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  1. Testing 350B with B & K 747A
  2. Interstage transformer for balanced amp question
  3. Filament transformer questions
  4. dBm or dBV Audio Voltmeter
  5. VTL MB250 Signature monoblock Manual..
  6. Choke phase spliter
  7. Output transformer DC resistance..
  8. Chassis layout?
  9. Jolida schematic questions
  10. Tube Phono preamp kit?
  11. Does size really matter - SE Output
  12. 437A testing
  13. Tube Amp reverb noise, no vibrato intensity, unknown model. Help please
  14. What to do with a 5k output transfomer?
  15. adapter?
  16. Studer 52
  17. Safety ground question
  18. Old PS questions (EL34 replacement), and any Aus people know BWD?
  19. Darling 1626 amp
  20. Blackheart 5 watt
  21. What is this tube amp
  22. Extry, Extry, Blind Squirrel Finds Nut -sequence
  23. Why is distortion harmonic?
  24. Source for OPT
  25. EL34 to RL12P35 converting
  26. calculating total current draw
  27. Allied Radio (Knight) KA-55 schematic
  28. 6F6G Amplifier
  29. good book/article about using oscilloscopes?
  30. how to attach photos
  31. Is 450V the max of triode strapped 6l6gc
  32. Separate power supply - Umbilical Cord
  33. tube amp being weird -- any ideas
  34. need to discharge psu safely
  35. Jadis DA7/defy power amplifier mods
  36. 5.3v on 6SN7 filament?
  37. The Valve Wizard
  38. Mercury vapor rectifier tube question
  39. An Indiana Yankee in Putin's court.
  40. Switching over to a fixed bias
  41. Dynamic load line analysis using music and speaker load
  42. Capacitance in PSU
  43. preamp line ctt
  44. Genalex KT-88 reissue
  45. Combine EF80 with EL84
  46. 2A3 maximum plate voltage
  47. Amplifier Response Stability & All That.
  48. 100k linear pots, any idea?
  49. 6550, 6L6, or 6V6??
  50. grid-stopper resistor
  51. cathode bypass caps suggestions please for newbie
  52. Need Schematic-H&K B.A.T.T.
  53. 6EJ7 phono preamp?
  54. Impressions of the Ella, a pp EL34
  55. 30L15 / PCC805 - What can I use them for?
  56. Ultra Cheap transformers?
  57. Push-pull output impedance
  58. Tube amp cost
  59. 830b
  60. Leak Tl/12+
  61. Toroid Trafo as choke
  62. in search of a 3c33 dual triode.....
  63. Question about MiniBlok II Schematic
  64. Wavebourn Alligator amplifier
  65. Best Tube Testers?
  66. Rusky version EF86
  67. Melos SHA Gold Issue
  68. Tubelab Simple SE & Edcor
  69. Erratic tube activity
  70. Bogen Front End
  71. Maybe a Ruskie
  72. Another kind of hybrid
  73. Output impedance
  74. GU29 Amp. Schematic - Audioromy or similar
  75. Power On Indicator Light
  76. Newbie Aikido power supply question
  77. Se output transformer question
  78. Aikido hum
  79. Output transformer replacement... Worth it?
  80. Almarro A205A schematic
  81. Valves World question
  82. diodes before plate load
  83. power tubes..newbie question.
  84. Need Help 12BH7 Tube test.
  85. Tube Virgin
  86. Chassis layout help
  87. Maybe this is why 300b's dont last as long
  88. High-voltage bench power supply
  89. Ebay Tube amp buy disaster
  90. HK cheap SE OTPs...hmmm
  91. Modded ST70 Done
  92. bad buzz in an EL34 amp
  93. Another radio->Gtr amp mod question
  94. yaoin
  95. What is the safest method to plot characteristic curves without ruining the tubes
  96. Screen grid zeners; which?
  97. Another one I don't get
  98. 6BG6GA adapter instructions needed
  99. got an EC8020
  100. Identifying these Valvos.
  101. Converting tube guitar amp to Hi-Fi amp
  102. 21kW audio power amp?
  103. Quicksilver conversion
  104. DC PSU for both 6.3vdc and 5vdc from one 6.3vac transformer?
  105. Hammond Transformers in Montreal/Canada
  106. Can't find data for 8624
  107. Any advice on modifying a 2A3 SET amp to parafeed?
  108. Output impedance for non published PP configuration
  109. Grid stopper resistor required (KT66)?
  110. Ask Jan First OPTs
  111. For what are high mu triodes still useful?
  112. CCa "low noise"?
  113. Upgrading my Audio Research VT 130 SE Tube amp
  114. 100ma FSD voltmeter
  115. Conqueror schematic
  116. Bassman 135 OT
  117. Ground reference
  118. Overdriven Capacitor?
  119. Tone Controls?
  120. My first "from scratch" design, SE KT88..........
  121. OPTs of questionable utility
  122. 6336 as a Rectifier
  123. tube power supply
  124. Anyone read Russian?
  125. PSU - dropping resistors?
  126. pre-amp design, just curious about your thoughts here.
