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  1. Black pollution
  2. Difference between 6N1P and 6N23P?
  3. low voltage AC umbilical advice
  4. RCA MI-4288J Amplifier - Any info?
  5. 3.5k OPT for 45 type tube?
  6. DIY/OOTB upgrade? PP/SE?
  7. Sansui AU70
  8. Moody 496 Schematic Wanted
  9. Center-tapped Plate Choke vs. OPT for PP plate loads
  10. Help sourcing some resistors with very special values for a project
  11. Power Transformer Rating?
  12. KT120 x 4 / 240W Push Pull TUBE AMP MONOBLOCKS
  13. How Much Wiring??
  14. Schematic request for Meixing Mingda MC-211
  15. 300B SE with an interstage
  16. 211/845 tubes in a 805 based amp ?
  17. Grid leak bias, how does it work?
  18. Melos Sha Gold Reference
  19. Tube Amp for MTM
  20. Dynaco ST-70 Series III
  21. #27 + 6N8S Mu-Follower: Vhk Max Question
  22. Counterpoint Sa-5000 and Klimo Kent - needed service manuals
  23. Drawing loadline using interstage / choosing interstage
  24. My New Iron for Single Ended 2a3
  25. GU-50 push pull amplifier
  26. 12SL7GT vs 12SN7GT
  27. DIY power amp and speakers
  28. KT88 SE
  29. Building a 6bq5 set amp
  30. OPT DC question
  31. Suitable speakers for a Leak Stereo 20
  32. Need advice on tube record player power jack.
  33. 12a_7 or 6SN7 phono preamp suggestions
  34. ECC99 as input stage for 300B?
  35. Drawbacks to over-speccing filament trannies?
  36. Thoughts on Western Electric amp redesign
  37. Adding choke to a power supply
  38. Broskie unbalancer and Aikido Help
  39. Mounting output tran and filter choke together
  40. Capacitors for tube amp rebuild
  41. Diving in, few questions
  42. SET Current Drop- Lack of Power, Saturation or Headroom?
  43. Power tubes: which is the maximum wire lenght for the cathode resistor to ground?
  44. Center Tapped Mains Transformer as Parafeed Plate Choke
  45. A tube newbie's review of the VTA ST-120
  46. Help Identifying Ebay Finds
  47. Led biasing or fixed biasing?
  48. diy vt-52 pushpull AMP
  49. Aikido Cathode Follower HUM Problem
  50. Superhet set HMV 438 Schematic help pls
  51. Output transformer for 100Hz and up
  52. Output transformers in series to simulate center-tap for push pull
  53. LED Biasing
  54. assembling a LITE LS-69 Hybrid Balance pre-amp
  55. Question about hifi power stage design
  56. Help with Magnavox EL84 Console restore
  57. Triode Loadline Simulator for dummies tutorial?
  58. Stromberg Carlson AP-54 schematic LTSPICE
  59. Resistor in series with S.E. O.T. ?
  60. Audio Valve Eklipse volume pot value?
  61. 47 driving 300B questions
  62. 6T9 Amp
  63. Eico HF-32 PEC Loudness Circuit
  64. MV-100B tubes running extremely hot
  65. PCL 86 parafeed?
  66. Hammond 370FX
  67. Question about tube in Little Bear P8 - 6N5P
  68. Mini Pentode tube testing in Triode mode?
  69. Sencore Pr57 Iso Trans, Power Conditioner for amp?
  70. Is hot bias really sonic preferable versus cold bias ?
  71. Aikido Problem - B+ dropping too much
  72. My S.E.T remade again - the DOS
  73. I need help to recognize these two vacuum tubes
  74. found a box...
  75. Advice on triode connecting a 'JZ6 tube
  76. Beard P100 pcb disassembly
  77. LM317 Heater 12ax7 ...not working
  78. 2A3 se amp power consumption
  79. "JJ" Tubes Vs other brands
  80. Need help with a preamp board I bought on eBay
  81. Question on Tube Rectifier..help please.
  82. 2A3 Hum Problems in SE (Please Help!)
