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  1. Russian 635P?
  2. Swinging Choke or Smoothing Choke
  3. Amp de-bugging
  4. SMPS for B+ from PC PS
  5. Placement of tone stacks
  6. Rectify AC to DC for heating
  7. KT88 in class B
  8. 6FE5 Ultralinear?
  9. OPT -the good, the bad or the ugly ??
  10. Switching power supply for tube-pre
  11. Using a zener to drop plate+screen voltages
  12. Will this circuit work?
  13. Ei 6CW5, any users?
  14. Simple tube preamp?
  15. push-pull and primary impedance
  16. DIY : SWR Interstellar OverDrive (bass preamp)
  17. sound valves m-40 schematics
  18. series connection of filament in push pull output stage
  19. Has anybody built this amp?
  20. Red Light District Amp Screen Reg
  21. AEG rectifier
  22. Gm emulator for calibration
  23. Greetings and a couple of questions
  24. Tubes in a chip amp power stage??
  25. Yaqin MC-10L Preamp Tubes
  26. Sound of paralleld EL84
  27. Preamp Question
  28. WTH -- UL back to triode connection
  29. $139 tube amp but cant remember where i saw it...
  30. better 6au6 alternative
  31. type 40 triode curves
  32. Cap size for Hg Rectifiers
  33. Anybody have experience building an OTL amp?
  34. measuring hum
  35. Nytone SA2000
  36. Inter stage iron in High End
  37. very peculiar psu problem
  38. 12A6 Healthkit A7 Amp
  39. testing a 13E1
  40. JE Labs / Arnold Cruz 2A3 amp - Q
  41. 5842 grounded grid
  42. Russian RF Double Tetrodes
  43. Opinions or inputs on Altec 1570B amplifiers
  44. Chinese EL34 amp to modify
  45. GE 97F cap polarity ???
  46. 6C8G phase inverter
  47. Shall I disassemble this ampex for parts?
  48. Power Amp Build from Eico ST70 - Negative Feedback Question
  49. ECC83 cathode grounded = awesome overdrive (?!?!?)
  50. Looking for a Balanced Mic Preamp w 12AX7
  51. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  52. Conrad Johnson PV10L Phono stage DIY
  53. NEW KT66's
  54. Edcor outputs?
  55. Schematic Comment on 'Principles of Power" book ??
  56. stereo push pull amp one heater supply for power tubes
  57. Building new GU-50 stereo amp...
  58. Tubes and microphonics
  59. 829 or GU-29 audio amplifier schematics?
  60. Consonance t99 schematic/ minimax pre
  61. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  62. Serious case of brain fry. You out there Thorsten?
  63. Upgrading a Beard P100 tubeamp
  64. Tube Amplifier with OT100
  65. bogen m120 schematic
  66. Question about Thorsten's Tube Phono Pre
  67. PP Output Trafo Measurement
  68. push pull balancing
  69. New issue Mullard Tubes
  70. Help on triode
  71. 5 Volt Damper Diodes?
  72. Please help diagnose preamp problem
  73. 6N1/6N3 substitution
  74. Cathode feedback and input impedance
  75. Optimal ripple voltage on b+ supply
  76. Setup suggestion between DAC-AH and ST-70
  77. Simple Low Voltage Tube Preamp?
  78. Anyone built this 100W GEC amp? How is the sound?
  79. Does anyone have VT150 schematic?
  80. Ignition Coil Toobe Amplifier
  81. Voltage swing of Heffa?
  82. All pentode PP amp?
  83. GZ34 anode load resistor calculation - help?
  84. Capacitor choice for attached schematic
  85. The sound of... tubes !
  86. All quiet on the SN front - recommended choice of tubes
  87. Moscode 600 hum/turn off thump
  88. Tube Tester Resto Basics
  89. What's the simple killer tube amp? Anyone?
  90. Help - CFB in a KT88 SE amp
  91. Any Russian speakers here?
  92. 6av6 Diode use?
  93. Power Supply
  94. Choke rating for choke input duty
  95. drawing a loadline for a power stage EL34 tube.
  96. Experiencing problems to insert tubes
  97. Preamp signal wiring ideas ?
  98. el34PP circuit evaluation!!
  99. "Re-Forming" Caps on Old Tube Amp
  100. Gary Pimm website?
  101. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  102. Audio Research D150 bias setting
  103. Cathodyne phase splitter with CCS?
  104. Has anyone tried 2 x 6550 100W amp?
  105. modelling PSU for Aikido
  106. 27 head phone amp or.??
  107. New Chassis Fabrication Pics and Capacitor Question
  108. Replacing old caps in the SP8 pre-amp
  109. Tube choice for Class A2
  110. hybrid graetz in PSUDII
  111. 6C45P Spud
  112. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  113. Single Ended EL34 Amp
  114. Rp / Rk on Aikido preamp
  115. hum in amp!
