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  1. RCA Manual Typo?
  2. pete millet low mu preamp
  3. Capability to drive the 211 PP
  4. 6BG6G SE advice needed.
  5. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  6. Power booster
  7. I've just build this steroe amplifier
  8. What amp to build? Push Pull, SE? thoughts?
  9. amp sounds bad- fatman itube 252
  10. 6C33 single ended class A2 (cathode network question)
  11. Sweet Peach EL34b Amp - Distortion?
  12. 6C33C socket types, where to buy?
  13. haedphone amp. using 6418< NEED HELP
  14. finished my 6au6/807 amplifier
  15. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  16. Broskie "Unbalancer" - transformer specifications
  17. Tube chess.
  18. How Its Made - Vacuum Tubes
  19. Please help me understand power supply load
  20. 12AU7 - How absolute are maximum ratings?
  21. Tube rejuvination
  22. Article: Samsung brings back tubes in audio dock
  23. 1st build suggestions
  24. Parallel SE output
  25. Fixed Bias question
  26. vintage ua 610 schematic
  27. Which KT88 PP and which Transformers?
  28. Some more special small-signal tv tubes
  29. Help - YAQIN MS-20L schematic
  30. Power and Speaker cables
  31. Leak TL12+ with triode mode EF86
  32. diy tube dampers
  33. VTVM troubleshooting help
  34. PP amp crossover distortion
  35. Sanity check please? ST-70(-ish) power supply
  36. Thoughts of apparent noise on ground - due to power tx?
  37. hybride circlotron
  38. Clone
  39. 8156 Beam Pentode Compactron
  40. DOUBLE TRIODE (6N16B)
  41. looking for Tube I/V analog for dac schematic ?
  42. NewBee PPEL84
  43. Whooaa! Now we're talking.
  44. Cinema Engineering AT-18
  45. Back from school
  46. Amp ideas for my spare 3.3k output transformers.
  47. HEllo and a few suggestions please
  48. 1SH24B Pre-Amp (or buffer?)
  49. Anode cap for GU 29 / QQE06/40
  50. Back to back autotransformers for B+?
  51. Sound Valves M60 schematics
  52. Volume Pot for RH84
  53. Mengyue mini el34b
  54. Which Chinese integrated tube amp have the power for Rock Song ?
  55. Help on transformers please
  56. 300B alternatives
  57. Anybody using a tube amp in their car?
  58. What is a KT88-98?
  59. 6au6 line stage a bad idea?
  60. Making a Kron tube
  61. AY Symphonies preamp
  62. Need to Upgrade Tube Preamp Volume Pot
  63. Filament AC or DC?
  64. rasping sound from Dared VP-16
  65. Anyone have any "small signal" pentode models?
  66. Power amp distortion for modern amps
  67. Help with EL504-based amplifier
  68. Tubes: Are they worth it?
  69. Radio Shack Boston Monobloc (fuse question)
  70. 829B 3E29 Pentode PPP?
  71. Fixed Autobias?
  72. Best wishes
  73. Radiotron A504 amplifier schematic
  74. Blown power tube - a short story
  75. replace EL34 with EL37 !?
  76. Mono push-pull driver PCB
  77. Magnavox 139AA schematics, info?
  78. Anyone knows what driver tube on DowdyLama's GM-70......
  79. Building an amp around the QB5/1750 transmitter tube
  80. Instrument amp from '59 Lowrey donor chassis.
  81. cascoded gyrator loaded 6H9C to low idle.
  82. vacuum tube DAC and connection
  83. Dynaco ST70 II Right Channel Out
  84. ST70 Inrush Issue
  85. ECC88 OTL heaphone amp
  86. Help with deciding to build or buy Tube amp.
  87. Luxman LV-105 static on on channel
  88. equivlent of FU-50
  89. placing the volume control
  90. PP 300B ''transformer coupled''
  91. My First Tube Preamp
  92. Tube amp kit and speaker recommendations?
  93. First design GU81M SE triode
  94. Instruments & Amps forum - where is it?
  95. EL300 = 6FN5 / PL300 = 35FN5 tube
  96. 6U8 driving 45
  97. very low impedance white follower with 6H13C
  98. EL86 Any idea helps.
  99. 6112 and 6111 Mini-preamp
  100. Expert advice on what preamp to chose
  101. Harman Kardon DPR-7, Commander series pre/mixer
  102. input transformer - mumetal casing etc.
  103. SOHA headphone amp
  104. Using a single triode as a .......
  105. Sonic Frontiers SFP-1 Phono Stage
  106. Help!! with attenuation.
  107. power up inrush current limiter - anyone using?
  108. Audioromy FU-29, Latest Model 828A Mini Review
  109. Vertical-deflection
  110. Drilling a hole
  111. Edcor CXPP25-MS-8K V Triode Z-565
  112. bad opt measured values
  113. Mu Follower Driver for Push-Pull
  114. need datasheets for a phillips transformer if anyone has any
  115. Chicago power XFMR question.
  116. Help please on Christmas gift
  117. Audio Note P-zero
  118. SE EL34 Schematic - What do you think?
  119. Playing with hybrid amp: SRPP + MOSFET
  120. 300B filament supply question
  121. KT88 Parallel Push Pull
  122. cheating life out of old tubes?