  83. 240v to 110v for Sun Valley JB-300B
  84. SE output transformer
  85. single-ended.com annoyance
  86. A cheapo decent splitter
  87. Lightbulb Base Failure
  88. Madison Fielding Rcvr -- Filament Trick
  89. Converting from UL to Triode: Is this correct?
  90. white follower for driving mosfets.
  91. Distance between two audio input valves
  92. Series Caps on Power Supply
  93. Most expensive parts in DIY tube amp
  94. Filter Choke Selection
  95. 6072A as DAC outputstage
  96. adapting line level to suitcase record player
  97. Aikido Noval Stereo Questions
  98. 100K 2CH Volume pot recommendation
  99. Another Daft Idea
  100. Allen Model 75 user feedback needed
  101. My perfect 6550 PP amp :)
  102. Marantz 8b power transformer - open winding
  103. Chassis Grounding/ Comment on Chinese Schematic SRK-09
  104. Mini Carver Silver Seven?
  105. Using EL34 for allen wright's pp-2c
  106. Ampex 6973 mono blocks
  107. Antique Sound Lab AQ 2001 preamp issues
  108. Quad II hums
  109. Musical Fidelity XCAN V1
  110. Cathode Follower high power class B grid driver
  111. McIntosh MC 60 bias/voltage problem
  112. how to add a sub amp in parallel to S5-12G tube amplifier
  113. 5U4GB (rectifier) Arcing - What to think?
  114. I found these ripped pieces of paper..
  115. chassis grounding questions
  116. motorola ecl82 3 channel amp?
  117. Parallel Push Pull Circuit?
  118. Older valve amps chassis grounding
  119. Just about settled on building my first amp.
  120. 6L6 Triode AB Push/Pull Pout
  121. Schade and CFB exactly equivalent
  122. need some advice on updating this one
  123. Abdellah KT88 cathode follower addition?
  124. Where to buy vacuum tubes in Hong Kong city?
  125. Help needed on restoring a Bogen AP-200 amp
  126. Two driver options for 300B push pull
  127. Heath Williamson type W-3M
  128. 6n3c 12ax7 amplifier
  129. HELP needed to design/build DRD 6C33C SET
  130. k12g left channel is out
  131. Yaqin MC-100B... anyone modded for tape loop?
  132. Re-thinking Hybrid!
  133. History of RIAA standards
  134. GU48/833A medium power SET
  135. Bass control causing hum + no bass from left channel
  136. bad PX4? dark blue glow
  137. Soft Start/bucking transformer For Marantz 9 Monoblocks
  138. Direct coupling with CCS
  139. 407A/B Preamp
  140. Bad 845 tube? (video link)
  141. Dynaco PAS 4
  142. OTL Amplifier in 1990 Glass Audio Magazine
  143. Volume drop when playing and hiss noise at turning off from one channel
  144. OPT in or near loudspeaker?
  145. Soft start for tube amplifier
  146. Transformer Sizing, etc
  147. 4P1L filament oscillation
  148. Toroidal power transformers in a tube amp
  149. No left channel output
  150. Conrad Johnson PV-10 squeal!
  151. Need expert help on EL34 SE tube amplifier.
  152. 12pin/compactron tube socket
  153. Aikido audio problem w/ mains voltage fluctuations
  154. Radford STA-12
  155. New popping sound from my amp
  156. Line stage experiments with 6sn7
  157. simple SE headphone amp
  158. Aesthetix Metis Linestage
  159. Problem with Antique Sounds Pre Amp
  160. Output coupling capacitor question
  161. Screen Voltage present without B+
  162. jolida jd3000b preamp
  163. Need help on output transformer wiring alternatives
  164. Hi-End Push-Pull universal driver
  165. schematic for pentode 42 SE
  166. 6L6 / EL34 / EL84 / 6V6 frequency response curves?
