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  1. Lamp in HV Centre Tap - why?
  2. EL156 PP
  3. Has anyone here bought from ussr-tubes.com ?
  4. Which cathode bypass capacitor?
  5. RIAA Schematic for-6SL7,7308 or?
  6. Chassis' for Tube Gear
  7. Convergent Audio Tech SL1 preamp
  8. Buy Them While You Can Not When You...
  9. Does anyone know of Thomas Martens?
  10. OTL for 40-80ohm speakers
  11. Morrison Dinosaur
  12. pcl86=14gw8 ??
  13. My little SE with GU50
  14. Source follower in a DC-coupled pp amp?
  15. Tube chassis for retail sale.
  16. Poor man's power supply
  17. High voltage driver for AB2 operation GU81m tubes
  18. 5AR4 rectified power supply question
  19. Direct Coupled Amp
  20. Is this EL84 kit from Germany worth fooling with?
  21. 6v6 PP Pentode mode
  22. 5 pin octal tube socket
  23. RCA Manual Typo?
  24. pete millet low mu preamp
  25. Capability to drive the 211 PP
  26. 6BG6G SE advice needed.
  27. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  28. Power booster
  29. I've just build this steroe amplifier
  30. What amp to build? Push Pull, SE? thoughts?
  31. amp sounds bad- fatman itube 252
  32. 6C33 single ended class A2 (cathode network question)
  33. Sweet Peach EL34b Amp - Distortion?
  34. 6C33C socket types, where to buy?
  35. haedphone amp. using 6418< NEED HELP
  36. finished my 6au6/807 amplifier
  37. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  38. Broskie "Unbalancer" - transformer specifications
  39. Tube chess.
  40. How Its Made - Vacuum Tubes
  41. Please help me understand power supply load
  42. 12AU7 - How absolute are maximum ratings?
  43. Tube rejuvination
  44. Article: Samsung brings back tubes in audio dock
  45. 1st build suggestions
  46. Parallel SE output
  47. Fixed Bias question
  48. vintage ua 610 schematic
  49. Which KT88 PP and which Transformers?
  50. Some more special small-signal tv tubes
  51. Help - YAQIN MS-20L schematic
  52. Power and Speaker cables
  53. Leak TL12+ with triode mode EF86
  54. diy tube dampers
  55. VTVM troubleshooting help
  56. PP amp crossover distortion
  57. Sanity check please? ST-70(-ish) power supply
  58. Thoughts of apparent noise on ground - due to power tx?
  59. hybride circlotron
  60. Clone
  61. 8156 Beam Pentode Compactron
  62. DOUBLE TRIODE (6N16B)
  63. looking for Tube I/V analog for dac schematic ?
  64. NewBee PPEL84
  65. Whooaa! Now we're talking.
  66. Cinema Engineering AT-18
  67. Back from school
  68. Amp ideas for my spare 3.3k output transformers.
  69. HEllo and a few suggestions please
  70. 1SH24B Pre-Amp (or buffer?)
  71. Anode cap for GU 29 / QQE06/40
  72. Back to back autotransformers for B+?
  73. Sound Valves M60 schematics
  74. Volume Pot for RH84
  75. Mengyue mini el34b
  76. Which Chinese integrated tube amp have the power for Rock Song ?
  77. Help on transformers please
  78. 300B alternatives
  79. Anybody using a tube amp in their car?
  80. What is a KT88-98?
  81. 6au6 line stage a bad idea?
  82. Making a Kron tube
  83. AY Symphonies preamp
  84. Need to Upgrade Tube Preamp Volume Pot
  85. Filament AC or DC?
  86. rasping sound from Dared VP-16
  87. Anyone have any "small signal" pentode models?
  88. Power amp distortion for modern amps
  89. Help with EL504-based amplifier
  90. Tubes: Are they worth it?
  91. Radio Shack Boston Monobloc (fuse question)
  92. 829B 3E29 Pentode PPP?
  93. Fixed Autobias?
  94. Best wishes
  95. Radiotron A504 amplifier schematic
  96. Blown power tube - a short story
  97. replace EL34 with EL37 !?
  98. Mono push-pull driver PCB
  99. Magnavox 139AA schematics, info?
  100. Anyone knows what driver tube on DowdyLama's GM-70......
  101. Building an amp around the QB5/1750 transmitter tube
  102. Instrument amp from '59 Lowrey donor chassis.
  103. cascoded gyrator loaded 6H9C to low idle.
  104. vacuum tube DAC and connection
  105. Dynaco ST70 II Right Channel Out
  106. ST70 Inrush Issue
  107. ECC88 OTL heaphone amp
  108. Help with deciding to build or buy Tube amp.
  109. Luxman LV-105 static on on channel
  110. equivlent of FU-50
  111. placing the volume control
  112. PP 300B ''transformer coupled''
  113. My First Tube Preamp
  114. Tube amp kit and speaker recommendations?
  115. First design GU81M SE triode
  116. Instruments & Amps forum - where is it?
  117. EL300 = 6FN5 / PL300 = 35FN5 tube
  118. 6U8 driving 45
  119. very low impedance white follower with 6H13C
  120. EL86 Any idea helps.
  121. 6112 and 6111 Mini-preamp
  122. Expert advice on what preamp to chose
  123. Harman Kardon DPR-7, Commander series pre/mixer
  124. input transformer - mumetal casing etc.
