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  1. Preamp grounding questions
  2. Tube rectifiers
  3. DIY PL84 + E180F
  4. McIntosh on How It's Made
  5. Choke input LCLC supply - question on minimum current
  6. EBC3 & CBL1 Tube AMP
  7. CLASS A HYBRID POWER AMP
  8. MXL V69 Mogami Edition signal cuts in/out
  9. Ultra-linear plate characteristic curve for EL34
  10. Need help to modify circuit to suit replacement power XFMR
  11. Line preamp schematic for 5GH8A wanted.
  12. help please - modify phono corrector
  13. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  14. A Russian glow tube regulator with specs of 75V 60mA ?
  15. Help with filament for ecc88
  16. How much power transformer is necessary?
  17. testing the 300b tube
  18. Headphone amplifier outputs, so many permutations!
  19. tube footprint in Eagle
  20. First Timer - DIY Tube Amp
  21. Help identify OT please
  22. gEDA and tubes
  23. Triode Electronics Issues?
  24. RCA BC5B consolette manual?
  25. Help with converting EL37 amp to KT66
  26. Preamp OPT
  27. Probleme with Volume Pot
  28. Simple SE 6L6 2 watt Homebrew
  29. is 6J32P equivalent of EF806 ?
  30. new tubes vs old ones
  31. 6p36s tube torture.
  32. Questions re: Bypass of B+ to differential amp
  33. Tube choice for yaqin cd3 buffer
  34. yesterday and today
  35. 260VDC need how much VAC transformer, is it 184VAC?
  36. preamp static
  37. Tube Line or Phono Stage bare kit
  38. Grounding of Hammond transformers
  39. Spud Amplifier with 6E5P Tube
  40. need a little help with identification
  41. aikido 12vac help needed
  42. Mullard 3-3 PCB
  43. OTL Using OPT
  44. VA/CF 6SN7 preamp input points?
  45. Copper losses in output transformers
  46. Yaqin MC550 Anyone?
  47. Bigger value output coupling
  48. DIY KT88 SEUL
  49. Leben CS300x feedback loop cap
  50. 6T8 / EABC80 as phase splitter / other uses
  51. Curve Tracer Screen Current
  52. Aikido Cathode Follower preamplifier with remote
  53. Grid Isolation in Fault Conditions
  54. Audio research ls2b parts list
  55. Heathkit USC-1 pre-amp
  56. Counterpoint SA3 Project
  57. Why such a high bias current on output valves ?
  58. how long before new tubes are run in ?
  59. Mullard 5-20 EL34 biasing
  60. Parallel Driver Tubes?
  61. B+ Regulators
  62. Looking for Cary SLP98 Tube Preamplifier Schematic
  63. Hirage Le Monstre equals my best valve amps !
  64. Ran a JJ6v6S at 37 Watts, is it damaged?
  65. Zener diodes as protection clippers
  66. KT120 upgrade from KT88 6550
  67. Grounding Qustion?
  68. New high-Z 1:1 input transformer from Hammond (10k:10k)
  69. Tube amp wiring and temperatures
  70. Pete Millett's Uniamp
  71. 211 tube. more time to brake in or bad tube
  72. Just a thought.
  73. Tube Heater Question
  74. No not Again...Aikido Plate dissipation question
  75. RH amp question!
  76. Mullard 5-20 power supply
  77. Combining two single-ended tube stages for XLR-output - Question
  78. Scope pattern
  79. Diode cathode bias?
  80. Contact Enhancers/Corrosion Inhibitors for Aluminum
  81. My SE 46 tube monoblocks project
  82. E88CC / 6922 Datasheet Limiting Values
  83. Fisher Power Transformers
  84. does someone know about this russia amplifier ?
  85. How to improve this 6B4G push-pull circuit
  86. EL34 UL PP Transformer
  87. sears silvertone medalist stereo amp schematic needed
  88. Led bias on powertubes?
  89. Thermal Runaway
  90. Going from zero to pro tube amplifier. Resources?
  91. DIY Novar Socket
  92. Hum pickup from line output transformers
  93. Photo of a JJ 300B Filaments!! Please! :)
  94. Super FU-29
  95. Questions about Tim Mellow 6C33C OTL
  96. James or Silk for EL36SE?
  97. Dead KT88
  98. MS 110B KT88 INTEGRATED AMPLIFIER
  99. The Mighty 6550...
  100. recomend me some EL34 PLEASE
  101. Adding tone controls
  102. TJ Full Music 2A3/CNE
  103. groove tubes for headphone amp
  104. IXYS LTSpice Models (or something equivalent?)
  105. Soviet 6p3s/6p3s-e
  106. A case of direct coupled cathode follower
  107. SE45 schematic monoblock to stereo help
  108. 211 tube amp problem Help
  109. Department of inapprehensible schematics
  110. How low can you go...?
  111. EL34/6L6 Screen reistors...
  112. 809, anyone played around with them?
