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  1. For what are high mu triodes still useful?
  2. CCa "low noise"?
  3. Upgrading my Audio Research VT 130 SE Tube amp
  4. 100ma FSD voltmeter
  5. Conqueror schematic
  6. Bassman 135 OT
  7. Ground reference
  8. Overdriven Capacitor?
  9. Tone Controls?
  10. My first "from scratch" design, SE KT88..........
  11. OPTs of questionable utility
  12. 6336 as a Rectifier
  13. tube power supply
  14. Anyone read Russian?
  15. PSU - dropping resistors?
  16. pre-amp design, just curious about your thoughts here.
  17. Using isolation transformer as a PSU transformer???
  18. KT66 loosing its getter
  19. Mullard schematic?
  20. Mikale Abdellah SE KT88 B+ voltage?
  21. Layout software
  22. Does anyone have any schematics for a parafeed SET amp?
  23. music angel kt88
  24. CB radio
  25. The end of the 300b Dream?
  26. Voltage divider to reduce 6v dc to 2vdc
  27. oil injected rca cables?
  28. Modification.....
  29. CHOKY'S EC8010 preamp
  30. Using a Grid Choke On the 2A3 when the input/driver is a Pentode?
  31. tube checker
  32. 300B tube going dead after a few months
  33. KT88 se build NO GAIN please help
  34. mengyue mini valve amplifier
  35. Preamp suggest, please.
  36. Problem: Severe power transformer and choke vibration
  37. Amp Hack schematic questions
  38. This circuit ok?
  39. Tube ID anyone?
  40. Posted new books and data
  41. The sound of a failing tube rectifier?
  42. Proyect with PL36 and N2P (Russian ECC83)
  43. 300b LTspice model with grid current?
  44. Tri-amp using 2a3 SETs
  45. TentLabs Directly Heated Tubes Supply
  46. Bevois Valley Design Question
  47. Kofi Annan in: "Oscillation Blues"
  48. Common mode choke model
  49. UTC 20 Watt Amp - Any Experience?
  50. 6cz5s for EL84s
  51. The 120Hz Blues...
  52. Amplitrex AT-1000 Tube Tester
  53. audio amp. versus guitar amp
  54. Grounding points....
  55. Cap values for CLC filter
  56. Tube glows red hot, blows fuse
  57. Independent Bias Adjust for Each Tube?
  58. Mesa Boogie Maverick schematic any1?
  59. KT-88 from a book
  60. Modelling PSU?!
  61. DD amp for ESLs...
  62. Today's tube manufacters, best is?
  63. Advice on hum in phono stage
  64. Cathode follower & SRPP q
  65. FREDs on PSU
  66. Hybrid Shenanigans
  67. How hard is it to rewire my amp from 6av6/6cg7 to just 12ax7 types?
  68. 5AR4 heaters
  69. Bad Grounding,or Cheap Pot??
  70. Tube Construction Handbook
  71. WE 350: dry bass?
  72. What size capacitor I use for a 2A3 or 300B cathode bypass?
  73. Need helps with building poweramp stage
  74. Noah's Ark for electron tubes
  75. Fixed Bias suggestions
  76. OD3/OA3 voltage regulation design
  77. DHT filament heating with SMPS + CCS
  78. Using SE transformers in a PP circuit
  79. EDCOR Releases Line of Guitar OPT's
  80. Schematic: Audio Innovations, The first audio amplifier
  81. Restoring 1948 Gibson GA-30 guitar amp(tube)
  82. Now THIS is tube DIY to the extreme
  83. Dynaco mkIII A431 op's
  84. Alternative to Power Transformer
  85. Help with e180f and ixys current reg
  86. Building a "Hiwatt" tube Bass Amp
  87. help! no power, im lost
  88. Jerrycan amp (RH34SE)
  89. 12B4 Updates
  90. www.diykits.com.hk stepped volume control ... any good?
  91. Hammond L-100 conversion
  92. Anyone have the ASL model MGSI15 schematic ?
  93. Replacement for single-winding OPT?
  94. Buzz in new amp...
  95. 48V B+ linestage
  96. Line-Stage Opinion Question
  97. Audio applications of sweep tubes and ratings
  98. Differences in structure between parafeed ad gapped OPTs
  99. Take a look and let me know what you think
  100. Printed circuit board designing?
  101. SimpleSE - Switches, Wire, IEC, Jacks
  102. KT90 why this ?
  103. Break in
  104. Choke Design - Basic Questions
  105. Is this a good interstage transformer?
  106. Best tubes for bass?
  107. Tube amps & MP3's
  108. TRIO 15Hz Oscilloscope CS-1560A
  109. Newbie Needs Help Choosing A Kit
  110. I need a negative supply rail--but how?
  111. Strange Hum
  112. VR Tubes
  113. Understanding plate loads
  114. How do you know if your preamp has inverted the phase?
  115. Bogen J130 PA to guitar amp?
  116. 6P1 Equivalent
  117. EL34 and KT88??? 6550?
  118. one stage DHT amp
  119. 6V6 Output?
  120. Lineup of four: Help me choose?! OPT for SE
  121. 6DJ8 / 6922 tube?
