question
  126. JoLida Envoy PreAmp or DIY?
  127. Looking for Audio Note P1SE schematics.
  128. Which SE-ECL82 amp to build?
  129. PSU Help
  130. Help for stabilisator Data
  131. How much ripple on B+ is allowed?
  132. Typical 2A3 hum?
  133. PV10 PS transformer
  134. 300B Filament Voltage Range
  135. Mullard EL34-Authenticity Verification
  136. Fading or Frying Fender Clone Issue
  137. Philips V30M amplifier
  138. PWM power supply???
  139. Regulated psu for tube preamp
  140. About to start a new project: PP 6CK4s...
  141. Komuro DC 300B crct w/ 50dht?
  142. Anyone out there try a SEPP OTL guitar amp??
  143. DIY speaker attenuator?
  144. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  145. Audio meet pics from this past weekend
  146. Audio Note M7 Line Preamp??
  147. PP 7591 amp
  148. Tube op amps
  149. Please tell me how to upgrade Music Angel KT88 amplifier?
  150. Do I want a fan?
  151. 3rd Aikido?
  152. More Questions about A.Wrights PP1C
  153. 7591s flashing on start-up?
  154. first amp build... wiring questions
  155. pentode aikido driver for 300b
  156. Question about single NOS triodes in cascode for fun
  157. oscillating PP EL84 amplifier
  158. 6H30P based cathode-follower schema kindly requested
  159. Cathode follower question
  160. Bunch of old parts, worth anything?
  161. 6922 vs. 6N1P Bass Response
  162. Behringer reaches a new high in tube "transparency"
  163. Input stage tube
  164. Using transformers as choke?
  165. Resistors
  166. melos gk1 preamps anybody?
  167. Looking for a thread...
  168. DG7-32 based oscillograph schematic needed
  169. Try!!! Ef37a + 6c33c
  170. qustion on tube grade wiring
  171. Balanced pre-amp attempt
  172. GRRR.. sanity check on PTx current please
  173. How do you measure ripple on the B+?
  174. Aikido + EL34 Integrated
  175. heater voltage: why ac, and not dc?
  176. Ideas for using one ECL82 in a preamp
  177. Question about 12AU7
  178. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  179. WIMA FKP1 1000V as coupling cap ??
  180. Ping amperex re: Hammond organs
  181. schematic needen variable power supply
  182. Distributed Load/Balanced Bridge Connection
  183. CCS, feedback and grid leak questions.
  184. Vdd
  185. Help with 6GW8/ECL86 tubes??
  186. Best amplifier (recomendations) for Fostex FE108ez?
  187. Quick valve construction question
  188. Poindexter's 6v6 PP amp
  189. need some help with Ohm's law-fast!
  190. hybrid rectifier question
  191. I really, really wish I hadn't done that...
  192. Quicksilver 8417 conversion
  193. Supratek
  194. remote OPT, stupid idea ?
  195. Autoformer output stage
  196. Remote Power Supply: A Stupid Idea?
  197. Rjm simple tube phono pre
  198. Voltage controlled filter with tubes ??
  199. Does this look right to you?
  200. PWM amplifier hooked onto a tube preamp
  201. Zenith Console Opt Question, Odd Secondary
  202. Marchand LN108 Tube Phono Preamp
  203. Anyone care to express an opinion on this output Transformer
  204. 6L6 Triode strapped amp suggestions
  205. 6F1 and 6P2 Equivalents
  206. in memoriam Fred N. AKA 807
  207. Perplexed by 5AR4 Tube Socket? Picture Included
  208. Push pull 300B and more than a few questions...
  209. First tube project.
  210. DHT learning
  211. how do i add adjustable bias on amp?
  212. Tube tester: Accurate Instruments Model 157
  213. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  214. Design Questions
  215. SRPP + Gainclone
  216. dht p-p filament question
  217. Report - 2005 London HiFi Show
  218. Want to build hi - power amp
  219. Gibson Skylark Grouding Questions
  220. Can I mod this circuit to use 6922 tubes?
  221. tube preamp kit question (again?)
  222. 3f4 spice models needed
  223. Back to Back transformers to get +B of 200V ??
  224. New amp project-some ideas of my own and looking for input from others...
  225. Emphasising the transients, but making the mediocre listenable
  226. Looking For a PP 6Y6GA Design
  227. Industrial vs Commercial amps and OPT's
  228. ECC99 operating points?
  229. Preamp suggestions for a tube newbie
  230. very odd thing happening in my amp... help
  231. 47 Penthode in triode mode.
  232. Capacitor value
  233. PSE bias how?
  234. GM70 Power supply
  235. interstage convert to phase splitter
  236. EL84 SE advice'n'schematics needed
  237. world's heaviest 2A3 amp?
  238. How To Tell What Tubes To Keep
  239. PX4 Trauma
  240. An amplifier project I'm looking for...
  241. Your 100volt plus moment
  242. Dynaco rectifier replacement?
  243. SET on a budget
  244. PSU Design Learning Links
  245. Expensive Commercial Amps
  246. Tube modified CD player with TDA1543
  247. Types of polypropylene capacitor....
  248. Fluorescent lamp choke - use in tube amp?
  249. Tube Overdrive
  250. Mains Transformer for EL34PP

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