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  1. Clone X10D problems distortion / saturation ... help!
  2. 12DW7 or 12AU7+12AX7 if stereo?
  3. First preamp and gain control
  4. Tube life..
  5. Berman 76 preamplifier, I need some advice please
  6. Old Tube amp missing tubes. HELP
  7. Going to Berlin, looking for electronics diy shops
  8. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  9. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  10. Help with Eico ST70
  11. Class-D and Tube buffer/preamp off same 12V SLA?
  12. Gu50 or 1624 PP amp first trials
  13. cathode follower driver A2
  14. High Pass Filter for OTL headphone Amp
  15. Bewitch 6550 Balance Issue
  16. ground hum issues in an old peak st-100
  17. Need an APPJ PA0901A Mini Amp Output Transformer.
  18. VTL Tiny Triode Schematics?
  19. A question of dynamics: Amplifier design?
  20. Rechargeable battery for cathode bias: open discussion
  21. High quality tube socket for 4P1L tube ?
  22. VTL Schematic needed
  23. Diode rating for filament voltage doubler
  24. SE vs PP for SET amps
  25. Use "mu output" from depletion mode MOSFET load?
  26. GM70 SE mov rectifiers
  27. First Preamp build
  28. Fisher KX-200 driving a pair of ESL from the plates
  29. Disadvantages of unbalanced tube
  30. The anatomy of a vacuum toob
  31. Valve Amplification Company CLA1 mkii help
  32. leak stereo 20 channel imbalance
  33. Mains powered 20W submin bridge amp
  34. SS rectification ST70
  35. K-12g ultra fast diode mod UF4007
  36. WE46c..
  37. 10 Pin B10A socket
  38. RIAA network adjustment
  39. audio research sp16
  40. Visiting Japan
  41. "up-rating" power filter chokes
  42. Differential pair gain/ where to apply feedback
  43. EL84 ECC83 SE Amp schematic
  44. high B+ voltage drop
  45. Volume control chip
  46. Signal Ground
  47. New to 6DJ8 tube
  48. EL91 Max ratings ? help
  49. I need a distraction!
  50. 300B amp project
  51. "bevois valley" in triode
  52. Strange problem wit a 3 tube preamplifier
  53. JJ Tesla vs. Electro Harmonix for Hi-Fi EL84 SE?
  54. This Tube CB make
  55. tubecad el84 powersupply ps4 question
  56. ART Tube MP studio V3 problems
  57. Calculating Cathode Bias w/o tube curves?
  58. Cathode follower PA Driver in a cathode biased amp
  59. I have my first Valve Amp, help me not blow it up!
  60. Unison Research SR-1 schematic/service manual
  61. Mega Tube DIY project
  62. very very simple single ended 300b valve amp schematic?
  63. 300b with single stage driver, c3m or?
  64. Cap upgrade for SVP RIAA stage
  65. Quick Q about JC's upside down front end.
  66. Bogen beasts again
  67. I thought this was a joke...but..
  68. Black pollution
  69. Difference between 6N1P and 6N23P?
  70. low voltage AC umbilical advice
  71. RCA MI-4288J Amplifier - Any info?
  72. 3.5k OPT for 45 type tube?
  73. DIY/OOTB upgrade? PP/SE?
  74. Sansui AU70
  75. Moody 496 Schematic Wanted
  76. Center-tapped Plate Choke vs. OPT for PP plate loads
  77. Help sourcing some resistors with very special values for a project
  78. Power Transformer Rating?
  79. KT120 x 4 / 240W Push Pull TUBE AMP MONOBLOCKS
  80. How Much Wiring??
  81. Schematic request for Meixing Mingda MC-211
  82. 300B SE with an interstage
  83. 211/845 tubes in a 805 based amp ?
