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  1. 6Н6П vs 6Н6П-И (gold grid etc claims ? )
  2. GU 19 VS GU 19-1 What's the difference ?
  3. please advice 1K Vdc power supply
  4. Has anyone used an opamp to split phase for a tube amp?
  5. Advice for budget valve amplifier
  6. S-5 Electronoics K-12M amplifier: lack of plate to grid coupling caps
  7. Eico ST70 needs a preamp output....
  8. Damper diode slow start
  9. KT150 SE based on Mikael's KT88 Schematic
  10. Octal driver tube choice
  11. Anyone ever clone a Audionote P1 SE
  12. Bogen DB212 phase-inverter
  13. EAR 869
  14. # triode 31 line pre amp
  15. Choosing The Iron For A SE OPT?
  16. Swap EL34 with 6L6 or 6V6
  17. Bridgeable floating output transformer help
  18. tapedeck playback amplifier
  19. Design based on the Output Transformer
  20. UL Push-Pull Tube Amp (mono combo)
  21. Power transformer for SET: toroid vs EI core
  22. Tektronix 547 Oscilloscope reserection
  23. can I use 12v to run 6C33C tubes???
  24. How to understand the data sheet for this 'universal' SE output transformer?
  25. DIY Stereo Amp
  26. el84 and 6aw8a
  27. Tube amp reboot Re: Chinese 6P6P (6V6) Push-Pull Tube Amplifier Kit
  28. 2A3 driver
  29. Tube Phono Preamps
  30. Newbie. Balanced 2A3 SE amplifier information
  31. Tube rectifier supply help
  32. cathode follower - please check my circuit
  33. Output tube stage 1578 for no DAC
  34. Bias for 300B
  35. Pots value in tube equalizer
  36. 'Real world' max plate voltages for 6DJ8, 6P15P?
  37. Lower load resistance for lower distortion (6L6 PP)
  38. Transformer Hum.
  39. Hmmmm Star ground
  40. Updating a HeathKit IT-11 capacitor checker
  41. Taylor T20 triode - anyone used these?
  42. Filament DC power supply for 2 valves
  43. Tubes availability
  44. Tube power amp bad fit for ML?
  45. SLA Battery (Filament Supply) DC Reference limits?
  46. Citation I, Citation II, and another Citation I
  47. tube amp damping / weird bass response, speaker movement
  48. Convert valve output stage to pre amp
  49. 6HJ5 SET
  50. A different type of EL84 SE
  51. Transformer covers; steel or aly?
  52. Triplett 3444A tube chart
  53. polyester or polypropylene or other??
  54. Opinions on SET transformers for 307a amp
  55. Strange experience with Dynaco ST70 input tubes
  56. Need advice regarding SET 45 Amplifier
  57. "Low" B+ Voltage Amplifiers
  58. Small power all russian tubes single ended amp
  59. Noob question on triode
  60. Good capacitors for tight space
  61. Can I mount Plate chokes next to OPTs???
  62. R-3389A Schematic?
  63. tube baxandall tone control potentiometer resistance value
  64. Can you help me identify these burned resistors?
  65. Do i have a problem with my DC filaments?
  66. Recommendations please. Octal sockets.
  67. metal can capacitors
  68. Dynaco Mark IV selenium rectifier replacement
  69. Elekit 8200 Tube rolling
  70. Girlfriend Wants to Build One
  71. Moskido Hybrid Aikido-MOSFET Amplifier
  72. Modified ST70 with extra tube sockets?!?!
  73. Wanted: ExpressPCB component layout for 7 pin socket
  74. Eliminating balance controls on Eico st70
  75. APPJ PA0901A anyone?
  76. 90wpc from push pull KT88?
