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  1. How hard is it to rewire my amp from 6av6/6cg7 to just 12ax7 types?
  2. 5AR4 heaters
  3. Bad Grounding,or Cheap Pot??
  4. Tube Construction Handbook
  5. WE 350: dry bass?
  6. What size capacitor I use for a 2A3 or 300B cathode bypass?
  7. Need helps with building poweramp stage
  8. Noah's Ark for electron tubes
  9. Fixed Bias suggestions
  10. OD3/OA3 voltage regulation design
  11. DHT filament heating with SMPS + CCS
  12. Using SE transformers in a PP circuit
  13. EDCOR Releases Line of Guitar OPT's
  14. Schematic: Audio Innovations, The first audio amplifier
  15. Restoring 1948 Gibson GA-30 guitar amp(tube)
  16. Now THIS is tube DIY to the extreme
  17. Dynaco mkIII A431 op's
  18. Alternative to Power Transformer
  19. Help with e180f and ixys current reg
  20. Building a "Hiwatt" tube Bass Amp
  21. help! no power, im lost
  22. Jerrycan amp (RH34SE)
  23. 12B4 Updates
  24. www.diykits.com.hk stepped volume control ... any good?
  25. Hammond L-100 conversion
  26. Anyone have the ASL model MGSI15 schematic ?
  27. Replacement for single-winding OPT?
  28. Buzz in new amp...
  29. 48V B+ linestage
  30. Line-Stage Opinion Question
  31. Audio applications of sweep tubes and ratings
  32. Differences in structure between parafeed ad gapped OPTs
  33. Take a look and let me know what you think
  34. Printed circuit board designing?
  35. SimpleSE - Switches, Wire, IEC, Jacks
  36. KT90 why this ?
  37. Break in
  38. Choke Design - Basic Questions
  39. Is this a good interstage transformer?
  40. Best tubes for bass?
  41. Tube amps & MP3's
  42. TRIO 15Hz Oscilloscope CS-1560A
  43. Newbie Needs Help Choosing A Kit
  44. I need a negative supply rail--but how?
  45. Strange Hum
  46. VR Tubes
  47. Understanding plate loads
  48. How do you know if your preamp has inverted the phase?
  49. Bogen J130 PA to guitar amp?
  50. 6P1 Equivalent
  51. EL34 and KT88??? 6550?
  52. one stage DHT amp
  53. 6V6 Output?
  54. Lineup of four: Help me choose?! OPT for SE
  55. 6DJ8 / 6922 tube?
  56. bias pilot sa 260
  57. Using vintage OPTs as PSU chokes ?
  58. crystal palace driver stage by morgan jones
  59. Why Are 12A*7 Tubes So Bad?
  60. Mikael's KT-88 question
  61. OPT for PSE 6c33c tubes
  62. 24v aikido distortion
  63. ED8000 SE or Parafeed?
  64. GZ33 Rectifier drop?
  65. counterpoint sa11
  66. High voltage problem
  67. Wire gauges
  68. Simple headphones out
  69. Mull(ard)ing over valve choice...
  70. Turning on B+ without heaters with aikido
  71. New Project - Plitron 4006
  72. Where in Brisbane can I get a transformer for my Chinese amp
  73. Etching or silkscreening chassis?
  74. can please someone explain this to me?
  75. A VCCS tube amp, how?
  76. How to add a subwoofer out?
  77. Kind of cool check it out
  78. new opt for s5 k16ls?
  79. Wanted Arkay SP6, Knight 83YX768 schematics
  80. toggle switch for input selector
  81. Tube Rectifier protection
  82. Quick Q on Max G2/Screen Volts..
  83. Cathodyne follower? :)
  84. Real music power
  85. Tube info needed
  86. Petrol Head Amp
  87. Help Needed- Replacement Volume Pot For a Fisher KX100
  88. What are these caps good for?
  89. 300B Set amp some variations
  90. my second design circuit(hifhgain guitar amp)
  91. why p-p amp RL for class B is 1/2 the class A load?
  92. Is this circuit ok?
  93. JTM60 capacitor question
  94. Attenuators ------ Please Help
  95. Transformer Coupled Pentode Question
  96. no response needed 903@klipschorns
  97. KT88: EH vs. Winged C
  98. Voltage swing on a guitar pick-up?
  99. Anyone have experience with the China made tube amps
  100. tubelab SE 300b power transformer
  101. Toroidal transformer potting can
  102. 300B - Push Pull or PSE to drive a commercial speaker
  103. Consonance Ella Diy hifi supply, el34, 6550 or KT88?
  104. Choke Input Filter.
  105. Preamp comparisons
  106. Amperite delay relays
  107. Help with making a tube amp?
  108. Linestage suggestion for Kuei Yang Wang's phonostage
  109. Altec Lansing 440B preamplifier
  110. Modding a Bogen CHB100...
  111. Report: One-Electron PRC as input choke
  112. Phase Splitter Name
  113. 6ck4 sweetspot
  114. Mystery Ebay amp purchase
  115. Triode versus Pentode
  116. Supply, Full wave, choke on center tap?
  117. Ping SY
  118. Interstage Transformer Loading
  119. Tube Amplifier Kit?
  120. Easy inexpensive tube buffer ideas?
  121. Running tubes at their maximum dissipation.
  122. 6BM8/ Heathkkit S.88 Has only 3 and 15 ohm O/P..?
