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  1. Fixed Bias question
  2. vintage ua 610 schematic
  3. Which KT88 PP and which Transformers?
  4. Some more special small-signal tv tubes
  5. Help - YAQIN MS-20L schematic
  6. Power and Speaker cables
  7. Leak TL12+ with triode mode EF86
  8. diy tube dampers
  9. VTVM troubleshooting help
  10. PP amp crossover distortion
  11. Sanity check please? ST-70(-ish) power supply
  12. Thoughts of apparent noise on ground - due to power tx?
  13. hybride circlotron
  14. Clone
  15. 8156 Beam Pentode Compactron
  16. DOUBLE TRIODE (6N16B)
  17. looking for Tube I/V analog for dac schematic ?
  18. NewBee PPEL84
  19. Whooaa! Now we're talking.
  20. Cinema Engineering AT-18
  21. Back from school
  22. Amp ideas for my spare 3.3k output transformers.
  23. HEllo and a few suggestions please
  24. 1SH24B Pre-Amp (or buffer?)
  25. Anode cap for GU 29 / QQE06/40
  26. Back to back autotransformers for B+?
  27. Sound Valves M60 schematics
  28. Volume Pot for RH84
  29. Mengyue mini el34b
  30. Which Chinese integrated tube amp have the power for Rock Song ?
  31. Help on transformers please
  32. 300B alternatives
  33. Anybody using a tube amp in their car?
  34. What is a KT88-98?
  35. 6au6 line stage a bad idea?
  36. Making a Kron tube
  37. AY Symphonies preamp
  38. Need to Upgrade Tube Preamp Volume Pot
  39. Filament AC or DC?
  40. rasping sound from Dared VP-16
  41. Anyone have any "small signal" pentode models?
  42. Power amp distortion for modern amps
  43. Help with EL504-based amplifier
  44. Tubes: Are they worth it?
  45. Radio Shack Boston Monobloc (fuse question)
  46. 829B 3E29 Pentode PPP?
  47. Fixed Autobias?
  48. Best wishes
  49. Radiotron A504 amplifier schematic
  50. Blown power tube - a short story
  51. replace EL34 with EL37 !?
  52. Mono push-pull driver PCB
  53. Magnavox 139AA schematics, info?
  54. Anyone knows what driver tube on DowdyLama's GM-70......
  55. Building an amp around the QB5/1750 transmitter tube
  56. Instrument amp from '59 Lowrey donor chassis.
  57. cascoded gyrator loaded 6H9C to low idle.
  58. vacuum tube DAC and connection
  59. Dynaco ST70 II Right Channel Out
  60. ST70 Inrush Issue
  61. ECC88 OTL heaphone amp
  62. Help with deciding to build or buy Tube amp.
  63. Luxman LV-105 static on on channel
  64. equivlent of FU-50
  65. placing the volume control
  66. PP 300B ''transformer coupled''
  67. My First Tube Preamp
  68. Tube amp kit and speaker recommendations?
  69. First design GU81M SE triode
  70. Instruments & Amps forum - where is it?
  71. EL300 = 6FN5 / PL300 = 35FN5 tube
  72. 6U8 driving 45
  73. very low impedance white follower with 6H13C
  74. EL86 Any idea helps.
  75. 6112 and 6111 Mini-preamp
  76. Expert advice on what preamp to chose
  77. Harman Kardon DPR-7, Commander series pre/mixer
  78. input transformer - mumetal casing etc.
  79. SOHA headphone amp
  80. Using a single triode as a .......
  81. Sonic Frontiers SFP-1 Phono Stage
  82. Help!! with attenuation.
  83. power up inrush current limiter - anyone using?
  84. Audioromy FU-29, Latest Model 828A Mini Review
  85. Vertical-deflection
  86. Drilling a hole
  87. Edcor CXPP25-MS-8K V Triode Z-565
  88. bad opt measured values
  89. Mu Follower Driver for Push-Pull
  90. need datasheets for a phillips transformer if anyone has any
  91. Chicago power XFMR question.
  92. Help please on Christmas gift
  93. Audio Note P-zero
  94. SE EL34 Schematic - What do you think?
  95. Playing with hybrid amp: SRPP + MOSFET
  96. 300B filament supply question
  97. KT88 Parallel Push Pull
  98. cheating life out of old tubes?
