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  1. Toroid Trafo as choke
  2. in search of a 3c33 dual triode.....
  3. Question about MiniBlok II Schematic
  4. Wavebourn Alligator amplifier
  5. Best Tube Testers?
  6. Rusky version EF86
  7. Melos SHA Gold Issue
  8. Tubelab Simple SE & Edcor
  9. Erratic tube activity
  10. Bogen Front End
  11. Maybe a Ruskie
  12. Another kind of hybrid
  13. Output impedance
  14. GU29 Amp. Schematic - Audioromy or similar
  15. Power On Indicator Light
  16. Newbie Aikido power supply question
  17. Se output transformer question
  18. Aikido hum
  19. Output transformer replacement... Worth it?
  20. Almarro A205A schematic
  21. Valves World question
  22. diodes before plate load
  23. power tubes..newbie question.
  24. Need Help 12BH7 Tube test.
  25. Tube Virgin
  26. Chassis layout help
  27. Maybe this is why 300b's dont last as long
  28. High-voltage bench power supply
  29. Ebay Tube amp buy disaster
  30. HK cheap SE OTPs...hmmm
  31. Modded ST70 Done
  32. bad buzz in an EL34 amp
  33. Another radio->Gtr amp mod question
  34. yaoin
  35. What is the safest method to plot characteristic curves without ruining the tubes
  36. Screen grid zeners; which?
  37. Another one I don't get
  38. 6BG6GA adapter instructions needed
  39. got an EC8020
  40. Identifying these Valvos.
  41. Converting tube guitar amp to Hi-Fi amp
  42. 21kW audio power amp?
  43. Quicksilver conversion
  44. DC PSU for both 6.3vdc and 5vdc from one 6.3vac transformer?
  45. Hammond Transformers in Montreal/Canada
  46. Can't find data for 8624
  47. Any advice on modifying a 2A3 SET amp to parafeed?
  48. Output impedance for non published PP configuration
  49. Grid stopper resistor required (KT66)?
  50. Ask Jan First OPTs
  51. For what are high mu triodes still useful?
  52. CCa "low noise"?
  53. Upgrading my Audio Research VT 130 SE Tube amp
  54. 100ma FSD voltmeter
  55. Conqueror schematic
  56. Bassman 135 OT
  57. Ground reference
  58. Overdriven Capacitor?
  59. Tone Controls?
  60. My first "from scratch" design, SE KT88..........
  61. OPTs of questionable utility
  62. 6336 as a Rectifier
  63. tube power supply
  64. Anyone read Russian?
  65. PSU - dropping resistors?
  66. pre-amp design, just curious about your thoughts here.
  67. Using isolation transformer as a PSU transformer???
  68. KT66 loosing its getter
  69. Mullard schematic?
  70. Mikale Abdellah SE KT88 B+ voltage?
  71. Layout software
  72. Does anyone have any schematics for a parafeed SET amp?
  73. music angel kt88
  74. CB radio
  75. The end of the 300b Dream?
  76. Voltage divider to reduce 6v dc to 2vdc
  77. oil injected rca cables?
  78. Modification.....
  79. CHOKY'S EC8010 preamp
  80. Using a Grid Choke On the 2A3 when the input/driver is a Pentode?
  81. tube checker
  82. 300B tube going dead after a few months
  83. KT88 se build NO GAIN please help
  84. mengyue mini valve amplifier
  85. Preamp suggest, please.
  86. Problem: Severe power transformer and choke vibration
  87. Amp Hack schematic questions
  88. This circuit ok?
  89. Tube ID anyone?
  90. Posted new books and data
  91. The sound of a failing tube rectifier?
  92. Proyect with PL36 and N2P (Russian ECC83)
  93. 300b LTspice model with grid current?
  94. Tri-amp using 2a3 SETs
  95. TentLabs Directly Heated Tubes Supply
  96. Bevois Valley Design Question
  97. Kofi Annan in: "Oscillation Blues"
  98. Common mode choke model
  99. UTC 20 Watt Amp - Any Experience?
  100. 6cz5s for EL84s
  101. The 120Hz Blues...
  102. Amplitrex AT-1000 Tube Tester
  103. audio amp. versus guitar amp
  104. Grounding points....
  105. Cap values for CLC filter
  106. Tube glows red hot, blows fuse
  107. Independent Bias Adjust for Each Tube?
  108. Mesa Boogie Maverick schematic any1?
  109. KT-88 from a book
  110. Modelling PSU?!
  111. DD amp for ESLs...
  112. Today's tube manufacters, best is?
  113. Advice on hum in phono stage
  114. Cathode follower & SRPP q
  115. FREDs on PSU
  116. Hybrid Shenanigans
  117. How hard is it to rewire my amp from 6av6/6cg7 to just 12ax7 types?
  118. 5AR4 heaters
  119. Bad Grounding,or Cheap Pot??
  120. Tube Construction Handbook
  121. WE 350: dry bass?
  122. What size capacitor I use for a 2A3 or 300B cathode bypass?
  123. Need helps with building poweramp stage
  124. Noah's Ark for electron tubes
  125. Fixed Bias suggestions
  126. OD3/OA3 voltage regulation design
  127. DHT filament heating with SMPS + CCS
  128. Using SE transformers in a PP circuit
  129. EDCOR Releases Line of Guitar OPT's
  130. Schematic: Audio Innovations, The first audio amplifier
  131. Restoring 1948 Gibson GA-30 guitar amp(tube)
  132. Now THIS is tube DIY to the extreme
  133. Dynaco mkIII A431 op's
  134. Alternative to Power Transformer
  135. Help with e180f and ixys current reg
  136. Building a "Hiwatt" tube Bass Amp
  137. help! no power, im lost
  138. Jerrycan amp (RH34SE)
  139. 12B4 Updates
  140. www.diykits.com.hk stepped volume control ... any good?
