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  1. Grid Chokes
  2. Pot for project test
  3. Interpreting "Horizontal Osc. Service"
  4. My Take on a DIY Valve tester
  5. 6Н6П vs 6Н6П-И (gold grid etc claims ? )
  6. GU 19 VS GU 19-1 What's the difference ?
  7. please advice 1K Vdc power supply
  8. Has anyone used an opamp to split phase for a tube amp?
  9. Advice for budget valve amplifier
  10. S-5 Electronoics K-12M amplifier: lack of plate to grid coupling caps
  11. Eico ST70 needs a preamp output....
  12. Damper diode slow start
  13. KT150 SE based on Mikael's KT88 Schematic
  14. Octal driver tube choice
  15. Anyone ever clone a Audionote P1 SE
  16. Bogen DB212 phase-inverter
  17. EAR 869
  18. # triode 31 line pre amp
  19. Choosing The Iron For A SE OPT?
  20. Swap EL34 with 6L6 or 6V6
  21. Bridgeable floating output transformer help
  22. tapedeck playback amplifier
  23. Design based on the Output Transformer
  24. UL Push-Pull Tube Amp (mono combo)
  25. Power transformer for SET: toroid vs EI core
  26. can I use 12v to run 6C33C tubes???
  27. How to understand the data sheet for this 'universal' SE output transformer?
  28. DIY Stereo Amp
  29. el84 and 6aw8a
  30. Tube amp reboot Re: Chinese 6P6P (6V6) Push-Pull Tube Amplifier Kit
  31. 2A3 driver
  32. Tube Phono Preamps
  33. Newbie. Balanced 2A3 SE amplifier information
  34. Tube rectifier supply help
  35. cathode follower - please check my circuit
  36. Output tube stage 1578 for no DAC
  37. Bias for 300B
  38. Pots value in tube equalizer
  39. 'Real world' max plate voltages for 6DJ8, 6P15P?
  40. Lower load resistance for lower distortion (6L6 PP)
  41. Transformer Hum.
  42. Hmmmm Star ground
  43. Taylor T20 triode - anyone used these?
  44. Filament DC power supply for 2 valves
  45. Tubes availability
  46. Tube power amp bad fit for ML?
  47. SLA Battery (Filament Supply) DC Reference limits?
  48. Citation I, Citation II, and another Citation I
  49. tube amp damping / weird bass response, speaker movement
  50. Convert valve output stage to pre amp
  51. 6HJ5 SET
  52. A different type of EL84 SE
  53. Transformer covers; steel or aly?
  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. Can I mount Plate chokes next to OPTs???
  61. R-3389A Schematic?
  62. tube baxandall tone control potentiometer resistance value
  63. Can you help me identify these burned resistors?
  64. Do i have a problem with my DC filaments?
  65. Recommendations please. Octal sockets.
  66. metal can capacitors
  67. Dynaco Mark IV selenium rectifier replacement
  68. Elekit 8200 Tube rolling
  69. Girlfriend Wants to Build One
  70. Moskido Hybrid Aikido-MOSFET Amplifier
  71. Modified ST70 with extra tube sockets?!?!
  72. Wanted: ExpressPCB component layout for 7 pin socket
  73. Eliminating balance controls on Eico st70
  74. APPJ PA0901A anyone?
  75. 90wpc from push pull KT88?