  77. Help guessing amplifier model
  78. unusual SET amp design, your thoughts please
  79. Siemens e83cc Long plate triple mica?
  80. Help identafying 2 Output Transoromers?
  81. Tube Rectified Power Supplies
  82. Audio Nirvana 300B SET amp.
  83. Plotting plate curves past dissipation limit
  84. Massive Old Console... Repair or gut and replace with modern stuff?
  85. Tap Cap?
  86. OLD vs NEW tube amplifier circuits
  87. Who Made These Amps.
  88. An Amp oddity
  89. Linyun 300B Luxury edition
  90. Can plate chokes be THAT different?
  91. Pye HF25 Tube Monoblocks: Restoring Legends
  92. Millett Hybrid headphone amp.
  93. 6n2p-ev
  94. Idea for driver for CF output stage
  95. Problem with KT88 Williamson LTSpice simulation
  96. voltage regulator tubes
  97. Input impedance of grounded grid stage?
  98. tube upgrade benefits , worth the money ? 6R3S-1 , EF86
  99. Riaa MM high gain, low impedance.
  100. increase live 211 tube
  101. Need help with OPT for Loewe Opta Apollo Stereo
  102. Potentiometer & Power Switch Help
  103. Audio Note M2 Riaa.
  104. Is it the end of Blackburn Microtech tubes?
  105. Please critique my PSU design
  106. Audio Novice
  107. What vintage gear to source for tubes and transformers?
  108. 6n6p source
  109. (2) 6AV6 instead of 12ax7
  110. Preamp mod with tone control - comment please
  111. Roland branded 12AX7 tube?
  112. Questions about updates/upgrades
  113. When doubling output-tubes: What needs to be considered ?
  114. Audio Research SP-10 help needed
  115. Safety Tip For The Day
  116. PSU Output: Tubecad PS-1 Question
  117. Micro Channel Plate (MCP) audio amplifier
  118. bell mod 2445
  119. found a vintage dynacord concert el84 amp
  120. Stability problems, help please?
  121. Do I NEED to bring up an old amp on veriac?
  122. 6P15 / EL84 Sort of Para-Feed, Cathode-Drive, Hybrid
  123. Crosstalk L-R. Acceptable levels?
  124. Electronic diagramming tools with power and output transformer symbols
  125. Yaqin MS MC - 30L Amp
  126. www.pimmlabs.com not available
  127. vibration resistant preamp tube
  128. Direct Heated Valve in Series - Channel Separation Question
  129. So i was going into Tosche Station to pick up some power converters . . .
  130. a sub crossover idea
  131. Understanding power supply
  132. 12AX7 Class 2 (Positive Grid Voltage) Operation
  133. Edcor transformers TubeLab SPP
  134. All triode 250 watt western electric
  135. Telefunken EL34 data sheet
  136. Using a 6J1 tube amp as a final stage?
  137. Anyone use 872-A Mercury Vapor Rectifier Tube
  138. Need recapping tube radio advice
  139. Russian Capacitors
  140. Thinking about getting Philco model 14
  141. Mixed Bias for an EL34 ? Any recommendations / experience ?
  142. PP oscillation with toroid output transformer
  143. 6B4G New Amp Build Issue
  144. Mable Audio 300B Amp KitI
  145. Help me understand - 7061 vs. 12ab5 (and the rest of the 6V6 family)
  146. ebay seller jellyfishaudio
  147. DIY Tubelab SSE build keeps blowing fuses when turned on.
  148. 866a rectifier on 6.3vct@10A
  149. Vintage tube preamp design
  150. Output Transformer Wiring
  151. Ground loop problems
  152. Reversed preamp OPT as IPT
  153. A2 p-p with Millett driver
  154. DC filament supply schematic
  155. Mystery tube
  156. 6eu7/6bq5 feedback question
  157. Ultimate Ultralinear Amp...please help to understand...
  158. Mullard 20 Watt Amp
  159. Transformer feedback winding: Tamura HN-1
  160. the big one
  161. ECC33 vs 6SN7 - Implications I should know?
  162. What is a Source Measure unit (SMU)?