  84. Grid leak bias, how does it work?
  85. Melos Sha Gold Reference
  86. Tube Amp for MTM
  87. Dynaco ST-70 Series III
  88. #27 + 6N8S Mu-Follower: Vhk Max Question
  89. Counterpoint Sa-5000 and Klimo Kent - needed service manuals
  90. Drawing loadline using interstage / choosing interstage
  91. My New Iron for Single Ended 2a3
  92. GU-50 push pull amplifier
  93. 12SL7GT vs 12SN7GT
  94. DIY power amp and speakers
  95. KT88 SE
  96. Building a 6bq5 set amp
  97. OPT DC question
  98. Suitable speakers for a Leak Stereo 20
  99. Need advice on tube record player power jack.
  100. 12a_7 or 6SN7 phono preamp suggestions
  101. ECC99 as input stage for 300B?
  102. Drawbacks to over-speccing filament trannies?
  103. Thoughts on Western Electric amp redesign
  104. Adding choke to a power supply
  105. Broskie unbalancer and Aikido Help
  106. Mounting output tran and filter choke together
  107. Capacitors for tube amp rebuild
  108. Diving in, few questions
  109. SET Current Drop- Lack of Power, Saturation or Headroom?
  110. Power tubes: which is the maximum wire lenght for the cathode resistor to ground?
  111. Center Tapped Mains Transformer as Parafeed Plate Choke
  112. A tube newbie's review of the VTA ST-120
  113. Help Identifying Ebay Finds
  114. Led biasing or fixed biasing?
  115. diy vt-52 pushpull AMP
  116. Aikido Cathode Follower HUM Problem
  117. Superhet set HMV 438 Schematic help pls
  118. Output transformer for 100Hz and up
  119. Output transformers in series to simulate center-tap for push pull
  120. LED Biasing
  121. assembling a LITE LS-69 Hybrid Balance pre-amp
  122. Question about hifi power stage design
  123. Help with Magnavox EL84 Console restore
  124. Triode Loadline Simulator for dummies tutorial?
  125. Stromberg Carlson AP-54 schematic LTSPICE
  126. Resistor in series with S.E. O.T. ?
  127. Audio Valve Eklipse volume pot value?
  128. 47 driving 300B questions
  129. 6T9 Amp
  130. Eico HF-32 PEC Loudness Circuit
  131. MV-100B tubes running extremely hot
  132. PCL 86 parafeed?
  133. Hammond 370FX
  134. Question about tube in Little Bear P8 - 6N5P
  135. Mini Pentode tube testing in Triode mode?
  136. Sencore Pr57 Iso Trans, Power Conditioner for amp?
  137. Is hot bias really sonic preferable versus cold bias ?
  138. Aikido Problem - B+ dropping too much
  139. My S.E.T remade again - the DOS
  140. I need help to recognize these two vacuum tubes
  141. found a box...
  142. Advice on triode connecting a 'JZ6 tube
  143. Beard P100 pcb disassembly
  144. LM317 Heater 12ax7 ...not working
  145. 2A3 se amp power consumption
  146. "JJ" Tubes Vs other brands
  147. Need help with a preamp board I bought on eBay
  148. Question on Tube Rectifier..help please.
  149. 2A3 Hum Problems in SE (Please Help!)
  150. 240v to 110v for Sun Valley JB-300B
  151. SE output transformer
  152. single-ended.com annoyance
  153. A cheapo decent splitter
  154. Lightbulb Base Failure
  155. Madison Fielding Rcvr -- Filament Trick
  156. Converting from UL to Triode: Is this correct?
  157. white follower for driving mosfets.
