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  1. Going from zero to pro tube amplifier. Resources?
  2. DIY Novar Socket
  3. Hum pickup from line output transformers
  4. Photo of a JJ 300B Filaments!! Please! :)
  5. Super FU-29
  6. Questions about Tim Mellow 6C33C OTL
  7. James or Silk for EL36SE?
  8. Dead KT88
  9. MS 110B KT88 INTEGRATED AMPLIFIER
  10. The Mighty 6550...
  11. recomend me some EL34 PLEASE
  12. Adding tone controls
  13. TJ Full Music 2A3/CNE
  14. groove tubes for headphone amp
  15. IXYS LTSpice Models (or something equivalent?)
  16. Soviet 6p3s/6p3s-e
  17. A case of direct coupled cathode follower
  18. SE45 schematic monoblock to stereo help
  19. Heathkit Schematics & Manuals
  20. 211 tube amp problem Help
  21. Department of inapprehensible schematics
  22. How low can you go...?
  23. EL34/6L6 Screen reistors...
  24. 809, anyone played around with them?
  25. Skinny OTL
  26. Adjust drive and output level with one knob
  27. Help me rack some Gates Program Amps
  28. Switch Mode Heater Supply
  29. Pre Ampje
  30. Maida Regulator Digital Control
  31. Worried by 110v reading on 6.3v tap....
  32. Safety Alert - UK Yaqin users
  33. 27> EL34 (triode) > 300B
  34. Rockola juke box amp - unusual features
  35. 3.5 watt ECL82 Amp
  36. 12BH7 Headphone Amp
  37. White Cathode Follower Quandary
  38. help in aikido for sennheiser hd580
  39. Home brew more economical than an ST-35
  40. Modeling Pull-Push transformer in LTspice
  41. The Fisher 400-C "Fixer-upper"
  42. Power Transformer question/concern
  43. Nice little schematic drawing app w/ tube symbols
  44. best budget diy kit?
  45. Transconductance amplifier for headphones.
  46. El Cheapo information?
  47. Aikido 9-Pin Configuration
  48. Strange motorboating issue
  49. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  50. Substituting higher wattage resistors
  51. cap coupling to interstage transformer or direct coupling?
  52. A question of feedback..
  53. Two Monoblocks "Dying" Within Days Of Each Other
  54. Russian 1Zh24B Pentods / design assistance.
  55. What Tubes for 5.8k PP transformers
  56. Problem with a power transformer.
  57. 300B OTL Preamp/Headphone Amp
  58. tantalum resistors
  59. 6BM8 in STC mode
  60. My Moscode again: What is the bias current?
  61. OTL WCF headphone amp build + awesome prototype material
  62. Type 42 single ended ideas
  63. Help with my Moscode 300 amp
  64. Thoughts on this volume potentiometer?
  65. Optimum load impedance for PCL85?
  66. Croatian triode Festival 2014.
  67. Old ekco tv transformers
  68. vacuum tube score.. what to do with
  69. Valve based disco mixer.
  70. Webcor ceramic phono input circuitry suggestions?
  71. Position of OPT windings
  72. sd2 seven pin??
  73. Help design a Small 250VDC PSU for tube preamp
  74. Bright Driver Tubes 12AU7, 12BH7, 5814...
  75. Question about using tube socket center hole for star ground
  76. Heathkit UA-2 clone project
  77. Schematic CAD Program
  78. Latest on the RH amps..
  79. Transformer design program
  80. 807 "Musicians Amplifier" help
  81. J.E. LABS PP2A3 POWER SUPPLY ?
  82. Mono Block Building Project
  83. EL34 CCS ideas
  84. Magnavox 8601-20
  85. wood/metal vs all-metal chassis
  86. Design data on dry battery tubes
  87. Differential tube with a gain stage 1178
  88. 6C4C tube ...Good to buy ?
  89. Including a C- winding on a filament transformer
  90. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  91. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  92. Electrolytic cap question
  93. Tube Socket ID
  94. JJ 5Y3S is too tall...need smaller tube
  95. Uniamp 2A3
  96. buzz noise from paraphase circuit
  97. Benefits of Enhanced Triode Connection
  98. Working out a valves load resistance?
  99. 813 Alternatives
  100. Help 6N6T pinout
  101. Very large parafeed cap
  102. Bright purple flash 6N1P
  103. Harman Kardon Citation II - rebuild questions
  104. Stoetkit junior mk2
  105. 1619 Push pull output stage
  106. Tube getter
  107. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  108. Audible Illusions and 6922
  109. quick access tube amp protection
  110. Identifying Genalex KT66 matched pair question
  111. Hunting 100Hz noise in SRPP+ stage
  112. JJ ECC83S Biasing conditions
  113. Audiophiletalk - Dirt Cheap SE
  114. 12AL8 Head-Amp with UTC Output Transformer
  115. SET monoblocks?
  116. EL84 Push Pull design from left over parts
  117. Strange UL Transformers
  118. Stabilization balanced currents in the PP stage.
  119. Current mirror stage in PP
  120. EL34 SE ultralinear schematic
  121. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  122. Toroid Power Transformer For GM-70 845 211 1000V
  123. Building the "Crystal Palace" Amp
  124. Improved Sound Card Interface - Ideas and Suggestions?
  125. Upgrading OPTs in production amp? (Yaquin MC-10L)
  126. any good Triode 6H8C preamp schematics out there???