  163. Building a tube amp from scratch
  164. Priboj (priboi) 50, small problem (SOVIET TUBE AMP)
  165. Kellogg (Dukane?) Tube PA Amp
  166. APPJ PA1501
  167. New production 6L6GC tubes and similar
  168. Knight 10W 6V6 push-pull tube power amp
  169. 480vct at 50VA for less than $12 shipped
  170. Pioneer SA-81 integrated tube amp
  171. 12B4 Preamp Design/Pre-build Questions
  172. Can I mount a 5R4WGA at a 10 degree angle?
  173. plate current variation with fixed bias
  174. 5693 issue
  175. SPP amp build from TubeLab
  176. "mustard" Philips Mullard capacitors
  177. Hum SOLVED!!!!
  178. Garage System Control/Preamp idea
  179. Aikido Octal line stage kit info needed
  180. Phonola suitcase player...now, with hum!
  181. My latests (well ... first) RIAA preamp
  182. 12at7 one side drawers 10% more current
  183. Upgrade output transfomers, EL34 single-ended
  184. cleaning tubes / valves
  185. a simple (I think) Baxandall question
  186. Paoli Model 60M help
  187. Audio Noise Tube Tester
  188. Should something be done about these traces?
  189. 300(may)B(e) - Recs & Advice
  190. LNF in gain stage or CF?
  191. KT77 at 790 V
  192. Newb question about tube socket placement
  193. my first tube amp project
  194. Fun With Measurements
  195. Unusual Schematic help
  196. 12AX7 vs 12AT7 vs 12AU7
  197. 6SN7 Distortion Canceling in Amp
  198. D-115 w/ weak channel
  199. MOSFET Follower Choices
  200. Sanity check my unlabeled transformer guesstimates? Fisher X-200 power trafo
  201. Mystery Tube Time
  202. PSU simulation help
  203. Vacuum tubes and wire wrap
  204. LTP phase splitter as output stage?
  205. Swap 6B4G for 6SL7 SRPP ?
  206. Jean Hiraga or Tubelab SSE for KT88 SET
  207. Need Fuse Values for 6922 Tube Premp, 6.3v & B+ Fuse Value
  208. 12AX7 tone control with low B+ voltage
  209. Cathodefollower and strange behaviour with lowering of anode voltage.
  210. Early Audio Research Dual 100 Schematic?
  211. current drive
  212. Bench Supply
  213. 6X5 GT Hybrid rectifier
  214. 8417 tube test on Hickok 539a
  215. small shrouded PP OPT choices ?
  216. Single triode instead of double triode?
  217. Low noise valve tube circuit ideas for cassette deck
  218. Found a box of various 9 pin tubes....
  219. 12AU7 internally matched triodes
  220. Homemade tube socket adaptor
  221. Who's mark was on this obvious 6n23p?
  222. Thoughts on amp mods
  223. Just a quick thanks to you guys
  224. Low voltage tube line preamp
  225. What the difference between 6H7C & 6H8C tubes
  226. Headphone amp OTL
  227. Recommend design for low cost DIY valve amp
  228. need help with short
  229. Simple 1-device gyrators
  230. Need assist - Melos 110 Preamp
  231. Bad capacitor?
  232. Does someone has info about this tubes ?
  233. 2c26a
  234. Help identifying vintage tube amp connector
  235. What make is this E88CC ?
  236. Valve amp - vanishing bass
  237. 5Z3P 6N9P EL34B SE amplifier
  238. Wrapping my head around cathode followers. Does this explanation make sense?
  239. HK A500 rebuild
  240. LS7B Marantz 7 Clone PreAmp
  241. SS to drive 300b
  242. is the 12ax7 ever used on television sets?
  243. What topology was this old RCA power transformer designed for?
  244. BOM of Audio Research SP-11 MkII and D-115 MkII
  245. ECC88/6DJ8 at higher Va
  246. Valve headphone amp humming through headphones
  247. Merlin's new hi-fi valve preamp book is released
  248. Screen Drive 6BQ6GT Amp - Feasibility Study
  249. Harmon Kardon A50K project
  250. Reading high V through resistor/cap casings

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