  116. Looking for a 83 rectifier model
  117. Advice wanted on ebay SET amps
  118. Resistors for ultralinear-to-triode conversion
  119. Gary Pimm
  120. resistor values for lifting ground AND LED
  121. output transformer impedance choices
  122. Feedback disc recording amp
  123. 6bm8/ECL82 vs EL84
  124. B+ filter caps
  125. (Newbie) CSS Question
  126. 6P15P Tubes: Push Pull Possible?
  127. Tube X-ref list ??
  128. AVO tube tester spares
  129. Add gain before or after the phase splitter?
  130. ping SY: Red Light LED question
  131. Greinacher voltage multiplier
  132. Dead channel
  133. Euphonia is back!
  134. What's the best 417A & 437A?
  135. Eico ST70 OPT / Schematic Question
  136. Is this feasible?
  137. Repairing 805 tubes
  138. jadis defy 7 help
  139. 6n1p Screen
  140. Mc275ce
  141. Are these tubes are the same?
  142. "King of tube(s) for line-stages"
  143. Acoustic Plan PhonoMaster
  144. Heathkit AA-81 schematic
  145. has anyone kept a copy of gpimm's latest self-biasing CCS?
  146. How to wire inductor - s and n
  147. Rogers Cadet III schematics Corrections
  148. Hickok TV-7/U restoration advice needed.
  149. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  150. 24v Aikido for newb.
  151. Powering Up Old Tube Amps/Receivers
  152. preliminary schematic drawing rev.1a
  153. Not a typical MKIII Dynaco.
  154. mosfet buffer for power stage
  155. EI KT-90 news
  156. 304TL based Class A
  157. Purchasing NOS Tubes
  158. tube power supply design resources
  159. High Voltage Regulator Design
  160. max. output for two 5881 tubes?
  161. driving your power stage
  162. Need schematic Cary Audio SLP-70 preamp
  163. Bridge-balanced amplifiers
  164. Tell-tale signs of good feedback usage?
  165. Any mid priced SE transformers around?
  166. Bias resistor
  167. Some sneek peeks
  168. Old radio with 4 pin sockets, info?
  169. need help on pot tapers
  170. A typical KT88 tubes
  171. amplifier for unknown output transformers?
  172. vista audio
  173. CV4014 and 5650 - any audio application of these tubes?
  174. SVP-PRO schematic
  175. Looking for a good source for attenuators
  176. Center-tap to ground?
  177. 6n1p-ev operating points
  178. where to find old pot's with switch built in
  179. Maggie refurb project
  180. Parafeed output
  181. Hirtel junior stereo italian tube amp
  182. power supply help
  183. 7189/7189A Problem
  184. Glow modulation tubes
  185. Transformer Hum leaks to Speakers
  186. EAR Yoshino V20 Amplifier
  187. Repair a tube tester?
  188. starting PP - 6p3s
  189. 6BL7 rA in PP
  190. Why such high plate voltage in 2A3 DRD?
  191. to parafeed or not to parafeed that is the question
  192. Lowering voltage output of transformer
  193. Using EL34 in a line stage
  194. peerless transfomer information
  195. Output transformer design for SS amp
  196. CD source fortube amp
  197. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  198. BIG tube amplifier, two qbl5/3500 tubes
  199. EL34 or 6L6 mono help me please!!
  200. Why don't we use output tubes as cathode followers?
  201. 6C33 driver recommendations
  202. Minimum Zener Current with Pass Device
  203. Favorite easy 6V6 push-pull circuit?
  204. Tubecad soft-clipping circuit
  205. broskie voltage regulator
  206. E88CC dissipation in Aikido
  207. Magnavox 6BQ5/EL84 and Mr. Gabe
  208. Aikido hum has me stumped !!!!
  209. 5842 and 5842 WA for 300B
  210. Basic tube combination question.
  211. Resistive ps voltage follower
  212. First time DIY tube
  213. Need help with hum and faint left channel on my S5 Electronics kit
  214. grid impedence of paralleled tubes in push pull
  215. rectification
  216. 6AU6 Varieties
  217. EMI tubes (British made)
  218. valve wear symptoms?
  219. Standby switch, snap, crackle, pop?
  220. Aikido PSU questions (Bas Boards)
  221. one tube amps
  222. Intermittant Clicking
  223. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  224. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  225. Tube spice models
  226. Audible Illusions Modulus faulty?
  227. Ei Tubes..
  228. more output transformer questions
  229. 6C33 design comments?
  230. Current production EL34
  231. Impedance matching
  232. question about multiple input transformer in same tube mic pre.
  233. One tube preamp
  234. Help 6G-E12A pinout??
  235. DIY Jadis JA 30 power amp PCB
  236. output tube options
  237. wanted: accurate 257 tube tester manual
  238. Developing a "universal" tube power supply PCB
  239. Looking for a Cover....
  240. EL34 Sound
  241. Pinout ECC83 to ECC808
  242. How to convert S5 K-12g kit to dual mono?
  243. EL84 + EF86
  244. Tube amps, power and speaker impedance
  245. How to figure output Z of SRPP?
  246. Rose RV23 preamp
  247. Wanted RIAA stage with 6SN7
  248. Help with PSU Design
  249. Tetrode output stage
  250. New amplifier project -my layout

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