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  1. Dynaco Mark IV selenium rectifier replacement
  2. Elekit 8200 Tube rolling
  3. Girlfriend Wants to Build One
  4. Moskido Hybrid Aikido-MOSFET Amplifier
  5. Modified ST70 with extra tube sockets?!?!
  6. Wanted: ExpressPCB component layout for 7 pin socket
  7. Eliminating balance controls on Eico st70
  8. APPJ PA0901A anyone?
  9. 90wpc from push pull KT88?
  10. Help guessing amplifier model
  11. unusual SET amp design, your thoughts please
  12. Siemens e83cc Long plate triple mica?
  13. Help identafying 2 Output Transoromers?
  14. Tube Rectified Power Supplies
  15. Audio Nirvana 300B SET amp.
  16. Plotting plate curves past dissipation limit
  17. Massive Old Console... Repair or gut and replace with modern stuff?
  18. Tap Cap?
  19. OLD vs NEW tube amplifier circuits
  20. Who Made These Amps.
  21. An Amp oddity
  22. Linyun 300B Luxury edition
  23. Can plate chokes be THAT different?
  24. Pye HF25 Tube Monoblocks: Restoring Legends
  25. Millett Hybrid headphone amp.
  26. 6n2p-ev
  27. Idea for driver for CF output stage
  28. Problem with KT88 Williamson LTSpice simulation
  29. voltage regulator tubes
  30. Input impedance of grounded grid stage?
  31. tube upgrade benefits , worth the money ? 6R3S-1 , EF86
  32. Riaa MM high gain, low impedance.
  33. increase live 211 tube
  34. Need help with OPT for Loewe Opta Apollo Stereo
  35. Potentiometer & Power Switch Help
  36. Audio Note M2 Riaa.
  37. Is it the end of Blackburn Microtech tubes?
  38. Please critique my PSU design
  39. Audio Novice
  40. What vintage gear to source for tubes and transformers?
  41. 6n6p source
  42. (2) 6AV6 instead of 12ax7
  43. Preamp mod with tone control - comment please
  44. Roland branded 12AX7 tube?
  45. Questions about updates/upgrades
  46. When doubling output-tubes: What needs to be considered ?
  47. Audio Research SP-10 help needed
  48. Safety Tip For The Day
  49. PSU Output: Tubecad PS-1 Question
  50. Micro Channel Plate (MCP) audio amplifier
  51. bell mod 2445
  52. found a vintage dynacord concert el84 amp
  53. Stability problems, help please?
  54. Do I NEED to bring up an old amp on veriac?
  55. 6P15 / EL84 Sort of Para-Feed, Cathode-Drive, Hybrid
  56. Crosstalk L-R. Acceptable levels?
  57. Yaqin MS MC - 30L Amp
  58. www.pimmlabs.com not available
  59. vibration resistant preamp tube
  60. Direct Heated Valve in Series - Channel Separation Question
  61. So i was going into Tosche Station to pick up some power converters . . .
  62. a sub crossover idea
  63. Understanding power supply
  64. 12AX7 Class 2 (Positive Grid Voltage) Operation
  65. All triode 250 watt western electric
  66. Telefunken EL34 data sheet
  67. Using a 6J1 tube amp as a final stage?
  68. Anyone use 872-A Mercury Vapor Rectifier Tube
  69. Need recapping tube radio advice
  70. Thinking about getting Philco model 14
  71. Mixed Bias for an EL34 ? Any recommendations / experience ?
  72. PP oscillation with toroid output transformer
  73. 6B4G New Amp Build Issue
  74. Mable Audio 300B Amp KitI
  75. Help me understand - 7061 vs. 12ab5 (and the rest of the 6V6 family)
  76. ebay seller jellyfishaudio
  77. 866a rectifier on 6.3vct@10A
  78. Vintage tube preamp design
  79. Output Transformer Wiring
  80. Ground loop problems
