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  1. Music Man sixtyfive reverb head needs help!
  2. DIY pre-amp kit vote
  3. 6550 tubes
  4. Is the 6N6P a direct substitute for the 5687?
  5. SE amp using 1619 instead of 45 triode
  6. Akai M-7 Amp Schematics?
  7. asl 845 monos mods
  8. 3 stages... Two Power Supplies
  9. RCA 7094 tetrodes...
  10. KT88 push pull
  11. Tube amp fan?
  12. Ping gerd.....
  13. Need help finding Sovtel EL84M tubes
  14. Min. current draw for choke input?
  15. Passive RIAA with tubes
  16. Oscillation Mystery
  17. unison research P30K schem?
  18. Can I use a 5R4 GY in place of a 5AR4?
  19. Seeking for all Norman H. Crowhurst papers
  20. best way to elevate heater?
  21. Tube Load Line
  22. Homemade Vacuum Tube
  23. beardm70mk2-want less b+
  24. Need help with tube test data - fast
  25. Show me a schema 6Pi3C-E Push-pull
  26. Help about the 6SN7/5692 linestage
  27. Active load output stage
  28. Power supply question
  29. EL34 Triode Mode - G3 where?
  30. Is "reforming" Electrolytic Capacitors necessary?
  31. Screen grid driver for PL519?
  32. Best replacment for a 6F2
  33. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  34. Pentode to Triode trick.
  35. 6550 making a Popping sound?
  36. Pie-eyed and puzzled...
  37. How about this schematic
  38. tube disorder
  39. PC choke in a preamp ?
  40. selective tone control
  41. time for a laugh
  42. Another New Build Pictures ( G' Amp )
  43. Help finding: 7-pin PCB socket, 90deg horizontal
  44. LC vs. CLC Theory
  45. Input transformer & volume pot
  46. MC34-B Quit working suddenly (newb)
  47. Golden Tube Audio 300B se
  48. Wanted: Pioneer sa-810 schematic
  49. se el34 finally
  50. Tube design question
  51. Marantz 8 clone build
  52. Active RIAA Eq for tubes- Brian Clark's article
  53. pre hums - even unplugged!
  54. Push Pull Preamplifier anybody?
  55. 6AN8 tube question
  56. Distortion in Fisher 800C
  57. 20% versus 43% screen tap
  58. Van der Veen transformers
  59. Want to upgrade Velleman K8020
  60. KT88 Power supply question
  61. TX coupled, pentode linestage
  62. phase splitter question
  63. New preamp project is online
  64. Newbie: Which amps to build?
  65. Which valve, 5842 (417A) or 6H30
  66. How do you punch out your chassis holes?
  67. recommend a 5Y3 based bass guitar amp?
  68. Help identifying tube tester
  69. paralelled tube
  70. ECC88 at 12 volts
  71. azarus preamplifier schematics
  72. Which valve amp do I keep?
  73. Favorite Driver for 845
  74. Somebody has that magazine?
  75. modify parallel push-pull EL84 to single push-pull
  76. How long it will last?
  77. Hurricane Wilma
  78. Suddenly, no output from Copland CTA-501
  79. 807 Audio Amp Progress Report
  80. Choke induced Hum
  81. Wim's DC EL84 amp
  82. Drivers for a KT88 pair
  83. what do u think of these tubes?
  84. 12BH7 spice 3f4 model
  85. Clone Marantz M7 Line Amp
  86. PIO caps question
  87. New Build Pics (guitar Amp)
  88. 6HF5 sweep tube single ended amp
  89. My first DIY
  90. Winding A Interstage Transformer
  91. help building 12ax7/el84 amp
  92. PSE schematic
  93. Using PSU Designer to calculate DC filament supply
  94. Dynaco stereo 70 driver board
  95. Excellent and cheap DIY INTERSTAGE!
  96. Need Advice with Timer Relay Shut Off
  97. standby switch
  98. Purpose of small cap across PSU rails?
  99. 6SL7 + EL34 SE Audio Amp
  100. guitar tube amp as home stereo
  101. 6C33 fixed/auto bias ?
  102. Long Tail and Local feedback
  103. I look for EAR 859 pictures.
  104. Designing a simple tube opamp?
  105. Difference between Hammond 200 and 300 series
  106. Ultrapath Cap
  107. where to find 600v 18awg wire??
  108. Suggested power supply B+?
  109. Variable Impedence Mic Preamp
  110. Help me stop my preamp from farting!
  111. Just bought some of those Russian paper/oil caps off of ebay
  112. The Valhalla power amplifier project
  113. help! EL84's dying
  114. Could check this pentode-mu stage thingy for me (disclaimer* it is for a gutar amp)
  115. ASC Polypropylene And Oil Capacitors
  116. pots... log or linear?
