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  1. Breaking in your tubes?
  2. 6SN7 equivalents in B9A
  3. Figuring out how many watts I need
  4. How do I tell whether a different replacement output transformer will be ok?
  5. OPT linestage question
  6. 6AS7 preamp buffer
  7. 5u4g input capacitor
  8. Chassis metal advantages/disadvantages?
  9. Experience please: Tung-Sol 6L6GC STR
  10. Transformer winding resistances
  11. Oh my where to begin!? PTP related question.
  12. tube bayonet pin gone.
  13. Attn: Glass_painter - Pioneer SM-83 Transformers Dissected
  14. Please help ID this DIY tube monoblocks
  15. Amp thinks it's a receiver ??
  16. Anyone remember heathkit s99?
  17. Renovation of fifty years old tube amplifier
  18. Big Boss: a simple and basic el84 PP amp in progress
  19. Line Stage for Mikael SE KT88
  20. Philips EL3536
  21. Counterpoint SA-5000 P.S.U part identification needed
  22. 6GU7 in an Aikido?
  23. suggest about 9002/vt202 preamp please
  24. 7591a Alternatives
  25. tube rectifier plug in s-s replacement
  26. Oscillation in tube amps
  27. 6GT5 audio amp?
  28. Pin numbering, viewed from bottom or top?
  29. The Hybrid Class A amplifier
  30. 485V Regulated Power Supply
  31. 0B3 Glows Orange
  32. New Reissue tubes...Good/Bad???
  33. PP amp design , your thoughts please.
  34. Aikido + Phono section preamp
  35. Newcomb el84 amp
  36. Any Australians want to share shipping for valves from ESRC?
  37. 5718 Nuvistor ?
  38. Pentode Miller Capacitance, and which spec value to use?
  39. Brother can you spare a preamp design?
  40. Russian tube equivelants
  41. Another question about russian tubes
  42. Why match tubes?
  43. My XPP OTL Headphoneamp
  44. Simple heater question
  45. Need small SET transformer (12B4)
  46. Red Hot 6L6GC
  47. How do these curves look?
  48. Why does lowering screen voltage reduce headroom?
  49. Class A2 Direct MOSFET Coupled SE
  50. Best tubes for ~100w 1.9k p-p?
  51. Installing bleeding resistors
  52. RH84 finish!
  53. cathode biasing question
  54. Modding an old tube amp???
  55. Rectifier swap out?
  56. Please comment my F2a SE schematic
  57. E80CC aikido
  58. Heater wiring help!
  59. Differential output stage: cap voltage?
  60. 6C41C in a PSU regulator?
  61. Filament Wiring - Shielded vs. Twisted?
  62. Transformer reflected impedance games? Overspec'd output power?
  63. SE 6V6 cathode resistor value
  64. Very strange gremlins in my phono PS
  65. which kit to build - first kit ever
  66. Does anyone know the plate reistance of a 6CW7/ECC84
  67. Shindo Claret
  68. se, srpp, pcb design criteria
  69. Looks like a promising SE build ??
  70. Apologies to Alex Kitic- RH84 Three Channel?
  71. 6L6 AB1 Push-Pull
  72. Jadis JA-30
  73. Black Gate "snubbing"
  74. New Schematic - PP UL 6V6-types, CCS-fed
  75. build up a new line amp
  76. How do you make a DHT amp REALLY HUM FREE????
  77. Experience with AnTek OPTs?
  78. 6V6 PP AB1 circuit
  79. Help with powering down a trafo
  80. Physical orientation of transformers
  81. Which EL34 tubes for Hi Fi
  82. Choke input power supply, capacitor ratings
  83. EL36/6CM5 SE design critique
  84. New 6F6 Amplifier Project
  85. Transformerless Tube Amp
  86. GE sealants: which to use?
  87. Bias supply and grid current
  88. US Army Russian Electronics Dictionary
  89. Speaker Pop!
  90. Steve Bench RIAA preamp users
  91. Using James JS-6123HS with EL84 SE is overkilled?
  92. s5electronics 16ls schematic
  93. New to valve amps - given a 'project'
  94. Are there any loctal PC sockets?
  95. cheap and easy tube preamp
  96. Stereo bass problem
  97. SRS-360 East German transmitting tubes
  98. What the heck does a getter do ?
  99. Capacitor polarization help!
  100. MasterSound Tube Amplifier
  101. PC900 / EC900 curves
  102. 2x 12AX7 preamp fuse value
  103. Crackling Noise in Tube Amp (only) & PC Sound Card
  104. The Mullard 3-3
  105. Audio Research D125 Schematic?
  106. Glass B1. Need advise
  107. Computing or measuring anode curves w/ CFB
  108. Northlake PT ??
  109. Greatest circuit ever (or weirdest)
  110. Advise for nervous EL84 user
  111. K-12G problems
  112. Changing AC heaters to DC
  113. Phase change when adding gain stage?
  114. XiangSheng Amplifier
  115. Grid stopper resistor for 12B4A?
  116. Lundahl LL1620 SE-OPT : Ultra linear ?
  117. Thordarson transformers
  118. Electra Print & SAC ( Silk )?
  119. Audio Transformer articles I would like copies of !
  120. K-12 with headphones?
  121. cap wire lead covers
  122. Single ended amp, EL34, KT88 ideas??
  123. Wavebourn Pyramid - VII driver stage
  124. Mysterious OPT winding tap
  125. DHT…. Get rid of the Hum Pot!
  126. Operating Amp Without Load
  127. Looking for information on old thread
  128. Tube Leveling Amplifier
  129. Anyone with knowledge of the 12b4?
  130. 7695...useful audio tube??
