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  1. Aikido Line Stage / Buffer
  2. JJ KT88s and other octals
  3. Triodes from Russia
  4. Little help needed / do I have a bad tube or really good tube?
  5. 5.1 channel 807 SE amplifier
  6. Plate loaded 6N6P over SRPP 6N6P any day of the week...
  7. Voltage multiplier vs transformer for preamp HV power supply
  8. does tube bias drift like silicon devices
  9. Best EL34 For Triode mode
  10. ASL AQ 1002 PP KT88 problem with input stage
  11. 2A3 Amp schematic suggestions?
  12. what I need for safe use mercury rectifier
  13. Anybody listened to Glow Audio?
  14. Tubes too close to output transformers?
  15. Help with stereo to mono for project
  16. MC3500 with 807 tubes and modern driver tubes
  17. I need a project......preferably a HIFI amp..........
  18. REN904 for linestage?
  19. Urgent advice on Chinese purchase please!
  20. VR tubes, minimum current
  21. Senior Project Tube Preamp
  22. Antek AS-4T430 measurements
  23. small, light dc coupled 6ea7 amp sanity check
  24. 6S33S SE Transformer Set
  25. I think I blew my amp!! plase help
  26. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  27. Music Angel XD-850MKIII 300b integrated amp
  28. 8150's
  29. More junk from China
  30. 6GM8 above 8mA/24V
  31. One Tube Sound Better Than Four?
  32. HK Citation V rebuild - any advice?
  33. 6GM8/ECC86
  34. Sound Valves vtp-101 Schematic
  35. ~17-18w sweep tube with large plate cap
  36. Fisher 500B Comparison
  37. New build of P-P PCL86 Amp
  38. Transformer question
  39. Can 110V Quad IIs be configured to 220V?
  40. Advice needed re repairing Audio Research VT100
  41. Yaqin SD-CD3 Tube Buffer - upgrading caps
  42. Gyrator PSU's in tube amps
  43. EL34 Amp Running KT66, Safe ?
  44. MJ Optimized Valve Regulator
  45. Need JAN 6418 tube stereo headphone preamp kit advice!
  46. Electronic choke
  47. Can you please help identifying this amp?
  48. [TubeAmp] Beginner's questions
  49. .47uF output cap to 1uF?
  50. Spark gaps on output transformers
  51. St 35 or St 70?
  52. Pi wound output transformers
  53. miniatures 6n1p 6n2p
  54. HK Citation V schematic?
  55. Physical Oscillating noise from phono stage
  56. PP 6c33c-b
  57. Modifying the classic Williamson
  58. eimac 152TL and 304TL
  59. LTspice model for Dynaco A470 Output Transfomer
  60. audiodesignguide.com PP KT88
  61. One more 4P1L SE
  62. Mount rectifier above torroidal transformer?
  63. Extending Tube Sockets off a PCB
  64. Looking for a great starter stereo P-P amp
  65. Question regarding value of Telefunken tubes.
  66. Magic Eye tube
  67. Partridge Transformers
  68. 6CG7 replacing E88CC in SE KT88 Amp.
  69. Omit the filament windings -- LTM8033 from Linear
  70. Best position for bleeder resistor?
  71. anyone have experience with a Radio Craftsmen C400?
  72. Amp-A, a variation to the EL84 Push Pull theme
  73. tony's 6LU8 push-pull power amp build
  74. First Post Here
  75. MFA Lumi sings high-pitched tunes
  76. Power tubes not drawing current
  77. replacing tubes with circuitry
  78. High Voltage Regulators (Maida or zener)
  79. GU-81m tube amp schematics???
  80. Suggestions on SIPP driver stage
  81. How to eliminate the "white noise" for the 300B tube amp?
  82. 6BQ5 UL Curves?
  83. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  84. 6N1P and 6N6P OTL headphone amp
  85. New Project
  86. Understanding Steve Bench's regulated power supply
  87. Preamp with buffer design
  88. JP200 preamp?
  89. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  90. New Tube Manufacture?
  91. Lowering B+ in PS
  92. Rectifier tube blows
  93. direct coupling
  94. Need some help with these tubes
  95. Edcor GSXE10-8-5K primary Inductance?
  96. My "Red board" chassis
  97. PP EL34
  98. Building something better with a Chinese SE EL34B Amp DIY Kit
  99. Problem with my amp, and I have run out of ideas
  100. Value of coupling caps
  101. Stepped Attenuator for AI Modulus IIA
  102. Tubes are beautifully colored....right?
  103. Differential Input for Aikido Amp?
  104. My Best OTL Amplifier
  105. Valve testing machine
  106. Line stage with 12AU7 and 6CG7 anyone?
  107. MingDa MC845-C or Opera COnsonance Reference 9.9
  108. Lower gain 12AX7?
  109. Needed: schematic for Ming Da MC34ab
  110. Solid State Cathodyne Phase Splitter Device?
  111. My Wave Isn't Square.
  112. 6J7 driver in WE91 like amplifier
  113. F2a - C3m Monkey
  114. balanced/unbalanced questions decision time
  115. Stern's saville double 6
  116. GM70 psu transformer.
  117. Antek toroidal vs Edcor?
  118. current production pentode, I_a ~ 8mA
  119. Brook 10c clone
  120. Unknown lamps need help
  121. What's wrong with this?
  122. Microphonics from C0G Caps across Heaters
  123. Yarland FV34CIII vs Synthesis Nimis
  124. 12AT7 and TDA1543...
