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  1. Valve amp - vanishing bass
  2. 5Z3P 6N9P EL34B SE amplifier
  3. Wrapping my head around cathode followers. Does this explanation make sense?
  4. HK A500 rebuild
  5. LS7B Marantz 7 Clone PreAmp
  6. SS to drive 300b
  7. is the 12ax7 ever used on television sets?
  8. What topology was this old RCA power transformer designed for?
  9. BOM of Audio Research SP-11 MkII and D-115 MkII
  10. ECC88/6DJ8 at higher Va
  11. Valve headphone amp humming through headphones
  12. Merlin's new hi-fi valve preamp book is released
  13. Screen Drive 6BQ6GT Amp - Feasibility Study
  14. Harmon Kardon A50K project
  15. Reading high V through resistor/cap casings
  16. Troubleshooting magnavox 9302-00
  17. How Safe are Ceramic Top Caps?
  18. Vintage 1990's Audio Note 2k5 output transformer wiring color code
  19. Splitting the audio band into two transformers
  20. 21LG6/A P-P for 50+ watts?
  21. Anyone use an IEC line filter plug??
  22. pre Line 2 end Line 3
  23. NEW D3a equivalent on marked?
  24. Anyone tried Plitron transformers?
  25. Summing channels;Why? JE EL34
  26. TAJ's Harman Kardon Citation V rebuild thread
  27. Screened/shielded cables in chassis
  28. Cascode question re shunt to lower tube
  29. LED biasing in preamp - cap in parallel required?
  30. Can you identify these tube amplifiers? 4x807 & mercury vapor rectifiers
  31. Amperex BB ECC82 - Real or Fake?
  32. Max screen grid voltages in datasheets
  33. Tube rectifiers
  34. VT-25/10Y tubes
  35. Does anyone have the schematic for Transcendant Sound Mini Beast?
  36. Schematic help please
  37. Faulty rectifier valve possibly damaged my amplifier - help
  38. 6J1 tube buffer circuit diagram
  39. Filament transformer question
  40. Grundig 9060 output transformer identifying
  41. 6J1 biasing inconsistencies with datasheet
  42. Separate transformer for heaters. How to reference this to ground?
  43. 300B alternatives
  44. Stereo to Mono transformer based 'hybrid/bridging mixer'
  45. LK-48 over voltage
  46. Aikido all in one
  47. Bitsa Amp project
  48. Search for thread/article about phono preamp design
  49. Fusing valve amps
  50. AIKIDO line stage
  51. Cossor 61SPT - any experience?
  52. 6BG6GA PP, -bias, Amp built but couple problems
  53. GE 6sn7 made in Italy
  54. First SE Amp Build
  55. HV soft start
  56. Setup Question (do I really need the gain from a preamp)
  57. Your opinions please
  58. design advise
  59. Interpolation Oscillator
  60. audio note oto
  61. A small resonant HV converter: Q-Conv
  62. Iv got a 100w OPT That needs a circuit
  63. Powerful tube amp / unmatched tubes in parallel
  64. Need help: I have 807s and the guts from a HK AA-100
  65. SE EL34 and speakers
  66. 6AK10 LTP with CCS question
  67. Is a heater voltage of 6.7 cause for concern?
  68. Tube guards/cage for Elekit TU-8200
  69. ming da mc 845 aa modification
  70. How good can this headphone amp/pre amp be?
  71. Zero Bias Solution?
  72. Cathode Degeneration with CCS plate load- My Mistake
  73. Pilot 240 with too much bass-- circuit modification needed?
  74. EL34 DIY "centre-tapped" tube ??
  75. Advice for Super Cheap & Simple 829b based amp from spare parts
  76. Infineon IPA50R140CP N-channel mosfet
  77. Borberly Op amp 4 Tube Mosfet hybrid
  78. Splitting Power Supply Choke Question
  79. Toroidal PT as OPT in big power application?
  80. Inrush limiter question
  81. Counterpoint AS-5.1 Tube Type Question
  82. OPT connections
  83. Help teach a CS guy to test a tube amp!
  84. Now THIS is an output transformer
  85. Gas rectifier vs vacuum rectifier
  86. What value for the bias resistor of a SE 6550?
  87. ELL80 tube-Ultralinear mode???
  88. Russian "6L6" ID
  89. Tube amp for a car lol
  90. S5 Electronics Upgrade
  91. Best Tube for SPUD Amp
  92. Zenith 7b31 EL84 Tube Amp Low Volume
  93. Heater cathode elevation
  94. 6K5GT & EL36 AMP
  95. Grid stopper by ECC83
  96. 6L6 Without Screen Drive?
  97. Fusion Postmodernism and tube amps ---- 6SN7 + 26 45
  98. Mullard V.T.52 Push-Pull Tube AMP.
  99. Amp for Magneplaner 1,6/R
  100. Car tube amp- looking for advice
  101. Direct replacement for 5Z3PA and 5Z3P Rectifier
  102. 83 Rectifier
  103. Ground noise and hum: why and how to maybe fix it
  104. How to measure SNR?
  105. Triode vs Pentode cathode followers
  106. Damaged tubes
  107. 2W on 8Ohm OTL amplifier?
