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  1. JE Labs / Arnold Cruz 2A3 amp - Q
  2. 5842 grounded grid
  3. Russian RF Double Tetrodes
  4. Opinions or inputs on Altec 1570B amplifiers
  5. Chinese EL34 amp to modify
  6. GE 97F cap polarity ???
  7. 6C8G phase inverter
  8. Shall I disassemble this ampex for parts?
  9. Power Amp Build from Eico ST70 - Negative Feedback Question
  10. ECC83 cathode grounded = awesome overdrive (?!?!?)
  11. Looking for a Balanced Mic Preamp w 12AX7
  12. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  13. Conrad Johnson PV10L Phono stage DIY
  14. NEW KT66's
  15. Edcor outputs?
  16. Schematic Comment on 'Principles of Power" book ??
  17. what kind of resistor is this?
  18. stereo push pull amp one heater supply for power tubes
  19. Building new GU-50 stereo amp...
  20. Tubes and microphonics
  21. 829 or GU-29 audio amplifier schematics?
  22. Electrolytic types...
  23. Consonance t99 schematic/ minimax pre
  24. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  25. Serious case of brain fry. You out there Thorsten?
  26. Upgrading a Beard P100 tubeamp
  27. Tube Amplifier with OT100
  28. bogen m120 schematic
  29. Question about Thorsten's Tube Phono Pre
  30. PP Output Trafo Measurement
  31. push pull balancing
  32. New issue Mullard Tubes
  33. Help on triode
  34. 5 Volt Damper Diodes?
  35. Please help diagnose preamp problem
  36. 6N1/6N3 substitution
  37. Cathode feedback and input impedance
  38. Optimal ripple voltage on b+ supply
  39. Setup suggestion between DAC-AH and ST-70
  40. Simple Low Voltage Tube Preamp?
  41. Anyone built this 100W GEC amp? How is the sound?
  42. Does anyone have VT150 schematic?
  43. Ignition Coil Toobe Amplifier
  44. Voltage swing of Heffa?
  45. All pentode PP amp?
  46. GZ34 anode load resistor calculation - help?
  47. Capacitor choice for attached schematic
  48. The sound of... tubes !
  49. All quiet on the SN front - recommended choice of tubes
  50. Moscode 600 hum/turn off thump
  51. Tube Tester Resto Basics
  52. Marshall 100v 8100U Guitar Amp Hums
  53. What's the simple killer tube amp? Anyone?
  54. Help - CFB in a KT88 SE amp
  55. Any Russian speakers here?
  56. 6av6 Diode use?
  57. Power Supply
  58. Choke rating for choke input duty
  59. drawing a loadline for a power stage EL34 tube.
  60. Experiencing problems to insert tubes
  61. Preamp signal wiring ideas ?
  62. el34PP circuit evaluation!!
  63. "Re-Forming" Caps on Old Tube Amp
  64. Gary Pimm website?
  65. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  66. Audio Research D150 bias setting
  67. Cathodyne phase splitter with CCS?
  68. Has anyone tried 2 x 6550 100W amp?
  69. modelling PSU for Aikido
  70. 27 head phone amp or.??
  71. New Chassis Fabrication Pics and Capacitor Question
  72. Replacing old caps in the SP8 pre-amp
  73. Tube choice for Class A2
  74. hybrid graetz in PSUDII
  75. 6C45P Spud
  76. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  77. Single Ended EL34 Amp
  78. Rp / Rk on Aikido preamp
  79. hum in amp!
  80. Looking for a 83 rectifier model
  81. Advice wanted on ebay SET amps
  82. Resistors for ultralinear-to-triode conversion
  83. Gary Pimm
  84. resistor values for lifting ground AND LED
  85. output transformer impedance choices
  86. Feedback disc recording amp
  87. 6bm8/ECL82 vs EL84
  88. B+ filter caps
  89. (Newbie) CSS Question
  90. 6P15P Tubes: Push Pull Possible?
  91. Tube X-ref list ??
  92. AVO tube tester spares
  93. Add gain before or after the phase splitter?
  94. ping SY: Red Light LED question
  95. Greinacher voltage multiplier
  96. Dead channel
  97. Euphonia is back!
  98. What's the best 417A & 437A?
  99. Eico ST70 OPT / Schematic Question
  100. Is this feasible?
  101. Repairing 805 tubes
  102. jadis defy 7 help
  103. 6n1p Screen
  104. Mc275ce
  105. Are these tubes are the same?
  106. "King of tube(s) for line-stages"
  107. Acoustic Plan PhonoMaster
  108. Heathkit AA-81 schematic
  109. has anyone kept a copy of gpimm's latest self-biasing CCS?
  110. How to wire inductor - s and n
  111. Rogers Cadet III schematics Corrections
  112. Hickok TV-7/U restoration advice needed.
  113. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  114. 24v Aikido for newb.
  115. Powering Up Old Tube Amps/Receivers
  116. preliminary schematic drawing rev.1a
  117. Not a typical MKIII Dynaco.
  118. mosfet buffer for power stage
  119. EI KT-90 news
  120. 304TL based Class A
  121. Purchasing NOS Tubes
  122. tube power supply design resources
  123. High Voltage Regulator Design
  124. max. output for two 5881 tubes?
