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  1. Heathkit W 5M output transformers
  2. 6S19 Circlotron (OTL)
  3. Quality of Hammond 1600 series transformers and a question about loading.
  4. Kuei Yang Wang's 6sn7 linestage
  5. Laney TF-200 speaker farts out...
  6. E-mu 0202 + audiotester
  7. Where to buy HT toroids ?
  8. CJ 1.4: Power tubes are working but drivers not ! Help please.
  9. A 6SN7 direct coupled preamp & regulated supply for everyone's perusal.
  10. Slight hum from my new soldering station.
  11. phono stage
  12. 6sn7gtb problem
  13. The old man told me to get it all out of the basement
  14. The Look of Preamp Hum
  15. hookup wire options
  16. Tubelab Simple Se Trannie Shopping List-a Newbie Seeks Info
  17. Testing Amplifiers / Pad
  18. Volume Pot vs Stepped Attenuater
  19. Which tubes should I use?
  20. KT88s and grid current
  21. Gain stage with g2-feedback.
  22. K-502 Left Channel is out
  23. 12B4 help needed
  24. Power Trans question
  25. Noob amp wiring question...
  26. 5842 - russian ripoff
  27. Ruskie tube questions
  28. Opt placement
  29. 807 AB2 oscillation maybe?
  30. Amazon Does DIY Parts
  31. Shielded wire
  32. Guitar amp(s) for nephews
  33. Questions about Tube Amplifiers, Mikael's vs SimpleSE
  34. duncan psu simulation vox ac30cc
  35. Where low noise resistors matter
  36. funky power supply
  37. Choke loaded PSU versus VR tube regulated PSU?
  38. What would most of you do?
  39. IRFBC20 as source follower drivers for EL34s in AB1 PP
  40. first post, PS for 6em7 SET amp
  41. affordable transformers for KT-88's
  42. Need help with schematic
  43. How many people here use simulators, like LTspice, to help design tube stuff?
  44. newbie question regarding gain reduction
  45. Anybody did try this tube preamp ?
  46. Heathkit UA-2 output tx wiring question
  47. Question about the properties of "matched" tubes
  48. Using a passive direct box to kill ground loop noise?
  49. magnetized power transformer!
  50. Utc A-24
  51. lower cost options for spectrum analyser/ function generator?
  52. Need schematics for Val VP-110S Tube Amp
  53. So What now
  54. What other tubes can I use this OPT for?
  55. Super Junkbox 6S19P SET
  56. Grid stopper resistors
  57. 1959 Pilot AA-908 Amp into Guitar Amp
  58. Please evaluate my new EL34 Amp (waveform attached)
  59. Max voltages for EL84?
  60. Tubelab SE finished but need help.
  61. Oscilloscope Probes for Tube Work
  62. ECC88 vs 6SN7
  63. Good (tube) audio shows in the US?
  64. Please help me de-hum my new pre
  65. Help for newbie
  66. Simple ReAmp Mod? Help with Input Impedances, Please!
  67. Which of these two phono stages
  68. Crosley radio
  69. Small tube amp for headphones/computer speakers?(first post)
  70. Peculiar Fisher circuit
  71. Hum in Grounded Grid Pre
  72. Counterpoint SA-1000
  73. K-502 How to select a potentiometer
  74. What are these Christmas light things?
  75. a CHEAP integrated tube amp kit-anybody?
  76. My amp is acting like a transducer!?
  77. Transformer current question
  78. Brimar date codes?
  79. Home made SE 300B amp
  80. Parallel Push Pull 6AS7 or 6080
  81. random crackle ? (McMartin MA-20)
  82. KT88 filament failure - twice on same socket
  83. Solid State Regulator for tube amp
  84. Proposed screen-drive amp design... comments, please?
  85. SimpleSE PCB out of stock
  86. Any good explanation of Passive EQ Filters??
  87. terraplane 300B
  88. Sun Audio transformers
  89. Vacuum State RTP5.
  90. Schematics for Audio Innovations s1000 pre
  91. Tube amp for newbye
  92. 3C24SE amp...
  93. Meixing MingDa MC767-RD
  94. confusing transformer connections
  95. Have to mod K-502 to 4Ohms from 8
  96. SOund of 3B28 vs. 866A
  97. S3E Vacuum Tube
  98. Tube audio & "3 dimensionality"
  99. Darling monoblocks
  100. Testing 350B with B & K 747A
  101. Interstage transformer for balanced amp question
  102. Filament transformer questions
  103. dBm or dBV Audio Voltmeter
  104. VTL MB250 Signature monoblock Manual..
  105. Choke phase spliter
  106. Output transformer DC resistance..
  107. Chassis layout?
  108. Jolida schematic questions
  109. Tube Phono preamp kit?
  110. Does size really matter - SE Output
  111. 437A testing
  112. Tube Amp reverb noise, no vibrato intensity, unknown model. Help please
  113. What to do with a 5k output transfomer?
  114. adapter?
