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  1. My SE 46 tube monoblocks project
  2. E88CC / 6922 Datasheet Limiting Values
  3. Fisher Power Transformers
  4. does someone know about this russia amplifier ?
  5. How to improve this 6B4G push-pull circuit
  6. EL34 UL PP Transformer
  7. sears silvertone medalist stereo amp schematic needed
  8. Led bias on powertubes?
  9. Thermal Runaway
  10. Going from zero to pro tube amplifier. Resources?
  11. DIY Novar Socket
  12. Hum pickup from line output transformers
  13. Photo of a JJ 300B Filaments!! Please! :)
  14. Super FU-29
  15. Questions about Tim Mellow 6C33C OTL
  16. James or Silk for EL36SE?
  17. Dead KT88
  18. MS 110B KT88 INTEGRATED AMPLIFIER
  19. The Mighty 6550...
  20. recomend me some EL34 PLEASE
  21. Adding tone controls
  22. TJ Full Music 2A3/CNE
  23. groove tubes for headphone amp
  24. IXYS LTSpice Models (or something equivalent?)
  25. Soviet 6p3s/6p3s-e
  26. A case of direct coupled cathode follower
  27. SE45 schematic monoblock to stereo help
  28. Heathkit Schematics & Manuals
  29. 211 tube amp problem Help
  30. Department of inapprehensible schematics
  31. How low can you go...?
  32. EL34/6L6 Screen reistors...
  33. 809, anyone played around with them?
  34. Skinny OTL
  35. Adjust drive and output level with one knob
  36. Help me rack some Gates Program Amps
  37. Switch Mode Heater Supply
  38. Pre Ampje
  39. Maida Regulator Digital Control
  40. Worried by 110v reading on 6.3v tap....
  41. Safety Alert - UK Yaqin users
  42. 27> EL34 (triode) > 300B
  43. Rockola juke box amp - unusual features
  44. 3.5 watt ECL82 Amp
  45. 12BH7 Headphone Amp
  46. White Cathode Follower Quandary
  47. help in aikido for sennheiser hd580
  48. Home brew more economical than an ST-35
  49. Modeling Pull-Push transformer in LTspice
  50. The Fisher 400-C "Fixer-upper"
  51. Power Transformer question/concern
  52. Nice little schematic drawing app w/ tube symbols
  53. best budget diy kit?
  54. Transconductance amplifier for headphones.
  55. El Cheapo information?
  56. Aikido 9-Pin Configuration
  57. Strange motorboating issue
  58. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  59. Substituting higher wattage resistors
  60. cap coupling to interstage transformer or direct coupling?
  61. A question of feedback..
  62. Two Monoblocks "Dying" Within Days Of Each Other
  63. Russian 1Zh24B Pentods / design assistance.
  64. What Tubes for 5.8k PP transformers
  65. Problem with a power transformer.
  66. 300B OTL Preamp/Headphone Amp
  67. tantalum resistors
  68. 6BM8 in STC mode
  69. My Moscode again: What is the bias current?
  70. OTL WCF headphone amp build + awesome prototype material
  71. Type 42 single ended ideas
  72. Help with my Moscode 300 amp
  73. Thoughts on this volume potentiometer?
  74. Optimum load impedance for PCL85?
  75. Croatian triode Festival 2014.
  76. Old ekco tv transformers
  77. vacuum tube score.. what to do with
  78. Valve based disco mixer.
  79. Webcor ceramic phono input circuitry suggestions?
  80. Position of OPT windings
  81. sd2 seven pin??
  82. Help design a Small 250VDC PSU for tube preamp
  83. Bright Driver Tubes 12AU7, 12BH7, 5814...
  84. Question about using tube socket center hole for star ground
  85. Heathkit UA-2 clone project
  86. Schematic CAD Program
  87. Latest on the RH amps..
  88. Transformer design program
  89. 807 "Musicians Amplifier" help
  90. J.E. LABS PP2A3 POWER SUPPLY ?
  91. Mono Block Building Project
  92. EL34 CCS ideas
  93. Magnavox 8601-20
  94. wood/metal vs all-metal chassis
  95. Design data on dry battery tubes
  96. Differential tube with a gain stage 1178
  97. 6C4C tube ...Good to buy ?
  98. Including a C- winding on a filament transformer
  99. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  100. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  101. Electrolytic cap question
  102. Tube Socket ID
  103. JJ 5Y3S is too tall...need smaller tube
  104. Uniamp 2A3
  105. buzz noise from paraphase circuit
  106. Benefits of Enhanced Triode Connection
  107. Working out a valves load resistance?
  108. 813 Alternatives
  109. Help 6N6T pinout
  110. Very large parafeed cap
  111. Bright purple flash 6N1P
  112. Harman Kardon Citation II - rebuild questions
  113. Stoetkit junior mk2
  114. 1619 Push pull output stage
  115. Tube getter
  116. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  117. Audible Illusions and 6922
  118. quick access tube amp protection
  119. Identifying Genalex KT66 matched pair question
  120. Hunting 100Hz noise in SRPP+ stage
  121. JJ ECC83S Biasing conditions
  122. Audiophiletalk - Dirt Cheap SE
  123. 12AL8 Head-Amp with UTC Output Transformer
  124. SET monoblocks?
  125. EL84 Push Pull design from left over parts
  126. Strange UL Transformers
  127. Stabilization balanced currents in the PP stage.
  128. Current mirror stage in PP
  129. EL34 SE ultralinear schematic
  130. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  131. Toroid Power Transformer For GM-70 845 211 1000V
  132. Building the "Crystal Palace" Amp
  133. Improved Sound Card Interface - Ideas and Suggestions?
  134. Upgrading OPTs in production amp? (Yaquin MC-10L)
  135. any good Triode 6H8C preamp schematics out there???
