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  1. ECC81 double triode tubes flashed brightly when switched on.
  2. pre amp with tone controll
  3. Making own hifi tube amp from scratch!!
  4. Pentode CCS as a load for long tailed pair?
  5. E88CC & 6N23P plate voltage range?
  6. First pre phono design [newbie]
  7. Struggling with LTspice - How to use .inc to get a tube to appear
  8. Eico St 40
  9. ECC88 Input/driverstage for F4 amp
  10. Tube headphone amp
  11. Rike Audio S-cap
  12. Acquired free brand new Jolida 302a
  13. Triode vs Transistor
  14. Help with restoration of Audio Research equipment
  15. Grommes 103gt tuner
  16. Frank’s 6SN7 pre & regulated supply
  17. Sleeping giant
  18. hum by mounting powertransformer and tubes on same chassis
  19. Rectifier tube overheating
  20. "World's Best Technical Master Craftsmen"
  21. OPT for 2A3
  22. getting rid of pre amp in a tube amp
  23. A question on OPT and no loads.
  24. Auto-Bias vs Manual bias vs EFB
  25. Russian receiving tubes and foreign equivalents
  26. B+ delay timer module
  27. Testing DIY triodes
  28. Adding a dummy load to prevent amp from being damaged by having no load?
  29. 30 watt class A chopper controlled bias with 6 EL84
  30. THD
  31. Input resistor (What are purposes?)
  32. Posted new 300B push-pull amp design
  33. Help me source a pair of OPT for Knight KG-240 tube amp
  34. Help Pick Transformers for EICO HF-87
  35. PreAmp
  36. Original price of the Conrad Johnson PV-5
  37. balance pots in Williamson driver stage
  38. Another Question on Tektronix Transformers
  39. Philco K1629 Upgrade Options
  40. My return to tubes, via headphones - what circuit would you recommend?
  41. High Quality EL84 UL SE Amplifier
  42. regulated supply to CCS plate load
  43. Twin Audio Sinfonia Preamp
  44. ecll800 schematic confusion
  45. 6L6 recommendations
  46. tube 100th
  47. Luxman OY15-5k OPT?
  48. Has anyone had experience with Russian 5C8S and 5C9S?
  49. New Here looking for info on rare SVIKO russian made 6KG6 monoblocks
  50. DC-DC converters
  51. EL 84 pp amp - simple regulated circuit sought
  52. Any tube amp to drive B&W 802D?
  53. New to valve amplifiers
  54. SE 6GW8 output transformer with 5 wires.
  55. Mr.Curwen's single ended adventures
  56. Tube magic eye with em84-sensitivity?!
  57. Tube test
  58. Brimar 6V6 USSR
  59. Construction Guides
  60. World Design KT88 Kit
  61. Opinions appreciated: Lafayette LA 224b vs. McIntosh 225
  62. Clone X10D problems distortion / saturation ... help!
  63. 12DW7 or 12AU7+12AX7 if stereo?
  64. First preamp and gain control
  65. Tube life..
  66. Berman 76 preamplifier, I need some advice please
  67. How to light GM70 tube as decorative?
  68. Old Tube amp missing tubes. HELP
  69. Going to Berlin, looking for electronics diy shops
  70. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  71. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  72. Help with Eico ST70
