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  1. Parallel Driver Tubes?
  2. B+ Regulators
  3. Looking for Cary SLP98 Tube Preamplifier Schematic
  4. Hirage Le Monstre euals my best valve amps !
  5. Ran a JJ6v6S at 37 Watts, is it damaged?
  6. Zener diodes as protection clippers
  7. KT120 upgrade from KT88 6550
  8. panasonic dc link capacitors
  9. PTFE covered wire
  10. Grounding Qustion?
  11. New high-Z 1:1 input transformer from Hammond (10k:10k)
  12. Tube amp wiring and temperatures
  13. Pete Millett's Uniamp
  14. 211 tube. more time to brake in or bad tube
  15. Just a thought.
  16. Tube Heater Question
  17. No not Again...Aikido Plate dissipation question
  18. RH amp question!
  19. Mullard 5-20 power supply
  20. b&k 500 tube chart question
  21. Combining two single-ended tube stages for XLR-output - Question
  22. Scope pattern
  23. Diode cathode bias?
  24. Contact Enhancers/Corrosion Inhibitors for Aluminum
  25. My SE 46 tube monoblocks project
  26. E88CC / 6922 Datasheet Limiting Values
  27. Fisher Power Transformers
  28. does someone know about this russia amplifier ?
  29. How to improve this 6B4G push-pull circuit
  30. EL34 UL PP Transformer
  31. sears silvertone medalist stereo amp schematic needed
  32. Led bias on powertubes?
  33. Thermal Runaway
  34. Going from zero to pro tube amplifier. Resources?
  35. DIY Novar Socket
  36. Hum pickup from line output transformers
  37. Photo of a JJ 300B Filaments!! Please! :)
  38. Super FU-29
  39. Questions about Tim Mellow 6C33C OTL
  40. James or Silk for EL36SE?
  41. Dead KT88
  42. MS 110B KT88 INTEGRATED AMPLIFIER
  43. The Mighty 6550...
  44. recomend me some EL34 PLEASE
  45. Adding tone controls
  46. TJ Full Music 2A3/CNE
  47. groove tubes for headphone amp
  48. IXYS LTSpice Models (or something equivalent?)
  49. Soviet 6p3s/6p3s-e
  50. A case of direct coupled cathode follower
  51. SE45 schematic monoblock to stereo help
  52. Heathkit Schematics & Manuals
  53. 211 tube amp problem Help
  54. Department of inapprehensible schematics
  55. How low can you go...?
  56. EL34/6L6 Screen reistors...
  57. 809, anyone played around with them?
  58. Skinny OTL
  59. Adjust drive and output level with one knob
  60. Help me rack some Gates Program Amps
  61. Switch Mode Heater Supply
  62. Pre Ampje
  63. Maida Regulator Digital Control
  64. Worried by 110v reading on 6.3v tap....
  65. Safety Alert - UK Yaqin users
  66. 27> EL34 (triode) > 300B
  67. Rockola juke box amp - unusual features
  68. 3.5 watt ECL82 Amp
  69. 12BH7 Headphone Amp
  70. White Cathode Follower Quandary
  71. help in aikido for sennheiser hd580
  72. Home brew more economical than an ST-35
  73. Modeling Pull-Push transformer in LTspice
  74. The Fisher 400-C "Fixer-upper"
  75. Power Transformer question/concern
  76. Nice little schematic drawing app w/ tube symbols
  77. best budget diy kit?
  78. Transconductance amplifier for headphones.
  79. El Cheapo information?
  80. Aikido 9-Pin Configuration
  81. Strange motorboating issue
  82. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  83. Substituting higher wattage resistors
  84. cap coupling to interstage transformer or direct coupling?
  85. A question of feedback..
  86. Two Monoblocks "Dying" Within Days Of Each Other
  87. Russian 1Zh24B Pentods / design assistance.
  88. What Tubes for 5.8k PP transformers
  89. Problem with a power transformer.
  90. 300B OTL Preamp/Headphone Amp
  91. tantalum resistors
  92. 6BM8 in STC mode
  93. My Moscode again: What is the bias current?
  94. OTL WCF headphone amp build + awesome prototype material
  95. Type 42 single ended ideas
  96. Help with my Moscode 300 amp
  97. Thoughts on this volume potentiometer?
  98. Optimum load impedance for PCL85?
  99. Croatian triode Festival 2014.
  100. Old ekco tv transformers
  101. vacuum tube score.. what to do with
  102. Valve based disco mixer.
  103. Webcor ceramic phono input circuitry suggestions?
  104. Position of OPT windings
  105. sd2 seven pin??
  106. Help design a Small 250VDC PSU for tube preamp
  107. Bright Driver Tubes 12AU7, 12BH7, 5814...
  108. Question about using tube socket center hole for star ground
  109. Heathkit UA-2 clone project
  110. Schematic CAD Program
  111. Latest on the RH amps..
  112. Transformer design program
  113. 807 "Musicians Amplifier" help
  114. J.E. LABS PP2A3 POWER SUPPLY ?
  115. Mono Block Building Project
  116. EL34 CCS ideas
  117. Magnavox 8601-20
  118. wood/metal vs all-metal chassis
  119. Design data on dry battery tubes
  120. Differential tube with a gain stage 1178
  121. 6C4C tube ...Good to buy ?