  123. DHT drivers - shootout
  124. Dynaco MK IV
  125. Fender Bassman- AB165 capacitor toss up
  126. KT88 , Genalex or Chinese ? Help !!!
  127. output tubes for stereo 70
  128. 6H6P for Sonic Frontiers Line 2?
  129. Too much distortion
  130. Servo assisted CF LCR-filter
  131. 6v 5AR4?
  132. 845 Grid stopper value
  133. Chokes, sizing and ringing?
  134. Long tail 6sl7 for Dynaco stereo 70?
  135. Triode Fabrication Video
  136. Funny Hi-Fi quote
  137. 300B PP ph.split
  138. extend tube sockets, or tube "plugs"?
  139. Klipsch Promedia GMX A-2.1 + Decware Taboo
  140. So any ideas for a car type amp?
  141. Cathode Biasing a 6L6 quartet power stage
  142. Calling All Mullard 5-20 Aficionados
  143. Modelling a DC filament supply in PSU Designer II
  144. Guitar Preamp Tube combination
  145. 12AX7 Preamp NOOB Question
  146. Adding aux input on a tube console
  147. one safety question
  148. E1148,CV6-How do you distinguish the anode/grid caps?
  149. dual value motor run caps
  150. Strange DC choke behavior
  151. Subwoofer out question.
  152. Tube 6N3 use pre for ChipAmp
  153. Hammond 1650W
  154. separating PSU for preamp
  155. sca-35
  156. A 6.3V regulator delivering 2.8A...?
  157. 6K:8 25W SE OPT, now what tube should I use?
  158. EL84 fixed bias PP Triode
  159. Tube Amp Kit Suggestions
  160. TT21 Vs KT88
  161. One-Electron PRC chokes as PS input choke?
  162. Magnavox 135BB
  163. Is there much point in tube preamps? (This isn't a troll)
  164. How does one determine saturation point of triode or pentode
  165. Help - 807 Technical problem
  166. woooohooo!!! 3 working el84 SEs
  167. westinghouse model 80 radio - eval for parts?
  168. Bogen J130 PA schematic
  169. Marshall JMP-1 high voltage value ??
  170. Better Cap = Better Sound?
  171. Pilot SA 260 bias
  172. 12AX7 gain stage output impedance
  173. Small 1W hifi amp
  174. Tube Radio - What are G & F Terminals?
  175. Has anyone seen this?
  176. how would you Parallel a 12ua7 tube
  177. Tube mod a HT rcvr?
  178. how would i series a 12au7a
  179. does some have distortion schematics for 12au7a
  180. triode strapped tetrode
  181. 6F6G UL Amplifier
  182. Build a VT100?
  183. turrets for tube PC driver board needed
  184. Mikael Abdellah's kt88, (LOADLINES)
  185. piezo amp discussion on loudspeaker forum
  186. Balanced interconnect to differential amp - how would you do it?
  187. Ebay Tube Preamp Kit
  188. Kiwame resistors
  189. Mains isolation - would this work?
  190. 6CA7 Mikael Abdellah's KT88 SE amp?
  191. Tube heaters AC or DC?
  192. Question about system design with the K-12
  193. CCS on SE 2A3 cathode
  194. Saucepan Amplifier
  195. Rectifier query
  196. Fisher 400c
  197. Hum Problem
  198. Shanghai: please recommend some audio shops
  199. Calculating max Anode Voltage
  200. One thought about improved Single Ended amplifier
  201. low distortion sweep generator - not a PC
  202. Any articles on how to bias correctly
  203. Max dissp of EH 6sn7
  204. Switched Capacitor Impedance Converter
  205. Chinese Output transformer for 300B SET
  206. Is a VTVM useful?
  207. Permanent thread name proposal
  208. Loctal Rectifiers
  209. Silk Transformers
  210. Noob Power transformer for Tubelab SimpleSE
  211. Gain Q
  212. What cable between PSU and Amp?
  213. luxman mq 36 schematics
  214. Nonstandard tubes for audio? Quadrature grid chorus effect?
  215. Parts assortments sold with organizer
  216. Re-Gapping OPT
  217. I want to begin but I don't know how!!!
  218. Ultralinear with zener on the screen
  219. ReSEPP Design: 5 Tubes 4 Natural Sound
  220. Chinese Tube Amp?
  221. Ampex 351 - Mic pre
  222. Another ground question
  223. for the life of me
  224. Front Panel Express finishes
  225. transformer spec
  226. diode bridge - 10000uF cap - diode tube - small cap - HV+
  227. passive components affected by magnetic fields?
  228. Help on Pentode Octal Phono Stage (POPS)
  229. Cascode gain. Did I do something wrong?
  230. Bad Tube in my "new" Hammond C2 Organ preamp? HELP w/ diagnosis!!
  231. Need tube data for 10Y
  232. Bending aluminum?
  233. Does anyone recognise this 12AU7?
  234. Phase splitting--how does it work?
  235. Construction technique?
  236. function generator
  237. Ceramic or Magnetic with new preamp?
  238. Melos Triode 200 fuses
  239. Fantasia Disney amp
  240. Ella amplifier problems
  241. SE design questions before I start my project
  242. Single stage preamp
  243. Help me to identify unknown tube
  244. PSU Question...Full Wave Bridge
  245. 6as7g Se
  246. Music Angel Modification
  247. 6SL7 Phono Preamp
  248. Grounded Grid Preamp
  249. Formula question
  250. 6N9S different versions

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