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  1. Where are the 307A / VT225 amps?
  2. Anyone have a single el84 PPP OPT?
  3. Finished First Guitar Amp
  4. Using an old power transformer as a choke?
  5. Convergent Audio Technology SL-1 Scematics
  6. Poinz 6AQ5 Linestage
  7. microphone preamp
  8. Ticking noise, need help.
  9. Humm in my preamp...
  10. Enclosure suggestion/questions
  11. Calculating Tube Parameters +SPICE
  12. Loudspeaker for TUBE DIYer
  13. Tube ID 18R-AL1?
  14. 6l6gc Tube Drive
  15. Need a little help, TT and PC? Amp Kit?
  16. 12ax7 preamp
  17. 308/ecll800 Lorenz
  18. How did you do your Aikido?
  19. Thoughts on this 807 design
  20. Rectifier compatibilty
  21. Tube amp for biamped speaker
  22. 12ae6, 12fk6, 12fm6 diode specs
  23. Any software out there for taking the headache out of composite loadlines?
  24. Driving a single 6L6GC with 12AX7
  25. quick 50c5 to play around with
  26. A question about distortion in SE vs. PP designs:
  27. Need help on first tube amp rebuild -trans problems
  28. HAMMOND 125ESE Transformer WIRING
  29. preamp ps problem
  30. What does everybody really NEED???
  31. Marantz 7C still good today?
  32. Magnavox Chassis #196-55 Resistor Question
  33. 6BL7
  34. altec/peerless mystery amp
  35. 6gk8 triode pentode tube data
  36. Low Current Source
  37. Parallel Single-Ended Questions
  38. Tube power ratings
  39. 6DJ8 or 12xx7 for hybrid amp (Monarchy)
  40. What did I do wrong with LEGACY????
  41. seeking: tube for a SEP parallel feed like an EL84, but with a lower Ra
  42. Tube Tracer
  43. a question of tube behaviour
  44. Which tube? ECC82, 6SN7 or 6SL7
  45. oscillator
  46. The Covi Mark II Circlotron Amp
  47. HT transformers and polarity
  48. Hammond 156C - good Plate choke load??
  49. Music Man sixtyfive reverb head needs help!
  50. DIY pre-amp kit vote
  51. 6550 tubes
  52. Is the 6N6P a direct substitute for the 5687?
  53. SE amp using 1619 instead of 45 triode
  54. Akai M-7 Amp Schematics?
  55. asl 845 monos mods
  56. 3 stages... Two Power Supplies
  57. RCA 7094 tetrodes...
  58. KT88 push pull
  59. Tube amp fan?
  60. Ping gerd.....
  61. Need help finding Sovtel EL84M tubes
  62. Min. current draw for choke input?
  63. Passive RIAA with tubes
  64. Oscillation Mystery
  65. unison research P30K schem?
  66. Can I use a 5R4 GY in place of a 5AR4?
  67. Seeking for all Norman H. Crowhurst papers
  68. best way to elevate heater?
  69. Tube Load Line
  70. Homemade Vacuum Tube
  71. beardm70mk2-want less b+
  72. Need help with tube test data - fast
  73. Show me a schema 6Pi3C-E Push-pull
  74. Help about the 6SN7/5692 linestage
  75. Active load output stage
  76. Power supply question
  77. EL34 Triode Mode - G3 where?
  78. Is "reforming" Electrolytic Capacitors necessary?
  79. Screen grid driver for PL519?
  80. Best replacment for a 6F2
  81. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  82. Pentode to Triode trick.
  83. 6550 making a Popping sound?
  84. Pie-eyed and puzzled...
  85. How about this schematic
  86. tube disorder
  87. PC choke in a preamp ?
  88. selective tone control
  89. time for a laugh
  90. Another New Build Pictures ( G' Amp )
  91. Help finding: 7-pin PCB socket, 90deg horizontal
  92. LC vs. CLC Theory
  93. Input transformer & volume pot
  94. MC34-B Quit working suddenly (newb)
  95. Golden Tube Audio 300B se
  96. Wanted: Pioneer sa-810 schematic
  97. se el34 finally
  98. Tube design question
  99. Marantz 8 clone build
  100. Active RIAA Eq for tubes- Brian Clark's article
  101. pre hums - even unplugged!
  102. Push Pull Preamplifier anybody?
  103. 6AN8 tube question
  104. Distortion in Fisher 800C
  105. 20% versus 43% screen tap
  106. Van der Veen transformers
  107. Want to upgrade Velleman K8020
  108. KT88 Power supply question
  109. TX coupled, pentode linestage
  110. phase splitter question
  111. New preamp project is online
  112. Newbie: Which amps to build?
  113. Which valve, 5842 (417A) or 6H30
  114. How do you punch out your chassis holes?
  115. recommend a 5Y3 based bass guitar amp?
  116. Help identifying tube tester
  117. paralelled tube
  118. ECC88 at 12 volts
  119. azarus preamplifier schematics
  120. Which valve amp do I keep?
  121. Favorite Driver for 845
  122. Somebody has that magazine?
  123. modify parallel push-pull EL84 to single push-pull
  124. How long it will last?
  125. Hurricane Wilma
  126. Suddenly, no output from Copland CTA-501
  127. 807 Audio Amp Progress Report
  128. Choke induced Hum
  129. Wim's DC EL84 amp
  130. Drivers for a KT88 pair
  131. what do u think of these tubes?