  122. Including a C- winding on a filament transformer
  123. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  124. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  125. Electrolytic cap question
  126. Tube Socket ID
  127. JJ 5Y3S is too tall...need smaller tube
  128. Uniamp 2A3
  129. buzz noise from paraphase circuit
  130. Benefits of Enhanced Triode Connection
  131. Working out a valves load resistance?
  132. 813 Alternatives
  133. Help 6N6T pinout
  134. Very large parafeed cap
  135. Bright purple flash 6N1P
  136. Harman Kardon Citation II - rebuild questions
  137. Stoetkit junior mk2
  138. 1619 Push pull output stage
  139. Tube getter
  140. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  141. Audible Illusions and 6922
  142. quick access tube amp protection
  143. Identifying Genalex KT66 matched pair question
  144. Hunting 100Hz noise in SRPP+ stage
  145. JJ ECC83S Biasing conditions
  146. Audiophiletalk - Dirt Cheap SE
  147. 12AL8 Head-Amp with UTC Output Transformer
  148. SET monoblocks?
  149. EL84 Push Pull design from left over parts
  150. Strange UL Transformers
  151. Stabilization balanced currents in the PP stage.
  152. Current mirror stage in PP
  153. EL34 SE ultralinear schematic
  154. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  155. Toroid Power Transformer For GM-70 845 211 1000V
  156. Building the "Crystal Palace" Amp
  157. Improved Sound Card Interface - Ideas and Suggestions?
  158. Upgrading OPTs in production amp? (Yaquin MC-10L)
  159. any good Triode 6H8C preamp schematics out there???
  160. pushpull 6aq5 distortion
  161. Mr. Lian 845 SET more kit rather than commercial product.
  162. Opinion for otl ocl headphone amp
  163. Tube-newby wanting to make a good tube amp
  164. Anyone used a voltage tripler PS?
  165. Audioromy 828A / FU-29 tube layout
  166. Choosing Cathode Bypass Capacitor
  167. Ground loop gremlins
  168. Crackling Amp after Accident
  169. New CCS/ depletion mode MOSFETs available... experience anyone?
  170. Mengyue Mini
  171. Parafeed quest
  172. Determining linearity - differential gain stage
  173. 6HB6 - Any pratical experience?
  174. 27 Tube Preamp design questions
  175. Output Transformers Mount Position
  176. Critique please: Fixed bias 7591 SE
  177. Coupling Cap Improvements?
  178. RL 12T 15
  179. Tube instead of anode resistor
  180. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  181. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  182. Hf31 fidelity valve type
  183. Design of transformers for valve amplifiers.Part2
  184. Harman Kardon ta5000X alignment/manual
  185. Help with an analog meter hack
  186. dirkwright phono
  187. Zener Voltage Regulator
  188. Fisher X-101-B Substitute for 7591
  189. UNU-pnono riaa mm preamp
  190. My old amps
  191. Switching regulator on Kickstarter
  192. my yaqin 100b will not bias on v1 v3
  193. Zenith model B835R
  194. Want to build 2a3 amp for old radio
  195. Preamp Advice
  196. simple 5687 pre amp help
  197. Pulling TV From 61 Maggie Imperial Console?
  198. I can buy some 6U9's cheap - are they any good, and what could I build?
  199. K8011/K8010 PCB build thread
  200. Choosing an op point when using a tube 'off label'
  201. Choke inputs
  202. Unbalanced In > Balanced Out line amp - How To Do It?
  203. 6146b output transformer. I'm new and I need help.
  204. Your first DiY Low Cost/Low Voltage tube AMP
  205. Need some advice on OPT for kt88/6l6
  206. 1:1:1 transformers
  207. Output transformer in the cathode?
  208. Popping DC
  209. Power transformer wiring issues
  210. easy question - Magnavox 86-01 owners...
  211. Mic preamp input transformer alternative?
  212. What's the Best Way to Reduce Gain in a Preamp
  213. safety with high voltage input capacitor ?
  214. SE EL84 amp - reducing 100Hz hum
  215. Photos of large DHT preamps? (Or large amps in general)
  216. Minimum pin length (noval)
  217. Biasing of KT120
  218. SE to balanced transformer
  219. Decoupling Cap value - How Much?
  220. Cathode bypass Cap vs. No Bypass Cap
  221. Interesting circuit I thought.
  222. Yet another K12G thread
  223. 6N3 tube preamp question
  224. Driver vs Power tube
  225. Help in Bias tube amp for Adis Devy 7
  226. Tubes and HT
  227. HiFiMan EF-2A schematic sought
  228. Please, help with a WE91 project on behalf of a friend
  229. Proposed Headphone Amp Overhaul?
  230. protection of downstream line amp
  231. Is the 6E6P suitable for audio?
  232. me clone proto EL/PL 504
  233. Improving headphone amplifier
  234. 5902 LSTPICE Model
  235. Canary CA-301 PSU
  236. 3B28 oscilator
  237. A lot of schematics
  238. V8 amp
  239. market by Jac music
  240. 6P3C-1 SE ? .
  241. Cary slp70: Worth to upgrade?
  242. Hickok 123B tube tester
  243. Adding NFB makes headphone amp sound AWFUL!!!
  244. Filaments hard wired to B+ on EZ81 base
  245. What the bird is OS 18/600?
  246. ccs 10m90s what is wrong?
  247. Topology for balanced preamp
  248. 6v6 vs. 6l6 vs. 807 soundwise..
  249. Opinions/Advice on Triode Strap method
  250. Something like a Miniwatt N3 or APPJ PA0901A

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