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  1. EBC3 & CBL1 Tube AMP
  2. CLASS A HYBRID POWER AMP
  3. MXL V69 Mogami Edition signal cuts in/out
  4. Ultra-linear plate characteristic curve for EL34
  5. Need help to modify circuit to suit replacement power XFMR
  6. Line preamp schematic for 5GH8A wanted.
  7. help please - modify phono corrector
  8. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  9. A Russian glow tube regulator with specs of 75V 60mA ?
  10. Help with filament for ecc88
  11. How much power transformer is necessary?
  12. testing the 300b tube
  13. Headphone amplifier outputs, so many permutations!
  14. tube footprint in Eagle
  15. First Timer - DIY Tube Amp
  16. Help identify OT please
  17. gEDA and tubes
  18. Triode Electronics Issues?
  19. RCA BC5B consolette manual?
  20. Help with converting EL37 amp to KT66
  21. Preamp OPT
  22. Probleme with Volume Pot
  23. Simple SE 6L6 2 watt Homebrew
  24. is 6J32P equivalent of EF806 ?
  25. new tubes vs old ones
  26. 6p36s tube torture.
  27. Questions re: Bypass of B+ to differential amp
  28. Tube choice for yaqin cd3 buffer
  29. yesterday and today
  30. 260VDC need how much VAC transformer, is it 184VAC?
  31. preamp static
  32. Tube Line or Phono Stage bare kit
  33. Grounding of Hammond transformers
  34. Spud Amplifier with 6E5P Tube
  35. need a little help with identification
  36. aikido 12vac help needed
  37. Mullard 3-3 PCB
  38. OTL Using OPT
  39. VA/CF 6SN7 preamp input points?
  40. Copper losses in output transformers
  41. Yaqin MC550 Anyone?
  42. Bigger value output coupling
  43. DIY KT88 SEUL
  44. Leben CS300x feedback loop cap
  45. 6T8 / EABC80 as phase splitter / other uses
  46. Curve Tracer Screen Current
  47. Aikido Cathode Follower preamplifier with remote
  48. Grid Isolation in Fault Conditions
  49. Audio research ls2b parts list
  50. Heathkit USC-1 pre-amp
  51. Counterpoint SA3 Project
  52. Why such a high bias current on output valves ?
  53. how long before new tubes are run in ?
  54. Mullard 5-20 EL34 biasing
  55. Parallel Driver Tubes?
  56. B+ Regulators
  57. Looking for Cary SLP98 Tube Preamplifier Schematic
  58. Hirage Le Monstre equals my best valve amps !
  59. Ran a JJ6v6S at 37 Watts, is it damaged?
  60. Zener diodes as protection clippers
  61. KT120 upgrade from KT88 6550
  62. Grounding Qustion?
  63. New high-Z 1:1 input transformer from Hammond (10k:10k)
  64. Tube amp wiring and temperatures
  65. Pete Millett's Uniamp
  66. 211 tube. more time to brake in or bad tube
  67. Just a thought.
  68. Tube Heater Question
  69. No not Again...Aikido Plate dissipation question
  70. RH amp question!
  71. Mullard 5-20 power supply
  72. Combining two single-ended tube stages for XLR-output - Question
  73. Scope pattern
  74. Diode cathode bias?
  75. Contact Enhancers/Corrosion Inhibitors for Aluminum
  76. My SE 46 tube monoblocks project
  77. E88CC / 6922 Datasheet Limiting Values
  78. Fisher Power Transformers
  79. does someone know about this russia amplifier ?
  80. How to improve this 6B4G push-pull circuit
  81. EL34 UL PP Transformer
  82. sears silvertone medalist stereo amp schematic needed
  83. Led bias on powertubes?
  84. Thermal Runaway
  85. Going from zero to pro tube amplifier. Resources?
  86. DIY Novar Socket
  87. Hum pickup from line output transformers
  88. Photo of a JJ 300B Filaments!! Please! :)
  89. Super FU-29
  90. Questions about Tim Mellow 6C33C OTL
  91. James or Silk for EL36SE?
  92. Dead KT88
  93. MS 110B KT88 INTEGRATED AMPLIFIER
  94. The Mighty 6550...
  95. recomend me some EL34 PLEASE
  96. Adding tone controls
  97. TJ Full Music 2A3/CNE
  98. groove tubes for headphone amp
  99. Soviet 6p3s/6p3s-e
  100. A case of direct coupled cathode follower
  101. SE45 schematic monoblock to stereo help
  102. 211 tube amp problem Help
  103. Department of inapprehensible schematics
  104. How low can you go...?
  105. EL34/6L6 Screen reistors...
  106. 809, anyone played around with them?
  107. Skinny OTL
  108. Adjust drive and output level with one knob
  109. Help me rack some Gates Program Amps
  110. Switch Mode Heater Supply
  111. Pre Ampje
  112. Worried by 110v reading on 6.3v tap....
  113. Safety Alert - UK Yaqin users
  114. 27> EL34 (triode) > 300B
  115. Rockola juke box amp - unusual features
  116. 3.5 watt ECL82 Amp
  117. 12BH7 Headphone Amp
  118. White Cathode Follower Quandary
  119. help in aikido for sennheiser hd580
  120. Home brew more economical than an ST-35
  121. The Fisher 400-C "Fixer-upper"
  122. Power Transformer question/concern
  123. Nice little schematic drawing app w/ tube symbols
  124. best budget diy kit?
