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  1. loudspeaker series resistance question
  2. Pop when power on
  3. Which preamp a better match for low-volume listening?
  4. Balanced Signal, Phase Splitter in Push Pull topology
  5. Pin 4 Grid 2 Resistor
  6. Weird voltage w/ LM1084 regulators / #27 filaments
  7. My Audio Research SP-3-A1 Restoration and Questions Documentation
  8. Almarro a318B
  9. Bakelite and Car Brakefluid
  10. Chinese 6N2 / 6P1 schematics advice needed
  11. Operating point of GM70
  12. 50W 6L6 (6P7S) how to replace tube ccs for solid state?
  13. Star Grounding for a Line Stage Tube Preamp
  14. ID Kit Amp Help. K-12 Tube Amp or Similar?
  15. Are they still making Golden Dragon?
  16. About LL1660/18mA
  17. ST-120 tube set
  18. Newb seeks to drive DVC 4+4 ohm 500w RMS subwoofer with tubes.
  19. The 33 Amplifier
  20. Build Your Own Vacuum Tubes
  21. Can Anyone Tell Me What This Pot Does in AN Soro?
  22. Which high-voltage MOSFET for source follower?
  23. Stacked Power Supply
  24. A Practical Circlotron You Can Build
  25. Noob questions
  26. JohnBlue TL66 Monoblocks hum problem. Help please
  27. ECL82 SE 1,8W
  28. RH slayer
  29. Cary SLP-90 preamp power supply
  30. phase splitter with low distortion
  31. First PSU Capacitor
  32. Transformer locations
  33. Chinese tubes
  34. ez81 power supply
  35. SE class A2
  36. Dynaco MKIV 7199 driver circuit
  37. Be Cautious with Obbligato Film Caps
  38. Someone out there....type of tube ?
  39. admiral 5t4a
  40. Pentode Screen Resistance (rs) Estimation Example
  41. Grounding linstage help
  42. What is this tube?
  43. Do 300b tube have a "guide pin"
  44. Effect of Weak Mains Power
  45. Croatian Triode Festival Zadar-2016
  46. Using dht self bias resistor to lift idht front end heater
  47. Philips EL6411/01 amplifier
  48. Quad II output transformer
  49. Mosfet or other semiconductor substitute for cathodyne?
  50. 6SN7 preamp tube alternative with less gain?
