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  1. Cathode Follower as DAC Output Stage?
  2. Monoblock Gu-50 help.
  3. Aikido CF question
  4. Tube Power Amp Kit Recommendations
  5. EL34,KT66,6L6GC,KT77:who works better with high impedance OT load in SE Triode Mode?
  6. ECC40 Voltage Question
  7. Question re DC coupling vs RC coupling (AC)
  8. Can you tell the difference?
  9. Measuring ripple in filament supply (coleman reg)
  10. What about use largest possible capacitor as interstage decoupling ( 1 or 2uf)
  11. replace 6N3 tube preamp with mullard E555L
  12. Preamp to Poweramp tube proximity/spacing?
  13. List of Tube Noise Measurements - please nominate lowest noise tubes
  14. Just for interest
  15. Time to build the big one.
  16. Opinion? Would the input/driver from a HK-5 be good to replace original Mk3 ft. end??
  17. Has anyone built this kit?
  18. 22 AWG PTFE Wire jacket
  19. mu-follower with output transformer?
  20. ECC81 double triode tubes flashed brightly when switched on.
  21. pre amp with tone controll
  22. Making own hifi tube amp from scratch!!
  23. Pentode CCS as a load for long tailed pair?
  24. E88CC & 6N23P plate voltage range?
  25. First pre phono design [newbie]
  26. Struggling with LTspice - How to use .inc to get a tube to appear
  27. Eico St 40
  28. ECC88 Input/driverstage for F4 amp
  29. Tube headphone amp
  30. Rike Audio S-cap
  31. Acquired free brand new Jolida 302a
  32. Triode vs Transistor
  33. Help with restoration of Audio Research equipment
  34. Grommes 103gt tuner
  35. Frank’s 6SN7 pre & regulated supply
  36. Sleeping giant
  37. hum by mounting powertransformer and tubes on same chassis
  38. Rectifier tube overheating
  39. "World's Best Technical Master Craftsmen"
  40. OPT for 2A3
  41. getting rid of pre amp in a tube amp
  42. A question on OPT and no loads.
  43. Auto-Bias vs Manual bias vs EFB
  44. Russian receiving tubes and foreign equivalents
  45. B+ delay timer module
  46. Testing DIY triodes
  47. Adding a dummy load to prevent amp from being damaged by having no load?
  48. 30 watt class A chopper controlled bias with 6 EL84
  49. THD
  50. Input resistor (What are purposes?)
  51. Posted new 300B push-pull amp design
  52. Help me source a pair of OPT for Knight KG-240 tube amp
  53. Help Pick Transformers for EICO HF-87
  54. PreAmp
  55. Original price of the Conrad Johnson PV-5
  56. balance pots in Williamson driver stage
  57. Another Question on Tektronix Transformers
  58. Philco K1629 Upgrade Options
  59. My return to tubes, via headphones - what circuit would you recommend?
  60. High Quality EL84 UL SE Amplifier
  61. regulated supply to CCS plate load
  62. Twin Audio Sinfonia Preamp
  63. ecll800 schematic confusion
  64. 6L6 recommendations
  65. tube 100th
  66. Luxman OY15-5k OPT?
  67. Has anyone had experience with Russian 5C8S and 5C9S?
  68. New Here looking for info on rare SVIKO russian made 6KG6 monoblocks
  69. DC-DC converters
  70. EL 84 pp amp - simple regulated circuit sought
  71. Any tube amp to drive B&W 802D?
  72. New to valve amplifiers
  73. SE 6GW8 output transformer with 5 wires.
  74. Mr.Curwen's single ended adventures
  75. Tube magic eye with em84-sensitivity?!
  76. Tube test
  77. Brimar 6V6 USSR
  78. Construction Guides
  79. World Design KT88 Kit
  80. Opinions appreciated: Lafayette LA 224b vs. McIntosh 225
  81. Clone X10D problems distortion / saturation ... help!
  82. 12DW7 or 12AU7+12AX7 if stereo?
