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  1. Chinese EL34 amp to modify
  2. GE 97F cap polarity ???
  3. 6C8G phase inverter
  4. Shall I disassemble this ampex for parts?
  5. Power Amp Build from Eico ST70 - Negative Feedback Question
  6. ECC83 cathode grounded = awesome overdrive (?!?!?)
  7. Looking for a Balanced Mic Preamp w 12AX7
  8. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  9. Conrad Johnson PV10L Phono stage DIY
  10. NEW KT66's
  11. Edcor outputs?
  12. Schematic Comment on 'Principles of Power" book ??
  13. what kind of resistor is this?
  14. stereo push pull amp one heater supply for power tubes
  15. Building new GU-50 stereo amp...
  16. Tubes and microphonics
  17. 829 or GU-29 audio amplifier schematics?
  18. Consonance t99 schematic/ minimax pre
  19. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  20. Serious case of brain fry. You out there Thorsten?
  21. Upgrading a Beard P100 tubeamp
  22. Tube Amplifier with OT100
  23. bogen m120 schematic
  24. Question about Thorsten's Tube Phono Pre
  25. PP Output Trafo Measurement
  26. push pull balancing
  27. New issue Mullard Tubes
  28. Help on triode
  29. 5 Volt Damper Diodes?
  30. Please help diagnose preamp problem
  31. 6N1/6N3 substitution
  32. Cathode feedback and input impedance
  33. Optimal ripple voltage on b+ supply
  34. Setup suggestion between DAC-AH and ST-70
  35. Simple Low Voltage Tube Preamp?
  36. Anyone built this 100W GEC amp? How is the sound?
  37. Does anyone have VT150 schematic?
  38. Ignition Coil Toobe Amplifier
  39. Voltage swing of Heffa?
  40. All pentode PP amp?
  41. GZ34 anode load resistor calculation - help?
  42. Capacitor choice for attached schematic
  43. The sound of... tubes !
  44. All quiet on the SN front - recommended choice of tubes
  45. Moscode 600 hum/turn off thump
  46. Tube Tester Resto Basics
  47. What's the simple killer tube amp? Anyone?
  48. Help - CFB in a KT88 SE amp
  49. Any Russian speakers here?
  50. 6av6 Diode use?
  51. Power Supply
  52. Choke rating for choke input duty
  53. drawing a loadline for a power stage EL34 tube.
  54. Experiencing problems to insert tubes
  55. Preamp signal wiring ideas ?
  56. el34PP circuit evaluation!!
  57. "Re-Forming" Caps on Old Tube Amp
  58. Gary Pimm website?
  59. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  60. Audio Research D150 bias setting
  61. Cathodyne phase splitter with CCS?
  62. Has anyone tried 2 x 6550 100W amp?
  63. modelling PSU for Aikido
  64. 27 head phone amp or.??
  65. New Chassis Fabrication Pics and Capacitor Question
  66. Replacing old caps in the SP8 pre-amp
  67. Tube choice for Class A2
  68. hybrid graetz in PSUDII
  69. 6C45P Spud
  70. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  71. Single Ended EL34 Amp
  72. Rp / Rk on Aikido preamp
  73. hum in amp!
  74. Looking for a 83 rectifier model
  75. Advice wanted on ebay SET amps
  76. Resistors for ultralinear-to-triode conversion
  77. Gary Pimm
  78. resistor values for lifting ground AND LED
  79. output transformer impedance choices
  80. Feedback disc recording amp
  81. 6bm8/ECL82 vs EL84
  82. B+ filter caps
  83. (Newbie) CSS Question
  84. 6P15P Tubes: Push Pull Possible?
  85. Tube X-ref list ??
  86. AVO tube tester spares
  87. Add gain before or after the phase splitter?
  88. ping SY: Red Light LED question
  89. Greinacher voltage multiplier
  90. Dead channel
  91. Euphonia is back!
  92. What's the best 417A & 437A?
  93. Eico ST70 OPT / Schematic Question
  94. Is this feasible?
  95. Repairing 805 tubes
  96. jadis defy 7 help
  97. 6n1p Screen
  98. Mc275ce
  99. Are these tubes are the same?
  100. "King of tube(s) for line-stages"
  101. Acoustic Plan PhonoMaster
  102. Heathkit AA-81 schematic
  103. has anyone kept a copy of gpimm's latest self-biasing CCS?
  104. How to wire inductor - s and n
  105. Rogers Cadet III schematics Corrections
  106. Hickok TV-7/U restoration advice needed.
  107. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  108. 24v Aikido for newb.
  109. Powering Up Old Tube Amps/Receivers
  110. preliminary schematic drawing rev.1a
  111. Not a typical MKIII Dynaco.
  112. mosfet buffer for power stage
  113. EI KT-90 news
  114. 304TL based Class A
  115. Purchasing NOS Tubes
  116. tube power supply design resources
  117. High Voltage Regulator Design
  118. max. output for two 5881 tubes?
