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  1. A Russian glow tube regulator with specs of 75V 60mA ?
  2. Help with filament for ecc88
  3. How much power transformer is necessary?
  4. testing the 300b tube
  5. Headphone amplifier outputs, so many permutations!
  6. tube footprint in Eagle
  7. Need VTVM repairs
  8. First Timer - DIY Tube Amp
  9. Help identify OT please
  10. gEDA and tubes
  11. Triode Electronics Issues?
  12. RCA BC5B consolette manual?
  13. Help with converting EL37 amp to KT66
  14. treadmill choke
  15. Preamp OPT
  16. Probleme with Volume Pot
  17. Simple SE 6L6 2 watt Homebrew
  18. is 6J32P equivalent of EF806 ?
  19. new tubes vs old ones
  20. 6p36s tube torture.
  21. Questions re: Bypass of B+ to differential amp
  22. Tube choice for yaqin cd3 buffer
  23. yesterday and today
  24. 260VDC need how much VAC transformer, is it 184VAC?
  25. preamp static
  26. Tube Line or Phono Stage bare kit
  27. Grounding of Hammond transformers
  28. Spud Amplifier with 6E5P Tube
  29. RAT Tube Tester build
  30. need a little help with identification
  31. aikido 12vac help needed
  32. Mullard 3-3 PCB
  33. OTL Using OPT
  34. VA/CF 6SN7 preamp input points?
  35. Copper losses in output transformers
  36. Yaqin MC550 Anyone?
  37. Bigger value output coupling
  38. DIY KT88 SEUL
  39. Leben CS300x feedback loop cap
  40. 6T8 / EABC80 as phase splitter / other uses
  41. Curve Tracer Screen Current
  42. Aikido Cathode Follower preamplifier with remote
  43. Grid Isolation in Fault Conditions
  44. Audio research ls2b parts list
  45. Heathkit USC-1 pre-amp
  46. Counterpoint SA3 Project
  47. Why such a high bias current on output valves ?
  48. how long before new tubes are run in ?
  49. Latest project, valve stereo disco mixer
  50. Mullard 5-20 EL34 biasing
  51. Parallel Driver Tubes?
  52. B+ Regulators
  53. Looking for Cary SLP98 Tube Preamplifier Schematic
  54. Hirage Le Monstre euals my best valve amps !
  55. Ran a JJ6v6S at 37 Watts, is it damaged?
  56. Zener diodes as protection clippers
  57. KT120 upgrade from KT88 6550
  58. panasonic dc link capacitors
  59. PTFE covered wire
  60. Grounding Qustion?
  61. New high-Z 1:1 input transformer from Hammond (10k:10k)
  62. Tube amp wiring and temperatures
  63. Pete Millett's Uniamp
  64. 211 tube. more time to brake in or bad tube
  65. Just a thought.
  66. Tube Heater Question
  67. No not Again...Aikido Plate dissipation question
  68. RH amp question!
  69. Mullard 5-20 power supply
  70. b&k 500 tube chart question
  71. Combining two single-ended tube stages for XLR-output - Question
  72. Scope pattern
  73. Diode cathode bias?
  74. Contact Enhancers/Corrosion Inhibitors for Aluminum
  75. My SE 46 tube monoblocks project
  76. E88CC / 6922 Datasheet Limiting Values
  77. Fisher Power Transformers
  78. does someone know about this russia amplifier ?
  79. How to improve this 6B4G push-pull circuit
  80. EL34 UL PP Transformer
  81. sears silvertone medalist stereo amp schematic needed
  82. Led bias on powertubes?
  83. Thermal Runaway
  84. Going from zero to pro tube amplifier. Resources?
  85. DIY Novar Socket
  86. Hum pickup from line output transformers
  87. Photo of a JJ 300B Filaments!! Please! :)
  88. Super FU-29
  89. Questions about Tim Mellow 6C33C OTL
  90. James or Silk for EL36SE?
  91. Dead KT88
  92. MS 110B KT88 INTEGRATED AMPLIFIER
  93. The Mighty 6550...
  94. recomend me some EL34 PLEASE
  95. Adding tone controls
  96. TJ Full Music 2A3/CNE
  97. groove tubes for headphone amp
  98. IXYS LTSpice Models (or something equivalent?)
  99. Soviet 6p3s/6p3s-e
  100. A case of direct coupled cathode follower
  101. SE45 schematic monoblock to stereo help
  102. Heathkit Schematics & Manuals
  103. 211 tube amp problem Help
  104. Department of inapprehensible schematics
  105. How low can you go...?
  106. EL34/6L6 Screen reistors...
  107. 809, anyone played around with them?
  108. Skinny OTL
  109. Adjust drive and output level with one knob
  110. Help me rack some Gates Program Amps
  111. Switch Mode Heater Supply
  112. Pre Ampje
  113. Maida Regulator Digital Control
  114. Worried by 110v reading on 6.3v tap....
  115. Safety Alert - UK Yaqin users
  116. 27> EL34 (triode) > 300B
  117. Rockola juke box amp - unusual features
  118. 3.5 watt ECL82 Amp
  119. 12BH7 Headphone Amp
  120. White Cathode Follower Quandary
  121. help in aikido for sennheiser hd580
  122. Home brew more economical than an ST-35
  123. Modeling Pull-Push transformer in LTspice
  124. The Fisher 400-C "Fixer-upper"
  125. Power Transformer question/concern
  126. Nice little schematic drawing app w/ tube symbols
  127. best budget diy kit?
