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  1. Using a mosfet to drop B+?
  2. drawings vs. schematics
  3. New TEK Scopes
  4. Transfos Anyone?
  5. Ripple guidelines for power supplies
  6. Mains transformer orientation
  7. New Nightmare (Guitar Amp)
  8. AMD tube integrated tube amp
  9. Using Choke in LCRC filter in power supply
  10. Need good current sink JFET or MOSFET?
  11. Setting Up a Circuit for Testing
  12. 6H6 question
  13. Kennedy Tube Audio Website Hijacked
  14. Yet another 12B4 line stage, or is the 12B4 better than the Grounded Grid.....
  15. transformer for Philips AG9015
  16. Real McTube Help
  17. Where are the 307A / VT225 amps?
  18. Anyone have a single el84 PPP OPT?
  19. Finished First Guitar Amp
  20. Using an old power transformer as a choke?
  21. Convergent Audio Technology SL-1 Scematics
  22. Poinz 6AQ5 Linestage
  23. microphone preamp
  24. Ticking noise, need help.
  25. Humm in my preamp...
  26. Enclosure suggestion/questions
  27. Calculating Tube Parameters +SPICE
  28. Loudspeaker for TUBE DIYer
  29. Tube ID 18R-AL1?
  30. 6l6gc Tube Drive
  31. Need a little help, TT and PC? Amp Kit?
  32. 12ax7 preamp
  33. 308/ecll800 Lorenz
  34. How did you do your Aikido?
  35. Thoughts on this 807 design
  36. Rectifier compatibilty
  37. Tube amp for biamped speaker
  38. 12ae6, 12fk6, 12fm6 diode specs
  39. Any software out there for taking the headache out of composite loadlines?
  40. Driving a single 6L6GC with 12AX7
  41. quick 50c5 to play around with
  42. A question about distortion in SE vs. PP designs:
  43. Need help on first tube amp rebuild -trans problems
  44. HAMMOND 125ESE Transformer WIRING
  45. preamp ps problem
  46. What does everybody really NEED???
  47. Marantz 7C still good today?
  48. Magnavox Chassis #196-55 Resistor Question
  49. 6BL7
  50. altec/peerless mystery amp
  51. 6gk8 triode pentode tube data
  52. Low Current Source
  53. Parallel Single-Ended Questions
  54. Tube power ratings
  55. 6DJ8 or 12xx7 for hybrid amp (Monarchy)
  56. What did I do wrong with LEGACY????
  57. seeking: tube for a SEP parallel feed like an EL84, but with a lower Ra
  58. Tube Tracer
  59. a question of tube behaviour
  60. Which tube? ECC82, 6SN7 or 6SL7
  61. oscillator
  62. The Covi Mark II Circlotron Amp
  63. HT transformers and polarity
  64. Hammond 156C - good Plate choke load??
  65. Music Man sixtyfive reverb head needs help!
  66. DIY pre-amp kit vote
  67. 6550 tubes
  68. Is the 6N6P a direct substitute for the 5687?
  69. SE amp using 1619 instead of 45 triode
  70. Akai M-7 Amp Schematics?
  71. asl 845 monos mods
  72. 3 stages... Two Power Supplies
  73. RCA 7094 tetrodes...
  74. KT88 push pull
  75. Tube amp fan?
  76. Ping gerd.....
  77. Need help finding Sovtel EL84M tubes
  78. Min. current draw for choke input?
  79. Passive RIAA with tubes
  80. Oscillation Mystery
  81. unison research P30K schem?
  82. Can I use a 5R4 GY in place of a 5AR4?
  83. Seeking for all Norman H. Crowhurst papers
  84. best way to elevate heater?
  85. Tube Load Line
  86. Homemade Vacuum Tube
  87. beardm70mk2-want less b+
  88. Need help with tube test data - fast
  89. Show me a schema 6Pi3C-E Push-pull
  90. Help about the 6SN7/5692 linestage
  91. Active load output stage
  92. Power supply question
  93. EL34 Triode Mode - G3 where?
  94. Is "reforming" Electrolytic Capacitors necessary?
  95. Screen grid driver for PL519?
  96. Best replacment for a 6F2
  97. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  98. Pentode to Triode trick.
  99. 6550 making a Popping sound?
  100. Pie-eyed and puzzled...
  101. How about this schematic
  102. tube disorder
  103. PC choke in a preamp ?
  104. selective tone control
  105. time for a laugh
  106. Another New Build Pictures ( G' Amp )
  107. Help finding: 7-pin PCB socket, 90deg horizontal
  108. LC vs. CLC Theory
  109. Input transformer & volume pot
  110. MC34-B Quit working suddenly (newb)
  111. Golden Tube Audio 300B se
  112. Wanted: Pioneer sa-810 schematic
  113. se el34 finally
  114. Tube design question
  115. Marantz 8 clone build
  116. Active RIAA Eq for tubes- Brian Clark's article
  117. pre hums - even unplugged!
