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  1. Ran a JJ6v6S at 37 Watts, is it damaged?
  2. Zener diodes as protection clippers
  3. KT120 upgrade from KT88 6550
  4. panasonic dc link capacitors
  5. PTFE covered wire
  6. Grounding Qustion?
  7. New high-Z 1:1 input transformer from Hammond (10k:10k)
  8. Tube amp wiring and temperatures
  9. Pete Millett's Uniamp
  10. 211 tube. more time to brake in or bad tube
  11. Just a thought.
  12. Tube Heater Question
  13. No not Again...Aikido Plate dissipation question
  14. RH amp question!
  15. Mullard 5-20 power supply
  16. b&k 500 tube chart question
  17. Combining two single-ended tube stages for XLR-output - Question
  18. Scope pattern
  19. Diode cathode bias?
  20. Contact Enhancers/Corrosion Inhibitors for Aluminum
  21. My SE 46 tube monoblocks project
  22. E88CC / 6922 Datasheet Limiting Values
  23. Fisher Power Transformers
  24. does someone know about this russia amplifier ?
  25. How to improve this 6B4G push-pull circuit
  26. EL34 UL PP Transformer
  27. sears silvertone medalist stereo amp schematic needed
  28. Led bias on powertubes?
  29. Thermal Runaway
  30. Going from zero to pro tube amplifier. Resources?
  31. DIY Novar Socket
  32. Hum pickup from line output transformers
  33. Photo of a JJ 300B Filaments!! Please! :)
  34. Super FU-29
  35. Questions about Tim Mellow 6C33C OTL
  36. James or Silk for EL36SE?
  37. Dead KT88
  38. MS 110B KT88 INTEGRATED AMPLIFIER
  39. The Mighty 6550...
  40. recomend me some EL34 PLEASE
  41. Adding tone controls
  42. TJ Full Music 2A3/CNE
  43. groove tubes for headphone amp
  44. IXYS LTSpice Models (or something equivalent?)
  45. Soviet 6p3s/6p3s-e
  46. A case of direct coupled cathode follower
  47. SE45 schematic monoblock to stereo help
  48. Heathkit Schematics & Manuals
  49. 211 tube amp problem Help
  50. Department of inapprehensible schematics
  51. How low can you go...?
  52. EL34/6L6 Screen reistors...
  53. 809, anyone played around with them?
  54. Skinny OTL
  55. Adjust drive and output level with one knob
  56. Help me rack some Gates Program Amps
  57. Switch Mode Heater Supply
  58. Pre Ampje
  59. Maida Regulator Digital Control
  60. Worried by 110v reading on 6.3v tap....
  61. Safety Alert - UK Yaqin users
  62. 27> EL34 (triode) > 300B
  63. Rockola juke box amp - unusual features
  64. 3.5 watt ECL82 Amp
  65. 12BH7 Headphone Amp
  66. White Cathode Follower Quandary
  67. help in aikido for sennheiser hd580
  68. Home brew more economical than an ST-35
  69. Modeling Pull-Push transformer in LTspice
  70. The Fisher 400-C "Fixer-upper"
  71. Power Transformer question/concern
  72. Nice little schematic drawing app w/ tube symbols
  73. best budget diy kit?
  74. Transconductance amplifier for headphones.
  75. El Cheapo information?
  76. Aikido 9-Pin Configuration
  77. Strange motorboating issue
  78. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  79. Substituting higher wattage resistors
  80. cap coupling to interstage transformer or direct coupling?
  81. A question of feedback..
  82. Two Monoblocks "Dying" Within Days Of Each Other
  83. Russian 1Zh24B Pentods / design assistance.
  84. What Tubes for 5.8k PP transformers
  85. Problem with a power transformer.
  86. 300B OTL Preamp/Headphone Amp
  87. tantalum resistors
  88. 6BM8 in STC mode
  89. My Moscode again: What is the bias current?
  90. OTL WCF headphone amp build + awesome prototype material
  91. Type 42 single ended ideas
  92. Help with my Moscode 300 amp
  93. Thoughts on this volume potentiometer?
  94. Optimum load impedance for PCL85?
  95. Croatian triode Festival 2014.
  96. Old ekco tv transformers
  97. vacuum tube score.. what to do with
  98. Valve based disco mixer.
  99. Webcor ceramic phono input circuitry suggestions?
  100. Position of OPT windings
  101. sd2 seven pin??
  102. Help design a Small 250VDC PSU for tube preamp
  103. Bright Driver Tubes 12AU7, 12BH7, 5814...
  104. Question about using tube socket center hole for star ground
  105. Heathkit UA-2 clone project
  106. Schematic CAD Program
  107. Latest on the RH amps..
  108. Transformer design program
  109. 807 "Musicians Amplifier" help
  110. J.E. LABS PP2A3 POWER SUPPLY ?
  111. Mono Block Building Project
  112. EL34 CCS ideas
  113. Magnavox 8601-20
  114. wood/metal vs all-metal chassis
  115. Design data on dry battery tubes
  116. Differential tube with a gain stage 1178
  117. 6C4C tube ...Good to buy ?
