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  1. Setup suggestion between DAC-AH and ST-70
  2. Simple Low Voltage Tube Preamp?
  3. Anyone built this 100W GEC amp? How is the sound?
  4. Does anyone have VT150 schematic?
  5. Ignition Coil Toobe Amplifier
  6. Voltage swing of Heffa?
  7. All pentode PP amp?
  8. GZ34 anode load resistor calculation - help?
  9. Capacitor choice for attached schematic
  10. The sound of... tubes !
  11. All quiet on the SN front - recommended choice of tubes
  12. Moscode 600 hum/turn off thump
  13. Tube Tester Resto Basics
  14. Marshall 100v 8100U Guitar Amp Hums
  15. What's the simple killer tube amp? Anyone?
  16. Help - CFB in a KT88 SE amp
  17. Any Russian speakers here?
  18. 6av6 Diode use?
  19. Power Supply
  20. Choke rating for choke input duty
  21. drawing a loadline for a power stage EL34 tube.
  22. Experiencing problems to insert tubes
  23. Preamp signal wiring ideas ?
  24. el34PP circuit evaluation!!
  25. "Re-Forming" Caps on Old Tube Amp
  26. Gary Pimm website?
  27. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  28. Audio Research D150 bias setting
  29. Cathodyne phase splitter with CCS?
  30. Has anyone tried 2 x 6550 100W amp?
  31. modelling PSU for Aikido
  32. 27 head phone amp or.??
  33. New Chassis Fabrication Pics and Capacitor Question
  34. Replacing old caps in the SP8 pre-amp
  35. Tube choice for Class A2
  36. hybrid graetz in PSUDII
  37. 6C45P Spud
  38. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  39. Single Ended EL34 Amp
  40. Rp / Rk on Aikido preamp
  41. hum in amp!
  42. Looking for a 83 rectifier model
  43. Advice wanted on ebay SET amps
  44. Resistors for ultralinear-to-triode conversion
  45. Gary Pimm
  46. resistor values for lifting ground AND LED
  47. output transformer impedance choices
  48. Feedback disc recording amp
  49. 6bm8/ECL82 vs EL84
  50. B+ filter caps
  51. (Newbie) CSS Question
  52. 6P15P Tubes: Push Pull Possible?
  53. Tube X-ref list ??
  54. AVO tube tester spares
  55. Add gain before or after the phase splitter?
  56. ping SY: Red Light LED question
  57. Greinacher voltage multiplier
  58. Dead channel
  59. Euphonia is back!
  60. What's the best 417A & 437A?
  61. Eico ST70 OPT / Schematic Question
  62. Is this feasible?
  63. Repairing 805 tubes
  64. jadis defy 7 help
  65. 6n1p Screen
  66. Mc275ce
  67. Are these tubes are the same?
  68. "King of tube(s) for line-stages"
  69. Acoustic Plan PhonoMaster
  70. Heathkit AA-81 schematic
  71. has anyone kept a copy of gpimm's latest self-biasing CCS?
  72. How to wire inductor - s and n
  73. Rogers Cadet III schematics Corrections
  74. Hickok TV-7/U restoration advice needed.
  75. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  76. 24v Aikido for newb.
  77. Powering Up Old Tube Amps/Receivers
  78. preliminary schematic drawing rev.1a
  79. Not a typical MKIII Dynaco.
  80. mosfet buffer for power stage
  81. 304TL based Class A
  82. EI KT-90 news
  83. Purchasing NOS Tubes
  84. tube power supply design resources
  85. High Voltage Regulator Design
  86. max. output for two 5881 tubes?
  87. Excessive current draw in Fender Deville
  88. driving your power stage
  89. Need schematic Cary Audio SLP-70 preamp
  90. Bridge-balanced amplifiers
  91. Tell-tale signs of good feedback usage?
  92. Any mid priced SE transformers around?
  93. Bias resistor
  94. Some sneek peeks
  95. Old radio with 4 pin sockets, info?
  96. need help on pot tapers
  97. A typical KT88 tubes
  98. amplifier for unknown output transformers?
  99. vista audio
  100. CV4014 and 5650 - any audio application of these tubes?
  101. SVP-PRO schematic
  102. Looking for a good source for attenuators
  103. Center-tap to ground?
  104. 6n1p-ev operating points
  105. where to find old pot's with switch built in
  106. Maggie refurb project
  107. Parafeed output
  108. Hirtel junior stereo italian tube amp
  109. power supply help
  110. 7189/7189A Problem
  111. Glow modulation tubes
  112. Transformer Hum leaks to Speakers
  113. EAR Yoshino V20 Amplifier
  114. Repair a tube tester?
  115. starting PP - 6p3s
  116. 6BL7 rA in PP
  117. Why such high plate voltage in 2A3 DRD?
  118. to parafeed or not to parafeed that is the question
  119. Lowering voltage output of transformer
  120. Using EL34 in a line stage
  121. peerless transfomer information
  122. Output transformer design for SS amp
  123. CD source fortube amp
  124. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  125. BIG tube amplifier, two qbl5/3500 tubes
