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  1. OPT for 2A3
  2. getting rid of pre amp in a tube amp
  3. A question on OPT and no loads.
  4. Auto-Bias vs Manual bias vs EFB
  5. Russian receiving tubes and foreign equivalents
  6. B+ delay timer module
  7. Testing DIY triodes
  8. Adding a dummy load to prevent amp from being damaged by having no load?
  9. 30 watt class A chopper controlled bias with 6 EL84
  10. THD
  11. Input resistor (What are purposes?)
  12. Posted new 300B push-pull amp design
  13. Help me source a pair of OPT for Knight KG-240 tube amp
  14. Help Pick Transformers for EICO HF-87
  15. PreAmp
  16. Original price of the Conrad Johnson PV-5
  17. balance pots in Williamson driver stage
  18. Another Question on Tektronix Transformers
  19. Philco K1629 Upgrade Options
  20. My return to tubes, via headphones - what circuit would you recommend?
  21. High Quality EL84 UL SE Amplifier
  22. regulated supply to CCS plate load
  23. Twin Audio Sinfonia Preamp
  24. ecll800 schematic confusion
  25. 6L6 recommendations
  26. tube 100th
  27. Luxman OY15-5k OPT?
  28. Has anyone had experience with Russian 5C8S and 5C9S?
  29. New Here looking for info on rare SVIKO russian made 6KG6 monoblocks
  30. DC-DC converters
  31. EL 84 pp amp - simple regulated circuit sought
  32. Any tube amp to drive B&W 802D?
  33. New to valve amplifiers
  34. SE 6GW8 output transformer with 5 wires.
  35. Mr.Curwen's single ended adventures
  36. Tube magic eye with em84-sensitivity?!
  37. Tube test
  38. Brimar 6V6 USSR
  39. Construction Guides
  40. World Design KT88 Kit
  41. Opinions appreciated: Lafayette LA 224b vs. McIntosh 225
  42. Clone X10D problems distortion / saturation ... help!
  43. 12DW7 or 12AU7+12AX7 if stereo?
  44. First preamp and gain control
  45. Tube life..
  46. Berman 76 preamplifier, I need some advice please
  47. How to light GM70 tube as decorative?
  48. Old Tube amp missing tubes. HELP
  49. Going to Berlin, looking for electronics diy shops
  50. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  51. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  52. Help with Eico ST70