  113. Skinny OTL
  114. Adjust drive and output level with one knob
  115. Help me rack some Gates Program Amps
  116. Switch Mode Heater Supply
  117. Pre Ampje
  118. Worried by 110v reading on 6.3v tap....
  119. Safety Alert - UK Yaqin users
  120. 27> EL34 (triode) > 300B
  121. Rockola juke box amp - unusual features
  122. 3.5 watt ECL82 Amp
  123. 12BH7 Headphone Amp
  124. White Cathode Follower Quandary
  125. help in aikido for sennheiser hd580
  126. Home brew more economical than an ST-35
  127. Modeling Pull-Push transformer in LTspice
  128. The Fisher 400-C "Fixer-upper"
  129. Power Transformer question/concern
  130. Nice little schematic drawing app w/ tube symbols
  131. best budget diy kit?
  132. Transconductance amplifier for headphones.
  133. El Cheapo information?
  134. Aikido 9-Pin Configuration
  135. Strange motorboating issue
  136. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  137. Substituting higher wattage resistors
  138. cap coupling to interstage transformer or direct coupling?
  139. A question of feedback..
  140. Two Monoblocks "Dying" Within Days Of Each Other
  141. Russian 1Zh24B Pentods / design assistance.
  142. What Tubes for 5.8k PP transformers
  143. Problem with a power transformer.
  144. 300B OTL Preamp/Headphone Amp
  145. tantalum resistors
  146. 6BM8 in STC mode
  147. My Moscode again: What is the bias current?
  148. OTL WCF headphone amp build + awesome prototype material
  149. Type 42 single ended ideas
  150. Help with my Moscode 300 amp
  151. Optimum load impedance for PCL85?
  152. Croatian triode Festival 2014.
  153. vacuum tube score.. what to do with
  154. Webcor ceramic phono input circuitry suggestions?
  155. Position of OPT windings
  156. sd2 seven pin??
  157. Help design a Small 250VDC PSU for tube preamp
  158. Bright Driver Tubes 12AU7, 12BH7, 5814...
  159. Question about using tube socket center hole for star ground
  160. Heathkit UA-2 clone project
  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. Tube Socket ID
  176. JJ 5Y3S is too tall...need smaller tube
  177. Uniamp 2A3
  178. buzz noise from paraphase circuit
  179. Benefits of Enhanced Triode Connection
  180. Working out a valves load resistance?
  181. 813 Alternatives
  182. Help 6N6T pinout
  183. Very large parafeed cap
  184. Bright purple flash 6N1P
  185. Harman Kardon Citation II - rebuild questions
  186. Stoetkit junior mk2
  187. 1619 Push pull output stage
  188. Tube getter
  189. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  190. Audible Illusions and 6922
  191. quick access tube amp protection
  192. Identifying Genalex KT66 matched pair question
  193. Hunting 100Hz noise in SRPP+ stage
  194. JJ ECC83S Biasing conditions
  195. Audiophiletalk - Dirt Cheap SE
  196. 12AL8 Head-Amp with UTC Output Transformer
  197. SET monoblocks?
  198. EL84 Push Pull design from left over parts
  199. Strange UL Transformers
  200. Stabilization balanced currents in the PP stage.
  201. Current mirror stage in PP
  202. EL34 SE ultralinear schematic
  203. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  204. Toroid Power Transformer For GM-70 845 211 1000V
  205. Building the "Crystal Palace" Amp
  206. Upgrading OPTs in production amp? (Yaquin MC-10L)
  207. any good Triode 6H8C preamp schematics out there???
  208. pushpull 6aq5 distortion
  209. Mr. Lian 845 SET more kit rather than commercial product.
  210. Opinion for otl ocl headphone amp
  211. Tube-newby wanting to make a good tube amp
  212. Anyone used a voltage tripler PS?
  213. Audioromy 828A / FU-29 tube layout
  214. Choosing Cathode Bypass Capacitor
  215. Ground loop gremlins
  216. Crackling Amp after Accident
  217. New CCS/ depletion mode MOSFETs available... experience anyone?
  218. Mengyue Mini
  219. Parafeed quest
  220. Determining linearity - differential gain stage
  221. 6HB6 - Any pratical experience?
  222. 27 Tube Preamp design questions
  223. Output Transformers Mount Position
  224. Critique please: Fixed bias 7591 SE
  225. Coupling Cap Improvements?
  226. RL 12T 15
  227. Tube instead of anode resistor
  228. HELP!! Terrible 50Hz hum in Mullard 10W DIY amp
  229. My New 45 SET (choke-loaded 6SN7, direct-coupled)
  230. Hf31 fidelity valve type
  231. Design of transformers for valve amplifiers.Part2
  232. Harman Kardon ta5000X alignment/manual
  233. Help with an analog meter hack
  234. dirkwright phono
  235. Zener Voltage Regulator
  236. Fisher X-101-B Substitute for 7591
  237. UNU-pnono riaa mm preamp
  238. My old amps
  239. Switching regulator on Kickstarter
  240. my yaqin 100b will not bias on v1 v3
  241. Zenith model B835R
  242. Want to build 2a3 amp for old radio
  243. Preamp Advice
  244. simple 5687 pre amp help
  245. Pulling TV From 61 Maggie Imperial Console?
  246. I can buy some 6U9's cheap - are they any good, and what could I build?
  247. K8011/K8010 PCB build thread
  248. Choosing an op point when using a tube 'off label'
  249. Choke inputs
  250. Unbalanced In > Balanced Out line amp - How To Do It?

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