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  1. EC88 dirver PL84 push-pull,DIY with a picture tells a story.
  2. DC/DC from 12V to 240V@25mA example
  3. the small SE UL ECL 86 / EY 82
  4. 1934 RCA Radio
  5. Recommendations for wiring a Red LED as a pilot lamp
  6. Retensioning UX4 (300b) tube pin socket
  7. Looking for power transformer source - details inside
  8. High voltage delay circuit
  9. op-amp current source
  10. Conrad Johnson ART II Blow-up
  11. Help In Determining Amplifier's Output
  12. Unknown tube identification help?
  13. 6S45P HP-Amp help with tail CCS
  14. shuguang EL84 question
  15. Audioromy FU29 M828A High Pitch Squeal / Whine / Whistle
  16. Unknown ECC-83
  17. 6MN8 connected as one triode
  18. 7247 and 6GF7A in driver circuits
  19. I'm looking for a PPP with el34
  20. Output transformer measurements
  21. Volume control crackles on SET hooked to F4.
  22. EF80 push EL153, DIY with a picture tells a story.
  23. Audioromy M828A/829B FU29 Bias/Balance Help
  24. The zero bias valve
  25. KT61 testing
  26. SET Stereo Amplifier
  27. Klangfilm 408a Output Transformers
  28. Too Large Grid Resistor?
  29. Sound master # 34 tube amp
  30. Echolette M40 Cap job ... now everything sucks
  31. dual coil choke
  32. looking for ML6 tubes
  33. 220V Transformer question
  34. 6GK5 SRPP
  35. Unknown Amplifier - Anyone recognise it
  36. Help me ID a tube?
  37. Triode electronics difficulties
  38. Can anyone ID this car amp trans?
  39. Multi Stage amplifier bandwidth.
  40. Chassis Question
  41. Converting Stereo SE to Parallel SE Monoblock
  42. Can regulated B+ act like a CCS?
  43. Quad II valve matching
  44. Heater Current - per valve or per triode ?
  45. OT for 12AU7 preamp?
  46. Which James output for a Lacewood SE
  47. Help Matching RCA 5692 Tubes
  48. Yet another ECL82 se
  49. Psvane 211-TII ... Pushing them above 75W Pa
  50. Fisher X 100 A restoration questions?
  51. Brook 12A Q
  52. HT voltage for preamp circuit vs output circuit
  53. Please explain this H3 3rd harmonic cancellation
  54. Recommended speaker selector for tube amplifiers?
  55. Should I use a choke?
  56. 12DW7/7427 tube question
  57. philips 228 radiogram
  58. soft start and delay start - help please
  59. Grounding and GFCI circuits
  60. SuperTriode with BJT and MosFet - a good idea?
  61. 6AQ5/6005 12AX7 Amp
  62. Hamlin's 20-20 / Trio w45 : looking for legible schematic
  63. Dynaco PAS 3X - help with an old modification
  64. Power supply 500v
  65. Anyone use 816 mercury vapor 1/2 wave rec tube
  66. Lamm clone
  67. Zobel RC network and stability of GNF SE amplifier
  68. Screen driven 6KD6 SE
  69. Comments about regulators
  70. Rolling 6C33
  71. Crazy B+ Issue???
  72. Psvane EL34PH replica - reliability?
  73. Help designing regulated power supply
  74. Tube wiring guide line
  75. Chassis earth and ground
  76. 7868 to 7591
  77. Maximum Screen Voltage for Triode Strapped 1625 or 837
  78. AT-50 British transmitting triode
  79. Problem with power tubes
  80. A 6Y6 Push Pull amplifier
  81. Testing
  82. 6CG7 Hybrid Tube Headphone Amp
  83. Choke On The Output Of A Tube Amp
  84. 6n3p buffer?
