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  1. Rechargeable battery for cathode bias: open discussion
  2. High quality tube socket for 4P1L tube ?
  3. VTL Schematic needed
  4. Diode rating for filament voltage doubler
  5. SE vs PP for SET amps
  6. Use "mu output" from depletion mode MOSFET load?
  7. GM70 SE mov rectifiers
  8. First Preamp build
  9. Fisher KX-200 driving a pair of ESL from the plates
  10. Disadvantages of unbalanced tube
  11. The anatomy of a vacuum toob
  12. Valve Amplification Company CLA1 mkii help
  13. leak stereo 20 channel imbalance
  14. Mains powered 20W submin bridge amp
  15. SS rectification ST70
  16. K-12g ultra fast diode mod UF4007
  17. WE46c..
  18. 10 Pin B10A socket
  19. RIAA network adjustment
  20. audio research sp16
  21. Visiting Japan
  22. "up-rating" power filter chokes
  23. Differential pair gain/ where to apply feedback
  24. EL84 ECC83 SE Amp schematic
  25. high B+ voltage drop
  26. Volume control chip
  27. Faylon P200 rebuild
  28. Signal Ground
  29. New to 6DJ8 tube
  30. EL91 Max ratings ? help
  31. I need a distraction!
  32. 300B amp project
  33. "bevois valley" in triode
  34. Strange problem wit a 3 tube preamplifier
  35. JJ Tesla vs. Electro Harmonix for Hi-Fi EL84 SE?
  36. This Tube CB make
  37. tubecad el84 powersupply ps4 question
  38. ART Tube MP studio V3 problems
  39. Calculating Cathode Bias w/o tube curves?
  40. Cathode follower PA Driver in a cathode biased amp
  41. I have my first Valve Amp, help me not blow it up!
  42. Unison Research SR-1 schematic/service manual
  43. Mega Tube DIY project
  44. very very simple single ended 300b valve amp schematic?
  45. 300b with single stage driver, c3m or?
  46. Cap upgrade for SVP RIAA stage
  47. Quick Q about JC's upside down front end.
  48. Bogen beasts again
  49. I thought this was a joke...but..
  50. Black pollution
  51. Difference between 6N1P and 6N23P?
  52. low voltage AC umbilical advice
  53. RCA MI-4288J Amplifier - Any info?
  54. 3.5k OPT for 45 type tube?
  55. DIY/OOTB upgrade? PP/SE?
  56. Sansui AU70
  57. Moody 496 Schematic Wanted
  58. Center-tapped Plate Choke vs. OPT for PP plate loads
  59. Help sourcing some resistors with very special values for a project
  60. Power Transformer Rating?
  61. KT120 x 4 / 240W Push Pull TUBE AMP MONOBLOCKS
  62. How Much Wiring??
  63. Schematic request for Meixing Mingda MC-211
  64. 300B SE with an interstage
  65. 211/845 tubes in a 805 based amp ?