  108. EC88 dirver PL84 push-pull,DIY with a picture tells a story.
  109. DC/DC from 12V to 240V@25mA example
  110. the small SE UL ECL 86 / EY 82
  111. 1934 RCA Radio
  112. Recommendations for wiring a Red LED as a pilot lamp
  113. Retensioning UX4 (300b) tube pin socket
  114. Looking for power transformer source - details inside
  115. High voltage delay circuit
  116. op-amp current source
  117. Conrad Johnson ART II Blow-up
  118. Help In Determining Amplifier's Output
  119. Unknown tube identification help?
  120. 6S45P HP-Amp help with tail CCS
  121. shuguang EL84 question
  122. Audioromy FU29 M828A High Pitch Squeal / Whine / Whistle
  123. Unknown ECC-83
  124. 6MN8 connected as one triode
  125. 7247 and 6GF7A in driver circuits
  126. I'm looking for a PPP with el34
  127. Output transformer measurements
  128. Volume control crackles on SET hooked to F4.
  129. EF80 push EL153, DIY with a picture tells a story.
  130. Audioromy m 828 a / 829b FU29 Bias / Balance Help
  131. The zero bias valve
  132. KT61 testing
  133. SET Stereo Amplifier
  134. Klangfilm 408a Output Transformers
  135. Too Large Grid Resistor?
  136. Sound master # 34 tube amp
  137. Echolette M40 Cap job ... now everything sucks
  138. dual coil choke
  139. looking for ML6 tubes
  140. 220V Transformer question
  141. 1 or 2 watt fire resistant metal film resistors
  142. 6GK5 SRPP
  143. Unknown Amplifier - Anyone recognise it
  144. Help me ID a tube?
  145. Triode electronics difficulties
  146. Can anyone ID this car amp trans?
  147. Multi Stage amplifier bandwidth.
  148. Chassis Question
  149. Converting Stereo SE to Parallel SE Monoblock
  150. Just got a Hickok 539B! Have questions!
  151. Can regulated B+ act like a CCS?
  152. Quad II valve matching
  153. Heater Current - per valve or per triode ?
  154. OT for 12AU7 preamp?
  155. Which James output for a Lacewood SE
  156. Help Matching RCA 5692 Tubes
  157. Yet another ECL82 se
  158. Psvane 211-TII ... Pushing them above 75W Pa
  159. Fisher X 100 A restoration questions?
  160. Brook 12A Q
  161. HT voltage for preamp circuit vs output circuit
  162. Please explain this H3 3rd harmonic cancellation
  163. Recommended speaker selector for tube amplifiers?
  164. Should I use a choke?
  165. 12DW7/7427 tube question
  166. philips 228 radiogram
  167. soft start and delay start - help please
  168. Grounding and GFCI circuits
  169. SuperTriode with BJT and MosFet - a good idea?
  170. 6AQ5/6005 12AX7 Amp
  171. Hamlin's 20-20 / Trio w45 : looking for legible schematic
  172. Dynaco PAS 3X - help with an old modification
  173. Power supply 500v
  174. Anyone use 816 mercury vapor 1/2 wave rec tube
  175. Lamm clone
  176. Zobel RC network and stability of GNF SE amplifier
