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  1. OPT linestage question
  2. 6AS7 preamp buffer
  3. 5u4g input capacitor
  4. Chassis metal advantages/disadvantages?
  5. Experience please: Tung-Sol 6L6GC STR
  6. Transformer winding resistances
  7. Oh my where to begin!? PTP related question.
  8. tube bayonet pin gone.
  9. Attn: Glass_painter - Pioneer SM-83 Transformers Dissected
  10. Please help ID this DIY tube monoblocks
  11. Amp thinks it's a receiver ??
  12. Anyone remember heathkit s99?
  13. Renovation of fifty years old tube amplifier
  14. Big Boss: a simple and basic el84 PP amp in progress
  15. Line Stage for Mikael SE KT88
  16. Philips EL3536
  17. Counterpoint SA-5000 P.S.U part identification needed
  18. 6GU7 in an Aikido?
  19. suggest about 9002/vt202 preamp please
  20. 7591a Alternatives
  21. tube rectifier plug in s-s replacement
  22. Oscillation in tube amps
  23. 6GT5 audio amp?
  24. Pin numbering, viewed from bottom or top?
  25. The Hybrid Class A amplifier
  26. 485V Regulated Power Supply
  27. 0B3 Glows Orange
  28. New Reissue tubes...Good/Bad???
  29. PP amp design , your thoughts please.
  30. Aikido + Phono section preamp
  31. Newcomb el84 amp
  32. Any Australians want to share shipping for valves from ESRC?
  33. 5718 Nuvistor ?
  34. Pentode Miller Capacitance, and which spec value to use?
  35. Brother can you spare a preamp design?
  36. Russian tube equivelants
  37. Another question about russian tubes
  38. Why match tubes?
  39. My XPP OTL Headphoneamp
  40. Simple heater question
  41. Need small SET transformer (12B4)
  42. Red Hot 6L6GC
  43. How do these curves look?
  44. Why does lowering screen voltage reduce headroom?
  45. Class A2 Direct MOSFET Coupled SE
  46. Best tubes for ~100w 1.9k p-p?
  47. Installing bleeding resistors
  48. RH84 finish!
  49. cathode biasing question
  50. Modding an old tube amp???
  51. Rectifier swap out?
  52. Please comment my F2a SE schematic
  53. E80CC aikido
  54. Heater wiring help!
  55. Differential output stage: cap voltage?
  56. 6C41C in a PSU regulator?
  57. Filament Wiring - Shielded vs. Twisted?
  58. Transformer reflected impedance games? Overspec'd output power?
  59. SE 6V6 cathode resistor value
  60. Very strange gremlins in my phono PS
  61. which kit to build - first kit ever
  62. Does anyone know the plate reistance of a 6CW7/ECC84
  63. Shindo Claret
  64. se, srpp, pcb design criteria
  65. Looks like a promising SE build ??
  66. Apologies to Alex Kitic- RH84 Three Channel?
  67. 6L6 AB1 Push-Pull
  68. Jadis JA-30
  69. Black Gate "snubbing"
  70. New Schematic - PP UL 6V6-types, CCS-fed
  71. build up a new line amp
  72. How do you make a DHT amp REALLY HUM FREE????
  73. Experience with AnTek OPTs?
  74. 6V6 PP AB1 circuit
  75. Help with powering down a trafo
  76. Physical orientation of transformers
  77. Which EL34 tubes for Hi Fi
  78. Choke input power supply, capacitor ratings
  79. EL36/6CM5 SE design critique
  80. New 6F6 Amplifier Project
  81. Transformerless Tube Amp
  82. GE sealants: which to use?
  83. Bias supply and grid current
  84. US Army Russian Electronics Dictionary
  85. Speaker Pop!
  86. Steve Bench RIAA preamp users
  87. Using James JS-6123HS with EL84 SE is overkilled?
  88. s5electronics 16ls schematic
  89. New to valve amps - given a 'project'
  90. Are there any loctal PC sockets?
  91. cheap and easy tube preamp
  92. Stereo bass problem
  93. SRS-360 East German transmitting tubes
  94. What the heck does a getter do ?
  95. Capacitor polarization help!
  96. MasterSound Tube Amplifier
  97. PC900 / EC900 curves
  98. 2x 12AX7 preamp fuse value
  99. Crackling Noise in Tube Amp (only) & PC Sound Card
  100. The Mullard 3-3
  101. Audio Research D125 Schematic?
  102. Glass B1. Need advise
  103. Computing or measuring anode curves w/ CFB
  104. Northlake PT ??
  105. Greatest circuit ever (or weirdest)
  106. Advise for nervous EL84 user
  107. K-12G problems
  108. Changing AC heaters to DC
  109. Phase change when adding gain stage?
  110. XiangSheng Amplifier
  111. Grid stopper resistor for 12B4A?
  112. Lundahl LL1620 SE-OPT : Ultra linear ?
  113. Thordarson transformers
  114. Electra Print & SAC ( Silk )?
  115. Audio Transformer articles I would like copies of !
  116. K-12 with headphones?
  117. cap wire lead covers
  118. Single ended amp, EL34, KT88 ideas??
  119. Wavebourn Pyramid - VII driver stage
  120. Mysterious OPT winding tap
  121. DHT…. Get rid of the Hum Pot!
  122. Operating Amp Without Load
  123. Looking for information on old thread
  124. Tube Leveling Amplifier
  125. Anyone with knowledge of the 12b4?
  126. 7695...useful audio tube??
