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  1. got an EC8020
  2. Identifying these Valvos.
  3. Converting tube guitar amp to Hi-Fi amp
  4. 21kW audio power amp?
  5. Quicksilver conversion
  6. DC PSU for both 6.3vdc and 5vdc from one 6.3vac transformer?
  7. Hammond Transformers in Montreal/Canada
  8. Can't find data for 8624
  9. Any advice on modifying a 2A3 SET amp to parafeed?
  10. Output impedance for non published PP configuration
  11. Grid stopper resistor required (KT66)?
  12. Ask Jan First OPTs
  13. For what are high mu triodes still useful?
  14. CCa "low noise"?
  15. Upgrading my Audio Research VT 130 SE Tube amp
  16. 100ma FSD voltmeter
  17. Conqueror schematic
  18. Bassman 135 OT
  19. Ground reference
  20. Overdriven Capacitor?
  21. Tone Controls?
  22. My first "from scratch" design, SE KT88..........
  23. OPTs of questionable utility
  24. 6336 as a Rectifier
  25. tube power supply
  26. Anyone read Russian?
  27. PSU - dropping resistors?
  28. pre-amp design, just curious about your thoughts here.
  29. Using isolation transformer as a PSU transformer???
  30. KT66 loosing its getter
  31. Mullard schematic?
  32. Mikale Abdellah SE KT88 B+ voltage?
  33. Layout software
  34. Does anyone have any schematics for a parafeed SET amp?
  35. music angel kt88
  36. CB radio
  37. The end of the 300b Dream?
  38. Voltage divider to reduce 6v dc to 2vdc
  39. oil injected rca cables?
  40. Modification.....
  41. CHOKY'S EC8010 preamp
  42. Using a Grid Choke On the 2A3 when the input/driver is a Pentode?
  43. tube checker
  44. 300B tube going dead after a few months
  45. KT88 se build NO GAIN please help
  46. mengyue mini valve amplifier
  47. Preamp suggest, please.
  48. Problem: Severe power transformer and choke vibration
  49. Amp Hack schematic questions
  50. This circuit ok?
  51. Tube ID anyone?
  52. Posted new books and data
  53. The sound of a failing tube rectifier?
  54. Proyect with PL36 and N2P (Russian ECC83)
  55. 300b LTspice model with grid current?
  56. Tri-amp using 2a3 SETs
  57. TentLabs Directly Heated Tubes Supply
  58. Bevois Valley Design Question
  59. Kofi Annan in: "Oscillation Blues"
  60. Common mode choke model
  61. UTC 20 Watt Amp - Any Experience?
  62. 6cz5s for EL84s
  63. The 120Hz Blues...
  64. Amplitrex AT-1000 Tube Tester
  65. audio amp. versus guitar amp
  66. Grounding points....
  67. Cap values for CLC filter
  68. Tube glows red hot, blows fuse
  69. Independent Bias Adjust for Each Tube?
  70. Mesa Boogie Maverick schematic any1?
  71. KT-88 from a book
  72. Modelling PSU?!
  73. DD amp for ESLs...
  74. Today's tube manufacters, best is?
  75. Advice on hum in phono stage
  76. Cathode follower & SRPP q
  77. FREDs on PSU
  78. Hybrid Shenanigans
  79. How hard is it to rewire my amp from 6av6/6cg7 to just 12ax7 types?
  80. 5AR4 heaters
  81. Bad Grounding,or Cheap Pot??
  82. Tube Construction Handbook
  83. WE 350: dry bass?
  84. What size capacitor I use for a 2A3 or 300B cathode bypass?
  85. Need helps with building poweramp stage
  86. Noah's Ark for electron tubes
  87. Fixed Bias suggestions
  88. OD3/OA3 voltage regulation design
  89. DHT filament heating with SMPS + CCS
  90. Using SE transformers in a PP circuit
  91. EDCOR Releases Line of Guitar OPT's
  92. Schematic: Audio Innovations, The first audio amplifier
  93. Restoring 1948 Gibson GA-30 guitar amp(tube)
  94. Now THIS is tube DIY to the extreme
  95. Dynaco mkIII A431 op's
  96. Alternative to Power Transformer
  97. Help with e180f and ixys current reg
  98. Building a "Hiwatt" tube Bass Amp
  99. help! no power, im lost
  100. Jerrycan amp (RH34SE)
  101. 12B4 Updates
  102. www.diykits.com.hk stepped volume control ... any good?
  103. Hammond L-100 conversion
  104. Anyone have the ASL model MGSI15 schematic ?
  105. Replacement for single-winding OPT?
  106. Buzz in new amp...
  107. 48V B+ linestage
  108. Line-Stage Opinion Question
  109. Audio applications of sweep tubes and ratings
  110. Differences in structure between parafeed ad gapped OPTs
  111. Take a look and let me know what you think
  112. Printed circuit board designing?
  113. SimpleSE - Switches, Wire, IEC, Jacks
  114. KT90 why this ?
  115. Break in
  116. Choke Design - Basic Questions
  117. Is this a good interstage transformer?
  118. Best tubes for bass?
  119. Tube amps & MP3's
  120. TRIO 15Hz Oscilloscope CS-1560A
  121. Newbie Needs Help Choosing A Kit
  122. I need a negative supply rail--but how?
  123. Strange Hum
  124. VR Tubes
  125. Understanding plate loads
  126. How do you know if your preamp has inverted the phase?
  127. Bogen J130 PA to guitar amp?
  128. 6P1 Equivalent
  129. EL34 and KT88??? 6550?
  130. one stage DHT amp
  131. 6V6 Output?
