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  1. The Valve Wizard
  2. Mercury vapor rectifier tube question
  3. An Indiana Yankee in Putin's court.
  4. Switching over to a fixed bias
  5. Dynamic load line analysis using music and speaker load
  6. Capacitance in PSU
  7. preamp line ctt
  8. Genalex KT-88 reissue
  9. Combine EF80 with EL84
  10. 2A3 maximum plate voltage
  11. Amplifier Response Stability & All That.
  12. 100k linear pots, any idea?
  13. 6550, 6L6, or 6V6??
  14. grid-stopper resistor
  15. cathode bypass caps suggestions please for newbie
  16. Need Schematic-H&K B.A.T.T.
  17. 6EJ7 phono preamp?
  18. Impressions of the Ella, a pp EL34
  19. 30L15 / PCC805 - What can I use them for?
  20. Ultra Cheap transformers?
  21. Push-pull output impedance
  22. Tube amp cost
  23. 830b
  24. Leak Tl/12+
  25. Toroid Trafo as choke
  26. in search of a 3c33 dual triode.....
  27. Question about MiniBlok II Schematic
  28. Wavebourn Alligator amplifier
  29. Best Tube Testers?
  30. Rusky version EF86
  31. Melos SHA Gold Issue
  32. Tubelab Simple SE & Edcor
  33. Erratic tube activity
  34. Bogen Front End
  35. Maybe a Ruskie
  36. Another kind of hybrid
  37. Output impedance
  38. GU29 Amp. Schematic - Audioromy or similar
  39. Power On Indicator Light
  40. Newbie Aikido power supply question
  41. Se output transformer question
  42. Aikido hum
  43. Output transformer replacement... Worth it?
  44. Almarro A205A schematic
  45. Valves World question
  46. diodes before plate load
  47. power tubes..newbie question.
  48. Need Help 12BH7 Tube test.
  49. Tube Virgin
  50. Chassis layout help
  51. Maybe this is why 300b's dont last as long
  52. High-voltage bench power supply
  53. Ebay Tube amp buy disaster
  54. HK cheap SE OTPs...hmmm
  55. Modded ST70 Done
  56. bad buzz in an EL34 amp
  57. Another radio->Gtr amp mod question
  58. yaoin
  59. What is the safest method to plot characteristic curves without ruining the tubes
  60. Screen grid zeners; which?
  61. Another one I don't get
  62. 6BG6GA adapter instructions needed
  63. got an EC8020
  64. Identifying these Valvos.
  65. Converting tube guitar amp to Hi-Fi amp
  66. 21kW audio power amp?
  67. Quicksilver conversion
  68. DC PSU for both 6.3vdc and 5vdc from one 6.3vac transformer?
  69. Hammond Transformers in Montreal/Canada
  70. Can't find data for 8624
  71. Any advice on modifying a 2A3 SET amp to parafeed?
  72. Output impedance for non published PP configuration
  73. Grid stopper resistor required (KT66)?
  74. Ask Jan First OPTs
  75. For what are high mu triodes still useful?
  76. CCa "low noise"?
  77. Upgrading my Audio Research VT 130 SE Tube amp
  78. 100ma FSD voltmeter
  79. Conqueror schematic
  80. Bassman 135 OT
  81. Ground reference
  82. Overdriven Capacitor?
  83. Tone Controls?
  84. My first "from scratch" design, SE KT88..........
  85. OPTs of questionable utility
  86. 6336 as a Rectifier
  87. tube power supply
  88. Anyone read Russian?
  89. PSU - dropping resistors?
  90. pre-amp design, just curious about your thoughts here.
  91. Using isolation transformer as a PSU transformer???
  92. KT66 loosing its getter
  93. Mullard schematic?
  94. Mikale Abdellah SE KT88 B+ voltage?
  95. Layout software
  96. Does anyone have any schematics for a parafeed SET amp?
  97. music angel kt88
  98. CB radio
  99. The end of the 300b Dream?
  100. Voltage divider to reduce 6v dc to 2vdc
  101. oil injected rca cables?
  102. Modification.....
  103. CHOKY'S EC8010 preamp
  104. Using a Grid Choke On the 2A3 when the input/driver is a Pentode?
  105. tube checker
  106. 300B tube going dead after a few months
  107. KT88 se build NO GAIN please help
  108. mengyue mini valve amplifier
  109. Preamp suggest, please.
  110. Problem: Severe power transformer and choke vibration
  111. Amp Hack schematic questions
  112. This circuit ok?
  113. Tube ID anyone?
  114. Posted new books and data
  115. The sound of a failing tube rectifier?
  116. Proyect with PL36 and N2P (Russian ECC83)
  117. 300b LTspice model with grid current?
