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  1. 6N1P-EV Voskhod or Anod manufactured better sounding?
  2. help with long tail pair bandwidth
  3. Anyone have both an Eico HF-81 and Akai M-8?
  4. Sylvania Engineering Sample 12ax7
  5. Between 5AR4/GZ34, 6CH3/6CJ3 and 6D22S anode resistance
  6. One-tube simple amplifier sound experiment
  7. CK1006 ignition voltage?
  8. First build- dual mono octal linestage
  9. schematic for Baldwin 3 chan organ amp
  10. output transformer inquiry.
  11. 807 triode strapped amp - few questions
  12. HV power supply with filament bias
  13. newbie with oldie! (klemt m40 valve amp)
  14. too high voltage supply HELP
  15. 6Y6G Triode Curves
  16. A Tube buffer question from a Tube newbie
  17. Marantz 7c Question - HELP !
  18. Western Electric 555 receiver (Horn Driver)
  19. Getter heater & B+ sequencing ?
  20. Tube Amplifier with 30P1S SE
  21. Little OTL / Class " A "
  22. ATC SEMITEC DIODE, CURRENT REGULATOR
  23. seperate heater transformer advice please
  24. MQ 420-SL OTs
  25. Frequency Response of Williamson Amplifier in LTspice
  26. Edcor transformer upgrade for K12G tube amp?
  27. Transformers placement under PCB
  28. OT PP Hashimoto HW-100-5 tube amp?
  29. Winding an output transformer for headphones ? Some questions
  30. Push Pull OPT Primary Impedance
  31. Tube compliment substitution question. 6gw8 to ?
  32. Watts or Db/watt ?
  33. A question about the OPT Design Assistant software and Impedance matching
  34. XF86
  35. GM70 OTL ???
  36. Output transformer impedance matching
  37. Distortion in 1 channel
  38. need to know operating voltage for 6f6 tube amp
  39. The 2A3 build is in dream state
  40. Alembic F2B clone hum & noise
  41. Spice Question
  42. Are large SE amps like 211/845 viable!
  43. Power transformer & heater wiring questions
  44. Parallel KT88 SET Amp
  45. Why people keep talking about using pentodes in triode mode for power amp?
  46. Mono series attenuators vs. PEC for balance control?
  47. TubeTech e813cc Pair for sale on eBay.
  48. Help with new pp kt77
  49. Is 5 Watts enough?
  50. First amp advice for a Newbie
  51. Tube/valve stuff in Tokyo
  52. Advice for a neophyte
  53. EML300B reliability
  54. User's Manual Golden Tube SEP1
  55. DIY to compete with commercial
  56. Ferrite Core vs. Laminations for 2 watt OPT
  57. generating burst waveform in OrCADŽ Capture program
  58. O.T. with Litz wire
  59. Valve upgrade T.A.C. 34MK
  60. Another KT88 SE Abdellah with bias issues
  61. Lowering plate dissipation
  62. A helping hand with a diyed 5687 pre, anyone?
  63. Curtis Mathes Royal Dane
  64. Buzzing decreasing with volume
  65. Fluro Ballast as DIY choke?
  66. 5R4GA ws 5R4WGB
  67. Vintage Webcor Reel to Reel Cap Value Replacement
  68. Coupling Capacitor question
  69. Aikido preamp: 12AU7 or 6CF7/6FQ7 ???
  70. Help needed to identify this Knight Mono Integrated Amp
  71. Winding my own OT
  72. Need a scope screenshot/photo of a Tube clipping
  73. isolating tube sockets
  74. tube cathode bias question: resistor / diode
  75. Silicon Chip mag "Currawong" amp
  76. Vibration spec of 6L6GC ?
  77. Output Transformer Question
  78. 6V6/6l6/EL34/KT66/KT77/6550/KT88 Primaries/ input/loads
  79. Question about HK Citation V schematics
  80. Multi-purpose Tube Preamp - need some help
  81. Vacuum Tube Workshop
  82. Constant Current Heater Source
  83. Tube amp channel loading
  84. Sexy Westra loudspeakers looking for a match
  85. KT90 parallel push pull design
  86. Beard P100 mk1 owners? And some questions.
  87. Hybrid OTL amplifier
  88. heater issue?