  132. Lineup of four: Help me choose?! OPT for SE
  133. 6DJ8 / 6922 tube?
  134. bias pilot sa 260
  135. Using vintage OPTs as PSU chokes ?
  136. crystal palace driver stage by morgan jones
  137. Why Are 12A*7 Tubes So Bad?
  138. Mikael's KT-88 question
  139. OPT for PSE 6c33c tubes
  140. 24v aikido distortion
  141. ED8000 SE or Parafeed?
  142. GZ33 Rectifier drop?
  143. counterpoint sa11
  144. High voltage problem
  145. Wire gauges
  146. Simple headphones out
  147. Mull(ard)ing over valve choice...
  148. Turning on B+ without heaters with aikido
  149. New Project - Plitron 4006
  150. Where in Brisbane can I get a transformer for my Chinese amp
  151. Etching or silkscreening chassis?
  152. can please someone explain this to me?
  153. A VCCS tube amp, how?
  154. How to add a subwoofer out?
  155. Kind of cool check it out
  156. new opt for s5 k16ls?
  157. Wanted Arkay SP6, Knight 83YX768 schematics
  158. toggle switch for input selector
  159. Tube Rectifier protection
  160. Quick Q on Max G2/Screen Volts..
  161. Cathodyne follower? :)
  162. Real music power
  163. Tube info needed
  164. Petrol Head Amp
  165. Help Needed- Replacement Volume Pot For a Fisher KX100
  166. What are these caps good for?
  167. 300B Set amp some variations
  168. my second design circuit(hifhgain guitar amp)
  169. why p-p amp RL for class B is 1/2 the class A load?
  170. Is this circuit ok?
  171. JTM60 capacitor question
  172. Attenuators ------ Please Help
  173. Transformer Coupled Pentode Question
  174. no response needed 903@klipschorns
  175. KT88: EH vs. Winged C
  176. Voltage swing on a guitar pick-up?
  177. Anyone have experience with the China made tube amps
  178. tubelab SE 300b power transformer
  179. Toroidal transformer potting can
  180. 300B - Push Pull or PSE to drive a commercial speaker
  181. Consonance Ella Diy hifi supply, el34, 6550 or KT88?
  182. Choke Input Filter.
  183. Preamp comparisons
  184. Amperite delay relays
  185. Help with making a tube amp?
  186. Linestage suggestion for Kuei Yang Wang's phonostage
  187. Altec Lansing 440B preamplifier
  188. Modding a Bogen CHB100...
  189. Report: One-Electron PRC as input choke
  190. Phase Splitter Name
  191. 6ck4 sweetspot
  192. Mystery Ebay amp purchase
  193. Triode versus Pentode
  194. Supply, Full wave, choke on center tap?
  195. Ping SY
  196. Interstage Transformer Loading
  197. Tube Amplifier Kit?
  198. Easy inexpensive tube buffer ideas?
  199. Running tubes at their maximum dissipation.
  200. 6BM8/ Heathkkit S.88 Has only 3 and 15 ohm O/P..?
  201. DHT drivers - shootout
  202. Dynaco MK IV
  203. Fender Bassman- AB165 capacitor toss up
  204. KT88 , Genalex or Chinese ? Help !!!
  205. output tubes for stereo 70
  206. 6H6P for Sonic Frontiers Line 2?
  207. Too much distortion
  208. Servo assisted CF LCR-filter
  209. 6v 5AR4?
  210. 845 Grid stopper value
  211. Chokes, sizing and ringing?
  212. Long tail 6sl7 for Dynaco stereo 70?
  213. Triode Fabrication Video
  214. Funny Hi-Fi quote
  215. 300B PP ph.split
  216. extend tube sockets, or tube "plugs"?
  217. Klipsch Promedia GMX A-2.1 + Decware Taboo
  218. So any ideas for a car type amp?
  219. Cathode Biasing a 6L6 quartet power stage
  220. Calling All Mullard 5-20 Aficionados
  221. Modelling a DC filament supply in PSU Designer II
  222. Guitar Preamp Tube combination
  223. 12AX7 Preamp NOOB Question
  224. Adding aux input on a tube console
  225. one safety question
  226. E1148,CV6-How do you distinguish the anode/grid caps?
  227. dual value motor run caps
  228. Strange DC choke behavior
  229. Subwoofer out question.
  230. Tube 6N3 use pre for ChipAmp
  231. Hammond 1650W
  232. separating PSU for preamp
  233. sca-35
  234. A 6.3V regulator delivering 2.8A...?
  235. 6K:8 25W SE OPT, now what tube should I use?
  236. EL84 fixed bias PP Triode
  237. Tube Amp Kit Suggestions
  238. TT21 Vs KT88
  239. One-Electron PRC chokes as PS input choke?
  240. Magnavox 135BB
  241. Is there much point in tube preamps? (This isn't a troll)
  242. How does one determine saturation point of triode or pentode
  243. Help - 807 Technical problem
  244. woooohooo!!! 3 working el84 SEs
  245. westinghouse model 80 radio - eval for parts?
  246. Bogen J130 PA schematic
  247. Marshall JMP-1 high voltage value ??
  248. Better Cap = Better Sound?
  249. Pilot SA 260 bias
  250. 12AX7 gain stage output impedance