  118. Tri-amp using 2a3 SETs
  119. TentLabs Directly Heated Tubes Supply
  120. Bevois Valley Design Question
  121. Kofi Annan in: "Oscillation Blues"
  122. Common mode choke model
  123. UTC 20 Watt Amp - Any Experience?
  124. 6cz5s for EL84s
  125. The 120Hz Blues...
  126. Amplitrex AT-1000 Tube Tester
  127. audio amp. versus guitar amp
  128. Grounding points....
  129. Cap values for CLC filter
  130. Tube glows red hot, blows fuse
  131. Independent Bias Adjust for Each Tube?
  132. Mesa Boogie Maverick schematic any1?
  133. KT-88 from a book
  134. Modelling PSU?!
  135. DD amp for ESLs...
  136. Today's tube manufacters, best is?
  137. Advice on hum in phono stage
  138. Cathode follower & SRPP q
  139. FREDs on PSU
  140. Hybrid Shenanigans
  141. How hard is it to rewire my amp from 6av6/6cg7 to just 12ax7 types?
  142. 5AR4 heaters
  143. Bad Grounding,or Cheap Pot??
  144. Tube Construction Handbook
  145. WE 350: dry bass?
  146. What size capacitor I use for a 2A3 or 300B cathode bypass?
  147. Need helps with building poweramp stage
  148. Noah's Ark for electron tubes
  149. Fixed Bias suggestions
  150. OD3/OA3 voltage regulation design
  151. DHT filament heating with SMPS + CCS
  152. Using SE transformers in a PP circuit
  153. EDCOR Releases Line of Guitar OPT's
  154. Schematic: Audio Innovations, The first audio amplifier
  155. Restoring 1948 Gibson GA-30 guitar amp(tube)
  156. Now THIS is tube DIY to the extreme
  157. Dynaco mkIII A431 op's
  158. Alternative to Power Transformer
  159. Help with e180f and ixys current reg
  160. Building a "Hiwatt" tube Bass Amp
  161. help! no power, im lost
  162. Jerrycan amp (RH34SE)
  163. 12B4 Updates
  164. www.diykits.com.hk stepped volume control ... any good?
  165. Hammond L-100 conversion
  166. Anyone have the ASL model MGSI15 schematic ?
  167. Replacement for single-winding OPT?
  168. Buzz in new amp...
  169. 48V B+ linestage
  170. Line-Stage Opinion Question
  171. Audio applications of sweep tubes and ratings
  172. Differences in structure between parafeed ad gapped OPTs
  173. Take a look and let me know what you think
  174. Printed circuit board designing?
  175. SimpleSE - Switches, Wire, IEC, Jacks
  176. KT90 why this ?
  177. Break in
  178. Choke Design - Basic Questions
  179. Is this a good interstage transformer?
  180. Best tubes for bass?
  181. Tube amps & MP3's
  182. TRIO 15Hz Oscilloscope CS-1560A
  183. Newbie Needs Help Choosing A Kit
  184. I need a negative supply rail--but how?
  185. Strange Hum
  186. VR Tubes
  187. Understanding plate loads
  188. How do you know if your preamp has inverted the phase?
  189. Bogen J130 PA to guitar amp?
  190. 6P1 Equivalent
  191. EL34 and KT88??? 6550?
  192. one stage DHT amp
  193. 6V6 Output?
  194. Lineup of four: Help me choose?! OPT for SE
  195. 6DJ8 / 6922 tube?
  196. bias pilot sa 260
  197. Using vintage OPTs as PSU chokes ?
  198. crystal palace driver stage by morgan jones
  199. Why Are 12A*7 Tubes So Bad?
  200. Mikael's KT-88 question
  201. OPT for PSE 6c33c tubes
  202. 24v aikido distortion
  203. ED8000 SE or Parafeed?
  204. GZ33 Rectifier drop?
  205. counterpoint sa11
  206. High voltage problem
  207. Wire gauges
  208. Simple headphones out
  209. Mull(ard)ing over valve choice...
  210. Turning on B+ without heaters with aikido
  211. New Project - Plitron 4006
  212. Where in Brisbane can I get a transformer for my Chinese amp
  213. Etching or silkscreening chassis?
  214. can please someone explain this to me?
  215. A VCCS tube amp, how?
  216. How to add a subwoofer out?
  217. Kind of cool check it out
  218. new opt for s5 k16ls?
  219. Wanted Arkay SP6, Knight 83YX768 schematics
  220. toggle switch for input selector
  221. Tube Rectifier protection
  222. Quick Q on Max G2/Screen Volts..
  223. Cathodyne follower? :)
  224. Real music power
  225. Tube info needed
  226. Petrol Head Amp
  227. Help Needed- Replacement Volume Pot For a Fisher KX100
  228. What are these caps good for?
  229. 300B Set amp some variations
  230. my second design circuit(hifhgain guitar amp)
  231. why p-p amp RL for class B is 1/2 the class A load?
  232. Is this circuit ok?
  233. JTM60 capacitor question
  234. Attenuators ------ Please Help
  235. Transformer Coupled Pentode Question
  236. no response needed 903@klipschorns
  237. KT88: EH vs. Winged C
  238. Voltage swing on a guitar pick-up?
  239. Anyone have experience with the China made tube amps
  240. tubelab SE 300b power transformer
  241. Toroidal transformer potting can
  242. 300B - Push Pull or PSE to drive a commercial speaker
  243. Consonance Ella Diy hifi supply, el34, 6550 or KT88?
  244. Choke Input Filter.
  245. Preamp comparisons
  246. Amperite delay relays
  247. Help with making a tube amp?
  248. Linestage suggestion for Kuei Yang Wang's phonostage
  249. Altec Lansing 440B preamplifier
  250. Modding a Bogen CHB100...

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