  127. pushpull 6aq5 distortion
  128. Mr. Lian 845 SET more kit rather than commercial product.
  129. Opinion for otl ocl headphone amp
  130. Tube-newby wanting to make a good tube amp
  131. Anyone used a voltage tripler PS?
  132. Audioromy 828A / FU-29 tube layout
  133. Choosing Cathode Bypass Capacitor
  134. Ground loop gremlins
  135. Crackling Amp after Accident
  136. New CCS/ depletion mode MOSFETs available... experience anyone?
  137. Mengyue Mini
  138. Parafeed quest
  139. Determining linearity - differential gain stage
  140. 6HB6 - Any pratical experience?
  141. 27 Tube Preamp design questions
  142. Output Transformers Mount Position
  143. Critique please: Fixed bias 7591 SE
  144. Coupling Cap Improvements?
  145. RL 12T 15
  146. Tube instead of anode resistor
  147. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  148. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  149. Hf31 fidelity valve type
  150. Design of transformers for valve amplifiers.Part2
  151. Harman Kardon ta5000X alignment/manual
  152. Help with an analog meter hack
  153. dirkwright phono
  154. Zener Voltage Regulator
  155. Fisher X-101-B Substitute for 7591
  156. UNU-pnono riaa mm preamp
  157. My old amps
  158. Switching regulator on Kickstarter
  159. my yaqin 100b will not bias on v1 v3
  160. Zenith model B835R
  161. Want to build 2a3 amp for old radio
  162. Preamp Advice
  163. simple 5687 pre amp help
  164. Pulling TV From 61 Maggie Imperial Console?
  165. I can buy some 6U9's cheap - are they any good, and what could I build?
  166. K8011/K8010 PCB build thread
  167. Choosing an op point when using a tube 'off label'
  168. Choke inputs
  169. Unbalanced In > Balanced Out line amp - How To Do It?
  170. 6146b output transformer. I'm new and I need help.
  171. Your first DiY Low Cost/Low Voltage tube AMP
  172. Need some advice on OPT for kt88/6l6
  173. 1:1:1 transformers
  174. Output transformer in the cathode?
  175. Popping DC
  176. Power transformer wiring issues
  177. easy question - Magnavox 86-01 owners...
  178. Mic preamp input transformer alternative?
  179. What's the Best Way to Reduce Gain in a Preamp
  180. safety with high voltage input capacitor ?
  181. SE EL84 amp - reducing 100Hz hum
  182. Photos of large DHT preamps? (Or large amps in general)
  183. Minimum pin length (noval)
  184. Biasing of KT120
  185. SE to balanced transformer
  186. Decoupling Cap value - How Much?
  187. Cathode bypass Cap vs. No Bypass Cap
  188. Interesting circuit I thought.
  189. Yet another K12G thread
  190. 6N3 tube preamp question
  191. Driver vs Power tube
  192. Help in Bias tube amp for Adis Devy 7
  193. Tubes and HT
  194. HiFiMan EF-2A schematic sought
  195. Please, help with a WE91 project on behalf of a friend
  196. Proposed Headphone Amp Overhaul?
  197. protection of downstream line amp
  198. Is the 6E6P suitable for audio?
  199. me clone proto EL/PL 504
  200. Improving headphone amplifier
  201. 5902 LSTPICE Model
  202. Canary CA-301 PSU
  203. 3B28 oscilator
  204. A lot of schematics
  205. V8 amp
  206. market by Jac music
  207. 6P3C-1 SE ? .
  208. Cary slp70: Worth to upgrade?
  209. Hickok 123B tube tester
  210. Adding NFB makes headphone amp sound AWFUL!!!
  211. Filaments hard wired to B+ on EZ81 base
  212. What the bird is OS 18/600?
  213. ccs 10m90s what is wrong?
  214. Topology for balanced preamp
  215. 6v6 vs. 6l6 vs. 807 soundwise..
  216. Opinions/Advice on Triode Strap method
  217. Something like a Miniwatt N3 or APPJ PA0901A
  218. Extraordinary harmonics. Type 47 # tube amp.
  219. Made a new tube amp, 6J5 +27 +45
  220. Anyone ever play around with a GU-72?
  221. Possibility of using a UTC LMI-500 transformer...
  222. Aikido transformer
  223. Can someone explain why you need to re-adjust the balance on a tube amp every time
  224. Which factory made these tubes ?
  225. 813 and gm70
  226. 13E1 Push Pull
  227. dump find.
  228. ...6SN7GT operating points tube help.......
  229. 6L6 6SJ7 Amp please pick faults if any
  230. Updated DIY EL34B 6SJ7 SE Amp
  231. 6C18 x 6C33
  232. Vintage tube amp find
  233. any benefit to screen-grid drive a 6V6?
  234. Brown face Scott LK72
  235. Pilot 1060 integrated - make it better!
  236. Should I ground my K12G or my Bugle 2?
  237. 6c33 amp convert to 6c41
  238. STA-LEVEL thumbs problem
  239. Amp motorboating at power up
  240. Spice models for AL4 and RS242 tubes
  241. Mains Switch
  242. Suggestions for big output stage needed
  243. Very Good (or best?) 12B4 schematic?
  244. Amplifier for active bookshelf speakers
  245. Olson AM-240 schematic needed
  246. Valve amp - maintenance
  247. Your opinion about Rotel 930AX to hyrbid mod
  248. Weston Tube Tester 774-5
  249. Tube circuit sim software for free?
  250. 6v6 family tubes

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