  115. Studer 52
  116. Safety ground question
  117. Old PS questions (EL34 replacement), and any Aus people know BWD?
  118. Darling 1626 amp
  119. Blackheart 5 watt
  120. What is this tube amp
  121. Extry, Extry, Blind Squirrel Finds Nut -sequence
  122. Why is distortion harmonic?
  123. Source for OPT
  124. EL34 to RL12P35 converting
  125. calculating total current draw
  126. Allied Radio (Knight) KA-55 schematic
  127. 6F6G Amplifier
  128. good book/article about using oscilloscopes?
  129. how to attach photos
  130. Is 450V the max of triode strapped 6l6gc
  131. Separate power supply - Umbilical Cord
  132. tube amp being weird -- any ideas
  133. need to discharge psu safely
  134. Jadis DA7/defy power amplifier mods
  135. 5.3v on 6SN7 filament?
  136. The Valve Wizard
  137. Mercury vapor rectifier tube question
  138. An Indiana Yankee in Putin's court.
  139. Switching over to a fixed bias
  140. Dynamic load line analysis using music and speaker load
  141. Capacitance in PSU
  142. preamp line ctt
  143. Genalex KT-88 reissue
  144. Combine EF80 with EL84
  145. 2A3 maximum plate voltage
  146. Amplifier Response Stability & All That.
  147. 100k linear pots, any idea?
  148. 6550, 6L6, or 6V6??
  149. grid-stopper resistor
  150. cathode bypass caps suggestions please for newbie
  151. Need Schematic-H&K B.A.T.T.
  152. 6EJ7 phono preamp?
  153. Impressions of the Ella, a pp EL34
  154. 30L15 / PCC805 - What can I use them for?
  155. Ultra Cheap transformers?
  156. Push-pull output impedance
  157. Tube amp cost
  158. 830b
  159. Leak Tl/12+
  160. Toroid Trafo as choke
  161. in search of a 3c33 dual triode.....
  162. Question about MiniBlok II Schematic
  163. Wavebourn Alligator amplifier
  164. Best Tube Testers?
  165. Rusky version EF86
  166. Melos SHA Gold Issue
  167. Tubelab Simple SE & Edcor
  168. Erratic tube activity
  169. Bogen Front End
  170. Maybe a Ruskie
  171. Another kind of hybrid
  172. Output impedance
  173. GU29 Amp. Schematic - Audioromy or similar
  174. Power On Indicator Light
  175. Newbie Aikido power supply question
  176. Se output transformer question
  177. Aikido hum
  178. Output transformer replacement... Worth it?
  179. Almarro A205A schematic
  180. Valves World question
  181. diodes before plate load
  182. power tubes..newbie question.
  183. Need Help 12BH7 Tube test.
  184. Tube Virgin
  185. Chassis layout help
  186. Maybe this is why 300b's dont last as long
  187. High-voltage bench power supply
  188. Ebay Tube amp buy disaster
  189. HK cheap SE OTPs...hmmm
  190. Modded ST70 Done
  191. bad buzz in an EL34 amp
  192. Another radio->Gtr amp mod question
  193. yaoin
  194. What is the safest method to plot characteristic curves without ruining the tubes
  195. Screen grid zeners; which?
  196. Another one I don't get
  197. 6BG6GA adapter instructions needed
  198. got an EC8020
  199. Identifying these Valvos.
  200. Converting tube guitar amp to Hi-Fi amp
  201. 21kW audio power amp?
  202. Quicksilver conversion
  203. DC PSU for both 6.3vdc and 5vdc from one 6.3vac transformer?
  204. Hammond Transformers in Montreal/Canada
  205. Can't find data for 8624
  206. Any advice on modifying a 2A3 SET amp to parafeed?
  207. Output impedance for non published PP configuration
  208. Grid stopper resistor required (KT66)?
  209. Ask Jan First OPTs
  210. For what are high mu triodes still useful?
  211. CCa "low noise"?
  212. Upgrading my Audio Research VT 130 SE Tube amp
  213. 100ma FSD voltmeter
  214. Conqueror schematic
  215. Bassman 135 OT
  216. Ground reference
  217. Overdriven Capacitor?
  218. Tone Controls?
  219. My first "from scratch" design, SE KT88..........
  220. OPTs of questionable utility
  221. 6336 as a Rectifier
  222. tube power supply
  223. Anyone read Russian?
  224. PSU - dropping resistors?
  225. pre-amp design, just curious about your thoughts here.
  226. Using isolation transformer as a PSU transformer???
  227. KT66 loosing its getter
  228. Mullard schematic?
  229. Mikale Abdellah SE KT88 B+ voltage?
  230. Layout software
  231. Does anyone have any schematics for a parafeed SET amp?
  232. music angel kt88
  233. CB radio
  234. The end of the 300b Dream?
  235. Voltage divider to reduce 6v dc to 2vdc
  236. oil injected rca cables?
  237. Modification.....
  238. CHOKY'S EC8010 preamp
  239. Using a Grid Choke On the 2A3 when the input/driver is a Pentode?
  240. tube checker
  241. 300B tube going dead after a few months
  242. KT88 se build NO GAIN please help
  243. mengyue mini valve amplifier
  244. Preamp suggest, please.
  245. Problem: Severe power transformer and choke vibration
  246. Amp Hack schematic questions
  247. This circuit ok?
  248. Tube ID anyone?
  249. Posted new books and data
  250. The sound of a failing tube rectifier?

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