  122. bias pilot sa 260
  123. Using vintage OPTs as PSU chokes ?
  124. crystal palace driver stage by morgan jones
  125. Why Are 12A*7 Tubes So Bad?
  126. Mikael's KT-88 question
  127. OPT for PSE 6c33c tubes
  128. 24v aikido distortion
  129. ED8000 SE or Parafeed?
  130. GZ33 Rectifier drop?
  131. counterpoint sa11
  132. High voltage problem
  133. Wire gauges
  134. Simple headphones out
  135. Mull(ard)ing over valve choice...
  136. Turning on B+ without heaters with aikido
  137. New Project - Plitron 4006
  138. Where in Brisbane can I get a transformer for my Chinese amp
  139. Etching or silkscreening chassis?
  140. can please someone explain this to me?
  141. A VCCS tube amp, how?
  142. How to add a subwoofer out?
  143. Kind of cool check it out
  144. new opt for s5 k16ls?
  145. Wanted Arkay SP6, Knight 83YX768 schematics
  146. toggle switch for input selector
  147. Tube Rectifier protection
  148. Quick Q on Max G2/Screen Volts..
  149. Cathodyne follower? :)
  150. Real music power
  151. Tube info needed
  152. Petrol Head Amp
  153. Help Needed- Replacement Volume Pot For a Fisher KX100
  154. What are these caps good for?
  155. 300B Set amp some variations
  156. my second design circuit(hifhgain guitar amp)
  157. why p-p amp RL for class B is 1/2 the class A load?
  158. Is this circuit ok?
  159. JTM60 capacitor question
  160. Attenuators ------ Please Help
  161. Transformer Coupled Pentode Question
  162. no response needed 903@klipschorns
  163. KT88: EH vs. Winged C
  164. Voltage swing on a guitar pick-up?
  165. Anyone have experience with the China made tube amps
  166. tubelab SE 300b power transformer
  167. Toroidal transformer potting can
  168. 300B - Push Pull or PSE to drive a commercial speaker
  169. Consonance Ella Diy hifi supply, el34, 6550 or KT88?
  170. Choke Input Filter.
  171. Preamp comparisons
  172. Amperite delay relays
  173. Help with making a tube amp?
  174. Linestage suggestion for Kuei Yang Wang's phonostage
  175. Altec Lansing 440B preamplifier
  176. Modding a Bogen CHB100...
  177. Report: One-Electron PRC as input choke
  178. Phase Splitter Name
  179. 6ck4 sweetspot
  180. Mystery Ebay amp purchase
  181. Triode versus Pentode
  182. Supply, Full wave, choke on center tap?
  183. Ping SY
  184. Interstage Transformer Loading
  185. Tube Amplifier Kit?
  186. Easy inexpensive tube buffer ideas?
  187. Running tubes at their maximum dissipation.
  188. 6BM8/ Heathkkit S.88 Has only 3 and 15 ohm O/P..?
  189. DHT drivers - shootout
  190. Dynaco MK IV
  191. Fender Bassman- AB165 capacitor toss up
  192. KT88 , Genalex or Chinese ? Help !!!
  193. output tubes for stereo 70
  194. 6H6P for Sonic Frontiers Line 2?
  195. Too much distortion
  196. Servo assisted CF LCR-filter
  197. 6v 5AR4?
  198. 845 Grid stopper value
  199. Chokes, sizing and ringing?
  200. Long tail 6sl7 for Dynaco stereo 70?
  201. Triode Fabrication Video
  202. Funny Hi-Fi quote
  203. 300B PP ph.split
  204. extend tube sockets, or tube "plugs"?
  205. Klipsch Promedia GMX A-2.1 + Decware Taboo
  206. So any ideas for a car type amp?
  207. Cathode Biasing a 6L6 quartet power stage
  208. Calling All Mullard 5-20 Aficionados
  209. Modelling a DC filament supply in PSU Designer II
  210. Guitar Preamp Tube combination
  211. 12AX7 Preamp NOOB Question
  212. Adding aux input on a tube console
  213. one safety question
  214. E1148,CV6-How do you distinguish the anode/grid caps?
  215. dual value motor run caps
  216. Strange DC choke behavior
  217. Subwoofer out question.
  218. Tube 6N3 use pre for ChipAmp
  219. Hammond 1650W
  220. separating PSU for preamp
  221. sca-35
  222. A 6.3V regulator delivering 2.8A...?
  223. 6K:8 25W SE OPT, now what tube should I use?
  224. EL84 fixed bias PP Triode
  225. Tube Amp Kit Suggestions
  226. TT21 Vs KT88
  227. One-Electron PRC chokes as PS input choke?
  228. Magnavox 135BB
  229. Is there much point in tube preamps? (This isn't a troll)
  230. How does one determine saturation point of triode or pentode
  231. Help - 807 Technical problem
  232. woooohooo!!! 3 working el84 SEs
  233. westinghouse model 80 radio - eval for parts?
  234. Bogen J130 PA schematic
  235. Marshall JMP-1 high voltage value ??
  236. Better Cap = Better Sound?
  237. Pilot SA 260 bias
  238. 12AX7 gain stage output impedance
  239. Small 1W hifi amp
  240. Tube Radio - What are G & F Terminals?
  241. Has anyone seen this?
  242. how would you Parallel a 12ua7 tube
  243. Tube mod a HT rcvr?
  244. how would i series a 12au7a
  245. does some have distortion schematics for 12au7a
  246. triode strapped tetrode
  247. 6F6G UL Amplifier
  248. Build a VT100?
  249. turrets for tube PC driver board needed
  250. Mikael Abdellah's kt88, (LOADLINES)

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