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  1. ming da mc 845 aa modification
  2. How good can this headphone amp/pre amp be?
  3. Zero Bias Solution?
  4. Cathode Degeneration with CCS plate load- My Mistake
  5. Pilot 240 with too much bass-- circuit modification needed?
  6. EL34 DIY "centre-tapped" tube ??
  7. Advice for Super Cheap & Simple 829b based amp from spare parts
  8. Infineon IPA50R140CP N-channel mosfet
  9. Borberly Op amp 4 Tube Mosfet hybrid
  10. Splitting Power Supply Choke Question
  11. Toroidal PT as OPT in big power application?
  12. Inrush limiter question
  13. Counterpoint AS-5.1 Tube Type Question
  14. OPT connections
  15. Help teach a CS guy to test a tube amp!
  16. Now THIS is an output transformer
  17. Gas rectifier vs vacuum rectifier
  18. What value for the bias resistor of a SE 6550?
  19. ELL80 tube-Ultralinear mode???
  20. Russian "6L6" ID
  21. Tube amp for a car lol
  22. S5 Electronics Upgrade
  23. Best Tube for SPUD Amp
  24. Zenith 7b31 EL84 Tube Amp Low Volume
  25. Heater cathode elevation
  26. 6K5GT & EL36 AMP
  27. Grid stopper by ECC83
  28. 6L6 Without Screen Drive?
  29. Fusion Postmodernism and tube amps ---- 6SN7 + 26 45
  30. Mullard V.T.52 Push-Pull Tube AMP.
  31. Amp for Magneplaner 1,6/R
  32. Car tube amp- looking for advice
  33. Direct replacement for 5Z3PA and 5Z3P Rectifier
  34. 83 Rectifier
  35. Ground noise and hum: why and how to maybe fix it
  36. How to measure SNR?
  37. Triode vs Pentode cathode followers
  38. Damaged tubes
  39. 2W on 8Ohm OTL amplifier?