  73. Class-D and Tube buffer/preamp off same 12V SLA?
  74. Hard time to find High Voltage medium power linear BJT
  75. Gu50 or 1624 PP amp first trials
  76. cathode follower driver A2
  77. High Pass Filter for OTL headphone Amp
  78. Bewitch 6550 Balance Issue
  79. ground hum issues in an old peak st-100
  80. Need an APPJ PA0901A Mini Amp Output Transformer.
  81. VTL Tiny Triode Schematics?
  82. A question of dynamics: Amplifier design?
  83. Rechargeable battery for cathode bias: open discussion
  84. High quality tube socket for 4P1L tube ?
  85. VTL Schematic needed
  86. Diode rating for filament voltage doubler
  87. SE vs PP for SET amps
  88. Use "mu output" from depletion mode MOSFET load?
  89. GM70 SE mov rectifiers
  90. First Preamp build
  91. Fisher KX-200 driving a pair of ESL from the plates
  92. Disadvantages of unbalanced tube
  93. The anatomy of a vacuum toob
  94. Valve Amplification Company CLA1 mkii help
  95. leak stereo 20 channel imbalance
  96. Mains powered 20W submin bridge amp
  97. SS rectification ST70
  98. K-12g ultra fast diode mod UF4007
  99. WE46c..
  100. 10 Pin B10A socket
  101. RIAA network adjustment
  102. audio research sp16
  103. Visiting Japan
  104. "up-rating" power filter chokes
  105. Differential pair gain/ where to apply feedback
  106. EL84 ECC83 SE Amp schematic
  107. high B+ voltage drop
  108. Volume control chip
  109. Signal Ground
  110. New to 6DJ8 tube
  111. EL91 Max ratings ? help
  112. I need a distraction!
  113. 300B amp project
  114. "bevois valley" in triode
  115. Strange problem wit a 3 tube preamplifier
  116. JJ Tesla vs. Electro Harmonix for Hi-Fi EL84 SE?
  117. This Tube CB make
  118. tubecad el84 powersupply ps4 question
  119. ART Tube MP studio V3 problems
  120. Calculating Cathode Bias w/o tube curves?
  121. Cathode follower PA Driver in a cathode biased amp
  122. I have my first Valve Amp, help me not blow it up!
  123. Unison Research SR-1 schematic/service manual
  124. Mega Tube DIY project
  125. very very simple single ended 300b valve amp schematic?
  126. 300b with single stage driver, c3m or?
  127. Cap upgrade for SVP RIAA stage
  128. Quick Q about JC's upside down front end.
  129. Bogen beasts again
  130. I thought this was a joke...but..
  131. Black pollution
  132. Difference between 6N1P and 6N23P?
  133. low voltage AC umbilical advice
  134. RCA MI-4288J Amplifier - Any info?
  135. 3.5k OPT for 45 type tube?
  136. DIY/OOTB upgrade? PP/SE?
  137. Sansui AU70
  138. Moody 496 Schematic Wanted
  139. Center-tapped Plate Choke vs. OPT for PP plate loads
  140. Help sourcing some resistors with very special values for a project
  141. Power Transformer Rating?
  142. KT120 x 4 / 240W Push Pull TUBE AMP MONOBLOCKS
  143. How Much Wiring??
  144. Schematic request for Meixing Mingda MC-211
  145. 300B SE with an interstage
  146. 211/845 tubes in a 805 based amp ?
