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  1. Heater Current - per valve or per triode ?
  2. OT for 12AU7 preamp?
  3. Which James output for a Lacewood SE
  4. Help Matching RCA 5692 Tubes
  5. Yet another ECL82 se
  6. Psvane 211-TII ... Pushing them above 75W Pa
  7. Fisher X 100 A restoration questions?
  8. Brook 12A Q
  9. HT voltage for preamp circuit vs output circuit
  10. Please explain this H3 3rd harmonic cancellation
  11. Recommended speaker selector for tube amplifiers?
  12. Should I use a choke?
  13. 12DW7/7427 tube question
  14. philips 228 radiogram
  15. soft start and delay start - help please
  16. Grounding and GFCI circuits
  17. SuperTriode with BJT and MosFet - a good idea?
  18. 6AQ5/6005 12AX7 Amp
  19. Hamlin's 20-20 / Trio w45 : looking for legible schematic
  20. Dynaco PAS 3X - help with an old modification
  21. Power supply 500v
  22. Anyone use 816 mercury vapor 1/2 wave rec tube
  23. Lamm clone
  24. Zobel RC network and stability of GNF SE amplifier
  25. Screen driven 6KD6 SE
  26. Comments about regulators
  27. Rolling 6C33
  28. Crazy B+ Issue???
  29. Psvane EL34PH replica - reliability?
  30. Help designing regulated power supply
  31. Tube wiring guide line
  32. Chassis earth and ground
  33. 7868 to 7591
  34. Maximum Screen Voltage for Triode Strapped 1625 or 837
  35. AT-50 British transmitting triode
  36. Problem with power tubes
  37. A 6Y6 Push Pull amplifier
  38. Testing
  39. 6CG7 Hybrid Tube Headphone Amp
  40. Choke On The Output Of A Tube Amp
  41. 6n3p buffer?
  42. 4P1L vs 4P1S
  43. Moving from 6N16B to 6021/CV3986 in Cayin HA-3
  44. "La Luxuriante" R120 SE amplifier
  45. Tube Headphone Amp Design and Help With Inverse Pre-Distortion Circuit
  46. Looking For Some Help
  47. Audio dummy load
  48. Custom-made transformers in USA
  49. Etude - Amplifier for study
  50. Can you mix glow tubes and zeners for shunt regs?
  51. tubes4hifi - Amplifier Sound, other kits?
  52. Suggest source for inexpensive chassis for tube amp project?
  53. Reverse Tube Regulator?
  54. Leak Stereo 20 Problem
  55. Choke for 6v6 lacewood amp.
  56. Output Tube Options for Scott 399
  57. ST-35 Z565 Output Transformer Troubles?
  58. Point to Point Wiring Tube Preamp
  59. Siamese RG-6
  60. Gz34 rectifier with dc heater
  61. line preamp
  62. A bit of help with my phono preamp
  63. Aikido Cascode Preamp build
  64. Can EL34 replace KT88?
  65. Current Draw of CJ ART??
  66. Square wave overshot=worm sound?
  67. Band pass filter for tube amps
  68. Screen drive and the 6AG9
  69. Cleaning odd potentiometer
  70. Removing a Jolida 502 Balance Control
  71. "The unequal twins" ECC83 / ECC99 Triode and 6N1P / E280F pentode amps
  72. Marantz 8 blowing fuse
  73. A newbie question about 12AX7 tube
  74. Web resources
  75. Transformer Shrouding - Purpose/Effectiveness
  76. current source
  77. KT88 Schematic - please help
  78. Resistors
  79. 105C to 85C Capacitors in Cheap Chinese Preamp
  80. Need help with plate CCS in 6EM7
  81. Need help on replacing Cap on Marantz 8
  82. Transformer for 12ax7 B+ calculation
  83. First amp build, advice and thoughts encouraged!!
  84. Proposed E-Linear PP 6L6GB w/ EL83 LTP - Critique?
  85. Luxman CL36, schematic
  86. Help with input impedance
  87. phono sp16
  88. Looking for a 20W amp schematics
  89. Ruggedized tube construction?
  90. Quicksilver full function preamplifier
  91. Another variants of using PCB from Ebay
  92. Valves very close each other...
  93. HF valve amp?
  94. Eico ST70 construction manual...
  95. Audio Research $30 FET!
  96. value in humour
  97. "rejuvenate" oxide cathode
  98. el84 se amp layout
  99. the grand return. 3d21A triode PP
  100. How did receiving valve manufacture compare to the LHC ...
  101. Classi RIAA preamp questions
  102. Max input voltage with negative feedback in place?
  103. Is there a 9-pin mini equivalent of 6AU6?
  104. Which DHT tube, mu>30 driver duty
  105. LTP and H3 distortion
  106. Schematics for Bendix 6384
  107. Has anybody compared distortion profiles of their amp designs?
  108. Dynacord transformer sparks flying
  109. Why this exists?
  110. Help with strange valve project:)
  111. help with these transformers please
  112. Powersupply
  113. Bias a heater supply with humdinger?
  114. Question About Isolating Grounds
  115. How close is close enough for setting bias?
  116. Vitamin Q or Auricaps for coupling...any opinions?
  117. High current from EL84 measured on tubetester
  118. Power supply design for my preamp
  119. How do I get USB input into a tube amp?
  120. Janus Shunt Regulator / Aikido Octal build
  121. 6SN7 or 12AU7 Tube preamp for Gainclone
  122. E-Linear, P-P pentode application
  123. 6n6p preamp. Does it look ok?
  124. www.grippeaz.com
  125. Capacitance value help
  126. 6C33 SVETLANA in 1979??