  125. Eico Hf-81 Integrated Amplifier
  126. Tubed voltage regulator for KT88se amp, need help ?
  127. 1st post what can i build with this?
  128. CJ PV-3 voltage values for schematic
  129. From KT90 to KT88
  130. side by side bifilar windings in excess of 1000 volts
  131. looking for a great tube amp book.
  132. Revox G36 Mod for preamp
  133. 33 in triode mode...any experience ?
  134. Help with Decware Zen EL84 SET
  135. Find schematic of amplifier mcintosh mc 275 mkiv
  136. Heater wiring - Coaxial?
  137. now mono blocks!
  138. Heathkit AA-40 or AA-121
  139. UTC o-9 ouncers for headphone amp?
  140. Help modify 6H30 Mu-follower stage
  141. Help me to identify unknown tube
  142. Choke orientation (Need help)
  143. push pull 813 tube in ultra linear mode
  144. AD1865 DAC + 6SN7 analogue stage
  145. Inexpensive tube amplifier kits?
  146. SET amp/speaker issue.
  147. No pre-Amp - Pre Amp
  148. Found a CHEAP source of output transformers in Europe
  149. How calculate cathode LEDs biased
  150. ESR test for tube amps ?
  151. asking help/knowledge asked: luxman d105u output stage
  152. Have you ever seen a 4 pin blue Alps pot??? need help
  153. Any ideas on this one???
  154. Why not 6C41C used in OTL??
  155. 6p14p(EL84) SE with 6n6p build jurnal
  156. Oscilloscope - Which one should I get ? What to look for?
  157. "Jonokuchi" - new desktop amp, or "Little red board"?
  158. Robust Driver stage recommendations
  159. Wireless World valve articles from the past
  160. Overshoot and Ringing
  161. Harman Kardon A50K
  162. HiFi Tube amp project
  163. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  164. Tone control - good diagram needed
  165. Dolby AC3 coming on nicely.
  166. Power Supply Question
  167. Dynatuner FM-1 Restoration
  168. faulty audioromy 6550 no output and very faith sound please help
  169. just one tube preamp or driver
  170. Power triode preamp a different way
  171. 49.95 Tube amp?!
  172. Which cap for the Musical Machine?
  173. How much power do I need in the kitchen?
  174. Grounding check for SE 300B amp
  175. Suggest me a build for HD600 headphones
  176. 6BQ5 Screen Voltage Regulator
  177. 6SN7 Tubes
  178. My first tube Amplifier VT4C DIY record
  179. Amplifier output wattage test
  180. Troubble shooting help please.....
  181. Heater Wiring
  182. 220/110 step down in reverse ... and more
  183. Input Level Devil please help
  184. Soft start for a preamp?
  185. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  186. Using one KT77 and one EL34 per side?
  187. Help identifying transformer wires.
  188. tube pre and tube power amp
  189. Spice Models for Tubes w Screen Grid by Gurski
  190. Theremin project needs some help!
  191. Transformer abuse or other use
  192. aikido heater voltage
  193. HY51Z datasheet, help !!!
  194. 6L6 amp with unique phase splitter - check my math
  195. Dynaco A451 Output Transformer
  196. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  197. 6AU6 preamp problem
  198. Help identifying a Telefunken(?) tube...
  199. UCC85 and e-pay
  200. Lundahl LL1676 - missing data
  201. valve phono pre-amp HELP needed
  202. Preamp pcb
  203. Strange Problem In Tube Amp Build
  204. Output transformer question
  205. Replacing ECL86/6GW8 to PCL86(14GW8)???
  206. On or Off?
  207. Neg-Feedback into Grid of gain stage instead of cathode?
  208. Accuphase F-25 Japanese manual translation help!
  209. Negative supply with CT tranny
  210. E130L SE again
  211. tony builds a 7N7 preamp
  212. Tango 10429 78% Nickle Output Transformer?
  213. Bias for Ipod Input
  214. What about this driver????
  215. allen organ amp 75
  216. Needs help Tubezone Poseidon
  217. Lightbulb trick on filament circuit?
  218. AMC CVT3030a Help for repair
  219. TF110-48/UL in the UK?
  220. hum in pas2
  221. Aikido Cathode Follwer Question
  222. Question Regarding a Partial Feedback 807 SE
  223. Leftover transformers
  224. Newbie "In Search of help"
  225. ELL80/ECLL800 Cathode follower
  226. The "Tube" bookshelf
  227. knight KG-240? low output help
  228. JE lab 2a3 , fizzy, squeal in one channel, help
  229. Trouble with a DIY EL34 Tube Amp Kit
  230. SPICE Transformer Model Spreadsheet
  231. Choosing the right triode as a Phase Inverter
  232. toob noob with GE 5670 and I'd like to do something with it. Help?
  233. my first tube amp, no tubes...
  234. Enough heat to power my CD player...
  235. My first tube amp: 6C33C
  236. S5 16LS kit as a first DIY tube build?
  237. lady day we 91 psu mod help
  238. On days like these ...
  239. The Magnetron - A Low Noise, Long Life Amplifier????
  240. 6M11's
  241. DC coupled 300B idea - request for comments
  242. Fisher bias
  243. How does anode voltage swing to twice HT voltage?
  244. Can a 7625 Ceramic Planar Triode be soldered ?
  245. AMI "DD" Project: 6L6
  246. Plate loading questions
  247. EZ81 rectifier
  248. PY500a
  249. Tube Regulator Thoughts?
  250. Fully balanced from cartridge to loudspeaker - a little help needed!

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