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  1. Tube Heater Question
  2. No not Again...Aikido Plate dissipation question
  3. RH amp question!
  4. Mullard 5-20 power supply
  5. b&k 500 tube chart question
  6. Combining two single-ended tube stages for XLR-output - Question
  7. Scope pattern
  8. Diode cathode bias?
  9. Contact Enhancers/Corrosion Inhibitors for Aluminum
  10. My SE 46 tube monoblocks project
  11. E88CC / 6922 Datasheet Limiting Values
  12. Fisher Power Transformers
  13. does someone know about this russia amplifier ?
  14. How to improve this 6B4G push-pull circuit
  15. EL34 UL PP Transformer
  16. sears silvertone medalist stereo amp schematic needed
  17. Led bias on powertubes?
  18. Thermal Runaway
  19. Going from zero to pro tube amplifier. Resources?
  20. DIY Novar Socket
  21. Hum pickup from line output transformers
  22. Photo of a JJ 300B Filaments!! Please! :)
  23. Super FU-29
  24. Questions about Tim Mellow 6C33C OTL
  25. James or Silk for EL36SE?
  26. Dead KT88
  27. MS 110B KT88 INTEGRATED AMPLIFIER
  28. The Mighty 6550...
  29. recomend me some EL34 PLEASE
  30. Adding tone controls
  31. TJ Full Music 2A3/CNE
  32. groove tubes for headphone amp
  33. IXYS LTSpice Models (or something equivalent?)
  34. Soviet 6p3s/6p3s-e
  35. A case of direct coupled cathode follower
  36. SE45 schematic monoblock to stereo help
  37. Heathkit Schematics & Manuals
  38. 211 tube amp problem Help
  39. Department of inapprehensible schematics
  40. How low can you go...?
  41. EL34/6L6 Screen reistors...
  42. 809, anyone played around with them?
  43. Skinny OTL
  44. Adjust drive and output level with one knob
  45. Help me rack some Gates Program Amps
  46. Switch Mode Heater Supply
  47. Pre Ampje
  48. Maida Regulator Digital Control
  49. Worried by 110v reading on 6.3v tap....
  50. Safety Alert - UK Yaqin users
  51. 27> EL34 (triode) > 300B
  52. Rockola juke box amp - unusual features
  53. 3.5 watt ECL82 Amp
  54. 12BH7 Headphone Amp
  55. White Cathode Follower Quandary
  56. help in aikido for sennheiser hd580
  57. Home brew more economical than an ST-35
  58. Modeling Pull-Push transformer in LTspice
  59. The Fisher 400-C "Fixer-upper"
  60. Power Transformer question/concern
  61. Nice little schematic drawing app w/ tube symbols
  62. best budget diy kit?
  63. Transconductance amplifier for headphones.
  64. El Cheapo information?
  65. Aikido 9-Pin Configuration
  66. Strange motorboating issue
  67. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  68. Substituting higher wattage resistors
  69. cap coupling to interstage transformer or direct coupling?
  70. A question of feedback..
  71. Two Monoblocks "Dying" Within Days Of Each Other
  72. Russian 1Zh24B Pentods / design assistance.
  73. What Tubes for 5.8k PP transformers
  74. Problem with a power transformer.
  75. 300B OTL Preamp/Headphone Amp
  76. tantalum resistors
  77. 6BM8 in STC mode
  78. My Moscode again: What is the bias current?
  79. OTL WCF headphone amp build + awesome prototype material
  80. Type 42 single ended ideas
  81. Help with my Moscode 300 amp
  82. Optimum load impedance for PCL85?
  83. Croatian triode Festival 2014.
  84. vacuum tube score.. what to do with
  85. Valve based disco mixer.
  86. Webcor ceramic phono input circuitry suggestions?
  87. Position of OPT windings
  88. sd2 seven pin??
  89. Help design a Small 250VDC PSU for tube preamp
  90. Bright Driver Tubes 12AU7, 12BH7, 5814...
  91. Question about using tube socket center hole for star ground
  92. Heathkit UA-2 clone project
  93. Latest on the RH amps..
  94. Transformer design program
  95. 807 "Musicians Amplifier" help
  96. J.E. LABS PP2A3 POWER SUPPLY ?
  97. Mono Block Building Project
  98. EL34 CCS ideas
  99. Magnavox 8601-20
  100. wood/metal vs all-metal chassis
  101. Design data on dry battery tubes
  102. Differential tube with a gain stage 1178
  103. 6C4C tube ...Good to buy ?
  104. Including a C- winding on a filament transformer
  105. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  106. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  107. Tube Socket ID
  108. JJ 5Y3S is too tall...need smaller tube
  109. Uniamp 2A3
  110. buzz noise from paraphase circuit
  111. Benefits of Enhanced Triode Connection
  112. Working out a valves load resistance?
  113. 813 Alternatives
  114. Help 6N6T pinout
  115. Very large parafeed cap
  116. Bright purple flash 6N1P
  117. Harman Kardon Citation II - rebuild questions
  118. Stoetkit junior mk2
  119. 1619 Push pull output stage
  120. Tube getter
  121. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  122. Audible Illusions and 6922
  123. quick access tube amp protection
  124. Identifying Genalex KT66 matched pair question
  125. Hunting 100Hz noise in SRPP+ stage
  126. JJ ECC83S Biasing conditions
  127. Audiophiletalk - Dirt Cheap SE
  128. 12AL8 Head-Amp with UTC Output Transformer
  129. SET monoblocks?
  130. EL84 Push Pull design from left over parts
  131. Strange UL Transformers
  132. Stabilization balanced currents in the PP stage.
  133. Current mirror stage in PP
  134. EL34 SE ultralinear schematic
  135. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  136. Toroid Power Transformer For GM-70 845 211 1000V
  137. Building the "Crystal Palace" Amp
  138. Upgrading OPTs in production amp? (Yaquin MC-10L)
  139. any good Triode 6H8C preamp schematics out there???