  141. Hammond L-100 conversion
  142. Anyone have the ASL model MGSI15 schematic ?
  143. Replacement for single-winding OPT?
  144. Buzz in new amp...
  145. 48V B+ linestage
  146. Line-Stage Opinion Question
  147. Audio applications of sweep tubes and ratings
  148. Differences in structure between parafeed ad gapped OPTs
  149. Take a look and let me know what you think
  150. Printed circuit board designing?
  151. SimpleSE - Switches, Wire, IEC, Jacks
  152. KT90 why this ?
  153. Break in
  154. Choke Design - Basic Questions
  155. Is this a good interstage transformer?
  156. Best tubes for bass?
  157. Tube amps & MP3's
  158. TRIO 15Hz Oscilloscope CS-1560A
  159. Newbie Needs Help Choosing A Kit
  160. I need a negative supply rail--but how?
  161. Strange Hum
  162. VR Tubes
  163. Understanding plate loads
  164. How do you know if your preamp has inverted the phase?
  165. Bogen J130 PA to guitar amp?
  166. 6P1 Equivalent
  167. EL34 and KT88??? 6550?
  168. one stage DHT amp
  169. 6V6 Output?
  170. Lineup of four: Help me choose?! OPT for SE
  171. 6DJ8 / 6922 tube?
  172. bias pilot sa 260
  173. Using vintage OPTs as PSU chokes ?
  174. crystal palace driver stage by morgan jones
  175. Why Are 12A*7 Tubes So Bad?
  176. Mikael's KT-88 question
  177. OPT for PSE 6c33c tubes
  178. 24v aikido distortion
  179. ED8000 SE or Parafeed?
  180. GZ33 Rectifier drop?
  181. counterpoint sa11
  182. High voltage problem
  183. Wire gauges
  184. Simple headphones out
  185. Mull(ard)ing over valve choice...
  186. Turning on B+ without heaters with aikido
  187. New Project - Plitron 4006
  188. Where in Brisbane can I get a transformer for my Chinese amp
  189. Etching or silkscreening chassis?
  190. can please someone explain this to me?
  191. A VCCS tube amp, how?
  192. How to add a subwoofer out?
  193. Kind of cool check it out
  194. new opt for s5 k16ls?
  195. Wanted Arkay SP6, Knight 83YX768 schematics
  196. toggle switch for input selector
  197. Tube Rectifier protection
  198. Quick Q on Max G2/Screen Volts..
  199. Cathodyne follower? :)
  200. Real music power
  201. Tube info needed
  202. Petrol Head Amp
  203. Help Needed- Replacement Volume Pot For a Fisher KX100
  204. What are these caps good for?
  205. 300B Set amp some variations
  206. my second design circuit(hifhgain guitar amp)
  207. why p-p amp RL for class B is 1/2 the class A load?
  208. Is this circuit ok?
  209. JTM60 capacitor question
  210. Attenuators ------ Please Help
  211. Transformer Coupled Pentode Question
  212. no response needed 903@klipschorns
  213. KT88: EH vs. Winged C
  214. Voltage swing on a guitar pick-up?
  215. Anyone have experience with the China made tube amps
  216. tubelab SE 300b power transformer
  217. Toroidal transformer potting can
  218. 300B - Push Pull or PSE to drive a commercial speaker
  219. Consonance Ella Diy hifi supply, el34, 6550 or KT88?
  220. Choke Input Filter.
  221. Preamp comparisons
  222. Amperite delay relays
  223. Help with making a tube amp?
  224. Linestage suggestion for Kuei Yang Wang's phonostage
  225. Altec Lansing 440B preamplifier
  226. Modding a Bogen CHB100...
  227. Report: One-Electron PRC as input choke
  228. Phase Splitter Name
  229. 6ck4 sweetspot
  230. Mystery Ebay amp purchase
  231. Triode versus Pentode
  232. Supply, Full wave, choke on center tap?
  233. Ping SY
  234. Interstage Transformer Loading
  235. Tube Amplifier Kit?
  236. Easy inexpensive tube buffer ideas?
  237. Running tubes at their maximum dissipation.
  238. 6BM8/ Heathkkit S.88 Has only 3 and 15 ohm O/P..?
  239. DHT drivers - shootout
  240. Dynaco MK IV
  241. Fender Bassman- AB165 capacitor toss up
  242. KT88 , Genalex or Chinese ? Help !!!
  243. output tubes for stereo 70
  244. 6H6P for Sonic Frontiers Line 2?
  245. Too much distortion
  246. Servo assisted CF LCR-filter
  247. 6v 5AR4?
  248. 845 Grid stopper value
  249. Chokes, sizing and ringing?
  250. Long tail 6sl7 for Dynaco stereo 70?

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