  125. SOHA headphone amp
  126. Using a single triode as a .......
  127. Sonic Frontiers SFP-1 Phono Stage
  128. Help!! with attenuation.
  129. power up inrush current limiter - anyone using?
  130. Audioromy FU-29, Latest Model 828A Mini Review
  131. Vertical-deflection
  132. Drilling a hole
  133. Edcor CXPP25-MS-8K V Triode Z-565
  134. bad opt measured values
  135. Mu Follower Driver for Push-Pull
  136. need datasheets for a phillips transformer if anyone has any
  137. Chicago power XFMR question.
  138. Help please on Christmas gift
  139. Audio Note P-zero
  140. SE EL34 Schematic - What do you think?
  141. Playing with hybrid amp: SRPP + MOSFET
  142. 300B filament supply question
  143. KT88 Parallel Push Pull
  144. cheating life out of old tubes?
  145. dBu transformer ratings
  146. Dared MP-2a3c mods
  147. Output transformers (Wolpert)
  148. Using Mains Transformers as Outputs
  149. Tube just for show...
  150. first project - first post - poddwatt
  151. High power CCS
  152. Analog Summing
  153. My new el34 + 12ax7 VCT amp. (Need Ideas For my first headphone vacuum tube amp Too~)
  154. cascode tubes
  155. High Fidelity by Pilot (circa 1953)
  156. Hardware help please
  157. integrated amps 100 per channel
  158. KT88 mounting question
  159. Output Transformer question
  160. Angstrom Thermionic
  161. ECC88 tube buffer NEEDED !
  162. Paralell SE 807 Amp design
  163. Putting together a tweaker friendly amplifier!
  164. Tube chassis
  165. DHT headphone Hybrid-CF+
  166. Looking for specs on this Beyer Xfmr
  167. Resistors for Berning EA-2101?
  168. Uneven Plate Glow
  169. Parafeed transformer sounds thin
  170. Lightbulbs as ccs
  171. My AWESOME First DIY amp
  172. Cary audio design SLI 80
  173. A1538 OPT?
  174. Genalex A2900 Keep or Sell?
  175. 6CB6 Spice Model wanted
  176. XFMR Help?
  177. 12 volt to 300 volt inverter question for tubes
  178. These amps should be verboten!
  179. how to use PCL86 instead of ecl86
  180. PSU for Aikido (4x 12SN7)
  181. SCA35 and AU-70
  182. Analisys of power amp limitations of tube bias range
  183. DIY Phono Preamp ??
  184. NOS 211 RCA or National Union?
  185. Iron Powder + Resin Output Transformer
  186. The Radio Hat Challenge
  187. EU regulations
  188. Transconductance for kt-90 in plain english
  189. Craftsmen RC-2
  190. Valve Amplification Company V100
  191. Parallel feed transformer with SRPP
  192. It's heeeeeere!- Valve Amplifiers 4th Edition
  193. opera consonance phonostage-PM1
  194. Anybody Explain this Preamp shematic?
  195. The high-voltage collection
  196. Input transformer topology question
  197. JE Labs 300Bdx stereo - troubleshooting
  198. battery operated 12/24/48 Volt multiple tube OTL
  199. Bringing up long-stored tube gear
  200. About RH84 three channel?
  201. MCC with Fisher
  202. Directly heated cathodes
  203. Build recommendation
  204. Ortofon KS 591 - informations
  205. Oatley K295-extra space for tubes
  206. A beginner's tube amp to drive a pair of fostex Fe103e
  207. Tame the beast.
  208. KT88 and Hammond Transformer
  209. B+ Drifts down after 2 hours
  210. Power amp sputters on turnoff
  211. Yet another EQP-1A
  212. How to bias 6SL7?
  213. 6CG7/6FQ7 = 6N5P (6Н5П)
  214. #27 mu stage
  215. Compactron Regulated Power Supply
  216. Best sounding voltage amplifier for hybride.
  217. PX25 to 300B pins
  218. de-gassing power tubes???
  219. Heathkit 51-29 output transformers issure
  220. 6AS7 Model
  221. 26H choke good enough for a grid or anode choke?
  222. Russian 6R2P for small amp.
  223. Power transformer primary is open.
  224. Rectifier oddness
  225. First Tube Build, Thoughts?
  226. Output Transformers
  227. Lazy Sunday 6SN7 Preamp
  228. Audio research VT200 Biasing & Schematic
  229. finished my new preamplifier!!
  230. What would be the correct output cap for this OTL Headphone Amp?
  231. Full Bridge Rectifier With Tubes
  232. Looking for data sheet for GE JAN 6146W/7212
  233. Best Valve pre-amp match for ME 550 amp
  234. Fisher 500c
  235. From old Philips tube books , just for tube audio DIY friends !
  236. UFO
  237. Adding a preamp?
  238. XS-225 valve amp circuit.
  239. LS7/CV1660 curves
  240. Differences between 12V6 tube and 12A6 tube?
  241. Please check my schematic
  242. 12W Push pull w/6C4C
  243. Tube Date Code
  244. For new members....
  245. Graphite ring on sweep tubes
  246. 6N6P tube - focus on
  247. Hot tube preamp pedal build
  248. Radford STA100 improvements?
  249. Playmaster unit 2 help needed!
  250. help me build an output transformer

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