  128. Transconductance amplifier for headphones.
  129. El Cheapo information?
  130. Aikido 9-Pin Configuration
  131. Strange motorboating issue
  132. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  133. Substituting higher wattage resistors
  134. cap coupling to interstage transformer or direct coupling?
  135. A question of feedback..
  136. Two Monoblocks "Dying" Within Days Of Each Other
  137. Russian 1Zh24B Pentods / design assistance.
  138. What Tubes for 5.8k PP transformers
  139. Problem with a power transformer.
  140. 300B OTL Preamp/Headphone Amp
  141. tantalum resistors
  142. 6BM8 in STC mode
  143. My Moscode again: What is the bias current?
  144. OTL WCF headphone amp build + awesome prototype material
  145. Type 42 single ended ideas
  146. Help with my Moscode 300 amp
  147. Thoughts on this volume potentiometer?
  148. Optimum load impedance for PCL85?
  149. Croatian triode Festival 2014.
  150. Old ekco tv transformers
  151. vacuum tube score.. what to do with
  152. Valve based disco mixer.
  153. Webcor ceramic phono input circuitry suggestions?
  154. Position of OPT windings
  155. sd2 seven pin??
  156. Help design a Small 250VDC PSU for tube preamp
  157. Bright Driver Tubes 12AU7, 12BH7, 5814...
  158. Question about using tube socket center hole for star ground
  159. Heathkit UA-2 clone project
  160. Schematic CAD Program
  161. Latest on the RH amps..
  162. Transformer design program
  163. 807 "Musicians Amplifier" help
  164. J.E. LABS PP2A3 POWER SUPPLY ?
  165. Mono Block Building Project
  166. EL34 CCS ideas
  167. Magnavox 8601-20
  168. wood/metal vs all-metal chassis
  169. Design data on dry battery tubes
  170. Differential tube with a gain stage 1178
  171. 6C4C tube ...Good to buy ?
  172. Including a C- winding on a filament transformer
  173. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  174. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  175. Electrolytic cap question
  176. Tube Socket ID
  177. JJ 5Y3S is too tall...need smaller tube
  178. Uniamp 2A3
  179. buzz noise from paraphase circuit
  180. Benefits of Enhanced Triode Connection
  181. Working out a valves load resistance?
  182. 813 Alternatives
  183. Help 6N6T pinout
  184. Very large parafeed cap
  185. Bright purple flash 6N1P
  186. Harman Kardon Citation II - rebuild questions
  187. Stoetkit junior mk2
  188. 1619 Push pull output stage
  189. Tube getter
  190. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  191. Audible Illusions and 6922
  192. quick access tube amp protection
  193. Identifying Genalex KT66 matched pair question
  194. Hunting 100Hz noise in SRPP+ stage
  195. JJ ECC83S Biasing conditions
  196. Audiophiletalk - Dirt Cheap SE
  197. 12AL8 Head-Amp with UTC Output Transformer
  198. SET monoblocks?
  199. EL84 Push Pull design from left over parts
  200. Strange UL Transformers
  201. Stabilization balanced currents in the PP stage.
  202. Current mirror stage in PP
  203. EL34 SE ultralinear schematic
  204. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  205. Toroid Power Transformer For GM-70 845 211 1000V
  206. Building the "Crystal Palace" Amp
  207. Improved Sound Card Interface - Ideas and Suggestions?
  208. Upgrading OPTs in production amp? (Yaquin MC-10L)
  209. any good Triode 6H8C preamp schematics out there???
  210. pushpull 6aq5 distortion
  211. Mr. Lian 845 SET more kit rather than commercial product.
  212. Opinion for otl ocl headphone amp
  213. Tube-newby wanting to make a good tube amp
  214. Anyone used a voltage tripler PS?
  215. Audioromy 828A / FU-29 tube layout
  216. Choosing Cathode Bypass Capacitor
  217. Ground loop gremlins
  218. Crackling Amp after Accident
  219. New CCS/ depletion mode MOSFETs available... experience anyone?
  220. Mengyue Mini
  221. Parafeed quest
  222. Determining linearity - differential gain stage
  223. 6HB6 - Any pratical experience?
  224. 27 Tube Preamp design questions
  225. Output Transformers Mount Position
  226. Critique please: Fixed bias 7591 SE
  227. Coupling Cap Improvements?
  228. RL 12T 15
  229. Tube instead of anode resistor
  230. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  231. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  232. Hf31 fidelity valve type
  233. Design of transformers for valve amplifiers.Part2
  234. Harman Kardon ta5000X alignment/manual
  235. Help with an analog meter hack
  236. dirkwright phono
  237. Zener Voltage Regulator
  238. Fisher X-101-B Substitute for 7591
  239. UNU-pnono riaa mm preamp
  240. My old amps
  241. Switching regulator on Kickstarter
  242. my yaqin 100b will not bias on v1 v3
  243. Zenith model B835R
  244. Want to build 2a3 amp for old radio
  245. Preamp Advice
  246. simple 5687 pre amp help
  247. Pulling TV From 61 Maggie Imperial Console?
  248. I can buy some 6U9's cheap - are they any good, and what could I build?
  249. K8011/K8010 PCB build thread
  250. Choosing an op point when using a tube 'off label'

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