  40. EC88 dirver PL84 push-pull,DIY with a picture tells a story.
  41. DC/DC from 12V to 240V@25mA example
  42. the small SE UL ECL 86 / EY 82
  43. 1934 RCA Radio
  44. Recommendations for wiring a Red LED as a pilot lamp
  45. Retensioning UX4 (300b) tube pin socket
  46. Looking for power transformer source - details inside
  47. High voltage delay circuit
  48. op-amp current source
  49. Conrad Johnson ART II Blow-up
  50. Help In Determining Amplifier's Output
  51. Unknown tube identification help?
  52. 6S45P HP-Amp help with tail CCS
  53. shuguang EL84 question
  54. Audioromy FU29 M828A High Pitch Squeal / Whine / Whistle
  55. Unknown ECC-83
  56. 6MN8 connected as one triode
  57. 7247 and 6GF7A in driver circuits
  58. I'm looking for a PPP with el34
  59. Output transformer measurements
  60. Volume control crackles on SET hooked to F4.
  61. EF80 push EL153, DIY with a picture tells a story.
  62. Audioromy m 828 a / 829b FU29 Bias / Balance Help
  63. The zero bias valve
  64. KT61 testing
  65. SET Stereo Amplifier
  66. Klangfilm 408a Output Transformers
  67. Too Large Grid Resistor?
  68. Sound master # 34 tube amp
  69. Echolette M40 Cap job ... now everything sucks
  70. dual coil choke
  71. looking for ML6 tubes
  72. 220V Transformer question
  73. 1 or 2 watt fire resistant metal film resistors
  74. 6GK5 SRPP
  75. Unknown Amplifier - Anyone recognise it
  76. Help me ID a tube?
  77. Triode electronics difficulties
  78. Can anyone ID this car amp trans?
  79. Multi Stage amplifier bandwidth.
  80. Chassis Question
  81. Converting Stereo SE to Parallel SE Monoblock
  82. Just got a Hickok 539B! Have questions!
  83. Can regulated B+ act like a CCS?
  84. Quad II valve matching
  85. Heater Current - per valve or per triode ?
  86. OT for 12AU7 preamp?
  87. Which James output for a Lacewood SE
  88. Help Matching RCA 5692 Tubes
  89. Yet another ECL82 se
  90. Psvane 211-TII ... Pushing them above 75W Pa
  91. Fisher X 100 A restoration questions?
  92. Brook 12A Q
  93. HT voltage for preamp circuit vs output circuit
  94. Please explain this H3 3rd harmonic cancellation
  95. Recommended speaker selector for tube amplifiers?
  96. Should I use a choke?
  97. 12DW7/7427 tube question
  98. philips 228 radiogram
  99. soft start and delay start - help please
  100. Grounding and GFCI circuits
  101. SuperTriode with BJT and MosFet - a good idea?
  102. 6AQ5/6005 12AX7 Amp
  103. Hamlin's 20-20 / Trio w45 : looking for legible schematic
  104. Dynaco PAS 3X - help with an old modification
  105. Power supply 500v
  106. Anyone use 816 mercury vapor 1/2 wave rec tube
  107. Lamm clone
  108. Zobel RC network and stability of GNF SE amplifier
  109. Screen driven 6KD6 SE
  110. Comments about regulators
  111. Rolling 6C33
  112. Crazy B+ Issue???
  113. Psvane EL34PH replica - reliability?
  114. Help designing regulated power supply
  115. Tube wiring guide line
  116. Chassis earth and ground
  117. 7868 to 7591
  118. Maximum Screen Voltage for Triode Strapped 1625 or 837
  119. AT-50 British transmitting triode
  120. Problem with power tubes
  121. A 6Y6 Push Pull amplifier
  122. Testing
  123. 6CG7 Hybrid Tube Headphone Amp
  124. Choke On The Output Of A Tube Amp
  125. 6n3p buffer?
  126. 4P1L vs 4P1S
  127. Moving from 6N16B to 6021/CV3986 in Cayin HA-3
  128. "La Luxuriante" R120 SE amplifier
  129. Tube Headphone Amp Design and Help With Inverse Pre-Distortion Circuit
  130. Looking For Some Help
  131. Audio dummy load
  132. Custom-made transformers in USA
  133. Etude - Amplifier for study
  134. Can you mix glow tubes and zeners for shunt regs?
  135. tubes4hifi - Amplifier Sound, other kits?
