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

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