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  1. sears silvertone medalist stereo amp schematic needed
  2. Led bias on powertubes?
  3. Thermal Runaway
  4. Going from zero to pro tube amplifier. Resources?
  5. DIY Novar Socket
  6. Hum pickup from line output transformers
  7. Photo of a JJ 300B Filaments!! Please! :)
  8. Super FU-29
  9. Questions about Tim Mellow 6C33C OTL
  10. James or Silk for EL36SE?
  11. Dead KT88
  12. MS 110B KT88 INTEGRATED AMPLIFIER
  13. The Mighty 6550...
  14. recomend me some EL34 PLEASE
  15. Adding tone controls
  16. TJ Full Music 2A3/CNE
  17. groove tubes for headphone amp
  18. Soviet 6p3s/6p3s-e
  19. A case of direct coupled cathode follower
  20. SE45 schematic monoblock to stereo help
  21. 211 tube amp problem Help
  22. Department of inapprehensible schematics
  23. How low can you go...?
  24. EL34/6L6 Screen reistors...
  25. 809, anyone played around with them?
  26. Skinny OTL
  27. Adjust drive and output level with one knob
  28. Help me rack some Gates Program Amps
  29. Switch Mode Heater Supply
  30. Pre Ampje
  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. Optimum load impedance for PCL85?
  65. Croatian triode Festival 2014.
  66. vacuum tube score.. what to do with
  67. Webcor ceramic phono input circuitry suggestions?
  68. Position of OPT windings
  69. sd2 seven pin??
  70. Help design a Small 250VDC PSU for tube preamp
  71. Bright Driver Tubes 12AU7, 12BH7, 5814...
  72. Question about using tube socket center hole for star ground
  73. Heathkit UA-2 clone project
  74. Latest on the RH amps..
  75. Transformer design program
  76. 807 "Musicians Amplifier" help
  77. J.E. LABS PP2A3 POWER SUPPLY ?
  78. Mono Block Building Project
  79. EL34 CCS ideas
  80. Magnavox 8601-20
  81. wood/metal vs all-metal chassis
  82. Design data on dry battery tubes
  83. Differential tube with a gain stage 1178
  84. 6C4C tube ...Good to buy ?
  85. Including a C- winding on a filament transformer
  86. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  87. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  88. Tube Socket ID
  89. JJ 5Y3S is too tall...need smaller tube
  90. Uniamp 2A3
  91. buzz noise from paraphase circuit
  92. Benefits of Enhanced Triode Connection
  93. Working out a valves load resistance?
  94. 813 Alternatives
  95. Help 6N6T pinout
  96. Very large parafeed cap
  97. Bright purple flash 6N1P
  98. Harman Kardon Citation II - rebuild questions
  99. Stoetkit junior mk2
  100. 1619 Push pull output stage
  101. Tube getter
  102. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  103. Audible Illusions and 6922
  104. quick access tube amp protection
  105. Identifying Genalex KT66 matched pair question
  106. Hunting 100Hz noise in SRPP+ stage
  107. JJ ECC83S Biasing conditions
  108. Audiophiletalk - Dirt Cheap SE
  109. 12AL8 Head-Amp with UTC Output Transformer
  110. SET monoblocks?
  111. EL84 Push Pull design from left over parts
  112. Strange UL Transformers
  113. Stabilization balanced currents in the PP stage.
  114. Current mirror stage in PP
  115. EL34 SE ultralinear schematic
  116. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  117. Toroid Power Transformer For GM-70 845 211 1000V
  118. Building the "Crystal Palace" Amp
  119. Upgrading OPTs in production amp? (Yaquin MC-10L)
  120. any good Triode 6H8C preamp schematics out there???
  121. pushpull 6aq5 distortion
  122. Mr. Lian 845 SET more kit rather than commercial product.
  123. Opinion for otl ocl headphone amp
  124. Tube-newby wanting to make a good tube amp
  125. Anyone used a voltage tripler PS?
  126. Audioromy 828A / FU-29 tube layout
  127. Choosing Cathode Bypass Capacitor
  128. Ground loop gremlins
  129. Crackling Amp after Accident
  130. New CCS/ depletion mode MOSFETs available... experience anyone?
  131. Mengyue Mini
  132. Parafeed quest
  133. Determining linearity - differential gain stage
  134. 6HB6 - Any pratical experience?
