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  1. Choke loaded PSU versus VR tube regulated PSU?
  2. What would most of you do?
  3. IRFBC20 as source follower drivers for EL34s in AB1 PP
  4. first post, PS for 6em7 SET amp
  5. affordable transformers for KT-88's
  6. Need help with schematic
  7. How many people here use simulators, like LTspice, to help design tube stuff?
  8. newbie question regarding gain reduction
  9. Anybody did try this tube preamp ?
  10. Heathkit UA-2 output tx wiring question
  11. Question about the properties of "matched" tubes
  12. Using a passive direct box to kill ground loop noise?
  13. magnetized power transformer!
  14. Utc A-24
  15. lower cost options for spectrum analyser/ function generator?
  16. Need schematics for Val VP-110S Tube Amp
  17. So What now
  18. What other tubes can I use this OPT for?
  19. Super Junkbox 6S19P SET
  20. Grid stopper resistors
  21. 1959 Pilot AA-908 Amp into Guitar Amp
  22. Please evaluate my new EL34 Amp (waveform attached)
  23. Max voltages for EL84?
  24. Tubelab SE finished but need help.
  25. Oscilloscope Probes for Tube Work
  26. ECC88 vs 6SN7
  27. Good (tube) audio shows in the US?
  28. Please help me de-hum my new pre
  29. Help for newbie
  30. Simple ReAmp Mod? Help with Input Impedances, Please!
  31. Which of these two phono stages
  32. Crosley radio
  33. Small tube amp for headphones/computer speakers?(first post)
  34. Peculiar Fisher circuit
  35. Hum in Grounded Grid Pre
  36. Counterpoint SA-1000
  37. K-502 How to select a potentiometer
  38. What are these Christmas light things?
  39. a CHEAP integrated tube amp kit-anybody?
  40. My amp is acting like a transducer!?
  41. Transformer current question
  42. Brimar date codes?
  43. Home made SE 300B amp
  44. Parallel Push Pull 6AS7 or 6080
  45. random crackle ? (McMartin MA-20)
  46. KT88 filament failure - twice on same socket
  47. Solid State Regulator for tube amp
  48. Proposed screen-drive amp design... comments, please?
  49. SimpleSE PCB out of stock
  50. Any good explanation of Passive EQ Filters??
  51. terraplane 300B
  52. Sun Audio transformers
  53. Vacuum State RTP5.
  54. Schematics for Audio Innovations s1000 pre
  55. Tube amp for newbye
  56. 3C24SE amp...
  57. Meixing MingDa MC767-RD
  58. confusing transformer connections
  59. Have to mod K-502 to 4Ohms from 8
  60. SOund of 3B28 vs. 866A
  61. S3E Vacuum Tube
  62. Tube audio & "3 dimensionality"
  63. Darling monoblocks
  64. Testing 350B with B & K 747A
  65. Interstage transformer for balanced amp question
  66. Filament transformer questions
  67. dBm or dBV Audio Voltmeter
  68. VTL MB250 Signature monoblock Manual..
  69. Choke phase spliter
  70. Output transformer DC resistance..
  71. Chassis layout?
  72. Jolida schematic questions
  73. Tube Phono preamp kit?
  74. Does size really matter - SE Output
  75. 437A testing
  76. Tube Amp reverb noise, no vibrato intensity, unknown model. Help please
  77. What to do with a 5k output transfomer?
  78. adapter?
  79. Studer 52
  80. Safety ground question
  81. Old PS questions (EL34 replacement), and any Aus people know BWD?
  82. Darling 1626 amp
  83. Blackheart 5 watt
  84. What is this tube amp
  85. Extry, Extry, Blind Squirrel Finds Nut -sequence
  86. Why is distortion harmonic?
  87. Source for OPT
  88. EL34 to RL12P35 converting
  89. calculating total current draw
  90. Allied Radio (Knight) KA-55 schematic
  91. 6F6G Amplifier
  92. good book/article about using oscilloscopes?
  93. how to attach photos
  94. Is 450V the max of triode strapped 6l6gc
  95. Separate power supply - Umbilical Cord
  96. tube amp being weird -- any ideas
  97. need to discharge psu safely
  98. Jadis DA7/defy power amplifier mods
  99. 5.3v on 6SN7 filament?
  100. The Valve Wizard
  101. Mercury vapor rectifier tube question
  102. An Indiana Yankee in Putin's court.
  103. Switching over to a fixed bias
  104. Dynamic load line analysis using music and speaker load
  105. Capacitance in PSU
  106. preamp line ctt
  107. Genalex KT-88 reissue
  108. Combine EF80 with EL84
  109. 2A3 maximum plate voltage
  110. Amplifier Response Stability & All That.
  111. 100k linear pots, any idea?
  112. 6550, 6L6, or 6V6??
  113. grid-stopper resistor
  114. cathode bypass caps suggestions please for newbie
  115. Need Schematic-H&K B.A.T.T.
  116. 6EJ7 phono preamp?
  117. Impressions of the Ella, a pp EL34
  118. 30L15 / PCC805 - What can I use them for?
  119. Ultra Cheap transformers?
  120. Push-pull output impedance
  121. Tube amp cost
  122. 830b
  123. Leak Tl/12+
  124. Toroid Trafo as choke
  125. in search of a 3c33 dual triode.....