  83. First preamp and gain control
  84. Tube life..
  85. Berman 76 preamplifier, I need some advice please
  86. How to light GM70 tube as decorative?
  87. Old Tube amp missing tubes. HELP
  88. Going to Berlin, looking for electronics diy shops
  89. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  90. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  91. Help with Eico ST70
  92. Class-D and Tube buffer/preamp off same 12V SLA?
  93. Hard time to find High Voltage medium power linear BJT
  94. Gu50 or 1624 PP amp first trials
  95. cathode follower driver A2
  96. High Pass Filter for OTL headphone Amp
  97. Bewitch 6550 Balance Issue
  98. ground hum issues in an old peak st-100
  99. Need an APPJ PA0901A Mini Amp Output Transformer.
  100. VTL Tiny Triode Schematics?
  101. A question of dynamics: Amplifier design?
  102. Rechargeable battery for cathode bias: open discussion
  103. High quality tube socket for 4P1L tube ?
  104. VTL Schematic needed
  105. Diode rating for filament voltage doubler
  106. SE vs PP for SET amps
  107. Use "mu output" from depletion mode MOSFET load?
  108. GM70 SE mov rectifiers
  109. First Preamp build
  110. Fisher KX-200 driving a pair of ESL from the plates
  111. Disadvantages of unbalanced tube
  112. The anatomy of a vacuum toob
  113. Valve Amplification Company CLA1 mkii help
  114. leak stereo 20 channel imbalance
  115. Mains powered 20W submin bridge amp
  116. SS rectification ST70
  117. K-12g ultra fast diode mod UF4007
  118. WE46c..
  119. 10 Pin B10A socket
  120. RIAA network adjustment
  121. audio research sp16
  122. Visiting Japan
  123. "up-rating" power filter chokes
  124. Differential pair gain/ where to apply feedback
  125. EL84 ECC83 SE Amp schematic
  126. high B+ voltage drop
  127. Volume control chip
  128. Faylon P200 rebuild
  129. Signal Ground
  130. New to 6DJ8 tube
  131. EL91 Max ratings ? help
  132. I need a distraction!
  133. 300B amp project
  134. "bevois valley" in triode
  135. Strange problem wit a 3 tube preamplifier
  136. JJ Tesla vs. Electro Harmonix for Hi-Fi EL84 SE?
  137. This Tube CB make
  138. tubecad el84 powersupply ps4 question
  139. ART Tube MP studio V3 problems
  140. Calculating Cathode Bias w/o tube curves?
  141. Cathode follower PA Driver in a cathode biased amp
  142. I have my first Valve Amp, help me not blow it up!
  143. Unison Research SR-1 schematic/service manual
  144. Mega Tube DIY project
  145. very very simple single ended 300b valve amp schematic?
  146. 300b with single stage driver, c3m or?
  147. Cap upgrade for SVP RIAA stage
  148. Quick Q about JC's upside down front end.
  149. Bogen beasts again
  150. I thought this was a joke...but..
  151. Black pollution
  152. Difference between 6N1P and 6N23P?
  153. low voltage AC umbilical advice
  154. RCA MI-4288J Amplifier - Any info?
  155. 3.5k OPT for 45 type tube?
  156. DIY/OOTB upgrade? PP/SE?
  157. Sansui AU70
  158. Moody 496 Schematic Wanted
  159. Center-tapped Plate Choke vs. OPT for PP plate loads
  160. Help sourcing some resistors with very special values for a project
  161. Power Transformer Rating?
  162. KT120 x 4 / 240W Push Pull TUBE AMP MONOBLOCKS
  163. How Much Wiring??
  164. Schematic request for Meixing Mingda MC-211
  165. 300B SE with an interstage
  166. 211/845 tubes in a 805 based amp ?