  118. Including a C- winding on a filament transformer
  119. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  120. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  121. Electrolytic cap question
  122. Tube Socket ID
  123. JJ 5Y3S is too tall...need smaller tube
  124. Uniamp 2A3
  125. buzz noise from paraphase circuit
  126. Benefits of Enhanced Triode Connection
  127. Working out a valves load resistance?
  128. 813 Alternatives
  129. Help 6N6T pinout
  130. Very large parafeed cap
  131. Bright purple flash 6N1P
  132. Harman Kardon Citation II - rebuild questions
  133. Stoetkit junior mk2
  134. 1619 Push pull output stage
  135. Tube getter
  136. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  137. Audible Illusions and 6922
  138. quick access tube amp protection
  139. Identifying Genalex KT66 matched pair question
  140. Hunting 100Hz noise in SRPP+ stage
  141. JJ ECC83S Biasing conditions
  142. Audiophiletalk - Dirt Cheap SE
  143. 12AL8 Head-Amp with UTC Output Transformer
  144. SET monoblocks?
  145. EL84 Push Pull design from left over parts
  146. Strange UL Transformers
  147. Stabilization balanced currents in the PP stage.
  148. Current mirror stage in PP
  149. EL34 SE ultralinear schematic
  150. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  151. Toroid Power Transformer For GM-70 845 211 1000V
  152. Building the "Crystal Palace" Amp
  153. Improved Sound Card Interface - Ideas and Suggestions?
  154. Upgrading OPTs in production amp? (Yaquin MC-10L)
  155. any good Triode 6H8C preamp schematics out there???
  156. pushpull 6aq5 distortion
  157. Mr. Lian 845 SET more kit rather than commercial product.
  158. Opinion for otl ocl headphone amp
  159. Tube-newby wanting to make a good tube amp
  160. Anyone used a voltage tripler PS?
  161. Audioromy 828A / FU-29 tube layout
  162. Choosing Cathode Bypass Capacitor
  163. Ground loop gremlins
  164. Crackling Amp after Accident
  165. New CCS/ depletion mode MOSFETs available... experience anyone?
  166. Mengyue Mini
  167. Parafeed quest
  168. Determining linearity - differential gain stage
  169. 6HB6 - Any pratical experience?
  170. 27 Tube Preamp design questions
  171. Output Transformers Mount Position
  172. Critique please: Fixed bias 7591 SE
  173. Coupling Cap Improvements?
  174. RL 12T 15
  175. Tube instead of anode resistor
  176. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  177. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  178. Hf31 fidelity valve type
  179. Design of transformers for valve amplifiers.Part2
  180. Harman Kardon ta5000X alignment/manual
  181. Help with an analog meter hack
  182. dirkwright phono
  183. Zener Voltage Regulator
  184. Fisher X-101-B Substitute for 7591
  185. UNU-pnono riaa mm preamp
  186. My old amps
  187. Switching regulator on Kickstarter
  188. my yaqin 100b will not bias on v1 v3
  189. Zenith model B835R
  190. Want to build 2a3 amp for old radio
  191. Preamp Advice
  192. simple 5687 pre amp help
  193. Pulling TV From 61 Maggie Imperial Console?
  194. I can buy some 6U9's cheap - are they any good, and what could I build?
  195. K8011/K8010 PCB build thread
  196. Choosing an op point when using a tube 'off label'
  197. Choke inputs
  198. Unbalanced In > Balanced Out line amp - How To Do It?
  199. 6146b output transformer. I'm new and I need help.
  200. Your first DiY Low Cost/Low Voltage tube AMP
  201. Need some advice on OPT for kt88/6l6
  202. 1:1:1 transformers
  203. Output transformer in the cathode?
  204. Popping DC
  205. Power transformer wiring issues
  206. easy question - Magnavox 86-01 owners...
  207. Mic preamp input transformer alternative?
  208. What's the Best Way to Reduce Gain in a Preamp
  209. safety with high voltage input capacitor ?
  210. SE EL84 amp - reducing 100Hz hum
  211. Photos of large DHT preamps? (Or large amps in general)
  212. Minimum pin length (noval)
  213. Biasing of KT120
  214. SE to balanced transformer
  215. Decoupling Cap value - How Much?
  216. Cathode bypass Cap vs. No Bypass Cap
  217. Interesting circuit I thought.
  218. Yet another K12G thread
  219. 6N3 tube preamp question
  220. Driver vs Power tube
  221. Help in Bias tube amp for Adis Devy 7
  222. Tubes and HT
  223. HiFiMan EF-2A schematic sought
  224. Please, help with a WE91 project on behalf of a friend
  225. Proposed Headphone Amp Overhaul?
  226. protection of downstream line amp
  227. Is the 6E6P suitable for audio?
  228. me clone proto EL/PL 504
  229. Improving headphone amplifier
  230. 5902 LSTPICE Model
  231. Canary CA-301 PSU
  232. 3B28 oscilator
  233. A lot of schematics
  234. V8 amp
  235. market by Jac music
  236. 6P3C-1 SE ? .
  237. Cary slp70: Worth to upgrade?
  238. Hickok 123B tube tester
  239. Adding NFB makes headphone amp sound AWFUL!!!
  240. Filaments hard wired to B+ on EZ81 base
  241. What the bird is OS 18/600?
  242. ccs 10m90s what is wrong?
  243. Topology for balanced preamp
  244. 6v6 vs. 6l6 vs. 807 soundwise..
  245. Opinions/Advice on Triode Strap method
  246. Something like a Miniwatt N3 or APPJ PA0901A
  247. Extraordinary harmonics. Type 47 # tube amp.
  248. Made a new tube amp, 6J5 +27 +45
  249. Anyone ever play around with a GU-72?
  250. Possibility of using a UTC LMI-500 transformer...

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