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

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