  132. 12BH7 spice 3f4 model
  133. Clone Marantz M7 Line Amp
  134. PIO caps question
  135. New Build Pics (guitar Amp)
  136. 6HF5 sweep tube single ended amp
  137. My first DIY
  138. Winding A Interstage Transformer
  139. help building 12ax7/el84 amp
  140. PSE schematic
  141. Using PSU Designer to calculate DC filament supply
  142. Dynaco stereo 70 driver board
  143. Excellent and cheap DIY INTERSTAGE!
  144. Need Advice with Timer Relay Shut Off
  145. standby switch
  146. Purpose of small cap across PSU rails?
  147. 6SL7 + EL34 SE Audio Amp
  148. guitar tube amp as home stereo
  149. 6C33 fixed/auto bias ?
  150. Long Tail and Local feedback
  151. I look for EAR 859 pictures.
  152. Designing a simple tube opamp?
  153. Difference between Hammond 200 and 300 series
  154. Ultrapath Cap
  155. where to find 600v 18awg wire??
  156. Suggested power supply B+?
  157. Variable Impedence Mic Preamp
  158. Help me stop my preamp from farting!
  159. Just bought some of those Russian paper/oil caps off of ebay
  160. The Valhalla power amplifier project
  161. help! EL84's dying
  162. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  163. ASC Polypropylene And Oil Capacitors
  164. pots... log or linear?
  165. Cracking sound through speakers.
  166. EL84-PP - Why just 5W?
  167. Brook12a schematics...
  168. LongTailedPair gain -> how to calculate?
  169. Wiring secondaries of two power trafo's in parallel?
  170. RIAA "Tube Simulations"
  171. Has anyone built this 'Svetlana Six Pack' ?
  172. updated pics of tube project
  173. help 12FV7 datasheet
  174. Why does my oversized preamp trafo gets much too hot?!?!?
  175. 6sn7 pre
  176. 12AY7/6SN7 preamp PSU check
  177. CT design trans application
  178. Shindo schematics?
  179. Octal Hagerman Cornet Experiences
  180. My first (guitar) amplifier
  181. Zenith AM/FM C835 tube Radio schematic
  182. Oh man, my telefunken stoops...
  183. 42 single ended
  184. EL34 Feedback circuit
  185. Spice model for EL86/6CW5
  186. Ditching some High Voltage
  187. Newbie want to build simple tube preamp&psu!need help!
  188. Phono Pre-Design Input
  189. HV Direct Drive tube amp.
  190. A question about Cathodyne/split load/concertina PI's
  191. Kofi Annan in: "Hummin' Trafo Blues"
  192. Rattling Tube
  193. Berning output buffer
  194. Tube PSU Question
  195. JoLida Envoy PreAmp or DIY?
  196. Looking for Audio Note P1SE schematics.
  197. Which SE-ECL82 amp to build?
  198. PSU Help
  199. Help for stabilisator Data
  200. How much ripple on B+ is allowed?
  201. Typical 2A3 hum?
  202. PV10 PS transformer
  203. 300B Filament Voltage Range
  204. Mullard EL34-Authenticity Verification
  205. Fading or Frying Fender Clone Issue
  206. Philips V30M amplifier
  207. PWM power supply???
  208. Regulated psu for tube preamp
  209. About to start a new project: PP 6CK4s...
  210. Komuro DC 300B crct w/ 50dht?
  211. Anyone out there try a SEPP OTL guitar amp??
  212. DIY speaker attenuator?
  213. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  214. Audio meet pics from this past weekend
  215. Audio Note M7 Line Preamp??
  216. PP 7591 amp
  217. Tube op amps
  218. Please tell me how to upgrade Music Angel KT88 amplifier?
  219. Do I want a fan?
  220. 3rd Aikido?
  221. More Questions about A.Wrights PP1C
  222. 7591s flashing on start-up?
  223. first amp build... wiring questions
  224. pentode aikido driver for 300b
  225. Question about single NOS triodes in cascode for fun
  226. oscillating PP EL84 amplifier
  227. 6H30P based cathode-follower schema kindly requested
  228. Cathode follower question
  229. Bunch of old parts, worth anything?
  230. 6922 vs. 6N1P Bass Response
  231. Behringer reaches a new high in tube "transparency"
  232. Input stage tube
  233. Using transformers as choke?
  234. Resistors
  235. melos gk1 preamps anybody?
  236. Looking for a thread...
  237. DG7-32 based oscillograph schematic needed
  238. Try!!! Ef37a + 6c33c
  239. qustion on tube grade wiring
  240. Balanced pre-amp attempt
  241. GRRR.. sanity check on PTx current please
  242. How do you measure ripple on the B+?
  243. Aikido + EL34 Integrated
  244. heater voltage: why ac, and not dc?
  245. Ideas for using one ECL82 in a preamp
  246. Question about 12AU7
  247. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  248. WIMA FKP1 1000V as coupling cap ??
  249. Ping amperex re: Hammond organs
  250. schematic needen variable power supply

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