  125. Transconductance amplifier for headphones.
  126. El Cheapo information?
  127. Aikido 9-Pin Configuration
  128. Strange motorboating issue
  129. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  130. Substituting higher wattage resistors
  131. cap coupling to interstage transformer or direct coupling?
  132. A question of feedback..
  133. Two Monoblocks "Dying" Within Days Of Each Other
  134. Russian 1Zh24B Pentods / design assistance.
  135. What Tubes for 5.8k PP transformers
  136. Problem with a power transformer.
  137. 300B OTL Preamp/Headphone Amp
  138. tantalum resistors
  139. 6BM8 in STC mode
  140. My Moscode again: What is the bias current?
  141. OTL WCF headphone amp build + awesome prototype material
  142. Type 42 single ended ideas
  143. Help with my Moscode 300 amp
  144. Optimum load impedance for PCL85?
  145. Croatian triode Festival 2014.
  146. vacuum tube score.. what to do with
  147. Webcor ceramic phono input circuitry suggestions?
  148. Position of OPT windings
  149. sd2 seven pin??
  150. Help design a Small 250VDC PSU for tube preamp
  151. Bright Driver Tubes 12AU7, 12BH7, 5814...
  152. Question about using tube socket center hole for star ground
  153. Heathkit UA-2 clone project
  154. Latest on the RH amps..
  155. Transformer design program
  156. 807 "Musicians Amplifier" help
  157. J.E. LABS PP2A3 POWER SUPPLY ?
  158. Mono Block Building Project
  159. EL34 CCS ideas
  160. Magnavox 8601-20
  161. wood/metal vs all-metal chassis
  162. Design data on dry battery tubes
  163. Differential tube with a gain stage 1178
  164. 6C4C tube ...Good to buy ?
  165. Including a C- winding on a filament transformer
  166. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  167. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  168. Tube Socket ID
  169. JJ 5Y3S is too tall...need smaller tube
  170. Uniamp 2A3
  171. buzz noise from paraphase circuit
  172. Benefits of Enhanced Triode Connection
  173. Working out a valves load resistance?
  174. 813 Alternatives
  175. Help 6N6T pinout
  176. Very large parafeed cap
  177. Bright purple flash 6N1P
  178. Harman Kardon Citation II - rebuild questions
  179. Stoetkit junior mk2
  180. 1619 Push pull output stage
  181. Tube getter
  182. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  183. Audible Illusions and 6922
  184. quick access tube amp protection
  185. Identifying Genalex KT66 matched pair question
  186. Hunting 100Hz noise in SRPP+ stage
  187. JJ ECC83S Biasing conditions
  188. Audiophiletalk - Dirt Cheap SE
  189. 12AL8 Head-Amp with UTC Output Transformer
  190. SET monoblocks?
  191. EL84 Push Pull design from left over parts
  192. Strange UL Transformers
  193. Stabilization balanced currents in the PP stage.
  194. Current mirror stage in PP
  195. EL34 SE ultralinear schematic
  196. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  197. Toroid Power Transformer For GM-70 845 211 1000V
  198. Building the "Crystal Palace" Amp
  199. Upgrading OPTs in production amp? (Yaquin MC-10L)
  200. any good Triode 6H8C preamp schematics out there???
  201. pushpull 6aq5 distortion
  202. Mr. Lian 845 SET more kit rather than commercial product.
  203. Opinion for otl ocl headphone amp
  204. Tube-newby wanting to make a good tube amp
  205. Anyone used a voltage tripler PS?
  206. Audioromy 828A / FU-29 tube layout
  207. Choosing Cathode Bypass Capacitor
  208. Ground loop gremlins
  209. Crackling Amp after Accident
  210. New CCS/ depletion mode MOSFETs available... experience anyone?
  211. Mengyue Mini
  212. Parafeed quest
  213. Determining linearity - differential gain stage
  214. 6HB6 - Any pratical experience?
  215. 27 Tube Preamp design questions
  216. Output Transformers Mount Position
  217. Critique please: Fixed bias 7591 SE
  218. Coupling Cap Improvements?
  219. RL 12T 15
  220. Tube instead of anode resistor
  221. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  222. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  223. Hf31 fidelity valve type
  224. Design of transformers for valve amplifiers.Part2
  225. Harman Kardon ta5000X alignment/manual
  226. Help with an analog meter hack
  227. dirkwright phono
  228. Zener Voltage Regulator
  229. Fisher X-101-B Substitute for 7591
  230. UNU-pnono riaa mm preamp
  231. My old amps
  232. Switching regulator on Kickstarter
  233. my yaqin 100b will not bias on v1 v3
  234. Zenith model B835R
  235. Want to build 2a3 amp for old radio
  236. Preamp Advice
  237. simple 5687 pre amp help
  238. Pulling TV From 61 Maggie Imperial Console?
  239. I can buy some 6U9's cheap - are they any good, and what could I build?
  240. K8011/K8010 PCB build thread
  241. Choosing an op point when using a tube 'off label'
  242. Choke inputs
  243. Unbalanced In > Balanced Out line amp - How To Do It?
  244. 6146b output transformer. I'm new and I need help.
  245. Your first DiY Low Cost/Low Voltage tube AMP
  246. Need some advice on OPT for kt88/6l6
  247. 1:1:1 transformers
  248. Output transformer in the cathode?
  249. Popping DC
  250. Power transformer wiring issues

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