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

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