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  1. what kind of resistor is this?
  2. stereo push pull amp one heater supply for power tubes
  3. Building new GU-50 stereo amp...
  4. Tubes and microphonics
  5. 829 or GU-29 audio amplifier schematics?
  6. Electrolytic types...
  7. Consonance t99 schematic/ minimax pre
  8. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  9. Serious case of brain fry. You out there Thorsten?
  10. Upgrading a Beard P100 tubeamp
  11. Tube Amplifier with OT100
  12. bogen m120 schematic
  13. Question about Thorsten's Tube Phono Pre
  14. PP Output Trafo Measurement
  15. push pull balancing
  16. New issue Mullard Tubes
  17. Help on triode
  18. 5 Volt Damper Diodes?
  19. Please help diagnose preamp problem
  20. 6N1/6N3 substitution
  21. Cathode feedback and input impedance
  22. Optimal ripple voltage on b+ supply
  23. Setup suggestion between DAC-AH and ST-70
  24. Simple Low Voltage Tube Preamp?
  25. Anyone built this 100W GEC amp? How is the sound?
  26. Does anyone have VT150 schematic?
  27. Ignition Coil Toobe Amplifier
  28. Voltage swing of Heffa?
  29. All pentode PP amp?
  30. GZ34 anode load resistor calculation - help?
  31. Capacitor choice for attached schematic
  32. The sound of... tubes !
  33. All quiet on the SN front - recommended choice of tubes
  34. Moscode 600 hum/turn off thump
  35. Tube Tester Resto Basics
  36. Marshall 100v 8100U Guitar Amp Hums
  37. What's the simple killer tube amp? Anyone?
  38. Help - CFB in a KT88 SE amp
  39. Any Russian speakers here?
  40. 6av6 Diode use?
  41. Power Supply
  42. Choke rating for choke input duty
  43. drawing a loadline for a power stage EL34 tube.
  44. Experiencing problems to insert tubes
  45. Preamp signal wiring ideas ?
  46. el34PP circuit evaluation!!
  47. "Re-Forming" Caps on Old Tube Amp
  48. Gary Pimm website?
  49. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  50. Audio Research D150 bias setting
  51. Cathodyne phase splitter with CCS?
  52. Has anyone tried 2 x 6550 100W amp?
  53. modelling PSU for Aikido
  54. 27 head phone amp or.??
  55. New Chassis Fabrication Pics and Capacitor Question
  56. Replacing old caps in the SP8 pre-amp
  57. Tube choice for Class A2
  58. hybrid graetz in PSUDII
  59. 6C45P Spud
  60. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  61. Single Ended EL34 Amp
  62. Rp / Rk on Aikido preamp
  63. hum in amp!
  64. Looking for a 83 rectifier model
  65. Advice wanted on ebay SET amps
  66. Resistors for ultralinear-to-triode conversion
  67. Gary Pimm
  68. resistor values for lifting ground AND LED
  69. output transformer impedance choices
  70. Feedback disc recording amp
  71. 6bm8/ECL82 vs EL84
  72. B+ filter caps
  73. (Newbie) CSS Question
  74. 6P15P Tubes: Push Pull Possible?
  75. Tube X-ref list ??
  76. AVO tube tester spares
  77. Add gain before or after the phase splitter?
  78. ping SY: Red Light LED question
  79. Greinacher voltage multiplier
  80. Dead channel
  81. Euphonia is back!
  82. What's the best 417A & 437A?
  83. Eico ST70 OPT / Schematic Question
  84. Is this feasible?
  85. Repairing 805 tubes
  86. jadis defy 7 help
  87. 6n1p Screen
  88. Mc275ce
  89. Are these tubes are the same?
  90. "King of tube(s) for line-stages"
  91. Acoustic Plan PhonoMaster
  92. Heathkit AA-81 schematic
  93. has anyone kept a copy of gpimm's latest self-biasing CCS?
  94. How to wire inductor - s and n
  95. Rogers Cadet III schematics Corrections
  96. Hickok TV-7/U restoration advice needed.
  97. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  98. 24v Aikido for newb.
  99. Powering Up Old Tube Amps/Receivers
  100. preliminary schematic drawing rev.1a
  101. Not a typical MKIII Dynaco.
  102. mosfet buffer for power stage
  103. EI KT-90 news
  104. 304TL based Class A
  105. Purchasing NOS Tubes
  106. tube power supply design resources
  107. High Voltage Regulator Design
  108. max. output for two 5881 tubes?
  109. Excessive current draw in Fender Deville
  110. driving your power stage
  111. Need schematic Cary Audio SLP-70 preamp
  112. Bridge-balanced amplifiers
  113. Tell-tale signs of good feedback usage?
  114. Any mid priced SE transformers around?
  115. Bias resistor
  116. Some sneek peeks
  117. Old radio with 4 pin sockets, info?
  118. need help on pot tapers
  119. A typical KT88 tubes
  120. amplifier for unknown output transformers?