  76. Help guessing amplifier model
  77. unusual SET amp design, your thoughts please
  78. Siemens e83cc Long plate triple mica?
  79. Help identafying 2 Output Transoromers?
  80. Tube Rectified Power Supplies
  81. Audio Nirvana 300B SET amp.
  82. Plotting plate curves past dissipation limit
  83. Massive Old Console... Repair or gut and replace with modern stuff?
  84. Tap Cap?
  85. OLD vs NEW tube amplifier circuits
  86. Who Made These Amps.
  87. An Amp oddity
  88. Linyun 300B Luxury edition
  89. Can plate chokes be THAT different?
  90. Pye HF25 Tube Monoblocks: Restoring Legends
  91. Millett Hybrid headphone amp.
  92. 6n2p-ev
  93. Idea for driver for CF output stage
  94. Problem with KT88 Williamson LTSpice simulation
  95. voltage regulator tubes
  96. Input impedance of grounded grid stage?
  97. tube upgrade benefits , worth the money ? 6R3S-1 , EF86
  98. Riaa MM high gain, low impedance.
  99. increase live 211 tube
  100. Need help with OPT for Loewe Opta Apollo Stereo
  101. Potentiometer & Power Switch Help
  102. Audio Note M2 Riaa.
  103. Is it the end of Blackburn Microtech tubes?
  104. Please critique my PSU design
  105. Audio Novice
  106. What vintage gear to source for tubes and transformers?
  107. 6n6p source
  108. (2) 6AV6 instead of 12ax7
  109. Preamp mod with tone control - comment please
  110. Roland branded 12AX7 tube?
  111. Questions about updates/upgrades
  112. When doubling output-tubes: What needs to be considered ?
  113. Audio Research SP-10 help needed
  114. Safety Tip For The Day
  115. PSU Output: Tubecad PS-1 Question
  116. Micro Channel Plate (MCP) audio amplifier
  117. bell mod 2445
  118. found a vintage dynacord concert el84 amp
  119. Stability problems, help please?
  120. Do I NEED to bring up an old amp on veriac?
  121. 6P15 / EL84 Sort of Para-Feed, Cathode-Drive, Hybrid
  122. Crosstalk L-R. Acceptable levels?
  123. Yaqin MS MC - 30L Amp
  124. www.pimmlabs.com not available
  125. vibration resistant preamp tube
  126. Direct Heated Valve in Series - Channel Separation Question
  127. So i was going into Tosche Station to pick up some power converters . . .
  128. a sub crossover idea
  129. Understanding power supply
  130. 12AX7 Class 2 (Positive Grid Voltage) Operation
  131. All triode 250 watt western electric
  132. Telefunken EL34 data sheet
  133. Using a 6J1 tube amp as a final stage?
  134. Anyone use 872-A Mercury Vapor Rectifier Tube
  135. Need recapping tube radio advice
  136. Thinking about getting Philco model 14
  137. Mixed Bias for an EL34 ? Any recommendations / experience ?
  138. PP oscillation with toroid output transformer
  139. 6B4G New Amp Build Issue
  140. Mable Audio 300B Amp KitI
  141. Help me understand - 7061 vs. 12ab5 (and the rest of the 6V6 family)
  142. ebay seller jellyfishaudio
  143. 866a rectifier on 6.3vct@10A
  144. Vintage tube preamp design
  145. Output Transformer Wiring
  146. Ground loop problems
  147. Reversed preamp OPT as IPT
  148. A2 p-p with Millett driver
  149. DC filament supply schematic
  150. Mystery tube
  151. 6eu7/6bq5 feedback question
  152. Ultimate Ultralinear Amp...please help to understand...
  153. Mullard 20 Watt Amp
  154. Transformer feedback winding: Tamura HN-1
  155. the big one
  156. ECC33 vs 6SN7 - Implications I should know?
  157. What is a Source Measure unit (SMU)?
  158. Building a tube amp from scratch
  159. Priboj (priboi) 50, small problem (SOVIET TUBE AMP)
  160. Kellogg (Dukane?) Tube PA Amp
  161. APPJ PA1501
  162. New production 6L6GC tubes and similar
  163. Knight 10W 6V6 push-pull tube power amp
  164. 480vct at 50VA for less than $12 shipped
  165. Pioneer SA-81 integrated tube amp
  166. 12B4 Preamp Design/Pre-build Questions
  167. Can I mount a 5R4WGA at a 10 degree angle?
  168. plate current variation with fixed bias
  169. 5693 issue
  170. Hum SOLVED!!!!
  171. Garage System Control/Preamp idea
  172. Aikido Octal line stage kit info needed
  173. Phonola suitcase player...now, with hum!
  174. My latests (well ... first) RIAA preamp
  175. 12at7 one side drawers 10% more current
  176. Upgrade output transfomers, EL34 single-ended
  177. cleaning tubes / valves
  178. a simple (I think) Baxandall question
  179. Paoli Model 60M help
  180. Should something be done about these traces?
  181. 300(may)B(e) - Recs & Advice
  182. LNF in gain stage or CF?
  183. KT77 at 790 V
  184. Newb question about tube socket placement
  185. my first tube amp project
  186. Unusual Schematic help
  187. 12AX7 vs 12AT7 vs 12AU7
  188. 6SN7 Distortion Canceling in Amp
  189. D-115 w/ weak channel
  190. MOSFET Follower Choices
  191. Sanity check my unlabeled transformer guesstimates? Fisher X-200 power trafo
  192. Mystery Tube Time
  193. PSU simulation help
  194. Vacuum tubes and wire wrap
  195. LTP phase splitter as output stage?
  196. Swap 6B4G for 6SL7 SRPP ?
  197. Need Fuse Values for 6922 Tube Premp, 6.3v & B+ Fuse Value
  198. 12AX7 tone control with low B+ voltage
  199. Cathodefollower and strange behaviour with lowering of anode voltage.
  200. Early Audio Research Dual 100 Schematic?
  201. current drive
  202. Bench Supply
  203. 6X5 GT Hybrid rectifier
  204. small shrouded PP OPT choices ?
  205. Single triode instead of double triode?
  206. Low noise valve tube circuit ideas for cassette deck
  207. Found a box of various 9 pin tubes....
  208. 12AU7 internally matched triodes
  209. Homemade tube socket adaptor
  210. Who's mark was on this obvious 6n23p?
  211. Thoughts on amp mods
  212. Just a quick thanks to you guys
  213. Low voltage tube line preamp
  214. What the difference between 6H7C & 6H8C tubes
  215. Headphone amp OTL
  216. Recommend design for low cost DIY valve amp
  217. need help with short
  218. Simple 1-device gyrators
  219. Need assist - Melos 110 Preamp
  220. Bad capacitor?
  221. Does someone has info about this tubes ?
  222. 2c26a
  223. Help identifying vintage tube amp connector
  224. What make is this E88CC ?
  225. Valve amp - vanishing bass
  226. 5Z3P 6N9P EL34B SE amplifier
  227. Wrapping my head around cathode followers. Does this explanation make sense?
  228. HK A500 rebuild
  229. LS7B Marantz 7 Clone PreAmp
  230. SS to drive 300b
  231. is the 12ax7 ever used on television sets?
  232. What topology was this old RCA power transformer designed for?
  233. BOM of Audio Research SP-11 MkII and D-115 MkII
  234. ECC88/6DJ8 at higher Va
  235. Valve headphone amp humming through headphones
  236. Merlin's new hi-fi valve preamp book is released
  237. Screen Drive 6BQ6GT Amp - Feasibility Study
  238. Harmon Kardon A50K project
  239. Reading high V through resistor/cap casings
  240. Troubleshooting magnavox 9302-00
  241. Vintage 1990's Audio Note 2k5 output transformer wiring color code
  242. Splitting the audio band into two transformers
  243. 21LG6/A P-P for 50+ watts?
  244. Anyone use an IEC line filter plug??
  245. pre Line 2 end Line 3
  246. NEW D3a equivalent on marked?
  247. Anyone tried Plitron transformers?
  248. Summing channels;Why? JE EL34
  249. TAJ's Harman Kardon Citation V rebuild thread
  250. Screened/shielded cables in chassis

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