  136. pushpull 6aq5 distortion
  137. Mr. Lian 845 SET more kit rather than commercial product.
  138. Opinion for otl ocl headphone amp
  139. Tube-newby wanting to make a good tube amp
  140. Anyone used a voltage tripler PS?
  141. Audioromy 828A / FU-29 tube layout
  142. Choosing Cathode Bypass Capacitor
  143. Ground loop gremlins
  144. Crackling Amp after Accident
  145. New CCS/ depletion mode MOSFETs available... experience anyone?
  146. Mengyue Mini
  147. Parafeed quest
  148. Determining linearity - differential gain stage
  149. 6HB6 - Any pratical experience?
  150. 27 Tube Preamp design questions
  151. Output Transformers Mount Position
  152. Critique please: Fixed bias 7591 SE
  153. Coupling Cap Improvements?
  154. RL 12T 15
  155. Tube instead of anode resistor
  156. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  157. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  158. Hf31 fidelity valve type
  159. Design of transformers for valve amplifiers.Part2
  160. Harman Kardon ta5000X alignment/manual
  161. Help with an analog meter hack
  162. dirkwright phono
  163. Zener Voltage Regulator
  164. Fisher X-101-B Substitute for 7591
  165. UNU-pnono riaa mm preamp
  166. My old amps
  167. Switching regulator on Kickstarter
  168. my yaqin 100b will not bias on v1 v3
  169. Zenith model B835R
  170. Want to build 2a3 amp for old radio
  171. Preamp Advice
  172. simple 5687 pre amp help
  173. Pulling TV From 61 Maggie Imperial Console?
  174. I can buy some 6U9's cheap - are they any good, and what could I build?
  175. K8011/K8010 PCB build thread
  176. Choosing an op point when using a tube 'off label'
  177. Choke inputs
  178. Unbalanced In > Balanced Out line amp - How To Do It?
  179. 6146b output transformer. I'm new and I need help.
  180. Your first DiY Low Cost/Low Voltage tube AMP
  181. Need some advice on OPT for kt88/6l6
  182. 1:1:1 transformers
  183. Output transformer in the cathode?
  184. Popping DC
  185. Power transformer wiring issues
  186. easy question - Magnavox 86-01 owners...
  187. Mic preamp input transformer alternative?
  188. What's the Best Way to Reduce Gain in a Preamp
  189. safety with high voltage input capacitor ?
  190. SE EL84 amp - reducing 100Hz hum
  191. Photos of large DHT preamps? (Or large amps in general)
  192. Minimum pin length (noval)
  193. Biasing of KT120
  194. SE to balanced transformer
  195. Decoupling Cap value - How Much?
  196. Cathode bypass Cap vs. No Bypass Cap
  197. Interesting circuit I thought.
  198. Yet another K12G thread
  199. 6N3 tube preamp question
  200. Driver vs Power tube
  201. Help in Bias tube amp for Adis Devy 7
  202. Tubes and HT
  203. HiFiMan EF-2A schematic sought
  204. Please, help with a WE91 project on behalf of a friend
  205. Proposed Headphone Amp Overhaul?
  206. protection of downstream line amp
  207. Is the 6E6P suitable for audio?
  208. me clone proto EL/PL 504
  209. Improving headphone amplifier
  210. 5902 LSTPICE Model
  211. Canary CA-301 PSU
  212. 3B28 oscilator
  213. A lot of schematics
  214. V8 amp
  215. market by Jac music
  216. 6P3C-1 SE ? .
  217. Cary slp70: Worth to upgrade?
  218. Hickok 123B tube tester
  219. Adding NFB makes headphone amp sound AWFUL!!!
  220. Filaments hard wired to B+ on EZ81 base
  221. What the bird is OS 18/600?
  222. ccs 10m90s what is wrong?
  223. Topology for balanced preamp
  224. 6v6 vs. 6l6 vs. 807 soundwise..
  225. Opinions/Advice on Triode Strap method
  226. Something like a Miniwatt N3 or APPJ PA0901A
  227. Extraordinary harmonics. Type 47 # tube amp.
  228. Made a new tube amp, 6J5 +27 +45
  229. Anyone ever play around with a GU-72?
  230. Possibility of using a UTC LMI-500 transformer...
  231. Aikido transformer
  232. Can someone explain why you need to re-adjust the balance on a tube amp every time
  233. Which factory made these tubes ?
  234. 813 and gm70
  235. 13E1 Push Pull
  236. dump find.
  237. ...6SN7GT operating points tube help.......
  238. 6L6 6SJ7 Amp please pick faults if any
  239. Updated DIY EL34B 6SJ7 SE Amp
  240. 6C18 x 6C33
  241. Vintage tube amp find
  242. any benefit to screen-grid drive a 6V6?
  243. Brown face Scott LK72
  244. Pilot 1060 integrated - make it better!
  245. Should I ground my K12G or my Bugle 2?
  246. 6c33 amp convert to 6c41
  247. STA-LEVEL thumbs problem
  248. Amp motorboating at power up
  249. Spice models for AL4 and RS242 tubes
  250. Mains Switch

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