  167. cheap and dirty supply
  168. EL84 SET red plating problem
  169. Using Aikido Topology to make Phono Preamp and Power Supply
  170. 5687 & OB2 as an excellent HT regulator
  171. 6S45P-E questions
  172. Extreme hybrid, a 100W with the vacuum tube sound
  173. Test Settings for a EL33/6AG6/6M6 on Eico 628 tester
  174. Chinook (Baby Amp II)
  175. Einstein Amplifier Input and Driver Section
  176. Tube System for Symphony/Jazz
  177. What is the purpose of C3 & C4?
  178. Yes, I'm the one who bought it...
  179. Capacitor Values
  180. Parks Audio / Triode ST35 kit?
  181. noob question.
  182. First stereo amp "Newbie" questions
  183. Newbie tries to design an amp
  184. Help - analysis on an output KT88 PP amp
  185. 12T10 triode connection - similar "real" triode to compare to?
  186. Recommendations for tube preamp (vinyl playback)
  187. Magnavox 8802 refurb boutique or standard parts.
  188. Allen model 75 organ amplifiers modifications
  189. Capacitance of rectifier tubes/valves near V=0??
  190. Volume/selector switch
  191. Auto Bias w/ LM317
  192. Volume drops and then comes back - anyone recognizes the sympthom?
  193. Cathode Follower and Volume Pot
  194. Dyna Mark III monoblocks. Driver boards and some questions on modding.
  195. switching a 5y3 for a 5y4?
  196. K-12M in Ultra Linear Mode Volume Issue
  197. SA 260 Pilot tube amplifier
  198. Standard Earmax Mod
  199. 470V using Bridge vs. 230V using Doubler
  200. Troublesome hybrid shengya a10..
  201. Heater Dropping Resistors
  202. Useing Mosfet in cathode leg of phase splitter
  203. Cleaning old tube sockets with common household products
  204. Automatic Bias Kit
  205. Triode mode Pentode G2 resistor?
  206. Rectifier.
  207. Tube gainstage for newbie
  208. Source follower irf720 or DN2540
  209. Toroidal OPT
  210. Tesla E83CC - Have done research & still havingt trouble spotting fakes from real
  211. SE Power amp SG2 voltage
  212. Bias supply
  213. 7377 tube socket
  214. Power Transformer Impedance Matching
  215. zenith console amplifier (a stereo mono amplifier :) )
  216. Trutone model Teeco 610-D
  217. electromagnetic hum problem
  218. Heathkit A7 Volume.
  219. Ribbon Tube Amp
  220. Brimar ECC83 with red bottom
  221. Dynaco ST 35 Cheap Transformers source in EU
  222. Transformer input for P-P
  223. Help Identifying 12au7a From Hammond Organ
  224. K502 Bleeder and LED
  225. Cathode follower attenuates signal
  226. Anyone has a curve tracer to trace Western Electric 436A 448A 418A in triode mode ?
  227. Breadboards and tube voltages
  228. Dynaco 35 Power Supply
  229. Magic eye with tube em80-schematic or circuit
  230. Using 220v amp in country with 230v
  231. Magic eye with EM81 tube - made in China
  232. Improvement Suggestion Wanted: 6AS7 Hybrid PP Amp
  233. Tube amp instability in LTSpice (Claus Byrith 4-30)
  234. Current mfg triode's
  235. K12g upgrades
  236. Help Needed Identifying a Custom Tube Amp
  237. 6dj8 6922 driver question
  238. APPJ PA0901A Repair
  239. Output tube G1 resistors question
  240. Building Mullard PP ECL86 stereo
  241. 6SN7 Parallel Preamp Anyone?
  242. Advice on Finishing my K502 Build
  243. Ferrite SE Outut XFMR for HF Tube Amp
  244. Question about grounding a 2-prong tube amp
  245. Grommes Mono Block
  246. EL84 triode mode @ 425V?
  247. Hybrid amp - Grounding Suggestions?
  248. Advises asked for, exquisite taste wanted!!
  249. need a good 2a3 socket... need advice
  250. Cathode feedback comments?

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