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  1. 2W on 8Ohm OTL amplifier?
  2. EC88 dirver PL84 push-pull,DIY with a picture tells a story.
  3. DC/DC from 12V to 240V@25mA example
  4. the small SE UL ECL 86 / EY 82
  5. 1934 RCA Radio
  6. Recommendations for wiring a Red LED as a pilot lamp
  7. Retensioning UX4 (300b) tube pin socket
  8. Looking for power transformer source - details inside
  9. High voltage delay circuit
  10. op-amp current source
  11. Conrad Johnson ART II Blow-up
  12. Help In Determining Amplifier's Output
  13. Unknown tube identification help?
  14. 6S45P HP-Amp help with tail CCS
  15. shuguang EL84 question
  16. Audioromy FU29 M828A High Pitch Squeal / Whine / Whistle
  17. Unknown ECC-83
  18. 6MN8 connected as one triode
  19. 7247 and 6GF7A in driver circuits
  20. I'm looking for a PPP with el34
  21. Output transformer measurements
  22. Volume control crackles on SET hooked to F4.
  23. EF80 push EL153, DIY with a picture tells a story.
  24. Audioromy m 828 a / 829b FU29 Bias / Balance Help
  25. The zero bias valve
  26. KT61 testing
  27. SET Stereo Amplifier
  28. Klangfilm 408a Output Transformers
  29. Too Large Grid Resistor?
  30. Sound master # 34 tube amp
  31. Echolette M40 Cap job ... now everything sucks
  32. dual coil choke
  33. looking for ML6 tubes
  34. 220V Transformer question
  35. 1 or 2 watt fire resistant metal film resistors
  36. 6GK5 SRPP
  37. Unknown Amplifier - Anyone recognise it
  38. Help me ID a tube?
  39. Triode electronics difficulties
  40. Can anyone ID this car amp trans?
  41. Multi Stage amplifier bandwidth.
  42. Chassis Question
  43. Converting Stereo SE to Parallel SE Monoblock
  44. Just got a Hickok 539B! Have questions!
  45. Can regulated B+ act like a CCS?
  46. Quad II valve matching
  47. Heater Current - per valve or per triode ?
  48. OT for 12AU7 preamp?
  49. Which James output for a Lacewood SE
  50. Help Matching RCA 5692 Tubes
  51. Yet another ECL82 se
  52. Psvane 211-TII ... Pushing them above 75W Pa
  53. Fisher X 100 A restoration questions?
  54. Brook 12A Q
  55. HT voltage for preamp circuit vs output circuit
  56. Please explain this H3 3rd harmonic cancellation
  57. Recommended speaker selector for tube amplifiers?
  58. Should I use a choke?
  59. 12DW7/7427 tube question
  60. philips 228 radiogram
  61. soft start and delay start - help please
  62. Grounding and GFCI circuits
  63. SuperTriode with BJT and MosFet - a good idea?
  64. 6AQ5/6005 12AX7 Amp
  65. Hamlin's 20-20 / Trio w45 : looking for legible schematic
  66. Dynaco PAS 3X - help with an old modification
  67. Power supply 500v
  68. Anyone use 816 mercury vapor 1/2 wave rec tube
  69. Lamm clone
  70. Zobel RC network and stability of GNF SE amplifier
  71. Screen driven 6KD6 SE
  72. Comments about regulators
  73. Rolling 6C33
  74. Crazy B+ Issue???
  75. Psvane EL34PH replica - reliability?
  76. Help designing regulated power supply
  77. Tube wiring guide line
  78. Chassis earth and ground
  79. 7868 to 7591
  80. Maximum Screen Voltage for Triode Strapped 1625 or 837
  81. AT-50 British transmitting triode
  82. Problem with power tubes
  83. A 6Y6 Push Pull amplifier
  84. Testing
  85. 6CG7 Hybrid Tube Headphone Amp
  86. Choke On The Output Of A Tube Amp
  87. 6n3p buffer?
