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

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