  85. 4P1L vs 4P1S
  86. Moving from 6N16B to 6021/CV3986 in Cayin HA-3
  87. "La Luxuriante" R120 SE amplifier
  88. Tube Headphone Amp Design and Help With Inverse Pre-Distortion Circuit
  89. Looking For Some Help
  90. Audio dummy load
  91. Custom-made transformers in USA
  92. Etude - Amplifier for study
  93. Can you mix glow tubes and zeners for shunt regs?
  94. tubes4hifi - Amplifier Sound, other kits?
  95. Suggest source for inexpensive chassis for tube amp project?
  96. Reverse Tube Regulator?
  97. Leak Stereo 20 Problem
  98. Choke for 6v6 lacewood amp.
  99. Output Tube Options for Scott 399
  100. ST-35 Z565 Output Transformer Troubles?
  101. Point to Point Wiring Tube Preamp
  102. Siamese RG-6
  103. Gz34 rectifier with dc heater
  104. line preamp
  105. A bit of help with my phono preamp
  106. Aikido Cascode Preamp build
  107. Can EL34 replace KT88?
  108. Current Draw of CJ ART??
  109. Square wave overshot=worm sound?
  110. Band pass filter for tube amps
  111. Screen drive and the 6AG9
  112. Cleaning odd potentiometer
  113. Removing a Jolida 502 Balance Control
  114. "The unequal twins" ECC83 / ECC99 Triode and 6N1P / E280F pentode amps
  115. Marantz 8 blowing fuse
  116. A newbie question about 12AX7 tube
  117. Web resources
  118. Transformer Shrouding - Purpose/Effectiveness
  119. current source
  120. KT88 Schematic - please help
  121. 105C to 85C Capacitors in Cheap Chinese Preamp
  122. Need help with plate CCS in 6EM7
  123. Need help on replacing Cap on Marantz 8
  124. Transformer for 12ax7 B+ calculation
  125. First amp build, advice and thoughts encouraged!!
  126. Proposed E-Linear PP 6L6GB w/ EL83 LTP - Critique?
  127. Luxman CL36, schematic
  128. Help with input impedance
  129. phono sp16
  130. Looking for a 20W amp schematics
  131. Ruggedized tube construction?
  132. Quicksilver full function preamplifier
  133. Another variants of using PCB from Ebay
  134. Valves very close each other...
  135. HF valve amp?
  136. Eico ST70 construction manual...
  137. value in humour
  138. "rejuvenate" oxide cathode
  139. el84 se amp layout
  140. the grand return. 3d21A triode PP
  141. How did receiving valve manufacture compare to the LHC ...
  142. Classi RIAA preamp questions
  143. Max input voltage with negative feedback in place?
  144. Is there a 9-pin mini equivalent of 6AU6?
  145. Which DHT tube, mu>30 driver duty
  146. LTP and H3 distortion
  147. Schematics for Bendix 6384
  148. Has anybody compared distortion profiles of their amp designs?
  149. Dynacord transformer sparks flying
  150. Why this exists?
  151. Help with strange valve project:)
  152. help with these transformers please
  153. Bias a heater supply with humdinger?
  154. Question About Isolating Grounds
  155. How close is close enough for setting bias?
  156. Vitamin Q or Auricaps for coupling...any opinions?
  157. High current from EL84 measured on tubetester
  158. Power supply design for my preamp
  159. How do I get USB input into a tube amp?
  160. Janus Shunt Regulator / Aikido Octal build
  161. 6SN7 or 12AU7 Tube preamp for Gainclone
  162. E-Linear, P-P pentode application
  163. 6n6p preamp. Does it look ok?
  164. www.grippeaz.com
  165. Capacitance value help
  166. 6C33 SVETLANA in 1979??
