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  1. Chinese board 6L6 KT88 is it worth???
  2. Valve Rectifier Testing
  3. Harman Kardon TA-120 Output Transformer
  4. Single ended transformer as pushpull?
  5. Resurrecting a nOrh SE9 Integrated Amp
  6. Fisher Amps?
  7. Repurposing an old Gulbransen Organ tube amp
  8. Help, the sound is silken or blow up?
  9. Now here's an idea - The DIYF QUAD
  10. Parallel output SE amp options
  11. What tube is equivalent 5879?
  12. Filament Xfmr: can I trade volts for amps?
  13. GU50 PP possible with this iron ?
  14. Hifi tube amps - overall sound
  15. Preamp grounding questions
  16. Tube rectifiers
  17. DIY PL84 + E180F
  18. McIntosh on How It's Made
  19. Choke input LCLC supply - question on minimum current
  20. EBC3 & CBL1 Tube AMP
  21. CLASS A HYBRID POWER AMP
  22. MXL V69 Mogami Edition signal cuts in/out
  23. Ultra-linear plate characteristic curve for EL34
  24. Need help to modify circuit to suit replacement power XFMR
  25. Line preamp schematic for 5GH8A wanted.
  26. help please - modify phono corrector
  27. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  28. A Russian glow tube regulator with specs of 75V 60mA ?
  29. Help with filament for ecc88
  30. How much power transformer is necessary?
  31. testing the 300b tube
  32. Headphone amplifier outputs, so many permutations!
  33. tube footprint in Eagle
  34. Need VTVM repairs
  35. First Timer - DIY Tube Amp
  36. Help identify OT please
  37. gEDA and tubes
  38. Triode Electronics Issues?
  39. RCA BC5B consolette manual?
  40. Help with converting EL37 amp to KT66
  41. treadmill choke
  42. Preamp OPT
  43. Probleme with Volume Pot
  44. Simple SE 6L6 2 watt Homebrew
  45. is 6J32P equivalent of EF806 ?
  46. new tubes vs old ones
  47. 6p36s tube torture.
  48. Questions re: Bypass of B+ to differential amp
  49. Tube choice for yaqin cd3 buffer
  50. yesterday and today
  51. 260VDC need how much VAC transformer, is it 184VAC?
  52. preamp static
  53. Tube Line or Phono Stage bare kit
  54. Grounding of Hammond transformers
  55. Spud Amplifier with 6E5P Tube
  56. RAT Tube Tester build
  57. need a little help with identification
  58. aikido 12vac help needed
  59. Mullard 3-3 PCB
  60. OTL Using OPT
  61. VA/CF 6SN7 preamp input points?
  62. Copper losses in output transformers
  63. Yaqin MC550 Anyone?
  64. Bigger value output coupling
  65. DIY KT88 SEUL
  66. Leben CS300x feedback loop cap
  67. 6T8 / EABC80 as phase splitter / other uses
  68. Curve Tracer Screen Current
  69. Aikido Cathode Follower preamplifier with remote
  70. Grid Isolation in Fault Conditions
  71. Audio research ls2b parts list
  72. Heathkit USC-1 pre-amp
  73. Counterpoint SA3 Project
  74. Why such a high bias current on output valves ?
  75. how long before new tubes are run in ?
  76. Latest project, valve stereo disco mixer
  77. Mullard 5-20 EL34 biasing
  78. Parallel Driver Tubes?
  79. B+ Regulators
  80. Looking for Cary SLP98 Tube Preamplifier Schematic
  81. Hirage Le Monstre euals my best valve amps !
  82. Ran a JJ6v6S at 37 Watts, is it damaged?
  83. Zener diodes as protection clippers
  84. KT120 upgrade from KT88 6550
  85. panasonic dc link capacitors
  86. PTFE covered wire
  87. Grounding Qustion?
  88. New high-Z 1:1 input transformer from Hammond (10k:10k)
  89. Tube amp wiring and temperatures
  90. Pete Millett's Uniamp
  91. 211 tube. more time to brake in or bad tube
  92. Just a thought.
  93. Tube Heater Question
  94. No not Again...Aikido Plate dissipation question
  95. RH amp question!
  96. Mullard 5-20 power supply
  97. b&k 500 tube chart question
  98. Combining two single-ended tube stages for XLR-output - Question
  99. Scope pattern
  100. Diode cathode bias?
  101. Contact Enhancers/Corrosion Inhibitors for Aluminum
  102. My SE 46 tube monoblocks project
  103. E88CC / 6922 Datasheet Limiting Values
  104. Fisher Power Transformers
  105. does someone know about this russia amplifier ?
  106. How to improve this 6B4G push-pull circuit
  107. EL34 UL PP Transformer
  108. sears silvertone medalist stereo amp schematic needed
  109. Led bias on powertubes?
  110. Thermal Runaway
  111. Going from zero to pro tube amplifier. Resources?
  112. DIY Novar Socket
  113. Hum pickup from line output transformers
  114. Photo of a JJ 300B Filaments!! Please! :)
  115. Super FU-29
  116. Questions about Tim Mellow 6C33C OTL
  117. James or Silk for EL36SE?
  118. Dead KT88
  119. MS 110B KT88 INTEGRATED AMPLIFIER
  120. The Mighty 6550...
  121. recomend me some EL34 PLEASE
  122. Adding tone controls
  123. TJ Full Music 2A3/CNE
  124. groove tubes for headphone amp
  125. IXYS LTSpice Models (or something equivalent?)
  126. Soviet 6p3s/6p3s-e
  127. A case of direct coupled cathode follower
  128. SE45 schematic monoblock to stereo help
  129. Heathkit Schematics & Manuals
  130. 211 tube amp problem Help
  131. Department of inapprehensible schematics
  132. How low can you go...?
  133. EL34/6L6 Screen reistors...
  134. 809, anyone played around with them?