  131. PSUD - How do interpret the results?
  132. Solder station
  133. preamp for pl504 amp
  134. Resistor after volume pot
  135. 6021 Amp project..looking for some input
  136. 807 SE project started....
  137. Fun with glow tubes, a success story
  138. OPT question
  139. Cheap and easy vacuum impregnation
  140. How to measure mains waveform safely?
  141. Wanted - High Power, High Voltage, Audio Frequency Transformer Manual.
  142. Aikido Resistor Help
  143. Changing 6SQ7 to 6SL7 in SE amp
  144. Multi-tap OT
  145. harmon kardon a700 amp output trafo impedance
  146. An SE 813 OPT?? SP. Wound??who zat?
  147. Tube rectifier to diode
  148. The Trioderizer
  149. increasing coupling capacitor value in we 91
  150. diy SE Tube Amp
  151. Max power possible from 6L6 with 6.6k load?
  152. OPT grounding question
  153. SE sound vs Ultra Linear sound
  154. Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5
  155. 6N6P or E182cc spice
  156. Ecl82
  157. Zeiss Ikon Dominar L Amplifier
  158. Beginners attempt at SE 6EM7
  159. Subbing a 5751 with a 5755
  160. Sophia Electric 300B tube
  161. Screen drive and other P-P experiments
  162. Amplifier using a 833A
  163. Circuit help
  164. How much mis-match can an OT take?
  165. SE load mismatch, 8 or 6 or 4 ohms?
  166. Magnavox 196-BA => RH 84 conversion
  167. 40W class A push pull amp with JJ 2A3-40w possible?
  168. "Designing tube preamplifier" article
  169. Valve Tester Guru Help
  170. 6GB5 and Variants as Screen Driven Amps
  171. Gyrator Question
  172. Suggestion Please - Curcuit Simulation & PCB Design Software
  173. Starting to understand.....
  174. Aureavox Arcana 81
  175. Impedance question
  176. spare transformer wires?
  177. Capacitors and maximum voltage ratings
  178. Do Sweep tubes Glow Blue?
  179. Any way to upgrade this circuit? (V. 40's phono amp.)
  180. About tube "matched pairs"
  181. Testing Gm without tube tester
  182. Best place to get Shuguang 300B tubes
  183. Old metal tubes
  184. 300B pushpull- A new schematic
  185. Drake transformer
  186. TL Audio VP-5051 Valve voice processor
  187. Vtl 750
  188. DC-coupling of tube stages
  189. ThermalTrak transistor application.
  190. weird old amp:need help
  191. Triode Electronics Mark III
  192. Scavenging a broken oscilloscope to turn it into a preamp ?
  193. Scott LK150 transformer
  194. Tube Amp / Pre-amp kit?
  195. anything that can go as a Rp.....
  196. Genelex gold lion el84 reissue - ARCING
  197. Bias Current Mythbuster?
  198. Exactness of feedback capacitors?
  199. 5608a
  200. You know that you are having a bad day when.......
  201. 1U5 amplifier design, Newbie
  202. 12AU7 Pre-amp Schematic Question
  203. Beam pentodes and suppressor-grid pentodes of same type
  204. Quick question about CT and FWB
  205. Frank's 6SN7 line stage / preamp with GlassWare PS-1?
  206. SimpleSE OP Hammond bigger than the 125ESE
  207. Speaker impedance linearisation
  208. Differential filter circuit: biasing problem
  209. Curves for 12AH7
  210. Schematic for Audio Note Japan Kassai
  211. Help with schematic understanding
  212. SEPP output transformer
  213. Fixed bias design question
  214. Strange bias circuit. WTF?
  215. 5687 preamp transformer
  216. Anyone know of a dual pentode suitable for a LTP.
  217. Output transformer current and power ratings
  218. Diodes to protect OT's..
  219. Speakers for tube amps
  220. Help on power supply
  221. Line output transformer question
  222. Screen Drive Push Pull ideas
  223. 12AT7/46 Direct Reactance Drive Amp
  224. Bridge rectifier vs Full wave rectifier
  225. Isolation Transformer Question
  226. Glow tubes as series regs ?
  227. Glow tube shunt reg stability
  228. Some interesting reading about Sweep tubes
  229. What is this?
  230. What's A "Timber bulb"?
  231. aikido/807PSE and local feedback
  232. Optoisolator compressor ideas
  233. Airgap for filament transformer ?
  234. Tube stereo for E 60 including TDA1541 cd player
  235. Theta Amp problem
  236. 12A_7 vs 6SN7EH vs EF86?
  237. Mixing two channels in the preamp or at the phase splitter?
  238. amp input cap for crossover
  239. Audio Transformer/Cathode Feedback Info
  240. Determining cathode resistor
  241. Tube Pin Schematic Question
  242. Best looking tube?
  243. Identifying Stancor Power transformers
  244. HT crowbar
  245. "Bevois Valley" in triode, what to do with the feedback?
  246. Purple Glow
  247. When to use a grid leak resistor?
  248. Mcintosh MA 2275
  249. Blowing output transformer
  250. Kenwood KW-44 hum

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