  89. negative bias supply
  90. The hardest part about a DIY tube amp is.....
  91. 6N2P-EV driving 6C33
  92. DIY THD Tube Tester / Analyzer
  93. 2.3 watt x 4 or 5 watt x2 SET amplifier using DECWARE Zkit1 and Zkit4 schematics
  94. Cathode follower topology
  95. Line level connected direct to split phase on EL34 PPP?
  96. 13E1 Stereo Single Ended Amp
  97. Apex PA94 Opamp Power Tube Driver
  98. STEM Amplifier Final Pre-Build Checkpoint
  99. thoriated tungsten triodes tetrodes pentodes
  100. BAT-VK 60 Pls help need repair ;(
  101. Switching on an old amplifier?
  102. elevated filament voltages
  103. Opinnions on Gold Lion KT77
  104. DIY Tube amplifier, Transformer question.
  105. EF42 for audio applications
  106. strange Tungsram tube
  107. Schematics TVA Mentmore M100 M200
  108. A Thordarson amp project
  109. Help: Tubes for my amp
  110. McIntosh mc40 power transformer
  111. Counterpoint SA-1 preamp schematics?
  112. What would a larger OPT get me?
  113. National VP-311C Tubescope help...
  114. 12AU7 - 12.6V DC heater wiring - noob
  115. I bought a box of tubes at an estate sale today
  116. Thermistors to prevent heater current inrush?
  117. can SE bass be as good as PP ?
  118. 2A3 cathode resistor/cap question
  119. class a output ct basic question
  120. Recent popularity of Leak TL-12
  121. bleeder resistor placement w/ power supply choke
  122. cd burner hum w tube stereo
  123. Clipping - Saturation or Mismatching Impedance?
  124. Transformer for K12g tube amp
  125. PowerTrannyHeatRemovalViaHeatSinkRadiatorPassive
  126. "Novel" push pull driver circuit
  127. Feedback lead/lag compensation
  128. help with Signature Technology mono amp
  129. 7591
  130. EL34 integrated amp power loss
  131. Use treble or bass amp for midrange?
  132. Question about a SET 2A3/45
  133. western electric 124 amplifier
  134. el34 power loss in right channel
  135. Ei Silver Plate 12AX7 cathode color ?
  136. Does parafeed really improve sound?
  137. Can I use this choke
  138. Calculating 6922/E88CC/ECC88 cathode follower for 90V anode
  139. ST70 coupling caps eyelet location on PC-3?
  140. Some help with PCL86 Headphone amp Project
  141. Top (sound) quality valve phono stage
  142. Calculating cathode follower using 12AU7 for 90V supply
  143. Cathode resistor
  144. Help with an old Capitol
  145. Cathode bypass cap
  146. balanced post-OT line output?
  147. Blown SE mono, troubleshoot
  148. What is this circuit for?
  149. Siemens EL 86 NOS?
  150. Valve Operational Amplifiers
  151. What will be the best drive to 211 tube?
  152. Dual 845 SE A2 questions
  153. Harman Kardon Citation I, II, & III (Special thanks to Jim McShane and Eli Duttman!)
  154. Heater rewiring from 6N2 to 12AX7 with 6.3VAC
  155. heater bias value
  156. the hum or is it a siliconray kit
  157. DC Automatic Bias Control - Auto fixed bias
  158. What makes an OT a good OT for audiophile and need suggestion.
  159. The totally capless DHT SET amp - 300B or others
  160. Angled Socket brackets?
  161. Octal or loctal tubes as cathode follower?
  162. Used int amp please help to figured out?
  163. Rod Coleman heat sink question
  164. Tubelab SE + Fostex fe206en vs room size! suggestions needed please!
  165. ef86 pentode/triode switch: voltage rating?
