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  1. Acquired free brand new Jolida 302a
  2. Help with restoration of Audio Research equipment
  3. Grommes 103gt tuner
  4. Frank’s 6SN7 pre & regulated supply
  5. Sleeping giant
  6. hum by mounting powertransformer and tubes on same chassis
  7. Rectifier tube overheating
  8. "World's Best Technical Master Craftsmen"
  9. OPT for 2A3
  10. getting rid of pre amp in a tube amp
  11. A question on OPT and no loads.
  12. Auto-Bias vs Manual bias vs EFB
  13. Russian receiving tubes and foreign equivalents
  14. B+ delay timer module
  15. Testing DIY triodes
  16. Adding a dummy load to prevent amp from being damaged by having no load?
  17. 30 watt class A chopper controlled bias with 6 EL84
  18. Input resistor (What are purposes?)
  19. Posted new 300B push-pull amp design
  20. Help me source a pair of OPT for Knight KG-240 tube amp
  21. Help Pick Transformers for EICO HF-87
  22. PreAmp
  23. Original price of the Conrad Johnson PV-5
  24. balance pots in Williamson driver stage
  25. Another Question on Tektronix Transformers
  26. Philco K1629 Upgrade Options
  27. My return to tubes, via headphones - what circuit would you recommend?
  28. High Quality EL84 UL SE Amplifier
  29. regulated supply to CCS plate load
  30. Twin Audio Sinfonia Preamp
  31. ecll800 schematic confusion
  32. 6L6 recommendations
  33. tube 100th
  34. Luxman OY15-5k OPT?
  35. Has anyone had experience with Russian 5C8S and 5C9S?
  36. New Here looking for info on rare SVIKO russian made 6KG6 monoblocks
  37. EL 84 pp amp - simple regulated circuit sought
  38. Any tube amp to drive B&W 802D?
  39. New to valve amplifiers
  40. SE 6GW8 output transformer with 5 wires.
  41. Mr.Curwen's single ended adventures
  42. Tube magic eye with em84-sensitivity?!
  43. Tube test
  44. Brimar 6V6 USSR
  45. World Design KT88 Kit
  46. Opinions appreciated: Lafayette LA 224b vs. McIntosh 225
  47. Clone X10D problems distortion / saturation ... help!
  48. 12DW7 or 12AU7+12AX7 if stereo?
  49. First preamp and gain control
  50. Tube life..
  51. Berman 76 preamplifier, I need some advice please
  52. Old Tube amp missing tubes. HELP
  53. Going to Berlin, looking for electronics diy shops
  54. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  55. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  56. Help with Eico ST70
  57. Class-D and Tube buffer/preamp off same 12V SLA?
  58. Gu50 or 1624 PP amp first trials
  59. cathode follower driver A2
  60. High Pass Filter for OTL headphone Amp
  61. Bewitch 6550 Balance Issue
  62. ground hum issues in an old peak st-100
  63. Need an APPJ PA0901A Mini Amp Output Transformer.
  64. VTL Tiny Triode Schematics?
  65. A question of dynamics: Amplifier design?
  66. Rechargeable battery for cathode bias: open discussion
  67. High quality tube socket for 4P1L tube ?
  68. VTL Schematic needed
  69. Diode rating for filament voltage doubler
  70. SE vs PP for SET amps
  71. Use "mu output" from depletion mode MOSFET load?
  72. GM70 SE mov rectifiers
  73. First Preamp build
  74. Fisher KX-200 driving a pair of ESL from the plates
  75. Disadvantages of unbalanced tube
  76. The anatomy of a vacuum toob
  77. Valve Amplification Company CLA1 mkii help
  78. leak stereo 20 channel imbalance
  79. Mains powered 20W submin bridge amp
  80. SS rectification ST70
  81. K-12g ultra fast diode mod UF4007
  82. WE46c..
  83. 10 Pin B10A socket
  84. RIAA network adjustment
  85. audio research sp16
  86. Visiting Japan
  87. "up-rating" power filter chokes
  88. Differential pair gain/ where to apply feedback
  89. EL84 ECC83 SE Amp schematic
  90. high B+ voltage drop
  91. Volume control chip
  92. Signal Ground
  93. New to 6DJ8 tube
  94. EL91 Max ratings ? help
  95. I need a distraction!
  96. 300B amp project
  97. "bevois valley" in triode
  98. Strange problem wit a 3 tube preamplifier
  99. JJ Tesla vs. Electro Harmonix for Hi-Fi EL84 SE?
  100. This Tube CB make
  101. tubecad el84 powersupply ps4 question
  102. ART Tube MP studio V3 problems
  103. Calculating Cathode Bias w/o tube curves?
  104. Cathode follower PA Driver in a cathode biased amp
  105. I have my first Valve Amp, help me not blow it up!
  106. Unison Research SR-1 schematic/service manual
  107. Mega Tube DIY project
  108. very very simple single ended 300b valve amp schematic?
  109. 300b with single stage driver, c3m or?
  110. Cap upgrade for SVP RIAA stage
  111. Quick Q about JC's upside down front end.
  112. Bogen beasts again
  113. I thought this was a joke...but..
  114. Black pollution
  115. Difference between 6N1P and 6N23P?
  116. low voltage AC umbilical advice
  117. RCA MI-4288J Amplifier - Any info?
  118. 3.5k OPT for 45 type tube?