  127. Using isolation transformer as a PSU transformer???
  128. KT66 loosing its getter
  129. Mullard schematic?
  130. Mikale Abdellah SE KT88 B+ voltage?
  131. Layout software
  132. Does anyone have any schematics for a parafeed SET amp?
  133. music angel kt88
  134. CB radio
  135. The end of the 300b Dream?
  136. Voltage divider to reduce 6v dc to 2vdc
  137. oil injected rca cables?
  138. Modification.....
  139. CHOKY'S EC8010 preamp
  140. Using a Grid Choke On the 2A3 when the input/driver is a Pentode?
  141. tube checker
  142. 300B tube going dead after a few months
  143. KT88 se build NO GAIN please help
  144. mengyue mini valve amplifier
  145. Preamp suggest, please.
  146. Problem: Severe power transformer and choke vibration
  147. Amp Hack schematic questions
  148. This circuit ok?
  149. Tube ID anyone?
  150. Posted new books and data
  151. The sound of a failing tube rectifier?
  152. Proyect with PL36 and N2P (Russian ECC83)
  153. 300b LTspice model with grid current?
  154. Tri-amp using 2a3 SETs
  155. TentLabs Directly Heated Tubes Supply
  156. Bevois Valley Design Question
  157. Kofi Annan in: "Oscillation Blues"
  158. Common mode choke model
  159. UTC 20 Watt Amp - Any Experience?
  160. 6cz5s for EL84s
  161. The 120Hz Blues...
  162. Amplitrex AT-1000 Tube Tester
  163. audio amp. versus guitar amp
  164. Grounding points....
  165. Cap values for CLC filter
  166. Tube glows red hot, blows fuse
  167. Independent Bias Adjust for Each Tube?
  168. Mesa Boogie Maverick schematic any1?
  169. KT-88 from a book
  170. Modelling PSU?!
  171. DD amp for ESLs...
  172. Today's tube manufacters, best is?
  173. Advice on hum in phono stage
  174. Cathode follower & SRPP q
  175. FREDs on PSU
  176. Hybrid Shenanigans
  177. How hard is it to rewire my amp from 6av6/6cg7 to just 12ax7 types?
  178. 5AR4 heaters
  179. Bad Grounding,or Cheap Pot??
  180. Tube Construction Handbook
  181. WE 350: dry bass?
  182. What size capacitor I use for a 2A3 or 300B cathode bypass?
  183. Need helps with building poweramp stage
  184. Noah's Ark for electron tubes
  185. Fixed Bias suggestions
  186. OD3/OA3 voltage regulation design
  187. DHT filament heating with SMPS + CCS
  188. Using SE transformers in a PP circuit
  189. EDCOR Releases Line of Guitar OPT's
  190. Schematic: Audio Innovations, The first audio amplifier
  191. Restoring 1948 Gibson GA-30 guitar amp(tube)
  192. Now THIS is tube DIY to the extreme
  193. Dynaco mkIII A431 op's
  194. Alternative to Power Transformer
  195. Help with e180f and ixys current reg
  196. Building a "Hiwatt" tube Bass Amp
  197. help! no power, im lost
  198. Jerrycan amp (RH34SE)
  199. 12B4 Updates
  200. www.diykits.com.hk stepped volume control ... any good?
  201. Hammond L-100 conversion
  202. Anyone have the ASL model MGSI15 schematic ?
  203. Replacement for single-winding OPT?
  204. Buzz in new amp...
  205. 48V B+ linestage
  206. Line-Stage Opinion Question
  207. Audio applications of sweep tubes and ratings
  208. Differences in structure between parafeed ad gapped OPTs
  209. Take a look and let me know what you think
  210. Printed circuit board designing?
  211. SimpleSE - Switches, Wire, IEC, Jacks
  212. KT90 why this ?
  213. Break in
  214. Choke Design - Basic Questions
  215. Is this a good interstage transformer?
  216. Best tubes for bass?
  217. Tube amps & MP3's
  218. TRIO 15Hz Oscilloscope CS-1560A
  219. Newbie Needs Help Choosing A Kit
  220. I need a negative supply rail--but how?
  221. Strange Hum
  222. VR Tubes
  223. Understanding plate loads
  224. How do you know if your preamp has inverted the phase?
  225. Bogen J130 PA to guitar amp?
  226. 6P1 Equivalent
  227. EL34 and KT88??? 6550?
  228. one stage DHT amp
  229. 6V6 Output?
  230. Lineup of four: Help me choose?! OPT for SE
  231. 6DJ8 / 6922 tube?
  232. bias pilot sa 260
  233. Using vintage OPTs as PSU chokes ?
  234. crystal palace driver stage by morgan jones
  235. Why Are 12A*7 Tubes So Bad?
  236. Mikael's KT-88 question
  237. OPT for PSE 6c33c tubes
  238. 24v aikido distortion
  239. ED8000 SE or Parafeed?
  240. GZ33 Rectifier drop?
  241. counterpoint sa11
  242. High voltage problem
  243. Wire gauges
  244. Simple headphones out
  245. Mull(ard)ing over valve choice...
  246. Turning on B+ without heaters with aikido
  247. New Project - Plitron 4006
  248. Where in Brisbane can I get a transformer for my Chinese amp
  249. Etching or silkscreening chassis?
  250. can please someone explain this to me?

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