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  1. Tube Swapping Question
  2. Toroid choke question
  3. Pentode CCS for parafeed SEP??
  4. subminiature tube suggestion
  5. MQ431 or Triode's DynaClone
  6. Conrad Johnson MV 45 schematic help
  7. signal wiring
  8. NEW B Need Help on Output Tx Problem
  9. center tap of heater winding
  10. Dynaco Mk IV question
  11. Does this tube amp has enough cap
  12. Acrosound TO-330 output transformers
  13. PP transformer for SE use
  14. Holiday Time!
  15. another beginers first amp thread!
  16. Western Electric 374A
  17. Musen to Jikken 03/1997
  18. Please help me make a schematic
  19. Tips for Hakko 936-12
  20. AC or DC for 300b Heaters
  21. Two irons for PSU
  22. Which DHT for Line stage?
  23. Pye Mozart 10 amplifier
  24. I need a simple schematic with 6J1P tubes
  25. First tube project. Need advice.
  26. Sound Valves M-40 assistance
  27. Has anyone been keeping up on the 'New Sensor' Controversy?
  28. quad esl output transformer.
  29. penta labs?
  30. transformer links
  31. EL84 auto split
  32. TOPWARD MODEL 605 operation manual & Schematic
  33. PREdator, Diff/CF linestage.
  34. Triode Electronics ??
  35. Full Bridge Amp?
  36. Tube literature on pentodes + transformers
  37. so, who made General Motor's "AUTRONIC EYE" tubes?
  38. 6DJ8 Linestage
  39. Annyone seen this problem?
  40. psu to heater on 4 el34 tubes???
  41. 6C33C-B, Reliability--A theory........
  42. Sun Audio preamps
  43. Anyone Use A Harmon/Kardon XT-2 Xformer For MC ?
  44. Carver Phono
  45. Help With 3 Channel Magnavox
  46. simulation software
  47. trickle charge psu?
  48. tube filter
  49. Holiday S-5 K-12G
  50. Couple of (newbie) tube questions...
  51. valve buffer gainclone
  52. Series wiring for heaters
  53. DIY tube cd player ?
  54. Tubes in mp3 players?
  55. Output Impedance?
  56. Hum Pot Question
  57. Which 6AQ5
  58. White flakes in rectifier tube??
  59. Bogen V20 PA Amp Schematic or ?
  60. 12a?7 in Eico HF-12
  61. Home Made Tubes?? has anyone made one, is it possible??
  62. replace 6N1P with 7308
  63. Plate choke on a line stage?
  64. Looking for datasheet
  65. 811A SET Monoblock physical layout suggestions
  66. Automated bias
  67. OTL or parafeed?
  68. Reversing mains toroids for HT
  69. 5881/6L6WGC and 12AT7WA replacement
  70. Direction for Mounting Transformers
  71. Ecf80
  72. feedback phasing
  73. Cryotubes? Cryogenically Frozen valves
  74. European Triode Festival 2005
  75. PSU capacitors
  76. Question on shared rectifier / signal tube filament windings
  77. Heathkit rebuild or...?
  78. Fisher 500B OPT/Feedback Questions
  79. Transformer selection question
  80. Grounded Grid Help
  81. EF86 penthode
  82. Any audio use for ER21A?
  83. Upgrading a sonic frontiers SFS-80
  84. Hum problem
  85. low frequency oscillation in 12B4 linestage
  86. Balanced volume control question
  87. Need Help for Power Supply for gg Preamp
  88. OTL 6c33c Ciufolli v8.2 low voltage rails
  89. Any way to extend OPT low-frequency response?
  90. RCA Phono Stage Redux
  91. About tube codes
  92. More Joules? Tube or Solid State PSU?
  93. EL34 schematic confusion
  94. 2-stage DHT: high-mu vs. interstage stepup
  95. Understanding this power supply
  96. 6V6G recommended schematic
  97. parallel CRC Filtering for B+
  98. 6v6. 6lg Gain Max Voltage
  99. More buffer questions
  100. Benchtop PS
  101. Chassis labels
  102. LM317 Regulator Problem
  103. Can I afford my SE amp ??
  104. 12B4 versus 6S4 for linestage
  105. Function Generator Probe?
  106. Otl Set?
  107. Tektronix TDS2000 series is a noisy scope
  108. vanderveen's 30W PP amp..
  109. Roberts/Akai M series amp problems
  110. What speaker to use with my tube clone
  111. What’s the best tube amplifier you can build?
  112. Cathode Follower Buffer Input Impedance
  113. EL84 as Preamp and as Crossover
  114. Wondering if Upcoming DIY design will work with Tubes? Cheap DIY Kits?
  115. EL 84 Single Ended Integrated
  116. "2 Stage" PP 7591 Amp
  117. Jolida 1301a with Mission M71 speakers?
  118. EL34 SE in 430V?
  119. EL 84 PPP/PP Class A Triode schematic
  120. Almarro A318A
  121. beckman berkley model 7360
  122. spice model for UL output transformer?