  136. Suggest source for inexpensive chassis for tube amp project?
  137. Reverse Tube Regulator?
  138. Leak Stereo 20 Problem
  139. Choke for 6v6 lacewood amp.
  140. Output Tube Options for Scott 399
  141. ST-35 Z565 Output Transformer Troubles?
  142. Point to Point Wiring Tube Preamp
  143. Siamese RG-6
  144. Gz34 rectifier with dc heater
  145. line preamp
  146. A bit of help with my phono preamp
  147. Aikido Cascode Preamp build
  148. Can EL34 replace KT88?
  149. Current Draw of CJ ART??
  150. Square wave overshot=worm sound?
  151. Band pass filter for tube amps
  152. Screen drive and the 6AG9
  153. Cleaning odd potentiometer
  154. Removing a Jolida 502 Balance Control
  155. "The unequal twins" ECC83 / ECC99 Triode and 6N1P / E280F pentode amps
  156. Marantz 8 blowing fuse
  157. A newbie question about 12AX7 tube
  158. Web resources
  159. Transformer Shrouding - Purpose/Effectiveness
  160. current source
  161. KT88 Schematic - please help
  162. Resistors
  163. 105C to 85C Capacitors in Cheap Chinese Preamp
  164. Need help with plate CCS in 6EM7
  165. Need help on replacing Cap on Marantz 8
  166. Transformer for 12ax7 B+ calculation
  167. First amp build, advice and thoughts encouraged!!
  168. Proposed E-Linear PP 6L6GB w/ EL83 LTP - Critique?
  169. Luxman CL36, schematic
  170. Help with input impedance
  171. phono sp16
  172. Looking for a 20W amp schematics
  173. Ruggedized tube construction?
  174. Quicksilver full function preamplifier
  175. Another variants of using PCB from Ebay
  176. Valves very close each other...
  177. HF valve amp?
  178. Eico ST70 construction manual...
  179. Audio Research $30 FET!
  180. value in humour
  181. "rejuvenate" oxide cathode
  182. el84 se amp layout
  183. the grand return. 3d21A triode PP
  184. How did receiving valve manufacture compare to the LHC ...
  185. Classi RIAA preamp questions
  186. Max input voltage with negative feedback in place?
  187. Is there a 9-pin mini equivalent of 6AU6?
  188. Which DHT tube, mu>30 driver duty
  189. LTP and H3 distortion
  190. Schematics for Bendix 6384
  191. Has anybody compared distortion profiles of their amp designs?
  192. Dynacord transformer sparks flying
  193. Why this exists?
  194. Help with strange valve project:)
  195. help with these transformers please
  196. Powersupply
  197. Bias a heater supply with humdinger?
  198. Question About Isolating Grounds
  199. How close is close enough for setting bias?
  200. Vitamin Q or Auricaps for coupling...any opinions?
  201. High current from EL84 measured on tubetester
  202. Power supply design for my preamp
  203. How do I get USB input into a tube amp?
  204. Janus Shunt Regulator / Aikido Octal build
  205. 6SN7 or 12AU7 Tube preamp for Gainclone
  206. E-Linear, P-P pentode application
  207. 6n6p preamp. Does it look ok?
  208. www.grippeaz.com
  209. Capacitance value help
  210. 6C33 SVETLANA in 1979??
  211. FYI: MCM 555-7125 Transformer Info
  212. Anyone use 39/44 for audio?
  213. I think its about time for me to design my first Transformer tube amp..
  214. Q: EL84 PP - Bias switch, PS regulation
  215. Balanced to unbalanced converter solution with only one dual triode?
  216. ECL85 G1+G2 Driven Amp Concept - Worth Pursuing?
  217. What is this called? "Triode with active load"?
  218. Type 50 triode amp
  219. Chargecontroller for LIFePO4
  220. Triode strapped C3G
  221. Newbie looking for first tube project. Maggie 9308 or like suggestions?
  222. Poindexter's Musical Machine:Tube Power Supply Schematic
  223. SE EL34 cathode help ?
  224. How to add "Vu-Meters and "Subwoofer Out" to a tube amp...
  225. Audio Research D90... a HOT, buzzing amplifier
  226. Lundahl LL1670 grid choke -- One or two needed for push-pull?
  227. At this stage of my experience almost too afraid to ask
  228. Help with EM7 circuit
  229. Ceramic or plastic noval socket
  230. Need connection info for Thordarson 22S86
  231. Max voltage across microphone signal transformer.
  232. Harmon Kardon A500 Redux
  233. Schematic for 2A3/300B SET OTL amp
  234. Bias circuit for fixed bias
  235. Ultrapath with cathode bypass cap: which value of C is correct?
  236. Volume Control Tube Amp / Graaf Graafiti WFB one
  237. Pultec EGP-2 control pannel
  238. Emission values?
  239. Capacitor Upgrade for S5 Electronics (16LS)
  240. 'nipple' in waveform - What is it?
  241. High impedance speaker for SET OTL amps.
  242. Uneven output from LL1677
  243. Ugh. Need help with hum
  244. 6H16B plate follower output stage
  245. Tube preamp 30 gain design with 12ax7
  246. Operating points for 6n2p
  247. Sensing current in high voltage DHT circuits.
  248. Have you tested if two coupling capacitors in parallel are better than one sonically?
  249. DHT filament circuits - best wirewound resistors?
  250. Dual Pentode as two seperate Pentodes.

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