  127. PSUD - How do interpret the results?
  128. Solder station
  129. preamp for pl504 amp
  130. Resistor after volume pot
  131. 6021 Amp project..looking for some input
  132. 807 SE project started....
  133. Fun with glow tubes, a success story
  134. OPT question
  135. Cheap and easy vacuum impregnation
  136. How to measure mains waveform safely?
  137. Wanted - High Power, High Voltage, Audio Frequency Transformer Manual.
  138. Aikido Resistor Help
  139. Changing 6SQ7 to 6SL7 in SE amp
  140. Multi-tap OT
  141. harmon kardon a700 amp output trafo impedance
  142. An SE 813 OPT?? SP. Wound??who zat?
  143. Tube rectifier to diode
  144. The Trioderizer
  145. increasing coupling capacitor value in we 91
  146. diy SE Tube Amp
  147. Max power possible from 6L6 with 6.6k load?
  148. OPT grounding question
  149. SE sound vs Ultra Linear sound
  150. Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5
  151. 6N6P or E182cc spice
  152. Ecl82
  153. Zeiss Ikon Dominar L Amplifier
  154. Beginners attempt at SE 6EM7
  155. Subbing a 5751 with a 5755
  156. Sophia Electric 300B tube
  157. Screen drive and other P-P experiments
  158. Amplifier using a 833A
  159. Circuit help
  160. How much mis-match can an OT take?
  161. SE load mismatch, 8 or 6 or 4 ohms?
  162. Magnavox 196-BA => RH 84 conversion
  163. 40W class A push pull amp with JJ 2A3-40w possible?
  164. "Designing tube preamplifier" article
  165. Valve Tester Guru Help
  166. 6GB5 and Variants as Screen Driven Amps
  167. Gyrator Question
  168. Suggestion Please - Curcuit Simulation & PCB Design Software
  169. Starting to understand.....
  170. Aureavox Arcana 81
  171. Impedance question
  172. spare transformer wires?
  173. Capacitors and maximum voltage ratings
  174. Do Sweep tubes Glow Blue?
  175. Any way to upgrade this circuit? (V. 40's phono amp.)
  176. About tube "matched pairs"
  177. Testing Gm without tube tester
  178. Best place to get Shuguang 300B tubes
  179. Old metal tubes
  180. 300B pushpull- A new schematic
  181. Drake transformer
  182. TL Audio VP-5051 Valve voice processor
  183. Vtl 750
  184. DC-coupling of tube stages
  185. ThermalTrak transistor application.
  186. weird old amp:need help
  187. Triode Electronics Mark III
  188. Scavenging a broken oscilloscope to turn it into a preamp ?
  189. Scott LK150 transformer
  190. Tube Amp / Pre-amp kit?
  191. anything that can go as a Rp.....
  192. Genelex gold lion el84 reissue - ARCING
  193. Bias Current Mythbuster?
  194. Exactness of feedback capacitors?
  195. 5608a
  196. You know that you are having a bad day when.......
  197. 1U5 amplifier design, Newbie
  198. 12AU7 Pre-amp Schematic Question
  199. Beam pentodes and suppressor-grid pentodes of same type
  200. Quick question about CT and FWB
  201. Frank's 6SN7 line stage / preamp with GlassWare PS-1?
  202. SimpleSE OP Hammond bigger than the 125ESE
  203. Speaker impedance linearisation
  204. Differential filter circuit: biasing problem
  205. Curves for 12AH7
  206. Schematic for Audio Note Japan Kassai
  207. Help with schematic understanding
  208. SEPP output transformer
  209. Fixed bias design question
  210. Strange bias circuit. WTF?
  211. 5687 preamp transformer
  212. Anyone know of a dual pentode suitable for a LTP.
  213. Output transformer current and power ratings
  214. Diodes to protect OT's..
  215. Speakers for tube amps
  216. Help on power supply
  217. Line output transformer question
  218. Screen Drive Push Pull ideas
  219. 12AT7/46 Direct Reactance Drive Amp
  220. Bridge rectifier vs Full wave rectifier
  221. Isolation Transformer Question
  222. Glow tubes as series regs ?
  223. Glow tube shunt reg stability
  224. Some interesting reading about Sweep tubes
  225. What is this?
  226. What's A "Timber bulb"?
  227. aikido/807PSE and local feedback
  228. Optoisolator compressor ideas
  229. Airgap for filament transformer ?
  230. Tube stereo for E 60 including TDA1541 cd player
  231. Theta Amp problem
  232. 12A_7 vs 6SN7EH vs EF86?
  233. Mixing two channels in the preamp or at the phase splitter?
  234. amp input cap for crossover
  235. Audio Transformer/Cathode Feedback Info
  236. Determining cathode resistor
  237. Tube Pin Schematic Question
  238. Best looking tube?
  239. Identifying Stancor Power transformers
  240. HT crowbar
  241. "Bevois Valley" in triode, what to do with the feedback?
  242. Purple Glow
  243. When to use a grid leak resistor?
  244. Mcintosh MA 2275
  245. Blowing output transformer
  246. Kenwood KW-44 hum
  247. Tube system for classical audio
  248. Novel method to reduce filament hum in SE Amp?
  249. Help with 6SN7 w/ CCS
  250. Fisher X-101-D

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