  135. 27 Tube Preamp design questions
  136. Output Transformers Mount Position
  137. Critique please: Fixed bias 7591 SE
  138. Coupling Cap Improvements?
  139. RL 12T 15
  140. Tube instead of anode resistor
  141. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  142. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  143. Hf31 fidelity valve type
  144. Design of transformers for valve amplifiers.Part2
  145. Harman Kardon ta5000X alignment/manual
  146. Help with an analog meter hack
  147. dirkwright phono
  148. Zener Voltage Regulator
  149. Fisher X-101-B Substitute for 7591
  150. UNU-pnono riaa mm preamp
  151. My old amps
  152. Switching regulator on Kickstarter
  153. my yaqin 100b will not bias on v1 v3
  154. Zenith model B835R
  155. Want to build 2a3 amp for old radio
  156. Preamp Advice
  157. simple 5687 pre amp help
  158. Pulling TV From 61 Maggie Imperial Console?
  159. I can buy some 6U9's cheap - are they any good, and what could I build?
  160. K8011/K8010 PCB build thread
  161. Choosing an op point when using a tube 'off label'
  162. Choke inputs
  163. Unbalanced In > Balanced Out line amp - How To Do It?
  164. 6146b output transformer. I'm new and I need help.
  165. Your first DiY Low Cost/Low Voltage tube AMP
  166. Need some advice on OPT for kt88/6l6
  167. 1:1:1 transformers
  168. Output transformer in the cathode?
  169. Popping DC
  170. Power transformer wiring issues
  171. easy question - Magnavox 86-01 owners...
  172. What's the Best Way to Reduce Gain in a Preamp
  173. safety with high voltage input capacitor ?
  174. SE EL84 amp - reducing 100Hz hum
  175. Photos of large DHT preamps? (Or large amps in general)
  176. Minimum pin length (noval)
  177. Biasing of KT120
  178. SE to balanced transformer
  179. Decoupling Cap value - How Much?
  180. Cathode bypass Cap vs. No Bypass Cap
  181. Interesting circuit I thought.
  182. Yet another K12G thread
  183. 6N3 tube preamp question
  184. Driver vs Power tube
  185. Help in Bias tube amp for Adis Devy 7
  186. Tubes and HT
  187. HiFiMan EF-2A schematic sought
  188. Please, help with a WE91 project on behalf of a friend
  189. Proposed Headphone Amp Overhaul?
  190. protection of downstream line amp
  191. Is the 6E6P suitable for audio?
  192. me clone proto EL/PL 504
  193. Improving headphone amplifier
  194. 5902 LSTPICE Model
  195. Canary CA-301 PSU
  196. 3B28 oscilator
  197. A lot of schematics
  198. V8 amp
  199. market by Jac music
  200. 6P3C-1 SE ? .
  201. Cary slp70: Worth to upgrade?
  202. Adding NFB makes headphone amp sound AWFUL!!!
  203. Filaments hard wired to B+ on EZ81 base
  204. What the bird is OS 18/600?
  205. ccs 10m90s what is wrong?
  206. Topology for balanced preamp
  207. 6v6 vs. 6l6 vs. 807 soundwise..
  208. Opinions/Advice on Triode Strap method
  209. Something like a Miniwatt N3 or APPJ PA0901A
  210. Extraordinary harmonics. Type 47 # tube amp.
  211. Made a new tube amp, 6J5 +27 +45
  212. Anyone ever play around with a GU-72?
  213. Possibility of using a UTC LMI-500 transformer...
  214. Aikido transformer
  215. Can someone explain why you need to re-adjust the balance on a tube amp every time
  216. Which factory made these tubes ?
  217. 813 and gm70
  218. 13E1 Push Pull
  219. dump find.
  220. ...6SN7GT operating points tube help.......
  221. 6L6 6SJ7 Amp please pick faults if any
  222. Updated DIY EL34B 6SJ7 SE Amp
  223. 6C18 x 6C33
  224. Vintage tube amp find
  225. any benefit to screen-grid drive a 6V6?
  226. Brown face Scott LK72
  227. Pilot 1060 integrated - make it better!
  228. Should I ground my K12G or my Bugle 2?
  229. 6c33 amp convert to 6c41
  230. STA-LEVEL thumbs problem
  231. Amp motorboating at power up
  232. Spice models for AL4 and RS242 tubes
  233. Mains Switch
  234. Suggestions for big output stage needed
  235. Very Good (or best?) 12B4 schematic?
  236. Amplifier for active bookshelf speakers
  237. Olson AM-240 schematic needed
  238. Valve amp - maintenance
  239. Your opinion about Rotel 930AX to hyrbid mod
  240. Tube circuit sim software for free?
  241. 6v6 family tubes
  242. Troublesome bias resistor, cathodyne stage
  243. 6AQ5 excellent for line stage?
  244. Datasheet 6P42s and 6P45C
  245. Quad / Cyrus impedance matching
  246. Zobel network at primary audio trafo?
  247. ECL86 question
  248. 500c buzzing power transformer
  249. LM4702+6L6GB/807
  250. Finally started on my 6L6 amp. Need tube suggestions.

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