  66. Grid leak bias, how does it work?
  67. Melos Sha Gold Reference
  68. Tube Amp for MTM
  69. Dynaco ST-70 Series III
  70. #27 + 6N8S Mu-Follower: Vhk Max Question
  71. Tube Mic preamp with compressor - any ideas?
  72. Counterpoint Sa-5000 and Klimo Kent - needed service manuals
  73. Drawing loadline using interstage / choosing interstage
  74. My New Iron for Single Ended 2a3
  75. GU-50 push pull amplifier
  76. 12SL7GT vs 12SN7GT
  77. DIY power amp and speakers
  78. KT88 SE
  79. Building a 6bq5 set amp
  80. OPT DC question
  81. Suitable speakers for a Leak Stereo 20
  82. Need advice on tube record player power jack.
  83. 12a_7 or 6SN7 phono preamp suggestions
  84. ECC99 as input stage for 300B?
  85. Drawbacks to over-speccing filament trannies?
  86. Thoughts on Western Electric amp redesign
  87. Adding choke to a power supply
  88. Broskie unbalancer and Aikido Help
  89. Mounting output tran and filter choke together
  90. Capacitors for tube amp rebuild
  91. Diving in, few questions
  92. SET Current Drop- Lack of Power, Saturation or Headroom?
  93. Power tubes: which is the maximum wire lenght for the cathode resistor to ground?
  94. Center Tapped Mains Transformer as Parafeed Plate Choke
  95. A tube newbie's review of the VTA ST-120
  96. Help Identifying Ebay Finds
  97. Led biasing or fixed biasing?
  98. diy vt-52 pushpull AMP
  99. Aikido Cathode Follower HUM Problem
  100. Superhet set HMV 438 Schematic help pls
  101. Output transformer for 100Hz and up
  102. Output transformers in series to simulate center-tap for push pull
  103. LED Biasing
  104. assembling a LITE LS-69 Hybrid Balance pre-amp
  105. Question about hifi power stage design
  106. Help with Magnavox EL84 Console restore
  107. Triode Loadline Simulator for dummies tutorial?
  108. Stromberg Carlson AP-54 schematic LTSPICE
  109. Resistor in series with S.E. O.T. ?
  110. Audio Valve Eklipse volume pot value?
  111. jensen vs mundorf
  112. 47 driving 300B questions
  113. 6T9 Amp
  114. Eico HF-32 PEC Loudness Circuit
  115. MV-100B tubes running extremely hot
  116. PCL 86 parafeed?
  117. Hammond 370FX
  118. Question about tube in Little Bear P8 - 6N5P
  119. Mini Pentode tube testing in Triode mode?
  120. Sencore Pr57 Iso Trans, Power Conditioner for amp?
  121. Is hot bias really sonic preferable versus cold bias ?
  122. Aikido Problem - B+ dropping too much
  123. Klemt Echolette M40 Schematic
  124. My S.E.T remade again - the DOS
  125. I need help to recognize these two vacuum tubes
  126. found a box...
  127. Advice on triode connecting a 'JZ6 tube
  128. 1961 Silvertone Model 4722 Organ Guitar amp conversion questions
  129. Beard P100 pcb disassembly
  130. LM317 Heater 12ax7 ...not working
  131. 2A3 se amp power consumption
  132. "JJ" Tubes Vs other brands
  133. playing tube amps through a generator
  134. Need help with a preamp board I bought on eBay
  135. Question on Tube Rectifier..help please.
  136. 2A3 Hum Problems in SE (Please Help!)
  137. 240v to 110v for Sun Valley JB-300B
  138. Tubelab SPP Schematic
  139. SE output transformer
  140. single-ended.com annoyance
  141. A cheapo decent splitter
  142. Lightbulb Base Failure
  143. Madison Fielding Rcvr -- Filament Trick
  144. Converting from UL to Triode: Is this correct?
  145. white follower for driving mosfets.
  146. Distance between two audio input valves
  147. Series Caps on Power Supply
  148. Most expensive parts in DIY tube amp
  149. Filter Choke Selection
  150. 6072A as DAC outputstage
  151. adapting line level to suitcase record player
  152. Aikido Noval Stereo Questions
  153. 100K 2CH Volume pot recommendation
  154. Another Daft Idea
  155. Allen Model 75 user feedback needed
  156. My perfect 6550 PP amp :)
  157. Marantz 8b power transformer - open winding
  158. Chassis Grounding/ Comment on Chinese Schematic SRK-09
  159. Mini Carver Silver Seven?
  160. Using EL34 for allen wright's pp-2c
  161. Ampex 6973 mono blocks
  162. Antique Sound Lab AQ 2001 preamp issues
  163. Quad II hums
  164. Musical Fidelity XCAN V1
  165. Cathode Follower high power class B grid driver
  166. McIntosh MC 60 bias/voltage problem
  167. how to add a sub amp in parallel to S5-12G tube amplifier
  168. 5U4GB (rectifier) Arcing - What to think?