  126. Question about MiniBlok II Schematic
  127. Wavebourn Alligator amplifier
  128. Best Tube Testers?
  129. Rusky version EF86
  130. Melos SHA Gold Issue
  131. Tubelab Simple SE & Edcor
  132. Erratic tube activity
  133. Bogen Front End
  134. Maybe a Ruskie
  135. Another kind of hybrid
  136. Output impedance
  137. GU29 Amp. Schematic - Audioromy or similar
  138. Power On Indicator Light
  139. Newbie Aikido power supply question
  140. Se output transformer question
  141. Aikido hum
  142. Output transformer replacement... Worth it?
  143. Almarro A205A schematic
  144. Valves World question
  145. diodes before plate load
  146. power tubes..newbie question.
  147. Need Help 12BH7 Tube test.
  148. Tube Virgin
  149. Chassis layout help
  150. Maybe this is why 300b's dont last as long
  151. High-voltage bench power supply
  152. Ebay Tube amp buy disaster
  153. HK cheap SE OTPs...hmmm
  154. Modded ST70 Done
  155. bad buzz in an EL34 amp
  156. Another radio->Gtr amp mod question
  157. yaoin
  158. What is the safest method to plot characteristic curves without ruining the tubes
  159. Screen grid zeners; which?
  160. Another one I don't get
  161. 6BG6GA adapter instructions needed
  162. got an EC8020
  163. Identifying these Valvos.
  164. Converting tube guitar amp to Hi-Fi amp
  165. 21kW audio power amp?
  166. Quicksilver conversion
  167. DC PSU for both 6.3vdc and 5vdc from one 6.3vac transformer?
  168. Hammond Transformers in Montreal/Canada
  169. Can't find data for 8624
  170. Any advice on modifying a 2A3 SET amp to parafeed?
  171. Output impedance for non published PP configuration
  172. Grid stopper resistor required (KT66)?
  173. Ask Jan First OPTs
  174. For what are high mu triodes still useful?
  175. CCa "low noise"?
  176. Upgrading my Audio Research VT 130 SE Tube amp
  177. 100ma FSD voltmeter
  178. Conqueror schematic
  179. Bassman 135 OT
  180. Ground reference
  181. Overdriven Capacitor?
  182. Tone Controls?
  183. My first "from scratch" design, SE KT88..........
  184. OPTs of questionable utility
  185. 6336 as a Rectifier
  186. tube power supply
  187. Anyone read Russian?
  188. PSU - dropping resistors?
  189. pre-amp design, just curious about your thoughts here.
  190. Using isolation transformer as a PSU transformer???
  191. KT66 loosing its getter
  192. Mullard schematic?
  193. Mikale Abdellah SE KT88 B+ voltage?
  194. Layout software
  195. Does anyone have any schematics for a parafeed SET amp?
  196. music angel kt88
  197. CB radio
  198. The end of the 300b Dream?
  199. Voltage divider to reduce 6v dc to 2vdc
  200. oil injected rca cables?
  201. Modification.....
  202. CHOKY'S EC8010 preamp
  203. Using a Grid Choke On the 2A3 when the input/driver is a Pentode?
  204. tube checker
  205. 300B tube going dead after a few months
  206. KT88 se build NO GAIN please help
  207. mengyue mini valve amplifier
  208. Preamp suggest, please.
  209. Problem: Severe power transformer and choke vibration
  210. Amp Hack schematic questions
  211. This circuit ok?
  212. Tube ID anyone?
  213. Posted new books and data
  214. The sound of a failing tube rectifier?
  215. Proyect with PL36 and N2P (Russian ECC83)
  216. 300b LTspice model with grid current?
  217. Tri-amp using 2a3 SETs
  218. TentLabs Directly Heated Tubes Supply
  219. Bevois Valley Design Question
  220. Kofi Annan in: "Oscillation Blues"
  221. Common mode choke model
  222. UTC 20 Watt Amp - Any Experience?
  223. 6cz5s for EL84s
  224. The 120Hz Blues...
  225. Amplitrex AT-1000 Tube Tester
  226. audio amp. versus guitar amp
  227. Grounding points....
  228. Cap values for CLC filter
  229. Tube glows red hot, blows fuse
  230. Independent Bias Adjust for Each Tube?
  231. Mesa Boogie Maverick schematic any1?
  232. KT-88 from a book
  233. Modelling PSU?!
  234. DD amp for ESLs...
  235. Today's tube manufacters, best is?
  236. Advice on hum in phono stage
  237. Cathode follower & SRPP q
  238. FREDs on PSU
  239. Hybrid Shenanigans
  240. How hard is it to rewire my amp from 6av6/6cg7 to just 12ax7 types?
  241. 5AR4 heaters
  242. Bad Grounding,or Cheap Pot??
  243. Tube Construction Handbook
  244. WE 350: dry bass?
  245. What size capacitor I use for a 2A3 or 300B cathode bypass?
  246. Need helps with building poweramp stage
  247. Noah's Ark for electron tubes
  248. Fixed Bias suggestions
  249. OD3/OA3 voltage regulation design
  250. DHT filament heating with SMPS + CCS

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