  135. Skinny OTL
  136. Adjust drive and output level with one knob
  137. Help me rack some Gates Program Amps
  138. Switch Mode Heater Supply
  139. Pre Ampje
  140. Maida Regulator Digital Control
  141. Worried by 110v reading on 6.3v tap....
  142. Safety Alert - UK Yaqin users
  143. 27> EL34 (triode) > 300B
  144. Rockola juke box amp - unusual features
  145. 3.5 watt ECL82 Amp
  146. 12BH7 Headphone Amp
  147. White Cathode Follower Quandary
  148. help in aikido for sennheiser hd580
  149. Home brew more economical than an ST-35
  150. Modeling Pull-Push transformer in LTspice
  151. The Fisher 400-C "Fixer-upper"
  152. Power Transformer question/concern
  153. Nice little schematic drawing app w/ tube symbols
  154. best budget diy kit?
  155. Transconductance amplifier for headphones.
  156. El Cheapo information?
  157. Aikido 9-Pin Configuration
  158. Strange motorboating issue
  159. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  160. Substituting higher wattage resistors
  161. cap coupling to interstage transformer or direct coupling?
  162. A question of feedback..
  163. Two Monoblocks "Dying" Within Days Of Each Other
  164. Russian 1Zh24B Pentods / design assistance.
  165. What Tubes for 5.8k PP transformers
  166. Problem with a power transformer.
  167. 300B OTL Preamp/Headphone Amp
  168. tantalum resistors
  169. 6BM8 in STC mode
  170. My Moscode again: What is the bias current?
  171. OTL WCF headphone amp build + awesome prototype material
  172. Type 42 single ended ideas
  173. Help with my Moscode 300 amp
  174. Thoughts on this volume potentiometer?
  175. Optimum load impedance for PCL85?
  176. Croatian triode Festival 2014.
  177. Old ekco tv transformers
  178. vacuum tube score.. what to do with
  179. Valve based disco mixer.
  180. Webcor ceramic phono input circuitry suggestions?
  181. Position of OPT windings
  182. sd2 seven pin??
  183. Help design a Small 250VDC PSU for tube preamp
  184. Bright Driver Tubes 12AU7, 12BH7, 5814...
  185. Question about using tube socket center hole for star ground
  186. Heathkit UA-2 clone project
  187. Schematic CAD Program
  188. Latest on the RH amps..
  189. Transformer design program
  190. 807 "Musicians Amplifier" help
  191. J.E. LABS PP2A3 POWER SUPPLY ?
  192. Mono Block Building Project
  193. EL34 CCS ideas
  194. Magnavox 8601-20
  195. wood/metal vs all-metal chassis
  196. Design data on dry battery tubes
  197. Differential tube with a gain stage 1178
  198. 6C4C tube ...Good to buy ?
  199. Including a C- winding on a filament transformer
  200. CINEMAG 15B TRANSFORMERS balanced>unbalanced
  201. Rebuilt Heathkit AA32 with hum on MAG PHONO input
  202. Electrolytic cap question
  203. Tube Socket ID
  204. JJ 5Y3S is too tall...need smaller tube
  205. Uniamp 2A3
  206. buzz noise from paraphase circuit
  207. Benefits of Enhanced Triode Connection
  208. Working out a valves load resistance?
  209. 813 Alternatives
  210. Help 6N6T pinout
  211. Very large parafeed cap
  212. Bright purple flash 6N1P
  213. Harman Kardon Citation II - rebuild questions
  214. Stoetkit junior mk2
  215. 1619 Push pull output stage
  216. Tube getter
  217. The sensation of the 21st Century. Galvanic SUPER HIGH END PP power for all types of
  218. Audible Illusions and 6922
  219. quick access tube amp protection
  220. Identifying Genalex KT66 matched pair question
  221. Hunting 100Hz noise in SRPP+ stage
  222. JJ ECC83S Biasing conditions
  223. Audiophiletalk - Dirt Cheap SE
  224. 12AL8 Head-Amp with UTC Output Transformer
  225. SET monoblocks?
  226. EL84 Push Pull design from left over parts
  227. Strange UL Transformers
  228. Stabilization balanced currents in the PP stage.
  229. Current mirror stage in PP
  230. EL34 SE ultralinear schematic
  231. Question: Acceptable DC current in push-pull output transformer due to tube mismatch?
  232. Toroid Power Transformer For GM-70 845 211 1000V
  233. Building the "Crystal Palace" Amp
  234. Improved Sound Card Interface - Ideas and Suggestions?
  235. Upgrading OPTs in production amp? (Yaquin MC-10L)
  236. any good Triode 6H8C preamp schematics out there???
  237. pushpull 6aq5 distortion
  238. Mr. Lian 845 SET more kit rather than commercial product.
  239. Opinion for otl ocl headphone amp
  240. Tube-newby wanting to make a good tube amp
  241. Anyone used a voltage tripler PS?
  242. Audioromy 828A / FU-29 tube layout
  243. Choosing Cathode Bypass Capacitor
  244. Ground loop gremlins
  245. Crackling Amp after Accident
  246. New CCS/ depletion mode MOSFETs available... experience anyone?
  247. Mengyue Mini
  248. Parafeed quest
  249. Determining linearity - differential gain stage
  250. 6HB6 - Any pratical experience?

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