  147. Grid leak bias, how does it work?
  148. Melos Sha Gold Reference
  149. Tube Amp for MTM
  150. Dynaco ST-70 Series III
  151. #27 + 6N8S Mu-Follower: Vhk Max Question
  152. Tube Mic preamp with compressor - any ideas?
  153. Counterpoint Sa-5000 and Klimo Kent - needed service manuals
  154. Drawing loadline using interstage / choosing interstage
  155. My New Iron for Single Ended 2a3
  156. GU-50 push pull amplifier
  157. 12SL7GT vs 12SN7GT
  158. DIY power amp and speakers
  159. KT88 SE
  160. Building a 6bq5 set amp
  161. OPT DC question
  162. Suitable speakers for a Leak Stereo 20
  163. Need advice on tube record player power jack.
  164. 12a_7 or 6SN7 phono preamp suggestions
  165. ECC99 as input stage for 300B?
  166. Drawbacks to over-speccing filament trannies?
  167. Thoughts on Western Electric amp redesign
  168. Adding choke to a power supply
  169. Broskie unbalancer and Aikido Help
  170. Mounting output tran and filter choke together
  171. Capacitors for tube amp rebuild
  172. Diving in, few questions
  173. SET Current Drop- Lack of Power, Saturation or Headroom?
  174. Power tubes: which is the maximum wire lenght for the cathode resistor to ground?
  175. Center Tapped Mains Transformer as Parafeed Plate Choke
  176. A tube newbie's review of the VTA ST-120
  177. Help Identifying Ebay Finds
  178. Led biasing or fixed biasing?
  179. diy vt-52 pushpull AMP
  180. Aikido Cathode Follower HUM Problem
  181. Superhet set HMV 438 Schematic help pls
  182. Output transformer for 100Hz and up
  183. Output transformers in series to simulate center-tap for push pull
  184. LED Biasing
  185. assembling a LITE LS-69 Hybrid Balance pre-amp
  186. Question about hifi power stage design
  187. Help with Magnavox EL84 Console restore
  188. Triode Loadline Simulator for dummies tutorial?
  189. Stromberg Carlson AP-54 schematic LTSPICE
  190. Resistor in series with S.E. O.T. ?
  191. Audio Valve Eklipse volume pot value?
  192. jensen vs mundorf
  193. 47 driving 300B questions
  194. 6T9 Amp
  195. Eico HF-32 PEC Loudness Circuit
  196. MV-100B tubes running extremely hot
  197. PCL 86 parafeed?
  198. Hammond 370FX
  199. Question about tube in Little Bear P8 - 6N5P
  200. Mini Pentode tube testing in Triode mode?
  201. Sencore Pr57 Iso Trans, Power Conditioner for amp?
  202. Is hot bias really sonic preferable versus cold bias ?
  203. Aikido Problem - B+ dropping too much
  204. Klemt Echolette M40 Schematic
  205. My S.E.T remade again - the DOS
  206. I need help to recognize these two vacuum tubes
  207. found a box...
  208. Advice on triode connecting a 'JZ6 tube
  209. Beard P100 pcb disassembly
  210. LM317 Heater 12ax7 ...not working
  211. 2A3 se amp power consumption
  212. "JJ" Tubes Vs other brands
  213. playing tube amps through a generator
  214. Need help with a preamp board I bought on eBay
  215. Question on Tube Rectifier..help please.
  216. 2A3 Hum Problems in SE (Please Help!)
  217. 240v to 110v for Sun Valley JB-300B
  218. Tubelab SPP Schematic
  219. SE output transformer
  220. single-ended.com annoyance
  221. A cheapo decent splitter
  222. Lightbulb Base Failure
  223. Madison Fielding Rcvr -- Filament Trick
  224. Converting from UL to Triode: Is this correct?
  225. white follower for driving mosfets.
  226. Distance between two audio input valves
  227. Series Caps on Power Supply
  228. Most expensive parts in DIY tube amp
  229. Filter Choke Selection
  230. 6072A as DAC outputstage
  231. adapting line level to suitcase record player
  232. Aikido Noval Stereo Questions
  233. 100K 2CH Volume pot recommendation
  234. Another Daft Idea
  235. Allen Model 75 user feedback needed
  236. My perfect 6550 PP amp :)
  237. Marantz 8b power transformer - open winding
  238. Chassis Grounding/ Comment on Chinese Schematic SRK-09
  239. Mini Carver Silver Seven?
  240. Using EL34 for allen wright's pp-2c
  241. Ampex 6973 mono blocks
  242. Antique Sound Lab AQ 2001 preamp issues
  243. Quad II hums
  244. Musical Fidelity XCAN V1
  245. Cathode Follower high power class B grid driver
  246. McIntosh MC 60 bias/voltage problem
  247. how to add a sub amp in parallel to S5-12G tube amplifier
  248. 5U4GB (rectifier) Arcing - What to think?
  249. I found these ripped pieces of paper..
  250. chassis grounding questions

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