  81. Reversed preamp OPT as IPT
  82. A2 p-p with Millett driver
  83. DC filament supply schematic
  84. Mystery tube
  85. 6eu7/6bq5 feedback question
  86. Ultimate Ultralinear Amp...please help to understand...
  87. Mullard 20 Watt Amp
  88. Transformer feedback winding: Tamura HN-1
  89. the big one
  90. ECC33 vs 6SN7 - Implications I should know?
  91. What is a Source Measure unit (SMU)?
  92. Building a tube amp from scratch
  93. Priboj (priboi) 50, small problem (SOVIET TUBE AMP)
  94. Kellogg (Dukane?) Tube PA Amp
  95. APPJ PA1501
  96. New production 6L6GC tubes and similar
  97. Knight 10W 6V6 push-pull tube power amp
  98. 480vct at 50VA for less than $12 shipped
  99. Pioneer SA-81 integrated tube amp
  100. 12B4 Preamp Design/Pre-build Questions
  101. Can I mount a 5R4WGA at a 10 degree angle?
  102. plate current variation with fixed bias
  103. 5693 issue
  104. Hum SOLVED!!!!
  105. Garage System Control/Preamp idea
  106. Aikido Octal line stage kit info needed
  107. Phonola suitcase player...now, with hum!
  108. My latests (well ... first) RIAA preamp
  109. 12at7 one side drawers 10% more current
  110. Upgrade output transfomers, EL34 single-ended
  111. cleaning tubes / valves
  112. a simple (I think) Baxandall question
  113. Paoli Model 60M help
  114. Should something be done about these traces?
  115. 300(may)B(e) - Recs & Advice
  116. LNF in gain stage or CF?
  117. KT77 at 790 V
  118. Newb question about tube socket placement
  119. my first tube amp project
  120. Unusual Schematic help
  121. 12AX7 vs 12AT7 vs 12AU7
  122. 6SN7 Distortion Canceling in Amp
  123. D-115 w/ weak channel
  124. MOSFET Follower Choices
  125. Sanity check my unlabeled transformer guesstimates? Fisher X-200 power trafo
  126. Mystery Tube Time
  127. PSU simulation help
  128. Vacuum tubes and wire wrap
  129. LTP phase splitter as output stage?
  130. Swap 6B4G for 6SL7 SRPP ?
  131. Need Fuse Values for 6922 Tube Premp, 6.3v & B+ Fuse Value
  132. 12AX7 tone control with low B+ voltage
  133. Cathodefollower and strange behaviour with lowering of anode voltage.
  134. Early Audio Research Dual 100 Schematic?
  135. current drive
  136. Bench Supply
  137. 6X5 GT Hybrid rectifier
  138. small shrouded PP OPT choices ?
  139. Single triode instead of double triode?
  140. Low noise valve tube circuit ideas for cassette deck
  141. Found a box of various 9 pin tubes....
  142. 12AU7 internally matched triodes
  143. Homemade tube socket adaptor
  144. Who's mark was on this obvious 6n23p?
  145. Thoughts on amp mods
  146. Just a quick thanks to you guys
  147. Low voltage tube line preamp
  148. What the difference between 6H7C & 6H8C tubes
  149. Headphone amp OTL
  150. Recommend design for low cost DIY valve amp
  151. need help with short
  152. Simple 1-device gyrators
  153. Need assist - Melos 110 Preamp
  154. Bad capacitor?
  155. Does someone has info about this tubes ?
  156. 2c26a
  157. Help identifying vintage tube amp connector
  158. What make is this E88CC ?
  159. Valve amp - vanishing bass
  160. 5Z3P 6N9P EL34B SE amplifier
  161. Wrapping my head around cathode followers. Does this explanation make sense?
  162. HK A500 rebuild
  163. LS7B Marantz 7 Clone PreAmp
  164. SS to drive 300b
  165. is the 12ax7 ever used on television sets?