  119. DIY/OOTB upgrade? PP/SE?
  120. Sansui AU70
  121. Moody 496 Schematic Wanted
  122. Center-tapped Plate Choke vs. OPT for PP plate loads
  123. Help sourcing some resistors with very special values for a project
  124. Power Transformer Rating?
  125. KT120 x 4 / 240W Push Pull TUBE AMP MONOBLOCKS
  126. How Much Wiring??
  127. Schematic request for Meixing Mingda MC-211
  128. 300B SE with an interstage
  129. 211/845 tubes in a 805 based amp ?
  130. Grid leak bias, how does it work?
  131. Melos Sha Gold Reference
  132. Tube Amp for MTM
  133. Dynaco ST-70 Series III
  134. #27 + 6N8S Mu-Follower: Vhk Max Question
  135. Counterpoint Sa-5000 and Klimo Kent - needed service manuals
  136. Drawing loadline using interstage / choosing interstage
  137. My New Iron for Single Ended 2a3
  138. GU-50 push pull amplifier
  139. 12SL7GT vs 12SN7GT
  140. DIY power amp and speakers
  141. KT88 SE
  142. Building a 6bq5 set amp
  143. OPT DC question
  144. Suitable speakers for a Leak Stereo 20
  145. Need advice on tube record player power jack.
  146. 12a_7 or 6SN7 phono preamp suggestions
  147. ECC99 as input stage for 300B?
  148. Drawbacks to over-speccing filament trannies?
  149. Thoughts on Western Electric amp redesign
  150. Adding choke to a power supply
  151. Broskie unbalancer and Aikido Help
  152. Mounting output tran and filter choke together
  153. Capacitors for tube amp rebuild
  154. Diving in, few questions
  155. SET Current Drop- Lack of Power, Saturation or Headroom?
  156. Power tubes: which is the maximum wire lenght for the cathode resistor to ground?
  157. Center Tapped Mains Transformer as Parafeed Plate Choke
  158. A tube newbie's review of the VTA ST-120
  159. Help Identifying Ebay Finds
  160. Led biasing or fixed biasing?
  161. diy vt-52 pushpull AMP
  162. Aikido Cathode Follower HUM Problem
  163. Superhet set HMV 438 Schematic help pls
  164. Output transformer for 100Hz and up
  165. Output transformers in series to simulate center-tap for push pull
  166. LED Biasing
  167. assembling a LITE LS-69 Hybrid Balance pre-amp
  168. Question about hifi power stage design
  169. Help with Magnavox EL84 Console restore
  170. Triode Loadline Simulator for dummies tutorial?
  171. Stromberg Carlson AP-54 schematic LTSPICE
  172. Resistor in series with S.E. O.T. ?
  173. Audio Valve Eklipse volume pot value?
  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. My S.E.T remade again - the DOS
  186. I need help to recognize these two vacuum tubes
  187. found a box...
  188. Advice on triode connecting a 'JZ6 tube
  189. Beard P100 pcb disassembly
  190. LM317 Heater 12ax7 ...not working
  191. 2A3 se amp power consumption
  192. "JJ" Tubes Vs other brands
  193. Need help with a preamp board I bought on eBay
  194. Question on Tube Rectifier..help please.
  195. 2A3 Hum Problems in SE (Please Help!)
  196. 240v to 110v for Sun Valley JB-300B
  197. SE output transformer
  198. single-ended.com annoyance
  199. A cheapo decent splitter
  200. Lightbulb Base Failure
  201. Madison Fielding Rcvr -- Filament Trick
  202. Converting from UL to Triode: Is this correct?
  203. white follower for driving mosfets.
  204. Distance between two audio input valves
  205. Series Caps on Power Supply
  206. Most expensive parts in DIY tube amp
  207. Filter Choke Selection
  208. 6072A as DAC outputstage
  209. adapting line level to suitcase record player
  210. Aikido Noval Stereo Questions
  211. 100K 2CH Volume pot recommendation
  212. Another Daft Idea
  213. Allen Model 75 user feedback needed
  214. My perfect 6550 PP amp :)
  215. Marantz 8b power transformer - open winding
  216. Chassis Grounding/ Comment on Chinese Schematic SRK-09
  217. Mini Carver Silver Seven?
  218. Using EL34 for allen wright's pp-2c
  219. Ampex 6973 mono blocks
  220. Antique Sound Lab AQ 2001 preamp issues
  221. Quad II hums
  222. Musical Fidelity XCAN V1
  223. Cathode Follower high power class B grid driver
  224. McIntosh MC 60 bias/voltage problem
  225. how to add a sub amp in parallel to S5-12G tube amplifier
  226. 5U4GB (rectifier) Arcing - What to think?
  227. I found these ripped pieces of paper..
  228. chassis grounding questions
  229. motorola ecl82 3 channel amp?
  230. Parallel Push Pull Circuit?
  231. Older valve amps chassis grounding
  232. Just about settled on building my first amp.
  233. 6L6 Triode AB Push/Pull Pout
  234. Schade and CFB exactly equivalent
  235. need some advice on updating this one
  236. Abdellah KT88 cathode follower addition?
  237. Where to buy vacuum tubes in Hong Kong city?
  238. Help needed on restoring a Bogen AP-200 amp
  239. Two driver options for 300B push pull
  240. Heath Williamson type W-3M
  241. 6n3c 12ax7 amplifier
  242. HELP needed to design/build DRD 6C33C SET
  243. k12g left channel is out
  244. Yaqin MC-100B... anyone modded for tape loop?
  245. Re-thinking Hybrid!
  246. History of RIAA standards
  247. GU48/833A medium power SET
  248. Bass control causing hum + no bass from left channel
  249. bad PX4? dark blue glow
  250. Soft Start/bucking transformer For Marantz 9 Monoblocks

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