  125. Excessive current draw in Fender Deville
  126. driving your power stage
  127. Need schematic Cary Audio SLP-70 preamp
  128. Bridge-balanced amplifiers
  129. Tell-tale signs of good feedback usage?
  130. Any mid priced SE transformers around?
  131. Bias resistor
  132. Some sneek peeks
  133. Old radio with 4 pin sockets, info?
  134. need help on pot tapers
  135. A typical KT88 tubes
  136. amplifier for unknown output transformers?
  137. vista audio
  138. CV4014 and 5650 - any audio application of these tubes?
  139. SVP-PRO schematic
  140. Looking for a good source for attenuators
  141. Center-tap to ground?
  142. 6n1p-ev operating points
  143. where to find old pot's with switch built in
  144. Maggie refurb project
  145. Parafeed output
  146. Hirtel junior stereo italian tube amp
  147. power supply help
  148. 7189/7189A Problem
  149. Glow modulation tubes
  150. Transformer Hum leaks to Speakers
  151. EAR Yoshino V20 Amplifier
  152. Repair a tube tester?
  153. starting PP - 6p3s
  154. 6BL7 rA in PP
  155. Why such high plate voltage in 2A3 DRD?
  156. to parafeed or not to parafeed that is the question
  157. Lowering voltage output of transformer
  158. Using EL34 in a line stage
  159. peerless transfomer information
  160. Output transformer design for SS amp
  161. CD source fortube amp
  162. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  163. BIG tube amplifier, two qbl5/3500 tubes
  164. EL34 or 6L6 mono help me please!!
  165. Why don't we use output tubes as cathode followers?
  166. 6C33 driver recommendations
  167. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  168. Minimum Zener Current with Pass Device
  169. Favorite easy 6V6 push-pull circuit?
  170. Tubecad soft-clipping circuit
  171. broskie voltage regulator
  172. E88CC dissipation in Aikido
  173. Magnavox 6BQ5/EL84 and Mr. Gabe
  174. Aikido hum has me stumped !!!!
  175. 5842 and 5842 WA for 300B
  176. Basic tube combination question.
  177. Resistive ps voltage follower
  178. First time DIY tube
  179. Need help with hum and faint left channel on my S5 Electronics kit
  180. grid impedence of paralleled tubes in push pull
  181. Fender Bassman PT Rewind
  182. rectification
  183. 6AU6 Varieties
  184. EMI tubes (British made)
  185. valve wear symptoms?
  186. Standby switch, snap, crackle, pop?
  187. Aikido PSU questions (Bas Boards)
  188. one tube amps
  189. Intermittant Clicking
  190. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  191. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  192. Tube spice models
  193. Audible Illusions Modulus faulty?
  194. Ei Tubes..
  195. more output transformer questions
  196. 6C33 design comments?
  197. Current production EL34
  198. Impedance matching
  199. question about multiple input transformer in same tube mic pre.
  200. One tube preamp
  201. Help 6G-E12A pinout??
  202. DIY Jadis JA 30 power amp PCB
  203. output tube options
  204. wanted: accurate 257 tube tester manual
  205. Developing a "universal" tube power supply PCB
  206. Looking for a Cover....
  207. EL34 Sound
  208. Pinout ECC83 to ECC808
  209. How to convert S5 K-12g kit to dual mono?
  210. EL84 + EF86
  211. Tube amps, power and speaker impedance
  212. How to figure output Z of SRPP?
  213. Rose RV23 preamp
  214. Wanted RIAA stage with 6SN7
  215. Help with PSU Design
  216. Tetrode output stage
  217. New amplifier project -my layout
  218. jadis ja 30
  219. Aikido Attenuator kit question
  220. Fender Delux Reverb AB763
  221. Weird crackling sound without B+ applied
  222. More Aikido questions...........
  223. 6C41C in OTL?
  224. Looking for Voss-Ellis article
  225. 807 E-Linear
  226. ECC86 model
  227. Tube ID & Code Help Needed
  228. PS Decoupling question
  229. Need help in trouble-shooting my AES Sixpacs amp
  230. Space between power tubes
  231. Schematic please? SRPP with current source cathode follower
  232. Series connecting output Transformers.
  233. 6C45-Pi battery RIAA/Pre sugestions?
  234. Good News For EI Tube Fans
  235. My 300B project...
  236. building Single Ended amps
  237. Higher power amps using 807's or 1625's
  238. Project using Eico ST 70 Iron?
  239. M-1 amplifier kit - full documentation in public domain now
  240. Sus tubes ?
  241. Adjusting BIAS
  242. "Shrine" SE Amp using 6AH6 and 1625
  243. MFA Lumi - possible to "un-darken" the sound signature?
  244. Output transformers resistance
  245. Aikido heaters
  246. Return to Aikido Hum issues
  247. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  248. Compare the sound of 6550 amp to a 6L6 amp
  249. Biasing a valve amp
  250. Scoundrel days

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