  123. dBu transformer ratings
  124. Dared MP-2a3c mods
  125. Output transformers (Wolpert)
  126. Using Mains Transformers as Outputs
  127. Tube just for show...
  128. first project - first post - poddwatt
  129. High power CCS
  130. Analog Summing
  131. My new el34 + 12ax7 VCT amp. (Need Ideas For my first headphone vacuum tube amp Too~)
  132. cascode tubes
  133. High Fidelity by Pilot (circa 1953)
  134. Hardware help please
  135. integrated amps 100 per channel
  136. KT88 mounting question
  137. Output Transformer question
  138. Angstrom Thermionic
  139. ECC88 tube buffer NEEDED !
  140. Paralell SE 807 Amp design
  141. Putting together a tweaker friendly amplifier!
  142. Tube chassis
  143. DHT headphone Hybrid-CF+
  144. Looking for specs on this Beyer Xfmr
  145. Resistors for Berning EA-2101?
  146. Uneven Plate Glow
  147. Parafeed transformer sounds thin
  148. Lightbulbs as ccs
  149. My AWESOME First DIY amp
  150. Cary audio design SLI 80
  151. A1538 OPT?
  152. Genalex A2900 Keep or Sell?
  153. 6CB6 Spice Model wanted
  154. XFMR Help?
  155. 12 volt to 300 volt inverter question for tubes
  156. These amps should be verboten!
  157. how to use PCL86 instead of ecl86
  158. PSU for Aikido (4x 12SN7)
  159. SCA35 and AU-70
  160. Analisys of power amp limitations of tube bias range
  161. DIY Phono Preamp ??
  162. NOS 211 RCA or National Union?
  163. Iron Powder + Resin Output Transformer
  164. The Radio Hat Challenge
  165. EU regulations
  166. Transconductance for kt-90 in plain english
  167. Craftsmen RC-2
  168. Valve Amplification Company V100
  169. Parallel feed transformer with SRPP
  170. It's heeeeeere!- Valve Amplifiers 4th Edition
  171. opera consonance phonostage-PM1
  172. Anybody Explain this Preamp shematic?
  173. The high-voltage collection
  174. Input transformer topology question
  175. JE Labs 300Bdx stereo - troubleshooting
  176. battery operated 12/24/48 Volt multiple tube OTL
  177. Bringing up long-stored tube gear
  178. About RH84 three channel?
  179. MCC with Fisher
  180. Directly heated cathodes
  181. Build recommendation
  182. Ortofon KS 591 - informations
  183. Oatley K295-extra space for tubes
  184. A beginner's tube amp to drive a pair of fostex Fe103e
  185. Tame the beast.
  186. KT88 and Hammond Transformer
  187. B+ Drifts down after 2 hours
  188. Power amp sputters on turnoff
  189. Yet another EQP-1A
  190. How to bias 6SL7?
  191. 6CG7/6FQ7 = 6N5P (6Н5П)
  192. #27 mu stage
  193. Compactron Regulated Power Supply
  194. Best sounding voltage amplifier for hybride.
  195. PX25 to 300B pins
  196. de-gassing power tubes???
  197. Heathkit 51-29 output transformers issure
  198. 6AS7 Model
  199. 26H choke good enough for a grid or anode choke?
  200. Russian 6R2P for small amp.
  201. Power transformer primary is open.
  202. Rectifier oddness
  203. First Tube Build, Thoughts?
  204. Output Transformers
  205. Lazy Sunday 6SN7 Preamp
  206. Audio research VT200 Biasing & Schematic
  207. finished my new preamplifier!!
  208. What would be the correct output cap for this OTL Headphone Amp?
  209. Full Bridge Rectifier With Tubes
  210. Looking for data sheet for GE JAN 6146W/7212
  211. Best Valve pre-amp match for ME 550 amp
  212. Fisher 500c
  213. From old Philips tube books , just for tube audio DIY friends !
  214. UFO
  215. Adding a preamp?
  216. XS-225 valve amp circuit.
  217. LS7/CV1660 curves
  218. Differences between 12V6 tube and 12A6 tube?
  219. Please check my schematic
  220. 12W Push pull w/6C4C
  221. Tube Date Code
  222. For new members....
  223. Graphite ring on sweep tubes
  224. 6N6P tube - focus on
  225. Hot tube preamp pedal build
  226. Radford STA100 improvements?
  227. Playmaster unit 2 help needed!
  228. help me build an output transformer
  229. Vintage Magnavox tube amp
  230. Christmas Build, advice needed.
  231. Speaker suggestions for ST-70
  232. Tube markings?
  233. gaumont-kalee
  234. amplifiers audio research D90
  235. 40W Glass A 300B tube schematic needed.
  236. Hum in one channel only
  237. Water cooling Power Tubes
  238. Toroid Output Transformer from Plitron
  239. Scott LK-30 Assembly Manual Needed
  240. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  241. The best valve amp!
  242. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  243. More probably stupid questions about feedback
  244. single stage amp?
  245. SS 83 again
  246. Making Spice Models for tubes
  247. Seth mk 2 ???
  248. Colorful inspiration
  249. Testing KT-90's Ei NIs Yugoslavia
  250. El Cheapo Transformer Question

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