  167. FYI: MCM 555-7125 Transformer Info
  168. Anyone use 39/44 for audio?
  169. I think its about time for me to design my first Transformer tube amp..
  170. Q: EL84 PP - Bias switch, PS regulation
  171. Balanced to unbalanced converter solution with only one dual triode?
  172. ECL85 G1+G2 Driven Amp Concept - Worth Pursuing?
  173. What is this called? "Triode with active load"?
  174. Type 50 triode amp
  175. Triode strapped C3G
  176. Newbie looking for first tube project. Maggie 9308 or like suggestions?
  177. Poindexter's Musical Machine:Tube Power Supply Schematic
  178. SE EL34 cathode help ?
  179. How to add "Vu-Meters and "Subwoofer Out" to a tube amp...
  180. Audio Research D90... a HOT, buzzing amplifier
  181. Lundahl LL1670 grid choke -- One or two needed for push-pull?
  182. At this stage of my experience almost too afraid to ask
  183. Help with EM7 circuit
  184. Ceramic or plastic noval socket
  185. Need connection info for Thordarson 22S86
  186. Harmon Kardon A500 Redux
  187. Schematic for 2A3/300B SET OTL amp
  188. Bias circuit for fixed bias
  189. Ultrapath with cathode bypass cap: which value of C is correct?
  190. Volume Control Tube Amp / Graaf Graafiti WFB one
  191. Pultec EGP-2 control pannel
  192. Emission values?
  193. Capacitor Upgrade for S5 Electronics (16LS)
  194. 'nipple' in waveform - What is it?
  195. High impedance speaker for SET OTL amps.
  196. Uneven output from LL1677
  197. Ugh. Need help with hum
  198. 6H16B plate follower output stage
  199. Tube preamp 30 gain design with 12ax7
  200. Operating points for 6n2p
  201. Have you tested if two coupling capacitors in parallel are better than one sonically?
  202. DHT filament circuits - best wirewound resistors?
  203. Dual Pentode as two seperate Pentodes.
  204. Double "C" core OPT question
  205. EL34 pentode to triode feedback
  206. Chinese 7308?
  207. DC coupled circuits
  208. Need a complete amp kit for newbie
  209. Making a tube amp
  210. Tube amp diode question
  211. Michaelson Chronos
  212. Preamp question
  213. 6SJ7 and 6SC7 not on roll chart
  214. Graaf GM20 6C33
  215. Does Ultra-Linear SE reduce harmonic distortion?
  216. How to use a 3 prong plug with a Dynaco MkIII?
  217. 6e5-6e6 tube-operating point-absolute maximum rating
  218. LIFePO4 battery cathode bias
  219. Audible Illusions Modulus 3A CD input resistor values
  220. Insulation for component leads in point to point wiring
  221. Advices on first tube amp
  222. 300B Tube Shootout
  223. Unison reasearch Mystery One
  224. 4P10C or 4Π10C tube, any member familiar with?
  225. Largest decoupling cap (DC block on signal path)
  226. Control Grid Feedback (as opposed to Cathode FB) and Miller Capacitance
  227. 211 / 845 ccs?
  228. Eimac 35T any good for an amplifier?
  229. What speaker impedance for a 5 ohm amplifier
  230. Almarro A318B SET Amplifier Simple Modifications For Improved Performance?
  231. Hammond interstage
  232. Bias Arrangement
  233. question about connecting my tube amp to a receiver
  234. Pentode screen bypass capacitor
  235. MINGDA MC845 AA schematics
  236. Faulty Output Transformer
  237. The makings of a nice SEP amp from an audio oscillator?
  238. Audio pot with tap
  239. tube amp and jbl crossover connection
  240. SE EL84 high screen and plate
  241. Marantz 7 line stage with DAC
  242. help with Ecc82/12AU7 selection
  243. Kt88's and 6SN7's?
  244. KR T-1610: What can I do with it?
  245. Schematic
  246. Determining primary output load resistance...
  247. Warning about chokes by Toroidy
  248. Looking af new 845
  249. 807 Amplifier build.....Help Wanted
  250. Claus Byrith 4-30 - HELP !

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