  119. driving your power stage
  120. Need schematic Cary Audio SLP-70 preamp
  121. Bridge-balanced amplifiers
  122. Tell-tale signs of good feedback usage?
  123. Any mid priced SE transformers around?
  124. Bias resistor
  125. Some sneek peeks
  126. Old radio with 4 pin sockets, info?
  127. need help on pot tapers
  128. A typical KT88 tubes
  129. amplifier for unknown output transformers?
  130. vista audio
  131. CV4014 and 5650 - any audio application of these tubes?
  132. SVP-PRO schematic
  133. Looking for a good source for attenuators
  134. Center-tap to ground?
  135. 6n1p-ev operating points
  136. where to find old pot's with switch built in
  137. Maggie refurb project
  138. Parafeed output
  139. Hirtel junior stereo italian tube amp
  140. power supply help
  141. 7189/7189A Problem
  142. Glow modulation tubes
  143. Transformer Hum leaks to Speakers
  144. EAR Yoshino V20 Amplifier
  145. Repair a tube tester?
  146. starting PP - 6p3s
  147. 6BL7 rA in PP
  148. Why such high plate voltage in 2A3 DRD?
  149. to parafeed or not to parafeed that is the question
  150. Lowering voltage output of transformer
  151. Using EL34 in a line stage
  152. peerless transfomer information
  153. Output transformer design for SS amp
  154. CD source fortube amp
  155. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  156. BIG tube amplifier, two qbl5/3500 tubes
  157. EL34 or 6L6 mono help me please!!
  158. Why don't we use output tubes as cathode followers?
  159. 6C33 driver recommendations
  160. Minimum Zener Current with Pass Device
  161. Favorite easy 6V6 push-pull circuit?
  162. Tubecad soft-clipping circuit
  163. broskie voltage regulator
  164. E88CC dissipation in Aikido
  165. Magnavox 6BQ5/EL84 and Mr. Gabe
  166. Aikido hum has me stumped !!!!
  167. 5842 and 5842 WA for 300B
  168. Basic tube combination question.
  169. Resistive ps voltage follower
  170. First time DIY tube
  171. Need help with hum and faint left channel on my S5 Electronics kit
  172. grid impedence of paralleled tubes in push pull
  173. rectification
  174. 6AU6 Varieties
  175. EMI tubes (British made)
  176. valve wear symptoms?
  177. Standby switch, snap, crackle, pop?
  178. Aikido PSU questions (Bas Boards)
  179. one tube amps
  180. Intermittant Clicking
  181. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  182. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  183. Tube spice models
  184. Audible Illusions Modulus faulty?
  185. Ei Tubes..
  186. more output transformer questions
  187. 6C33 design comments?
  188. Current production EL34
  189. Impedance matching
  190. question about multiple input transformer in same tube mic pre.
  191. One tube preamp
  192. Help 6G-E12A pinout??
  193. DIY Jadis JA 30 power amp PCB
  194. output tube options
  195. wanted: accurate 257 tube tester manual
  196. Developing a "universal" tube power supply PCB
  197. Looking for a Cover....
  198. EL34 Sound
  199. Pinout ECC83 to ECC808
  200. How to convert S5 K-12g kit to dual mono?
  201. EL84 + EF86
  202. Tube amps, power and speaker impedance
  203. How to figure output Z of SRPP?
  204. Rose RV23 preamp
  205. Wanted RIAA stage with 6SN7
  206. Help with PSU Design
  207. Tetrode output stage
  208. New amplifier project -my layout
  209. jadis ja 30
  210. Aikido Attenuator kit question
  211. Weird crackling sound without B+ applied
  212. More Aikido questions...........
  213. 6C41C in OTL?
  214. Looking for Voss-Ellis article
  215. 807 E-Linear
  216. ECC86 model
  217. Tube ID & Code Help Needed
  218. PS Decoupling question
  219. Need help in trouble-shooting my AES Sixpacs amp
  220. Space between power tubes
  221. Schematic please? SRPP with current source cathode follower
  222. Series connecting output Transformers.
  223. 6C45-Pi battery RIAA/Pre sugestions?
  224. Good News For EI Tube Fans
  225. My 300B project...
  226. building Single Ended amps
  227. Higher power amps using 807's or 1625's
  228. Project using Eico ST 70 Iron?
  229. M-1 amplifier kit - full documentation in public domain now
  230. Sus tubes ?
  231. Adjusting BIAS
  232. "Shrine" SE Amp using 6AH6 and 1625
  233. MFA Lumi - possible to "un-darken" the sound signature?
  234. Output transformers resistance
  235. Aikido heaters
  236. Return to Aikido Hum issues
  237. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  238. Compare the sound of 6550 amp to a 6L6 amp
  239. Biasing a valve amp
  240. Scoundrel days
  241. Counterpoint SA100 one channel doesn´t work
  242. Hepl me circuit 6h30
  243. 6LR8 Amp Preliminary Questions
  244. Another 6L6 schematic
  245. 6S19P Amplifier
  246. An idea for a PL84 amp with toroidal interstage.
  247. 417A-300B Plate Choke or Interstage Coupled?
  248. Identifying an unknown tube
  249. Looking for EL34 PP Schematic Amp ? at least 35Watt
  250. Help diagnosing noise

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