  118. Push Pull Preamplifier anybody?
  119. 6AN8 tube question
  120. Distortion in Fisher 800C
  121. 20% versus 43% screen tap
  122. Van der Veen transformers
  123. Want to upgrade Velleman K8020
  124. KT88 Power supply question
  125. TX coupled, pentode linestage
  126. phase splitter question
  127. New preamp project is online
  128. Newbie: Which amps to build?
  129. Which valve, 5842 (417A) or 6H30
  130. How do you punch out your chassis holes?
  131. recommend a 5Y3 based bass guitar amp?
  132. Help identifying tube tester
  133. paralelled tube
  134. ECC88 at 12 volts
  135. azarus preamplifier schematics
  136. Which valve amp do I keep?
  137. Favorite Driver for 845
  138. Somebody has that magazine?
  139. modify parallel push-pull EL84 to single push-pull
  140. How long it will last?
  141. Hurricane Wilma
  142. Suddenly, no output from Copland CTA-501
  143. 807 Audio Amp Progress Report
  144. Choke induced Hum
  145. Wim's DC EL84 amp
  146. Drivers for a KT88 pair
  147. what do u think of these tubes?
  148. 12BH7 spice 3f4 model
  149. Clone Marantz M7 Line Amp
  150. PIO caps question
  151. New Build Pics (guitar Amp)
  152. 6HF5 sweep tube single ended amp
  153. My first DIY
  154. Winding A Interstage Transformer
  155. help building 12ax7/el84 amp
  156. PSE schematic
  157. Using PSU Designer to calculate DC filament supply
  158. Dynaco stereo 70 driver board
  159. Excellent and cheap DIY INTERSTAGE!
  160. Need Advice with Timer Relay Shut Off
  161. standby switch
  162. Purpose of small cap across PSU rails?
  163. 6SL7 + EL34 SE Audio Amp
  164. guitar tube amp as home stereo
  165. 6C33 fixed/auto bias ?
  166. Long Tail and Local feedback
  167. I look for EAR 859 pictures.
  168. Designing a simple tube opamp?
  169. Difference between Hammond 200 and 300 series
  170. Ultrapath Cap
  171. where to find 600v 18awg wire??
  172. Suggested power supply B+?
  173. Variable Impedence Mic Preamp
  174. Help me stop my preamp from farting!
  175. Just bought some of those Russian paper/oil caps off of ebay
  176. The Valhalla power amplifier project
  177. help! EL84's dying
  178. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  179. ASC Polypropylene And Oil Capacitors
  180. pots... log or linear?
  181. Cracking sound through speakers.
  182. EL84-PP - Why just 5W?
  183. Brook12a schematics...
  184. LongTailedPair gain -> how to calculate?
  185. Wiring secondaries of two power trafo's in parallel?
  186. RIAA "Tube Simulations"
  187. Has anyone built this 'Svetlana Six Pack' ?
  188. updated pics of tube project
  189. help 12FV7 datasheet
  190. Why does my oversized preamp trafo gets much too hot?!?!?
  191. 6sn7 pre
  192. 12AY7/6SN7 preamp PSU check
  193. CT design trans application
  194. Shindo schematics?
  195. Octal Hagerman Cornet Experiences
  196. My first (guitar) amplifier
  197. Zenith AM/FM C835 tube Radio schematic
  198. Oh man, my telefunken stoops...
  199. 42 single ended
  200. EL34 Feedback circuit
  201. Spice model for EL86/6CW5
  202. Ditching some High Voltage
  203. Newbie want to build simple tube preamp&psu!need help!
  204. Phono Pre-Design Input
  205. HV Direct Drive tube amp.
  206. A question about Cathodyne/split load/concertina PI's
  207. Kofi Annan in: "Hummin' Trafo Blues"
  208. Rattling Tube
  209. Berning output buffer
  210. Tube PSU Question
  211. JoLida Envoy PreAmp or DIY?
  212. Looking for Audio Note P1SE schematics.
  213. Which SE-ECL82 amp to build?
  214. PSU Help
  215. Help for stabilisator Data
  216. How much ripple on B+ is allowed?
  217. Typical 2A3 hum?
  218. PV10 PS transformer
  219. 300B Filament Voltage Range
  220. Mullard EL34-Authenticity Verification
  221. Fading or Frying Fender Clone Issue
  222. Philips V30M amplifier
  223. PWM power supply???
  224. Regulated psu for tube preamp
  225. About to start a new project: PP 6CK4s...
  226. Komuro DC 300B crct w/ 50dht?
  227. Anyone out there try a SEPP OTL guitar amp??
  228. DIY speaker attenuator?
  229. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  230. Audio meet pics from this past weekend
  231. Audio Note M7 Line Preamp??
  232. PP 7591 amp
  233. Tube op amps
  234. Please tell me how to upgrade Music Angel KT88 amplifier?
  235. Do I want a fan?
  236. 3rd Aikido?
  237. More Questions about A.Wrights PP1C
  238. 7591s flashing on start-up?
  239. first amp build... wiring questions
  240. pentode aikido driver for 300b
  241. Question about single NOS triodes in cascode for fun
  242. oscillating PP EL84 amplifier
  243. 6H30P based cathode-follower schema kindly requested
  244. Cathode follower question
  245. Bunch of old parts, worth anything?
  246. 6922 vs. 6N1P Bass Response
  247. Behringer reaches a new high in tube "transparency"
  248. Input stage tube
  249. Using transformers as choke?
  250. Resistors

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