  166. Input to pre-amp
  167. EML 300B
  168. Need suggestion in building a stereo power amp
  169. VALVO EL84 and ECC83 TELEFUNKEN ID?
  170. Bogen E-75 tube amp
  171. Quad II amplifier needed for parts
  172. Low voltage 6N1P RIAA?
  173. Does anybody collect vacuum tube ADV
  174. HDMI connection causes hum on Quad 303
  175. ECC81/12AT7 "sweet spot"
  176. Phono Preamp Hum
  177. Benefits of high voltage source for preamp
  178. Auto Bias
  179. Thomas Mayer Sound Processor pics
  180. Have you used the 15A6 pentode as an audio output tube ?
  181. Can I use a 5 volts tap for 6SN7 heaters?
  182. Any opinions about this tube amp kit ?
  183. 300B odd behaviour
  184. Aikido starter help requested
  185. 10Y FILAMENT VOLTAGE MARGIN
  186. Wiring a multitap transformer. Help needed
  187. A directly heated pentode folded cascode
  188. Zener Power Supply Clamp
  189. SPICE Simulator Giving Negative Gain
  190. SE 811 amp schematic...
  191. Philco Labled 12AU7A black-plate 45' halo getter- Raytheon??
  192. My FrankenAmp
  193. Panel Meter Install
  194. New Amp With Hum...
  195. EF184-6j51p Load by CCS or Resitor
  196. Slew rate.. Something doesn't make sense to me.
  197. HK Citation V question
  198. Modifying a tube regulator
  199. 6BG6 Push Pull Parallel Amp Build
  200. adapting a FU32 Tube amp for QQE 03/20 tubes?
  201. audio innovations 500 one channel down?
  202. Questions about found Mullard xf1's
  203. SE 6BL7
  204. Sound Valves M60 schematics needed
  205. el34 class a mod advice please
  206. 12AU7 Genuine or remarked
  207. MIT, Triode amp cathode resistor load line
  208. Marry tube preamplifier with 2-Band Wien bridge equalizer
  209. Oddball tube question
  210. 6H2n-EB Strange Codes??
  211. Triode Dick's KT88 PP Amp.
  212. Curves to EL 502 and EL 300
  213. Input level 1/2 ECC83 + EL84
  214. Cincinatti Mac Amps
  215. ss rectifier filter recommendate
  216. Determining plate current with non-standard screen grid voltages
  217. allnic hpa-5000
  218. Hodgepodge build
  219. Power Transformer weirdness/wiring problem
  220. Question trafo for Broskie Janus PSU
  221. Copland CVA-306 tube and output capacitor replacement
  222. Choice of Output Transformer
  223. Jumping in with both feet
  224. Large 9pin socket needed
  225. Line-up of old and currently produced RIAA Stages with tubes wanted (like EAR-834)
  226. Question about 6P31S
  227. 6N16B Aikido Cathode Resistors
  228. 1KV umbilical cords.... and other HV issues
  229. 300b Bewitch Amp Blows Fuses
  230. Dynaco ST-70
  231. Front-end topologies for PP
  232. tranformers
  233. How many LesBox units exist out there?
  234. Old Sylvania black-plate bent getter 12au7s
  235. Phono / pre amp section schematic suggestions
  236. 4P1L in parallel Single Ended
  237. Pair of Ampex 620 amps
  238. My SE 6S4S
  239. chinese ebay 12au7 + 6dj8 white cathode follower preamp boards?
  240. "chirp" when power up amplifier
  241. Modified Dynaco PAS Phono
  242. Filter Chokes wired for CMR
  243. Capacitors / K12G Tube Amp
  244. Sansui SM-30
  245. RCA Phono Preamplifier with 12ax7
  246. separate filament transformer for 5u4g?
  247. EL34 Triode strapped amplifier
  248. Testing emission without risk
  249. Anyone Build the Borbely 15W 6C33C SE?
  250. Cheap and upgradable preamp

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