  158. Distance between two audio input valves
  159. Series Caps on Power Supply
  160. Most expensive parts in DIY tube amp
  161. Filter Choke Selection
  162. 6072A as DAC outputstage
  163. adapting line level to suitcase record player
  164. Aikido Noval Stereo Questions
  165. 100K 2CH Volume pot recommendation
  166. Another Daft Idea
  167. Allen Model 75 user feedback needed
  168. My perfect 6550 PP amp :)
  169. Marantz 8b power transformer - open winding
  170. Chassis Grounding/ Comment on Chinese Schematic SRK-09
  171. Mini Carver Silver Seven?
  172. Using EL34 for allen wright's pp-2c
  173. Ampex 6973 mono blocks
  174. Antique Sound Lab AQ 2001 preamp issues
  175. Quad II hums
  176. Musical Fidelity XCAN V1
  177. Cathode Follower high power class B grid driver
  178. McIntosh MC 60 bias/voltage problem
  179. how to add a sub amp in parallel to S5-12G tube amplifier
  180. 5U4GB (rectifier) Arcing - What to think?
  181. I found these ripped pieces of paper..
  182. chassis grounding questions
  183. motorola ecl82 3 channel amp?
  184. Parallel Push Pull Circuit?
  185. Older valve amps chassis grounding
  186. Just about settled on building my first amp.
  187. 6L6 Triode AB Push/Pull Pout
  188. Schade and CFB exactly equivalent
  189. need some advice on updating this one
  190. Abdellah KT88 cathode follower addition?
  191. Where to buy vacuum tubes in Hong Kong city?
  192. Help needed on restoring a Bogen AP-200 amp
  193. Two driver options for 300B push pull
  194. Heath Williamson type W-3M
  195. 6n3c 12ax7 amplifier
  196. HELP needed to design/build DRD 6C33C SET
  197. k12g left channel is out
  198. Yaqin MC-100B... anyone modded for tape loop?
  199. Re-thinking Hybrid!
  200. History of RIAA standards
  201. GU48/833A medium power SET
  202. Bass control causing hum + no bass from left channel
  203. bad PX4? dark blue glow
  204. Soft Start/bucking transformer For Marantz 9 Monoblocks
  205. Direct coupling with CCS
  206. 407A/B Preamp
  207. Bad 845 tube? (video link)
  208. Dynaco PAS 4
  209. OTL Amplifier in 1990 Glass Audio Magazine
  210. Volume drop when playing and hiss noise at turning off from one channel
  211. OPT in or near loudspeaker?
  212. Soft start for tube amplifier
  213. Transformer Sizing, etc
  214. 4P1L filament oscillation
  215. Toroidal power transformers in a tube amp
  216. No left channel output
  217. Conrad Johnson PV-10 squeal!
  218. Need expert help on EL34 SE tube amplifier.
  219. 12pin/compactron tube socket
  220. Aikido audio problem w/ mains voltage fluctuations
  221. Radford STA-12
  222. New popping sound from my amp
  223. Line stage experiments with 6sn7
  224. simple SE headphone amp
  225. Aesthetix Metis Linestage
  226. Problem with Antique Sounds Pre Amp
  227. Output coupling capacitor question
  228. Screen Voltage present without B+
  229. jolida jd3000b preamp
  230. Need help on output transformer wiring alternatives
  231. Hi-End Push-Pull universal driver
  232. schematic for pentode 42 SE
  233. 6L6 / EL34 / EL84 / 6V6 frequency response curves?
  234. cheap and dirty supply
  235. EL84 SET red plating problem
  236. Using Aikido Topology to make Phono Preamp and Power Supply
  237. 5687 & OB2 as an excellent HT regulator
  238. 6S45P-E questions
  239. Extreme hybrid, a 100W with the vacuum tube sound
  240. Test Settings for a EL33/6AG6/6M6 on Eico 628 tester
  241. Chinook (Baby Amp II)
  242. Einstein Amplifier Input and Driver Section
  243. Tube System for Symphony/Jazz
  244. What is the purpose of C3 & C4?
  245. Yes, I'm the one who bought it...
  246. Capacitor Values
  247. Parks Audio / Triode ST35 kit?
  248. noob question.
  249. First stereo amp "Newbie" questions
  250. Newbie tries to design an amp

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