  123. Need help with my new amp
  124. E88CC Mullard fake
  125. Anyone try sharp cutoff pentodes in a p-p output stage?
  126. 845 A2 Monoblock Project
  127. newb needs help on simple el84 amp PS
  128. Newbie's power supply woes
  129. Question about M7 Preamp
  130. Which amp to DIY as a first project?
  131. help for psu
  132. tube amp
  133. Will a 6BH6 work in an Aikido?
  134. Tubes and maximum ratings
  135. FireFly Amp Question
  136. help needed 1st tube diy
  137. Help for newbie building Toccata preamp
  138. Hybrid amp -> tube for VAS stage
  139. I recently inherited a Heathkit HO-10 monitor o-scope...
  140. Aikido tube choice
  141. Biasing pre-amp problem
  142. Help with identifying tube
  143. Off Topic Holiday Cheer
  144. Prototype preamp example
  145. PV10AL Transformer burned, help!
  146. EL34 Pentode in Push-Pull!
  147. Mcintosh MX110 repair
  148. Mains Transformer Question
  149. Loaded Question
  150. A BIG SCRATCH in my speakers? Help me please.
  151. New Production Tung Sol 6550 Tubes - Opinions
  152. Looking to build a tube integrated
  153. Which high power CCS for output stage?
  154. Using a mosfet to drop B+?
  155. drawings vs. schematics
  156. New TEK Scopes
  157. Transfos Anyone?
  158. Ripple guidelines for power supplies
  159. Mains transformer orientation
  160. AMD tube integrated tube amp
  161. Using Choke in LCRC filter in power supply
  162. Need good current sink JFET or MOSFET?
  163. Setting Up a Circuit for Testing
  164. 6H6 question
  165. Kennedy Tube Audio Website Hijacked
  166. Yet another 12B4 line stage, or is the 12B4 better than the Grounded Grid.....
  167. transformer for Philips AG9015
  168. Real McTube Help
  169. Where are the 307A / VT225 amps?
  170. Anyone have a single el84 PPP OPT?
  171. Using an old power transformer as a choke?
  172. Convergent Audio Technology SL-1 Scematics
  173. Poinz 6AQ5 Linestage
  174. microphone preamp
  175. Ticking noise, need help.
  176. Humm in my preamp...
  177. Enclosure suggestion/questions
  178. Calculating Tube Parameters +SPICE
  179. Loudspeaker for TUBE DIYer
  180. Tube ID 18R-AL1?
  181. 6l6gc Tube Drive
  182. Need a little help, TT and PC? Amp Kit?
  183. 12ax7 preamp
  184. 308/ecll800 Lorenz
  185. How did you do your Aikido?
  186. Thoughts on this 807 design
  187. Rectifier compatibilty
  188. Tube amp for biamped speaker
  189. 12ae6, 12fk6, 12fm6 diode specs
  190. Any software out there for taking the headache out of composite loadlines?
  191. Driving a single 6L6GC with 12AX7
  192. quick 50c5 to play around with
  193. A question about distortion in SE vs. PP designs:
  194. Need help on first tube amp rebuild -trans problems
  195. HAMMOND 125ESE Transformer WIRING
  196. preamp ps problem
  197. What does everybody really NEED???
  198. Marantz 7C still good today?
  199. Magnavox Chassis #196-55 Resistor Question
  200. 6BL7
  201. altec/peerless mystery amp
  202. 6gk8 triode pentode tube data
  203. Low Current Source
  204. Parallel Single-Ended Questions
  205. Tube power ratings
  206. 6DJ8 or 12xx7 for hybrid amp (Monarchy)
  207. What did I do wrong with LEGACY????
  208. seeking: tube for a SEP parallel feed like an EL84, but with a lower Ra
  209. Tube Tracer
  210. a question of tube behaviour
  211. Which tube? ECC82, 6SN7 or 6SL7
  212. oscillator
  213. The Covi Mark II Circlotron Amp
  214. HT transformers and polarity
  215. Hammond 156C - good Plate choke load??
  216. DIY pre-amp kit vote
  217. 6550 tubes
  218. Is the 6N6P a direct substitute for the 5687?
  219. SE amp using 1619 instead of 45 triode
  220. Akai M-7 Amp Schematics?
  221. asl 845 monos mods
  222. 3 stages... Two Power Supplies
  223. RCA 7094 tetrodes...
  224. KT88 push pull
  225. Tube amp fan?
  226. Ping gerd.....
  227. Need help finding Sovtel EL84M tubes
  228. Min. current draw for choke input?
  229. Passive RIAA with tubes
  230. Oscillation Mystery
  231. unison research P30K schem?
  232. Can I use a 5R4 GY in place of a 5AR4?
  233. Seeking for all Norman H. Crowhurst papers
  234. best way to elevate heater?
  235. Tube Load Line
  236. Homemade Vacuum Tube
  237. beardm70mk2-want less b+
  238. Need help with tube test data - fast
  239. Show me a schema 6Pi3C-E Push-pull
  240. Help about the 6SN7/5692 linestage
  241. Active load output stage
  242. Power supply question
  243. EL34 Triode Mode - G3 where?
  244. Screen grid driver for PL519?
  245. Best replacment for a 6F2
  246. Please Tell Me How To Modify And Upgrade My Music Angle 845 Amplifier?
  247. Pentode to Triode trick.
  248. 6550 making a Popping sound?
  249. Pie-eyed and puzzled...
  250. How about this schematic

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