  51. Hagerman Cornet Octal planning help and build
  52. output transformer opposing windings/ please explain
  53. Preamp Transformer overheats
  54. Finishing ASC capacitors
  55. Can't identify this tube?
  56. 6SN7 pin 4 signal input
  57. Help - Tube PSU Design
  58. Little help for a newbie?
  59. Has anyone built this phono stage you can buy on ebay as a circuit board.
  60. pl504 Vacuum tube
  61. Tubes in the Unballancer
  62. Quad II Amplifier KT66 Valves/Tubes and Carbon Composition Resistors
  63. ecc88 preamp
  64. Tube socket center post
  65. Troubleshooting bias of old diy amp with Acrosound TO-300 transformer
  66. Dynaco Mark III with noisy transformer, making hum.
  67. Power amplifier EL 34
  68. Replace 6SN7 to E88CC on HP amp 90VDC plate capable?
  69. 1p24b Russian tube
  70. Tube power supply
  71. Tube-O-Philes, Please help with this chassis search
  72. WOW, I want one !!!
  73. B&K dyna-quick 550
  74. What is this? Valve Amp?
  75. CCS instead of a resistor in the cathode of a cathode follower?
  76. Please comment on D3a tube testing
  77. ID tube amp kit 8 watts stereo.. unsure what tubes to use
  78. Mixed bias for 6336a or 6AS7 output tubes?
  79. Vintage Tube Amp kit - Can it be refurbished?
  80. Any experience or opinions about this 300B Chinese DIY Kit ...
  81. Measuring "high impedance voltage" with digital multimeter
  82. SE (UL ?) HI FI project needs help
  83. Can anyone verify this math? MC 2205 Watt Scale
  84. Generic design question for Pentode CCS
  85. Using big power tubes as buffer?
  86. Reason for tube converter
  87. Valve Mosfet Hybrids: a solution
  88. Protecting Plitron OPT
  89. DHT line stage 26, 01a or 101d
  90. Tube manufacturers
  91. Pinnacle Datasheets
  92. Tube preamp
  93. Can I use 1.1 instead of .47
  94. Project: Add a DAC to Pete Millett's low voltage hybrid tube amp
  95. Speakers for S5 K-16LS Kit
  96. Inexpensive B+ Batteries
  97. Leak Stereo 20 Capacitor Replacement Question
  98. Dynaco Mark IV exploding bias filter capacitor
  99. Anyone familiar with the Raphaelite sinovt 2a3-845
  100. Building monoblocks, go Dynaco MKIII or.....?
  101. Priboi (Surf :d) output transformer possible problem
  102. replacing ECC83 with ECC82 in stereo amp
  103. Counterpoint SA-5000 FET Buffer
  104. C3M 300B SET build, input appreciated.
  105. K12G Quiet Channel
  106. Weird "holes" in getter
  107. Radiotron A530 6J7G-6V6G-2A3 PP Amp
  108. Tube Identification
  109. Can i sub a 50K for a 100K volume control?
  110. Are the 12B4 and 12b4A interchangable?
  111. SE or PSE amplifier with 6N6P driving the 300B tube
  112. About 300B SE heater w/t Coleman regulator
  113. I just picked up this incredible bench top meter that measures everything.
  114. Should my TVC x formers be input or output
  115. Preamp Chassis Layout Advice
  116. Russian Audio Tubes
  117. SE UL EL 300 / ECC 83
  118. Grid Chokes
  119. Pot for project test
  120. Interpreting "Horizontal Osc. Service"
  121. My Take on a DIY Valve tester
  122. 6Н6П vs 6Н6П-И (gold grid etc claims ? )
  123. GU 19 VS GU 19-1 What's the difference ?
  124. please advice 1K Vdc power supply
  125. Has anyone used an opamp to split phase for a tube amp?
  126. Advice for budget valve amplifier
  127. S-5 Electronoics K-12M amplifier: lack of plate to grid coupling caps
  128. Eico ST70 needs a preamp output....
  129. Damper diode slow start
  130. KT150 SE based on Mikael's KT88 Schematic
  131. Oil filled capacitor
  132. Octal driver tube choice
  133. Anyone ever clone a Audionote P1 SE
  134. Bogen DB212 phase-inverter
  135. EAR 869
  136. # triode 31 line pre amp
  137. Choosing The Iron For A SE OPT?
  138. Swap EL34 with 6L6 or 6V6
  139. Bridgeable floating output transformer help
  140. tapedeck playback amplifier
  141. Design based on the Output Transformer
  142. UL Push-Pull Tube Amp (mono combo)
  143. Power transformer for SET: toroid vs EI core
  144. Tektronix 547 Oscilloscope reserection
  145. can I use 12v to run 6C33C tubes???
  146. How to understand the data sheet for this 'universal' SE output transformer?
  147. DIY Stereo Amp
  148. el84 and 6aw8a
  149. Tube amp reboot Re: Chinese 6P6P (6V6) Push-Pull Tube Amplifier Kit
  150. 2A3 driver
  151. Tube Phono Preamps
  152. Newbie. Balanced 2A3 SE amplifier information
  153. Tube rectifier supply help
  154. cathode follower - please check my circuit
  155. Output tube stage 1578 for no DAC
  156. Bias for 300B
  157. Pots value in tube equalizer
  158. 'Real world' max plate voltages for 6DJ8, 6P15P?