  121. vista audio
  122. CV4014 and 5650 - any audio application of these tubes?
  123. SVP-PRO schematic
  124. Looking for a good source for attenuators
  125. Center-tap to ground?
  126. 6n1p-ev operating points
  127. where to find old pot's with switch built in
  128. Maggie refurb project
  129. Parafeed output
  130. Hirtel junior stereo italian tube amp
  131. power supply help
  132. 7189/7189A Problem
  133. Glow modulation tubes
  134. Transformer Hum leaks to Speakers
  135. EAR Yoshino V20 Amplifier
  136. Repair a tube tester?
  137. starting PP - 6p3s
  138. 6BL7 rA in PP
  139. Why such high plate voltage in 2A3 DRD?
  140. to parafeed or not to parafeed that is the question
  141. Lowering voltage output of transformer
  142. Using EL34 in a line stage
  143. peerless transfomer information
  144. Output transformer design for SS amp
  145. CD source fortube amp
  146. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  147. BIG tube amplifier, two qbl5/3500 tubes
  148. EL34 or 6L6 mono help me please!!
  149. Why don't we use output tubes as cathode followers?
  150. 6C33 driver recommendations
  151. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  152. Minimum Zener Current with Pass Device
  153. Favorite easy 6V6 push-pull circuit?
  154. Tubecad soft-clipping circuit
  155. broskie voltage regulator
  156. E88CC dissipation in Aikido
  157. Magnavox 6BQ5/EL84 and Mr. Gabe
  158. Aikido hum has me stumped !!!!
  159. 5842 and 5842 WA for 300B
  160. Basic tube combination question.
  161. Resistive ps voltage follower
  162. First time DIY tube
  163. Need help with hum and faint left channel on my S5 Electronics kit
  164. grid impedence of paralleled tubes in push pull
  165. Fender Bassman PT Rewind
  166. rectification
  167. 6AU6 Varieties
  168. EMI tubes (British made)
  169. valve wear symptoms?
  170. Standby switch, snap, crackle, pop?
  171. Aikido PSU questions (Bas Boards)
  172. one tube amps
  173. Intermittant Clicking
  174. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  175. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  176. Tube spice models
  177. Audible Illusions Modulus faulty?
  178. Ei Tubes..
  179. more output transformer questions
  180. 6C33 design comments?
  181. Current production EL34
  182. Impedance matching
  183. question about multiple input transformer in same tube mic pre.
  184. One tube preamp
  185. Help 6G-E12A pinout??
  186. DIY Jadis JA 30 power amp PCB
  187. output tube options
  188. wanted: accurate 257 tube tester manual
  189. Developing a "universal" tube power supply PCB
  190. Looking for a Cover....
  191. EL34 Sound
  192. Pinout ECC83 to ECC808
  193. How to convert S5 K-12g kit to dual mono?
  194. EL84 + EF86
  195. Tube amps, power and speaker impedance
  196. How to figure output Z of SRPP?
  197. Rose RV23 preamp
  198. Wanted RIAA stage with 6SN7
  199. Help with PSU Design
  200. Tetrode output stage
  201. New amplifier project -my layout
  202. jadis ja 30
  203. Aikido Attenuator kit question
  204. Fender Delux Reverb AB763
  205. Weird crackling sound without B+ applied
  206. More Aikido questions...........
  207. 6C41C in OTL?
  208. Looking for Voss-Ellis article
  209. 807 E-Linear
  210. ECC86 model
  211. Tube ID & Code Help Needed
  212. PS Decoupling question
  213. Need help in trouble-shooting my AES Sixpacs amp
  214. Space between power tubes
  215. Schematic please? SRPP with current source cathode follower
  216. Series connecting output Transformers.
  217. 6C45-Pi battery RIAA/Pre sugestions?
  218. Good News For EI Tube Fans
  219. My 300B project...
  220. building Single Ended amps
  221. Higher power amps using 807's or 1625's
  222. Project using Eico ST 70 Iron?
  223. M-1 amplifier kit - full documentation in public domain now
  224. Sus tubes ?
  225. Adjusting BIAS
  226. "Shrine" SE Amp using 6AH6 and 1625
  227. MFA Lumi - possible to "un-darken" the sound signature?
  228. Output transformers resistance
  229. Aikido heaters
  230. Return to Aikido Hum issues
  231. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  232. Compare the sound of 6550 amp to a 6L6 amp
  233. Biasing a valve amp
  234. Scoundrel days
  235. Counterpoint SA100 one channel doesn´t work
  236. Hepl me circuit 6h30
  237. 6LR8 Amp Preliminary Questions
  238. Another 6L6 schematic
  239. 6S19P Amplifier
  240. An idea for a PL84 amp with toroidal interstage.
  241. 417A-300B Plate Choke or Interstage Coupled?
  242. Identifying an unknown tube
  243. Looking for EL34 PP Schematic Amp ? at least 35Watt
  244. ADVICE on Valvestate crunch, but all tube instead.
  245. Help diagnosing noise
  246. st70 blowout
  247. Gu81-m
  248. 6c4 pre-amp circuit
  249. 6SN7 6.3 V heater supply
  250. 2C26 &E1148's

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