  126. EL34 or 6L6 mono help me please!!
  127. Why don't we use output tubes as cathode followers?
  128. 6C33 driver recommendations
  129. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  130. Minimum Zener Current with Pass Device
  131. Favorite easy 6V6 push-pull circuit?
  132. Tubecad soft-clipping circuit
  133. broskie voltage regulator
  134. E88CC dissipation in Aikido
  135. Magnavox 6BQ5/EL84 and Mr. Gabe
  136. Aikido hum has me stumped !!!!
  137. 5842 and 5842 WA for 300B
  138. Basic tube combination question.
  139. Resistive ps voltage follower
  140. First time DIY tube
  141. Need help with hum and faint left channel on my S5 Electronics kit
  142. grid impedence of paralleled tubes in push pull
  143. Fender Bassman PT Rewind
  144. rectification
  145. 6AU6 Varieties
  146. EMI tubes (British made)
  147. valve wear symptoms?
  148. Standby switch, snap, crackle, pop?
  149. Aikido PSU questions (Bas Boards)
  150. one tube amps
  151. Intermittant Clicking
  152. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  153. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  154. Tube spice models
  155. Audible Illusions Modulus faulty?
  156. Ei Tubes..
  157. more output transformer questions
  158. 6C33 design comments?
  159. Current production EL34
  160. Impedance matching
  161. question about multiple input transformer in same tube mic pre.
  162. One tube preamp
  163. Help 6G-E12A pinout??
  164. DIY Jadis JA 30 power amp PCB
  165. output tube options
  166. wanted: accurate 257 tube tester manual
  167. Developing a "universal" tube power supply PCB
  168. Looking for a Cover....
  169. EL34 Sound
  170. Pinout ECC83 to ECC808
  171. How to convert S5 K-12g kit to dual mono?
  172. EL84 + EF86
  173. Tube amps, power and speaker impedance
  174. How to figure output Z of SRPP?
  175. Rose RV23 preamp
  176. Wanted RIAA stage with 6SN7
  177. Help with PSU Design
  178. Tetrode output stage
  179. New amplifier project -my layout
  180. jadis ja 30
  181. Aikido Attenuator kit question
  182. Fender Delux Reverb AB763
  183. Weird crackling sound without B+ applied
  184. More Aikido questions...........
  185. 6C41C in OTL?
  186. Looking for Voss-Ellis article
  187. 807 E-Linear
  188. ECC86 model
  189. Tube ID & Code Help Needed
  190. PS Decoupling question
  191. Need help in trouble-shooting my AES Sixpacs amp
  192. Space between power tubes
  193. Schematic please? SRPP with current source cathode follower
  194. Series connecting output Transformers.
  195. 6C45-Pi battery RIAA/Pre sugestions?
  196. Good News For EI Tube Fans
  197. My 300B project...
  198. building Single Ended amps
  199. Higher power amps using 807's or 1625's
  200. Project using Eico ST 70 Iron?
  201. M-1 amplifier kit - full documentation in public domain now
  202. Sus tubes ?
  203. Adjusting BIAS
  204. "Shrine" SE Amp using 6AH6 and 1625
  205. MFA Lumi - possible to "un-darken" the sound signature?
  206. Output transformers resistance
  207. Aikido heaters
  208. Return to Aikido Hum issues
  209. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  210. Compare the sound of 6550 amp to a 6L6 amp
  211. Biasing a valve amp
  212. Scoundrel days
  213. Counterpoint SA100 one channel doesn´t work
  214. Hepl me circuit 6h30
  215. 6LR8 Amp Preliminary Questions
  216. Another 6L6 schematic
  217. 6S19P Amplifier
  218. An idea for a PL84 amp with toroidal interstage.
  219. 417A-300B Plate Choke or Interstage Coupled?
  220. Identifying an unknown tube
  221. Looking for EL34 PP Schematic Amp ? at least 35Watt
  222. ADVICE on Valvestate crunch, but all tube instead.
  223. Help diagnosing noise
  224. st70 blowout
  225. Gu81-m
  226. 6c4 pre-amp circuit
  227. 6SN7 6.3 V heater supply
  228. 2C26 &E1148's
  229. First ECL82 amp probs.
  230. JE Labs ST2A3DX
  231. Punchy 813 Poweramp
  232. Hum in AE K502 or K12m
  233. SE 6SN7 amp....
  234. Audio Innovations 800C schematic or even better service manual?
  235. Music angel amps
  236. Low gain 9-pin tubes for Aikido?
  237. JADIS ORCHESTRA IN PCB (original is hardwire)
  238. Blown Valve in ARC VT50 - help
  239. LAMM ML3 *Signature*
  240. Diode for DC heater
  241. Calculating shunt reg source impedance
  242. Marant 7c preamp diyzone project
  243. PSU Caps for an EL34 SET
  244. high gain 12ax7 preamp from scratch?
  245. IXYS 10M45 chip CCS
  246. Octal Aikido? What tubes?
  247. Tube power supply questions
  248. 6J5 input swing
  249. Checking spice model plate curve accuracy
  250. How many Ohm for triode strapping?

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