  88. 4P1L vs 4P1S
  89. Moving from 6N16B to 6021/CV3986 in Cayin HA-3
  90. "La Luxuriante" R120 SE amplifier
  91. Tube Headphone Amp Design and Help With Inverse Pre-Distortion Circuit
  92. Looking For Some Help
  93. Audio dummy load
  94. Custom-made transformers in USA
  95. Etude - Amplifier for study
  96. Can you mix glow tubes and zeners for shunt regs?
  97. tubes4hifi - Amplifier Sound, other kits?
  98. Suggest source for inexpensive chassis for tube amp project?
  99. Reverse Tube Regulator?
  100. Leak Stereo 20 Problem
  101. Choke for 6v6 lacewood amp.
  102. Output Tube Options for Scott 399
  103. ST-35 Z565 Output Transformer Troubles?
  104. Point to Point Wiring Tube Preamp
  105. Siamese RG-6
  106. Gz34 rectifier with dc heater
  107. line preamp
  108. A bit of help with my phono preamp
  109. Aikido Cascode Preamp build
  110. Can EL34 replace KT88?
  111. Current Draw of CJ ART??
  112. Square wave overshot=worm sound?
  113. Band pass filter for tube amps
  114. Screen drive and the 6AG9
  115. Cleaning odd potentiometer
  116. Removing a Jolida 502 Balance Control
  117. "The unequal twins" ECC83 / ECC99 Triode and 6N1P / E280F pentode amps
  118. Marantz 8 blowing fuse
  119. A newbie question about 12AX7 tube
  120. Web resources
  121. Transformer Shrouding - Purpose/Effectiveness
  122. current source
  123. KT88 Schematic - please help
  124. 105C to 85C Capacitors in Cheap Chinese Preamp
  125. Need help with plate CCS in 6EM7
  126. Need help on replacing Cap on Marantz 8
  127. Transformer for 12ax7 B+ calculation
  128. First amp build, advice and thoughts encouraged!!
  129. Proposed E-Linear PP 6L6GB w/ EL83 LTP - Critique?
  130. Luxman CL36, schematic
  131. Help with input impedance
  132. phono sp16
  133. Looking for a 20W amp schematics
  134. Ruggedized tube construction?
  135. Quicksilver full function preamplifier
  136. Another variants of using PCB from Ebay
  137. Valves very close each other...
  138. HF valve amp?
  139. Eico ST70 construction manual...
  140. Audio Research $30 FET!
  141. value in humour
  142. "rejuvenate" oxide cathode
  143. el84 se amp layout
  144. the grand return. 3d21A triode PP
  145. How did receiving valve manufacture compare to the LHC ...
  146. Classi RIAA preamp questions
  147. Max input voltage with negative feedback in place?
  148. Is there a 9-pin mini equivalent of 6AU6?
  149. Which DHT tube, mu>30 driver duty
  150. LTP and H3 distortion
  151. Schematics for Bendix 6384
  152. Has anybody compared distortion profiles of their amp designs?
  153. Dynacord transformer sparks flying
  154. Why this exists?
  155. Help with strange valve project:)
  156. help with these transformers please
  157. Bias a heater supply with humdinger?
  158. Question About Isolating Grounds
  159. How close is close enough for setting bias?
  160. Vitamin Q or Auricaps for coupling...any opinions?
  161. High current from EL84 measured on tubetester
  162. Power supply design for my preamp
  163. How do I get USB input into a tube amp?
  164. Janus Shunt Regulator / Aikido Octal build
  165. 6SN7 or 12AU7 Tube preamp for Gainclone
  166. E-Linear, P-P pentode application
  167. 6n6p preamp. Does it look ok?
  168. www.grippeaz.com
  169. Capacitance value help
  170. 6C33 SVETLANA in 1979??