  177. Screen driven 6KD6 SE
  178. Comments about regulators
  179. Rolling 6C33
  180. Crazy B+ Issue???
  181. Psvane EL34PH replica - reliability?
  182. Help designing regulated power supply
  183. Tube wiring guide line
  184. Chassis earth and ground
  185. 7868 to 7591
  186. Maximum Screen Voltage for Triode Strapped 1625 or 837
  187. AT-50 British transmitting triode
  188. Problem with power tubes
  189. A 6Y6 Push Pull amplifier
  190. Testing
  191. 6CG7 Hybrid Tube Headphone Amp
  192. Choke On The Output Of A Tube Amp
  193. 6n3p buffer?
  194. 4P1L vs 4P1S
  195. Moving from 6N16B to 6021/CV3986 in Cayin HA-3
  196. "La Luxuriante" R120 SE amplifier
  197. Tube Headphone Amp Design and Help With Inverse Pre-Distortion Circuit
  198. Looking For Some Help
  199. Audio dummy load
  200. Custom-made transformers in USA
  201. Etude - Amplifier for study
  202. Can you mix glow tubes and zeners for shunt regs?
  203. tubes4hifi - Amplifier Sound, other kits?
  204. Suggest source for inexpensive chassis for tube amp project?
  205. Reverse Tube Regulator?
  206. Leak Stereo 20 Problem
  207. Choke for 6v6 lacewood amp.
  208. Output Tube Options for Scott 399
  209. ST-35 Z565 Output Transformer Troubles?
  210. Point to Point Wiring Tube Preamp
  211. Siamese RG-6
  212. Gz34 rectifier with dc heater
  213. line preamp
  214. A bit of help with my phono preamp
  215. Aikido Cascode Preamp build
  216. Can EL34 replace KT88?
  217. Current Draw of CJ ART??
  218. Square wave overshot=worm sound?
  219. Band pass filter for tube amps
  220. Screen drive and the 6AG9
  221. Cleaning odd potentiometer
  222. Removing a Jolida 502 Balance Control
  223. "The unequal twins" ECC83 / ECC99 Triode and 6N1P / E280F pentode amps
  224. Marantz 8 blowing fuse
  225. A newbie question about 12AX7 tube
  226. Web resources
  227. Transformer Shrouding - Purpose/Effectiveness
  228. current source
  229. KT88 Schematic - please help
  230. Resistors
  231. 105C to 85C Capacitors in Cheap Chinese Preamp
  232. Need help with plate CCS in 6EM7
  233. Need help on replacing Cap on Marantz 8
  234. Transformer for 12ax7 B+ calculation
  235. First amp build, advice and thoughts encouraged!!
  236. Proposed E-Linear PP 6L6GB w/ EL83 LTP - Critique?
  237. Luxman CL36, schematic
  238. Help with input impedance
  239. phono sp16
  240. Looking for a 20W amp schematics
  241. Ruggedized tube construction?
  242. Quicksilver full function preamplifier
  243. Another variants of using PCB from Ebay
  244. Valves very close each other...
  245. HF valve amp?
  246. Eico ST70 construction manual...
  247. Audio Research $30 FET!
  248. value in humour
  249. "rejuvenate" oxide cathode
  250. el84 se amp layout

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