  99. dBu transformer ratings
  100. Dared MP-2a3c mods
  101. Output transformers (Wolpert)
  102. Using Mains Transformers as Outputs
  103. Tube just for show...
  104. first project - first post - poddwatt
  105. High power CCS
  106. Analog Summing
  107. My new el34 + 12ax7 VCT amp. (Need Ideas For my first headphone vacuum tube amp Too~)
  108. cascode tubes
  109. High Fidelity by Pilot (circa 1953)
  110. Hardware help please
  111. integrated amps 100 per channel
  112. KT88 mounting question
  113. Output Transformer question
  114. Angstrom Thermionic
  115. ECC88 tube buffer NEEDED !
  116. Paralell SE 807 Amp design
  117. Putting together a tweaker friendly amplifier!
  118. Tube chassis
  119. DHT headphone Hybrid-CF+
  120. Looking for specs on this Beyer Xfmr
  121. Resistors for Berning EA-2101?
  122. Uneven Plate Glow
  123. Parafeed transformer sounds thin
  124. Lightbulbs as ccs
  125. My AWESOME First DIY amp
  126. Cary audio design SLI 80
  127. A1538 OPT?
  128. Genalex A2900 Keep or Sell?
  129. 6CB6 Spice Model wanted
  130. XFMR Help?
  131. 12 volt to 300 volt inverter question for tubes
  132. These amps should be verboten!
  133. how to use PCL86 instead of ecl86
  134. PSU for Aikido (4x 12SN7)
  135. SCA35 and AU-70
  136. Analisys of power amp limitations of tube bias range
  137. DIY Phono Preamp ??
  138. NOS 211 RCA or National Union?
  139. Iron Powder + Resin Output Transformer
  140. The Radio Hat Challenge
  141. EU regulations
  142. Transconductance for kt-90 in plain english
  143. Craftsmen RC-2
  144. Valve Amplification Company V100
  145. Parallel feed transformer with SRPP
  146. It's heeeeeere!- Valve Amplifiers 4th Edition
  147. opera consonance phonostage-PM1
  148. Anybody Explain this Preamp shematic?
  149. The high-voltage collection
  150. Input transformer topology question
  151. JE Labs 300Bdx stereo - troubleshooting
  152. battery operated 12/24/48 Volt multiple tube OTL
  153. Bringing up long-stored tube gear
  154. About RH84 three channel?
  155. MCC with Fisher
  156. Directly heated cathodes
  157. Build recommendation
  158. Ortofon KS 591 - informations
  159. Oatley K295-extra space for tubes
  160. A beginner's tube amp to drive a pair of fostex Fe103e
  161. Tame the beast.
  162. KT88 and Hammond Transformer
  163. B+ Drifts down after 2 hours
  164. Power amp sputters on turnoff
  165. Yet another EQP-1A
  166. How to bias 6SL7?
  167. 6CG7/6FQ7 = 6N5P (6Н5П)
  168. #27 mu stage
  169. Compactron Regulated Power Supply
  170. Best sounding voltage amplifier for hybride.
  171. PX25 to 300B pins
  172. de-gassing power tubes???
  173. Heathkit 51-29 output transformers issure
  174. 6AS7 Model
  175. 26H choke good enough for a grid or anode choke?
  176. Russian 6R2P for small amp.
  177. Power transformer primary is open.
  178. Rectifier oddness
  179. First Tube Build, Thoughts?
  180. Output Transformers
  181. Lazy Sunday 6SN7 Preamp
  182. Audio research VT200 Biasing & Schematic
  183. finished my new preamplifier!!
  184. What would be the correct output cap for this OTL Headphone Amp?
  185. Full Bridge Rectifier With Tubes
  186. Looking for data sheet for GE JAN 6146W/7212
  187. Best Valve pre-amp match for ME 550 amp
  188. Fisher 500c
  189. From old Philips tube books , just for tube audio DIY friends !
  190. UFO
  191. Adding a preamp?
  192. XS-225 valve amp circuit.
  193. LS7/CV1660 curves
  194. Differences between 12V6 tube and 12A6 tube?
  195. Please check my schematic
  196. 12W Push pull w/6C4C
  197. Tube Date Code
  198. For new members....
  199. Graphite ring on sweep tubes
  200. 6N6P tube - focus on
  201. Hot tube preamp pedal build
  202. Counterpoint Electronics/Counterpoint Acoustics/Counterpoint Audio
  203. Radford STA100 improvements?
  204. Playmaster unit 2 help needed!
  205. help me build an output transformer
  206. Vintage Magnavox tube amp
  207. Christmas Build, advice needed.
  208. Speaker suggestions for ST-70
  209. Tube markings?
  210. gaumont-kalee
  211. amplifiers audio research D90
  212. 40W Glass A 300B tube schematic needed.
  213. Hum in one channel only
  214. Water cooling Power Tubes
  215. Toroid Output Transformer from Plitron
  216. Scott LK-30 Assembly Manual Needed
  217. HUM STARTS 1 OR 2 HOUR AFTER THE AMP IS ON
  218. The best valve amp!
  219. Equivalents for 12AT7 and 6N11 ? (Sense G3 headphone amp)
  220. More probably stupid questions about feedback
  221. single stage amp?
  222. SS 83 again
  223. Making Spice Models for tubes
  224. Seth mk 2 ???
  225. Colorful inspiration
  226. Testing KT-90's Ei NIs Yugoslavia
  227. El Cheapo Transformer Question
  228. Why does the grid extend so far beyond the anode ?
  229. Valve amplifier identification
  230. E-M-field problem
  231. Effective cathode resistance
  232. Spectrum evaluation ECC82
  233. power d90-b
  234. el34, kt88, kt90, 6550 to 8417 conversion
  235. Do you know these capacitors?
  236. GRAAF GAAFiti WFB ONE - Schematic needed
  237. Oscillation WE417A
  238. EL84 fixed fixed bias
  239. Blown stereo
  240. 807/6au6 pure pentode mode amplifier
  241. help with ID'ing a tube
  242. Magnavox 50EH5 Stereo Amp
  243. My new Circlotron OTL tube power Amp.
  244. ideas for a tube eating guitair amp
  245. 6DE4, unused pins
  246. 300B what output transformer Sowter or Lundahl?
  247. 6DJ8 preamp w/balanced input - strange schematic
  248. Screen Grid Regulation Requirements
  249. Advice needed on new 6L6 ro 6V6 SE or SET build
  250. need a little help with an HK solo2 tube receiver

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