  53. Class-D and Tube buffer/preamp off same 12V SLA?
  54. Hard time to find High Voltage medium power linear BJT
  55. Gu50 or 1624 PP amp first trials
  56. cathode follower driver A2
  57. High Pass Filter for OTL headphone Amp
  58. Bewitch 6550 Balance Issue
  59. ground hum issues in an old peak st-100
  60. Need an APPJ PA0901A Mini Amp Output Transformer.
  61. VTL Tiny Triode Schematics?
  62. A question of dynamics: Amplifier design?
  63. Rechargeable battery for cathode bias: open discussion
  64. High quality tube socket for 4P1L tube ?
  65. VTL Schematic needed
  66. Diode rating for filament voltage doubler
  67. SE vs PP for SET amps
  68. Use "mu output" from depletion mode MOSFET load?
  69. GM70 SE mov rectifiers
  70. First Preamp build
  71. Fisher KX-200 driving a pair of ESL from the plates
  72. Disadvantages of unbalanced tube
  73. The anatomy of a vacuum toob
  74. Valve Amplification Company CLA1 mkii help
  75. leak stereo 20 channel imbalance
  76. Mains powered 20W submin bridge amp
  77. SS rectification ST70
  78. K-12g ultra fast diode mod UF4007
  79. WE46c..
  80. 10 Pin B10A socket
  81. RIAA network adjustment
  82. audio research sp16
  83. Visiting Japan
  84. "up-rating" power filter chokes
  85. Differential pair gain/ where to apply feedback
  86. EL84 ECC83 SE Amp schematic
  87. high B+ voltage drop
  88. Volume control chip
  89. Faylon P200 rebuild
  90. Signal Ground
  91. New to 6DJ8 tube
  92. EL91 Max ratings ? help
  93. I need a distraction!
  94. 300B amp project
  95. "bevois valley" in triode
  96. Strange problem wit a 3 tube preamplifier
  97. JJ Tesla vs. Electro Harmonix for Hi-Fi EL84 SE?
  98. This Tube CB make
  99. tubecad el84 powersupply ps4 question
  100. ART Tube MP studio V3 problems
  101. Calculating Cathode Bias w/o tube curves?
  102. Cathode follower PA Driver in a cathode biased amp
  103. I have my first Valve Amp, help me not blow it up!
  104. Unison Research SR-1 schematic/service manual
  105. Mega Tube DIY project
  106. very very simple single ended 300b valve amp schematic?
  107. 300b with single stage driver, c3m or?
  108. Cap upgrade for SVP RIAA stage
  109. Quick Q about JC's upside down front end.
  110. Bogen beasts again
  111. I thought this was a joke...but..
  112. Black pollution
  113. Difference between 6N1P and 6N23P?
  114. low voltage AC umbilical advice
  115. RCA MI-4288J Amplifier - Any info?
  116. 3.5k OPT for 45 type tube?
  117. DIY/OOTB upgrade? PP/SE?
  118. Sansui AU70
  119. Moody 496 Schematic Wanted
  120. Center-tapped Plate Choke vs. OPT for PP plate loads
  121. Help sourcing some resistors with very special values for a project
  122. Power Transformer Rating?
  123. KT120 x 4 / 240W Push Pull TUBE AMP MONOBLOCKS
  124. How Much Wiring??
  125. Schematic request for Meixing Mingda MC-211
  126. 300B SE with an interstage
  127. 211/845 tubes in a 805 based amp ?
