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

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