  117. Cracking sound through speakers.
  118. EL84-PP - Why just 5W?
  119. Brook12a schematics...
  120. LongTailedPair gain -> how to calculate?
  121. Wiring secondaries of two power trafo's in parallel?
  122. RIAA "Tube Simulations"
  123. Has anyone built this 'Svetlana Six Pack' ?
  124. updated pics of tube project
  125. help 12FV7 datasheet
  126. Why does my oversized preamp trafo gets much too hot?!?!?
  127. 6sn7 pre
  128. 12AY7/6SN7 preamp PSU check
  129. CT design trans application
  130. Shindo schematics?
  131. Octal Hagerman Cornet Experiences
  132. My first (guitar) amplifier
  133. Zenith AM/FM C835 tube Radio schematic
  134. Oh man, my telefunken stoops...
  135. 42 single ended
  136. EL34 Feedback circuit
  137. Spice model for EL86/6CW5
  138. Ditching some High Voltage
  139. Newbie want to build simple tube preamp&psu!need help!
  140. Phono Pre-Design Input
  141. HV Direct Drive tube amp.
  142. A question about Cathodyne/split load/concertina PI's
  143. Kofi Annan in: "Hummin' Trafo Blues"
  144. Rattling Tube
  145. Berning output buffer
  146. Tube PSU Question
  147. JoLida Envoy PreAmp or DIY?
  148. Looking for Audio Note P1SE schematics.
  149. Which SE-ECL82 amp to build?
  150. PSU Help
  151. Help for stabilisator Data
  152. How much ripple on B+ is allowed?
  153. Typical 2A3 hum?
  154. PV10 PS transformer
  155. 300B Filament Voltage Range
  156. Mullard EL34-Authenticity Verification
  157. Fading or Frying Fender Clone Issue
  158. Philips V30M amplifier
  159. PWM power supply???
  160. Regulated psu for tube preamp
  161. About to start a new project: PP 6CK4s...
  162. Komuro DC 300B crct w/ 50dht?
  163. Anyone out there try a SEPP OTL guitar amp??
  164. DIY speaker attenuator?
  165. So what are some good 7-pin, hi mu, low noise/microphonic tubes??
  166. Audio meet pics from this past weekend
  167. Audio Note M7 Line Preamp??
  168. PP 7591 amp
  169. Tube op amps
  170. Please tell me how to upgrade Music Angel KT88 amplifier?
  171. Do I want a fan?
  172. 3rd Aikido?
  173. More Questions about A.Wrights PP1C
  174. 7591s flashing on start-up?
  175. first amp build... wiring questions
  176. pentode aikido driver for 300b
  177. Question about single NOS triodes in cascode for fun
  178. oscillating PP EL84 amplifier
  179. 6H30P based cathode-follower schema kindly requested
  180. Cathode follower question
  181. Bunch of old parts, worth anything?
  182. 6922 vs. 6N1P Bass Response
  183. Behringer reaches a new high in tube "transparency"
  184. Input stage tube
  185. Using transformers as choke?
  186. Resistors
  187. melos gk1 preamps anybody?
  188. Looking for a thread...
  189. DG7-32 based oscillograph schematic needed
  190. Try!!! Ef37a + 6c33c
  191. qustion on tube grade wiring
  192. Balanced pre-amp attempt
  193. GRRR.. sanity check on PTx current please
  194. How do you measure ripple on the B+?
  195. Aikido + EL34 Integrated
  196. heater voltage: why ac, and not dc?
  197. Ideas for using one ECL82 in a preamp
  198. Question about 12AU7
  199. 6AU6, 6U8, 6CL6, plus UTC A-10 make Mic Pre?
  200. WIMA FKP1 1000V as coupling cap ??
  201. Ping amperex re: Hammond organs
  202. schematic needen variable power supply
  203. Distributed Load/Balanced Bridge Connection
  204. CCS, feedback and grid leak questions.
  205. Vdd
  206. Help with 6GW8/ECL86 tubes??
  207. Best amplifier (recomendations) for Fostex FE108ez?
  208. Quick valve construction question
  209. Poindexter's 6v6 PP amp
  210. need some help with Ohm's law-fast!
  211. hybrid rectifier question
  212. I really, really wish I hadn't done that...
  213. Quicksilver 8417 conversion
  214. Supratek
  215. remote OPT, stupid idea ?
  216. Autoformer output stage
  217. Remote Power Supply: A Stupid Idea?
  218. Rjm simple tube phono pre
  219. Voltage controlled filter with tubes ??
  220. Does this look right to you?
  221. PWM amplifier hooked onto a tube preamp
  222. Zenith Console Opt Question, Odd Secondary
  223. Marchand LN108 Tube Phono Preamp
  224. Anyone care to express an opinion on this output Transformer
  225. 6L6 Triode strapped amp suggestions
  226. 6F1 and 6P2 Equivalents
  227. in memoriam Fred N. AKA 807
  228. Perplexed by 5AR4 Tube Socket? Picture Included
  229. Push pull 300B and more than a few questions...
  230. First tube project.
  231. DHT learning
  232. how do i add adjustable bias on amp?
  233. Tube tester: Accurate Instruments Model 157
  234. "El Cheapo Valve Phono" using 6ER5=>12AT7WC?
  235. Design Questions
  236. SRPP + Gainclone
  237. dht p-p filament question
  238. Report - 2005 London HiFi Show
  239. Want to build hi - power amp
  240. Gibson Skylark Grouding Questions
  241. Can I mod this circuit to use 6922 tubes?
  242. tube preamp kit question (again?)
  243. 3f4 spice models needed
  244. Back to Back transformers to get +B of 200V ??
  245. New amp project-some ideas of my own and looking for input from others...
  246. Emphasising the transients, but making the mediocre listenable
  247. Looking For a PP 6Y6GA Design
  248. Industrial vs Commercial amps and OPT's
  249. ECC99 operating points?
  250. Preamp suggestions for a tube newbie

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