  128. Grid leak bias, how does it work?
  129. Melos Sha Gold Reference
  130. Tube Amp for MTM
  131. Dynaco ST-70 Series III
  132. #27 + 6N8S Mu-Follower: Vhk Max Question
  133. Tube Mic preamp with compressor - any ideas?
  134. Counterpoint Sa-5000 and Klimo Kent - needed service manuals
  135. Drawing loadline using interstage / choosing interstage
  136. My New Iron for Single Ended 2a3
  137. GU-50 push pull amplifier
  138. 12SL7GT vs 12SN7GT
  139. DIY power amp and speakers
  140. KT88 SE
  141. Building a 6bq5 set amp
  142. OPT DC question
  143. Suitable speakers for a Leak Stereo 20
  144. Need advice on tube record player power jack.
  145. 12a_7 or 6SN7 phono preamp suggestions
  146. ECC99 as input stage for 300B?
  147. Drawbacks to over-speccing filament trannies?
  148. Thoughts on Western Electric amp redesign
  149. Adding choke to a power supply
  150. Broskie unbalancer and Aikido Help
  151. Mounting output tran and filter choke together
  152. Capacitors for tube amp rebuild
  153. Diving in, few questions
  154. SET Current Drop- Lack of Power, Saturation or Headroom?
  155. Power tubes: which is the maximum wire lenght for the cathode resistor to ground?
  156. Center Tapped Mains Transformer as Parafeed Plate Choke
  157. A tube newbie's review of the VTA ST-120
  158. Help Identifying Ebay Finds
  159. Led biasing or fixed biasing?
  160. diy vt-52 pushpull AMP
  161. Aikido Cathode Follower HUM Problem
  162. Superhet set HMV 438 Schematic help pls
  163. Output transformer for 100Hz and up
  164. Output transformers in series to simulate center-tap for push pull
  165. LED Biasing
  166. assembling a LITE LS-69 Hybrid Balance pre-amp
  167. Question about hifi power stage design
  168. Help with Magnavox EL84 Console restore
  169. Triode Loadline Simulator for dummies tutorial?
  170. Stromberg Carlson AP-54 schematic LTSPICE
  171. Resistor in series with S.E. O.T. ?
  172. Audio Valve Eklipse volume pot value?
  173. jensen vs mundorf
  174. 47 driving 300B questions
  175. 6T9 Amp
  176. Eico HF-32 PEC Loudness Circuit
  177. MV-100B tubes running extremely hot
  178. PCL 86 parafeed?
  179. Hammond 370FX
  180. Question about tube in Little Bear P8 - 6N5P
  181. Mini Pentode tube testing in Triode mode?
  182. Sencore Pr57 Iso Trans, Power Conditioner for amp?
  183. Is hot bias really sonic preferable versus cold bias ?
  184. Aikido Problem - B+ dropping too much
  185. Klemt Echolette M40 Schematic
  186. My S.E.T remade again - the DOS
  187. I need help to recognize these two vacuum tubes
  188. found a box...
  189. Advice on triode connecting a 'JZ6 tube
  190. Beard P100 pcb disassembly
  191. LM317 Heater 12ax7 ...not working
  192. 2A3 se amp power consumption
  193. "JJ" Tubes Vs other brands
  194. playing tube amps through a generator
  195. Need help with a preamp board I bought on eBay
  196. Question on Tube Rectifier..help please.
  197. 2A3 Hum Problems in SE (Please Help!)
  198. 240v to 110v for Sun Valley JB-300B
  199. Tubelab SPP Schematic
  200. SE output transformer
  201. single-ended.com annoyance
  202. A cheapo decent splitter
  203. Lightbulb Base Failure
  204. Madison Fielding Rcvr -- Filament Trick
  205. Converting from UL to Triode: Is this correct?
  206. white follower for driving mosfets.
  207. Distance between two audio input valves
  208. Series Caps on Power Supply
  209. Most expensive parts in DIY tube amp
  210. Filter Choke Selection
  211. 6072A as DAC outputstage
  212. adapting line level to suitcase record player
  213. Aikido Noval Stereo Questions
  214. 100K 2CH Volume pot recommendation
  215. Another Daft Idea
  216. Allen Model 75 user feedback needed
  217. My perfect 6550 PP amp :)
  218. Marantz 8b power transformer - open winding
  219. Chassis Grounding/ Comment on Chinese Schematic SRK-09
  220. Mini Carver Silver Seven?
  221. Using EL34 for allen wright's pp-2c
  222. Ampex 6973 mono blocks
  223. Antique Sound Lab AQ 2001 preamp issues
  224. Quad II hums
  225. Musical Fidelity XCAN V1
  226. Cathode Follower high power class B grid driver
  227. McIntosh MC 60 bias/voltage problem
  228. how to add a sub amp in parallel to S5-12G tube amplifier
  229. 5U4GB (rectifier) Arcing - What to think?
  230. I found these ripped pieces of paper..
  231. chassis grounding questions
  232. motorola ecl82 3 channel amp?
  233. Parallel Push Pull Circuit?
  234. Older valve amps chassis grounding
  235. Just about settled on building my first amp.
  236. 6L6 Triode AB Push/Pull Pout
  237. Schade and CFB exactly equivalent
  238. need some advice on updating this one
  239. Abdellah KT88 cathode follower addition?
  240. Where to buy vacuum tubes in Hong Kong city?
  241. Help needed on restoring a Bogen AP-200 amp
  242. homemade case for a homemade amplifier
  243. Two driver options for 300B push pull
  244. Heath Williamson type W-3M
  245. 6n3c 12ax7 amplifier
  246. HELP needed to design/build DRD 6C33C SET
  247. k12g left channel is out
  248. Yaqin MC-100B... anyone modded for tape loop?
  249. Simple Se build, Which tube?
  250. Re-thinking Hybrid!

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