  140. pushpull 6aq5 distortion
  141. Mr. Lian 845 SET more kit rather than commercial product.
  142. Opinion for otl ocl headphone amp
  143. Tube-newby wanting to make a good tube amp
  144. Anyone used a voltage tripler PS?
  145. Audioromy 828A / FU-29 tube layout
  146. Choosing Cathode Bypass Capacitor
  147. Ground loop gremlins
  148. Crackling Amp after Accident
  149. New CCS/ depletion mode MOSFETs available... experience anyone?
  150. Mengyue Mini
  151. Parafeed quest
  152. Determining linearity - differential gain stage
  153. 6HB6 - Any pratical experience?
  154. 27 Tube Preamp design questions
  155. Output Transformers Mount Position
  156. Critique please: Fixed bias 7591 SE
  157. Coupling Cap Improvements?
  158. RL 12T 15
  159. Tube instead of anode resistor
  160. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  161. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  162. Hf31 fidelity valve type
  163. Design of transformers for valve amplifiers.Part2
  164. Harman Kardon ta5000X alignment/manual
  165. Help with an analog meter hack
  166. dirkwright phono
  167. Zener Voltage Regulator
  168. Fisher X-101-B Substitute for 7591
  169. UNU-pnono riaa mm preamp
  170. My old amps
  171. Switching regulator on Kickstarter
  172. my yaqin 100b will not bias on v1 v3
  173. Zenith model B835R
  174. Want to build 2a3 amp for old radio
  175. Preamp Advice
  176. simple 5687 pre amp help
  177. Pulling TV From 61 Maggie Imperial Console?
  178. I can buy some 6U9's cheap - are they any good, and what could I build?
  179. K8011/K8010 PCB build thread
  180. Choosing an op point when using a tube 'off label'
  181. Choke inputs
  182. Unbalanced In > Balanced Out line amp - How To Do It?
  183. 6146b output transformer. I'm new and I need help.
  184. Your first DiY Low Cost/Low Voltage tube AMP
  185. Need some advice on OPT for kt88/6l6
  186. 1:1:1 transformers
  187. Output transformer in the cathode?
  188. Popping DC
  189. Power transformer wiring issues
  190. easy question - Magnavox 86-01 owners...
  191. Mic preamp input transformer alternative?
  192. What's the Best Way to Reduce Gain in a Preamp
  193. safety with high voltage input capacitor ?
  194. SE EL84 amp - reducing 100Hz hum
  195. Photos of large DHT preamps? (Or large amps in general)
  196. Minimum pin length (noval)
  197. Biasing of KT120
  198. SE to balanced transformer
  199. Decoupling Cap value - How Much?
  200. Cathode bypass Cap vs. No Bypass Cap
  201. Interesting circuit I thought.
  202. Yet another K12G thread
  203. 6N3 tube preamp question
  204. Driver vs Power tube
  205. Help in Bias tube amp for Adis Devy 7
  206. Tubes and HT
  207. HiFiMan EF-2A schematic sought
  208. Please, help with a WE91 project on behalf of a friend
  209. Proposed Headphone Amp Overhaul?
  210. protection of downstream line amp
  211. Is the 6E6P suitable for audio?
  212. me clone proto EL/PL 504
  213. Improving headphone amplifier
  214. 5902 LSTPICE Model
  215. Canary CA-301 PSU
  216. 3B28 oscilator
  217. A lot of schematics
  218. V8 amp
  219. market by Jac music
  220. 6P3C-1 SE ? .
  221. Cary slp70: Worth to upgrade?
  222. Hickok 123B tube tester
  223. Adding NFB makes headphone amp sound AWFUL!!!
  224. Filaments hard wired to B+ on EZ81 base
  225. What the bird is OS 18/600?
  226. ccs 10m90s what is wrong?
  227. Topology for balanced preamp
  228. 6v6 vs. 6l6 vs. 807 soundwise..
  229. Opinions/Advice on Triode Strap method
  230. Something like a Miniwatt N3 or APPJ PA0901A
  231. Extraordinary harmonics. Type 47 # tube amp.
  232. Made a new tube amp, 6J5 +27 +45
  233. Anyone ever play around with a GU-72?
  234. Possibility of using a UTC LMI-500 transformer...
  235. Aikido transformer
  236. Can someone explain why you need to re-adjust the balance on a tube amp every time
  237. Which factory made these tubes ?
  238. 813 and gm70
  239. 13E1 Push Pull
  240. dump find.
  241. ...6SN7GT operating points tube help.......
  242. 6L6 6SJ7 Amp please pick faults if any
  243. Updated DIY EL34B 6SJ7 SE Amp
  244. 6C18 x 6C33
  245. Vintage tube amp find
  246. any benefit to screen-grid drive a 6V6?
  247. Brown face Scott LK72
  248. Pilot 1060 integrated - make it better!
  249. Should I ground my K12G or my Bugle 2?
  250. 6c33 amp convert to 6c41

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