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

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