  171. FYI: MCM 555-7125 Transformer Info
  172. Anyone use 39/44 for audio?
  173. I think its about time for me to design my first Transformer tube amp..
  174. Q: EL84 PP - Bias switch, PS regulation
  175. Balanced to unbalanced converter solution with only one dual triode?
  176. ECL85 G1+G2 Driven Amp Concept - Worth Pursuing?
  177. What is this called? "Triode with active load"?
  178. Type 50 triode amp
  179. Triode strapped C3G
  180. Newbie looking for first tube project. Maggie 9308 or like suggestions?
  181. Poindexter's Musical Machine:Tube Power Supply Schematic
  182. SE EL34 cathode help ?
  183. How to add "Vu-Meters and "Subwoofer Out" to a tube amp...
  184. Audio Research D90... a HOT, buzzing amplifier
  185. Lundahl LL1670 grid choke -- One or two needed for push-pull?
  186. At this stage of my experience almost too afraid to ask
  187. Help with EM7 circuit
  188. Ceramic or plastic noval socket
  189. Need connection info for Thordarson 22S86
  190. Harmon Kardon A500 Redux
  191. Schematic for 2A3/300B SET OTL amp
  192. Bias circuit for fixed bias
  193. Ultrapath with cathode bypass cap: which value of C is correct?
  194. Volume Control Tube Amp / Graaf Graafiti WFB one
  195. Pultec EGP-2 control pannel
  196. Emission values?
  197. Capacitor Upgrade for S5 Electronics (16LS)
  198. 'nipple' in waveform - What is it?
  199. High impedance speaker for SET OTL amps.
  200. Uneven output from LL1677
  201. Ugh. Need help with hum
  202. 6H16B plate follower output stage
  203. Tube preamp 30 gain design with 12ax7
  204. Operating points for 6n2p
  205. Sensing current in high voltage DHT circuits.
  206. Have you tested if two coupling capacitors in parallel are better than one sonically?
  207. DHT filament circuits - best wirewound resistors?
  208. Dual Pentode as two seperate Pentodes.
  209. Double "C" core OPT question
  210. EL34 pentode to triode feedback
  211. Chinese 7308?
  212. DC coupled circuits
  213. Need a complete amp kit for newbie
  214. Making a tube amp
  215. Tube amp diode question
  216. Michaelson Chronos
  217. Preamp question
  218. 6SJ7 and 6SC7 not on roll chart
  219. Graaf GM20 6C33
  220. Does Ultra-Linear SE reduce harmonic distortion?
  221. How to use a 3 prong plug with a Dynaco MkIII?
  222. 6e5-6e6 tube-operating point-absolute maximum rating
  223. LIFePO4 battery cathode bias
  224. Audible Illusions Modulus 3A CD input resistor values
  225. Insulation for component leads in point to point wiring
  226. Advices on first tube amp
  227. 300B Tube Shootout
  228. Unison reasearch Mystery One
  229. 4P10C or 4Π10C tube, any member familiar with?
  230. Largest decoupling cap (DC block on signal path)
  231. Control Grid Feedback (as opposed to Cathode FB) and Miller Capacitance
  232. 211 / 845 ccs?
  233. Eimac 35T any good for an amplifier?
  234. What speaker impedance for a 5 ohm amplifier
  235. Almarro A318B SET Amplifier Simple Modifications For Improved Performance?
  236. Hammond interstage
  237. Bias Arrangement
  238. question about connecting my tube amp to a receiver
  239. Pentode screen bypass capacitor
  240. MINGDA MC845 AA schematics
  241. Faulty Output Transformer
  242. The makings of a nice SEP amp from an audio oscillator?
  243. Audio pot with tap
  244. tube amp and jbl crossover connection
  245. SE EL84 high screen and plate
  246. Marantz 7 line stage with DAC
  247. help with Ecc82/12AU7 selection
  248. Kt88's and 6SN7's?
  249. KR T-1610: What can I do with it?
  250. Schematic

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