  167. Grid leak bias, how does it work?
  168. Melos Sha Gold Reference
  169. Tube Amp for MTM
  170. Dynaco ST-70 Series III
  171. #27 + 6N8S Mu-Follower: Vhk Max Question
  172. Tube Mic preamp with compressor - any ideas?
  173. Counterpoint Sa-5000 and Klimo Kent - needed service manuals
  174. Drawing loadline using interstage / choosing interstage
  175. My New Iron for Single Ended 2a3
  176. GU-50 push pull amplifier
  177. 12SL7GT vs 12SN7GT
  178. DIY power amp and speakers
  179. KT88 SE
  180. Building a 6bq5 set amp
  181. OPT DC question
  182. Suitable speakers for a Leak Stereo 20
  183. Need advice on tube record player power jack.
  184. 12a_7 or 6SN7 phono preamp suggestions
  185. ECC99 as input stage for 300B?
  186. Drawbacks to over-speccing filament trannies?
  187. Thoughts on Western Electric amp redesign
  188. Adding choke to a power supply
  189. Broskie unbalancer and Aikido Help
  190. Mounting output tran and filter choke together
  191. Capacitors for tube amp rebuild
  192. Diving in, few questions
  193. SET Current Drop- Lack of Power, Saturation or Headroom?
  194. Power tubes: which is the maximum wire lenght for the cathode resistor to ground?
  195. Center Tapped Mains Transformer as Parafeed Plate Choke
  196. A tube newbie's review of the VTA ST-120
  197. Help Identifying Ebay Finds
  198. Led biasing or fixed biasing?
  199. diy vt-52 pushpull AMP
  200. Aikido Cathode Follower HUM Problem
  201. Superhet set HMV 438 Schematic help pls
  202. Output transformer for 100Hz and up
  203. Output transformers in series to simulate center-tap for push pull
  204. LED Biasing
  205. assembling a LITE LS-69 Hybrid Balance pre-amp
  206. Question about hifi power stage design
  207. Help with Magnavox EL84 Console restore
  208. Triode Loadline Simulator for dummies tutorial?
  209. Stromberg Carlson AP-54 schematic LTSPICE
  210. Resistor in series with S.E. O.T. ?
  211. Audio Valve Eklipse volume pot value?
  212. jensen vs mundorf
  213. 47 driving 300B questions
  214. 6T9 Amp
  215. Eico HF-32 PEC Loudness Circuit
  216. MV-100B tubes running extremely hot
  217. PCL 86 parafeed?
  218. Hammond 370FX
  219. Question about tube in Little Bear P8 - 6N5P
  220. Mini Pentode tube testing in Triode mode?
  221. Sencore Pr57 Iso Trans, Power Conditioner for amp?
  222. Is hot bias really sonic preferable versus cold bias ?
  223. Aikido Problem - B+ dropping too much
  224. Klemt Echolette M40 Schematic
  225. My S.E.T remade again - the DOS
  226. I need help to recognize these two vacuum tubes
  227. found a box...
  228. Advice on triode connecting a 'JZ6 tube
  229. Beard P100 pcb disassembly
  230. LM317 Heater 12ax7 ...not working
  231. 2A3 se amp power consumption
  232. "JJ" Tubes Vs other brands
  233. playing tube amps through a generator
  234. Need help with a preamp board I bought on eBay
  235. Question on Tube Rectifier..help please.
  236. 2A3 Hum Problems in SE (Please Help!)
  237. 240v to 110v for Sun Valley JB-300B
  238. Tubelab SPP Schematic
  239. SE output transformer
  240. single-ended.com annoyance
  241. A cheapo decent splitter
  242. Lightbulb Base Failure
  243. Madison Fielding Rcvr -- Filament Trick
  244. Converting from UL to Triode: Is this correct?
  245. white follower for driving mosfets.
  246. Distance between two audio input valves
  247. Series Caps on Power Supply
  248. Most expensive parts in DIY tube amp
  249. Filter Choke Selection
  250. 6072A as DAC outputstage

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