  159. Lower load resistance for lower distortion (6L6 PP)
  160. Transformer Hum.
  161. Hmmmm Star ground
  162. Updating a HeathKit IT-11 capacitor checker
  163. Taylor T20 triode - anyone used these?
  164. Filament DC power supply for 2 valves
  165. Tubes availability
  166. Tube power amp bad fit for ML?
  167. SLA Battery (Filament Supply) DC Reference limits?
  168. Citation I, Citation II, and another Citation I
  169. tube amp damping / weird bass response, speaker movement
  170. Convert valve output stage to pre amp
  171. 6HJ5 SET
  172. A different type of EL84 SE
  173. Transformer covers; steel or aly?
  174. Triplett 3444A tube chart
  175. polyester or polypropylene or other??
  176. Opinions on SET transformers for 307a amp
  177. Strange experience with Dynaco ST70 input tubes
  178. Need advice regarding SET 45 Amplifier
  179. "Low" B+ Voltage Amplifiers
  180. Small power all russian tubes single ended amp
  181. Noob question on triode
  182. Good capacitors for tight space
  183. Can I mount Plate chokes next to OPTs???
  184. R-3389A Schematic?
  185. tube baxandall tone control potentiometer resistance value
  186. Can you help me identify these burned resistors?
  187. Do i have a problem with my DC filaments?
  188. Recommendations please. Octal sockets.
  189. metal can capacitors
  190. Dynaco Mark IV selenium rectifier replacement
  191. Elekit 8200 Tube rolling
  192. Girlfriend Wants to Build One
  193. Moskido Hybrid Aikido-MOSFET Amplifier
  194. Modified ST70 with extra tube sockets?!?!
  195. Wanted: ExpressPCB component layout for 7 pin socket
  196. Eliminating balance controls on Eico st70
  197. APPJ PA0901A anyone?
  198. 90wpc from push pull KT88?
  199. Help guessing amplifier model
  200. unusual SET amp design, your thoughts please
  201. Capacitor type for tube preamp
  202. Siemens e83cc Long plate triple mica?
  203. Help identafying 2 Output Transoromers?
  204. Tube Rectified Power Supplies
  205. Audio Nirvana 300B SET amp.
  206. Plotting plate curves past dissipation limit
  207. Massive Old Console... Repair or gut and replace with modern stuff?
  208. Tap Cap?
  209. Tube recommendations for bass amp
  210. OLD vs NEW tube amplifier circuits
  211. Who Made These Amps.
  212. An Amp oddity
  213. Linyun 300B Luxury edition
  214. Can plate chokes be THAT different?
  215. Pye HF25 Tube Monoblocks: Restoring Legends
  216. Millett Hybrid headphone amp.
  217. 6n2p-ev
  218. Idea for driver for CF output stage
  219. Problem with KT88 Williamson LTSpice simulation
  220. voltage regulator tubes
  221. Input impedance of grounded grid stage?
  222. tube upgrade benefits , worth the money ? 6R3S-1 , EF86
  223. Riaa MM high gain, low impedance.
  224. increase live 211 tube
  225. Need help with OPT for Loewe Opta Apollo Stereo
  226. Potentiometer & Power Switch Help
  227. Audio Note M2 Riaa.
  228. Is it the end of Blackburn Microtech tubes?
  229. Please critique my PSU design
  230. Audio Novice
  231. What vintage gear to source for tubes and transformers?
  232. 6n6p source
  233. (2) 6AV6 instead of 12ax7
  234. Preamp mod with tone control - comment please
  235. Roland branded 12AX7 tube?
  236. Questions about updates/upgrades
  237. When doubling output-tubes: What needs to be considered ?
  238. Audio Research SP-10 help needed
  239. Safety Tip For The Day
  240. PSU Output: Tubecad PS-1 Question
  241. Micro Channel Plate (MCP) audio amplifier
  242. bell mod 2445
  243. found a vintage dynacord concert el84 amp
  244. Stability problems, help please?
  245. Do I NEED to bring up an old amp on veriac?
  246. 6P15 / EL84 Sort of Para-Feed, Cathode-Drive, Hybrid
  247. Crosstalk L-R. Acceptable levels?
  248. Electronic diagramming tools with power and output transformer symbols
  249. Yaqin MS MC - 30L Amp
  250. Www.pimmlabs.com not available

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