  166. What topology was this old RCA power transformer designed for?
  167. BOM of Audio Research SP-11 MkII and D-115 MkII
  168. ECC88/6DJ8 at higher Va
  169. Valve headphone amp humming through headphones
  170. Merlin's new hi-fi valve preamp book is released
  171. Screen Drive 6BQ6GT Amp - Feasibility Study
  172. Harmon Kardon A50K project
  173. Reading high V through resistor/cap casings
  174. Troubleshooting magnavox 9302-00
  175. Vintage 1990's Audio Note 2k5 output transformer wiring color code
  176. Splitting the audio band into two transformers
  177. 21LG6/A P-P for 50+ watts?
  178. Anyone use an IEC line filter plug??
  179. pre Line 2 end Line 3
  180. NEW D3a equivalent on marked?
  181. Anyone tried Plitron transformers?
  182. Summing channels;Why? JE EL34
  183. TAJ's Harman Kardon Citation V rebuild thread
  184. Screened/shielded cables in chassis
  185. Cascode question re shunt to lower tube
  186. LED biasing in preamp - cap in parallel required?
  187. Can you identify these tube amplifiers? 4x807 & mercury vapor rectifiers
  188. Amperex BB ECC82 - Real or Fake?
  189. Max screen grid voltages in datasheets
  190. Tube rectifiers
  191. VT-25/10Y tubes
  192. Does anyone have the schematic for Transcendant Sound Mini Beast?
  193. Schematic help please
  194. Faulty rectifier valve possibly damaged my amplifier - help
  195. 6J1 tube buffer circuit diagram
  196. Filament transformer question
  197. Grundig 9060 output transformer identifying
  198. 6J1 biasing inconsistencies with datasheet
  199. Separate transformer for heaters. How to reference this to ground?
  200. 300B alternatives
  201. Stereo to Mono transformer based 'hybrid/bridging mixer'
  202. LK-48 over voltage
  203. Aikido all in one
  204. Bitsa Amp project
  205. Search for thread/article about phono preamp design
  206. Fusing valve amps
  207. AIKIDO line stage
  208. Cossor 61SPT - any experience?
  209. 6BG6GA PP, -bias, Amp built but couple problems
  210. GE 6sn7 made in Italy
  211. First SE Amp Build
  212. HV soft start
  213. Setup Question (do I really need the gain from a preamp)
  214. Your opinions please
  215. design advise
  216. Interpolation Oscillator
  217. audio note oto
  218. A small resonant HV converter: Q-Conv
  219. Iv got a 100w OPT That needs a circuit
  220. Powerful tube amp / unmatched tubes in parallel
  221. Need help: I have 807s and the guts from a HK AA-100
  222. SE EL34 and speakers
  223. 6AK10 LTP with CCS question
  224. Is a heater voltage of 6.7 cause for concern?
  225. Tube guards/cage for Elekit TU-8200
  226. ming da mc 845 aa modification
  227. How good can this headphone amp/pre amp be?
  228. Zero Bias Solution?
  229. Cathode Degeneration with CCS plate load- My Mistake
  230. Pilot 240 with too much bass-- circuit modification needed?
  231. EL34 DIY "centre-tapped" tube ??
  232. Advice for Super Cheap & Simple 829b based amp from spare parts
  233. Infineon IPA50R140CP N-channel mosfet
  234. Borberly Op amp 4 Tube Mosfet hybrid
  235. Splitting Power Supply Choke Question
  236. Toroidal PT as OPT in big power application?
  237. Inrush limiter question
  238. Counterpoint AS-5.1 Tube Type Question
  239. OPT connections
  240. Help teach a CS guy to test a tube amp!
  241. Now THIS is an output transformer
  242. Gas rectifier vs vacuum rectifier
  243. What value for the bias resistor of a SE 6550?
  244. ELL80 tube-Ultralinear mode???
  245. Russian "6L6" ID
  246. Tube amp for a car lol
  247. S5 Electronics Upgrade
  248. Best Tube for SPUD Amp
  249. Zenith 7b31 EL84 Tube Amp Low Volume
  250. Heater cathode elevation

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