  169. I found these ripped pieces of paper..
  170. chassis grounding questions
  171. motorola ecl82 3 channel amp?
  172. Parallel Push Pull Circuit?
  173. Older valve amps chassis grounding
  174. Just about settled on building my first amp.
  175. 6L6 Triode AB Push/Pull Pout
  176. Schade and CFB exactly equivalent
  177. need some advice on updating this one
  178. Abdellah KT88 cathode follower addition?
  179. Where to buy vacuum tubes in Hong Kong city?
  180. Help needed on restoring a Bogen AP-200 amp
  181. homemade case for a homemade amplifier
  182. Two driver options for 300B push pull
  183. Heath Williamson type W-3M
  184. 6n3c 12ax7 amplifier
  185. HELP needed to design/build DRD 6C33C SET
  186. k12g left channel is out
  187. Yaqin MC-100B... anyone modded for tape loop?
  188. Simple Se build, Which tube?
  189. Re-thinking Hybrid!
  190. History of RIAA standards
  191. GU48/833A medium power SET
  192. Bass control causing hum + no bass from left channel
  193. bad PX4? dark blue glow
  194. Soft Start/bucking transformer For Marantz 9 Monoblocks
  195. Direct coupling with CCS
  196. 407A/B Preamp
  197. Bad 845 tube? (video link)
  198. Blues Jr. Mods
  199. Dynaco PAS 4
  200. OTL Amplifier in 1990 Glass Audio Magazine
  201. Volume drop when playing and hiss noise at turning off from one channel
  202. OPT in or near loudspeaker?
  203. Soft start for tube amplifier
  204. Transformer Sizing, etc
  205. 4P1L filament oscillation
  206. Toroidal power transformers in a tube amp
  207. No left channel output
  208. Conrar Johnson PV-10 squeal!
  209. Need expert help on EL34 SE tube amplifier.
  210. Coupling Caps
  211. 12pin/compactron tube socket
  212. Aikido audio problem w/ mains voltage fluctuations
  213. Radford STA-12
  214. New popping sound from my amp
  215. Line stage experiments with 6sn7
  216. simple SE headphone amp
  217. Aesthetix Metis Linestage
  218. Problem with Antique Sounds Pre Amp
  219. Output coupling capacitor question
  220. Screen Voltage present without B+
  221. jolida jd3000b preamp
  222. Need help on output transformer wiring alternatives
  223. Hi-End Push-Pull universal driver
  224. schematic for pentode 42 SE
  225. 6L6 / EL34 / EL84 / 6V6 frequency response curves?
  226. cheap and dirty supply
  227. EL84 SET red plating problem
  228. Using Aikido Topology to make Phono Preamp and Power Supply
  229. 5687 & OB2 as an excellent HT regulator
  230. 6S45P-E questions
  231. Extreme hybrid, a 100W with the vacuum tube sound
  232. Test Settings for a EL33/6AG6/6M6 on Eico 628 tester
  233. Chinook (Baby Amp II)
  234. Einstein Amplifier Input and Driver Section
  235. Tube System for Symphony/Jazz
  236. What is the purpose of C3 & C4?
  237. Yes, I'm the one who bought it...
  238. Capacitor Values
  239. Parks Audio / Triode ST35 kit?
  240. noob question.
  241. First stereo amp "Newbie" questions
  242. Newbie tries to design an amp
  243. Help - analysis on an output KT88 PP amp
  244. 12T10 triode connection - similar "real" triode to compare to?
  245. Recommendations for tube preamp (vinyl playback)
  246. Magnavox 8802 refurb boutique or standard parts.
  247. Allen model 75 organ amplifiers modifications
  248. Capacitance of rectifier tubes/valves near V=0??
  249. Volume/selector switch
  250. Auto Bias w/ LM317

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