  127. FYI: MCM 555-7125 Transformer Info
  128. Anyone use 39/44 for audio?
  129. I think its about time for me to design my first Transformer tube amp..
  130. Q: EL84 PP - Bias switch, PS regulation
  131. Balanced to unbalanced converter solution with only one dual triode?
  132. ECL85 G1+G2 Driven Amp Concept - Worth Pursuing?
  133. What is this called? "Triode with active load"?
  134. Type 50 triode amp
  135. Chargecontroller for LIFePO4
  136. Triode strapped C3G
  137. Newbie looking for first tube project. Maggie 9308 or like suggestions?
  138. Poindexter's Musical Machine:Tube Power Supply Schematic
  139. SE EL34 cathode help ?
  140. How to add "Vu-Meters and "Subwoofer Out" to a tube amp...
  141. Audio Research D90... a HOT, buzzing amplifier
  142. Lundahl LL1670 grid choke -- One or two needed for push-pull?
  143. At this stage of my experience almost too afraid to ask
  144. Help with EM7 circuit
  145. Ceramic or plastic noval socket
  146. Need connection info for Thordarson 22S86
  147. Max voltage across microphone signal transformer.
  148. Harmon Kardon A500 Redux
  149. Schematic for 2A3/300B SET OTL amp
  150. Bias circuit for fixed bias
  151. Ultrapath with cathode bypass cap: which value of C is correct?
  152. Volume Control Tube Amp / Graaf Graafiti WFB one
  153. Pultec EGP-2 control pannel
  154. Emission values?
  155. Capacitor Upgrade for S5 Electronics (16LS)
  156. 'nipple' in waveform - What is it?
  157. High impedance speaker for SET OTL amps.
  158. Uneven output from LL1677
  159. Ugh. Need help with hum
  160. 6H16B plate follower output stage
  161. Tube preamp 30 gain design with 12ax7
  162. Operating points for 6n2p
  163. Sensing current in high voltage DHT circuits.
  164. Have you tested if two coupling capacitors in parallel are better than one sonically?
  165. DHT filament circuits - best wirewound resistors?
  166. Dual Pentode as two seperate Pentodes.
  167. Double "C" core OPT question
  168. EL34 pentode to triode feedback
  169. Chinese 7308?
  170. DC coupled circuits
  171. Need a complete amp kit for newbie
  172. Making a tube amp
  173. Tube amp diode question
  174. Michaelson Chronos
  175. Preamp question
  176. 6SJ7 and 6SC7 not on roll chart
  177. Graaf GM20 6C33
  178. Does Ultra-Linear SE reduce harmonic distortion?
  179. How to use a 3 prong plug with a Dynaco MkIII?
  180. 6e5-6e6 tube-operating point-absolute maximum rating
  181. LIFePO4 battery cathode bias
  182. Audible Illusions Modulus 3A CD input resistor values
  183. diode going into a tube rectifier
  184. Insulation for component leads in point to point wiring
  185. Advices on first tube amp
  186. 300B Tube Shootout
  187. Unison reasearch Mystery One
  188. 4P10C or 4Π10C tube, any member familiar with?
  189. Largest decoupling cap (DC block on signal path)
  190. Control Grid Feedback (as opposed to Cathode FB) and Miller Capacitance
  191. 211 / 845 ccs?
  192. Eimac 35T any good for an amplifier?
  193. What speaker impedance for a 5 ohm amplifier
  194. Almarro A318B SET Amplifier Simple Modifications For Improved Performance?
  195. Hammond interstage
  196. Bias Arrangement
  197. question about connecting my tube amp to a receiver
  198. Pentode screen bypass capacitor
  199. MINGDA MC845 AA schematics
  200. Faulty Output Transformer
  201. The makings of a nice SEP amp from an audio oscillator?
  202. Audio pot with tap
  203. tube amp and jbl crossover connection
  204. SE EL84 high screen and plate
  205. Marantz 7 line stage with DAC
  206. help with Ecc82/12AU7 selection
  207. Kt88's and 6SN7's?
  208. KR T-1610: What can I do with it?
  209. Simple voltage regulator
  210. Schematic
  211. Determining primary output load resistance...
  212. Warning about chokes by Toroidy
  213. Looking af new 845
  214. 807 Amplifier build.....Help Wanted
  215. Solid state power supply for tube amplifier.
  216. Power Transformer Rating Mythology?
  217. Claus Byrith 4-30 - HELP !
  218. LR8 as CCS for small tube cathode follower?
  219. Tektronix 120-086 transformer
  220. 01A question
  221. Determining input impedance
  222. Plate to cathode feedback
  223. Quick question about EL84 PSE
  224. P-SET EL34
  225. 6v6 Preamp Explorations
  226. Monoblock kits for $500
  227. Wanted/Needed Vaic Valve / KR 52B etc.
  228. Measuring Rp on the bench
  229. Clarifying RIAA calculations
  230. Emissions Labs 5U4G use statements
  231. Help me pick my first tube kit/winter project (tube preamp)
  232. Please explain feedback to an ignoramus
  233. Op-Amp/Power tube integration
  234. 12b4a preamp project
  235. Pot to Stepping and ohmic value change
  236. McIntosh MC2000
  237. universal high-gain pre-amp useful ?
  238. 6AX5, the forgotten rectifier?
  239. High gain pentode LTP?
  240. question with heater wiring
  241. Ideas for an hi-fi mono amplifier (and preamplifier)
  242. humm and buzz
  243. ECC88 For LTP
  244. Polam / Telam tubes !
  245. Question about grid input signal voltage
  246. Douk EL34 Amp kit
  247. ID help Please Hammond Amp
  248. rolling ecc88 into a 6cg7 socket
  249. Article Wanted - "High Quality Amplifier with the 6AS7G" by McProud
  250. capacitors

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