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  1. Experiencing problems to insert tubes
  2. Preamp signal wiring ideas ?
  3. el34PP circuit evaluation!!
  4. "Re-Forming" Caps on Old Tube Amp
  5. Gary Pimm website?
  6. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  7. Audio Research D150 bias setting
  8. Cathodyne phase splitter with CCS?
  9. Has anyone tried 2 x 6550 100W amp?
  10. modelling PSU for Aikido
  11. 27 head phone amp or.??
  12. New Chassis Fabrication Pics and Capacitor Question
  13. Replacing old caps in the SP8 pre-amp
  14. Tube choice for Class A2
  15. hybrid graetz in PSUDII
  16. 6C45P Spud
  17. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  18. Single Ended EL34 Amp
  19. Rp / Rk on Aikido preamp
  20. hum in amp!
  21. Looking for a 83 rectifier model
  22. Advice wanted on ebay SET amps
  23. Resistors for ultralinear-to-triode conversion
  24. Gary Pimm
  25. resistor values for lifting ground AND LED
  26. output transformer impedance choices
  27. Feedback disc recording amp
  28. 6bm8/ECL82 vs EL84
  29. B+ filter caps
  30. (Newbie) CSS Question
  31. 6P15P Tubes: Push Pull Possible?
  32. Tube X-ref list ??
  33. AVO tube tester spares
  34. Add gain before or after the phase splitter?
  35. ping SY: Red Light LED question
  36. Greinacher voltage multiplier
  37. Dead channel
  38. Euphonia is back!
  39. What's the best 417A & 437A?
  40. Eico ST70 OPT / Schematic Question
  41. Is this feasible?
  42. Repairing 805 tubes
  43. jadis defy 7 help
  44. 6n1p Screen
  45. Mc275ce
  46. Are these tubes are the same?
  47. "King of tube(s) for line-stages"
  48. Acoustic Plan PhonoMaster
  49. Heathkit AA-81 schematic
  50. has anyone kept a copy of gpimm's latest self-biasing CCS?
  51. How to wire inductor - s and n
  52. Rogers Cadet III schematics Corrections
  53. Hickok TV-7/U restoration advice needed.
  54. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  55. 24v Aikido for newb.
  56. Powering Up Old Tube Amps/Receivers
  57. preliminary schematic drawing rev.1a
  58. Not a typical MKIII Dynaco.
  59. mosfet buffer for power stage
  60. EI KT-90 news
  61. 304TL based Class A
  62. Purchasing NOS Tubes
  63. tube power supply design resources
  64. High Voltage Regulator Design
  65. max. output for two 5881 tubes?
  66. Excessive current draw in Fender Deville
  67. driving your power stage
  68. Need schematic Cary Audio SLP-70 preamp
  69. Bridge-balanced amplifiers
  70. Tell-tale signs of good feedback usage?
  71. Any mid priced SE transformers around?
  72. Bias resistor
  73. Some sneek peeks
  74. Old radio with 4 pin sockets, info?
  75. need help on pot tapers
  76. A typical KT88 tubes
  77. amplifier for unknown output transformers?
  78. vista audio
  79. CV4014 and 5650 - any audio application of these tubes?
  80. SVP-PRO schematic
  81. Looking for a good source for attenuators
  82. Center-tap to ground?
  83. 6n1p-ev operating points
  84. where to find old pot's with switch built in
  85. Maggie refurb project
  86. Parafeed output
  87. Hirtel junior stereo italian tube amp
  88. power supply help
  89. 7189/7189A Problem
  90. Glow modulation tubes
  91. Transformer Hum leaks to Speakers
  92. EAR Yoshino V20 Amplifier
  93. Repair a tube tester?
  94. starting PP - 6p3s
  95. 6BL7 rA in PP
  96. Why such high plate voltage in 2A3 DRD?
  97. to parafeed or not to parafeed that is the question
  98. Lowering voltage output of transformer
  99. Using EL34 in a line stage
  100. peerless transfomer information
  101. Output transformer design for SS amp
  102. CD source fortube amp
  103. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  104. BIG tube amplifier, two qbl5/3500 tubes
  105. EL34 or 6L6 mono help me please!!
  106. Why don't we use output tubes as cathode followers?
  107. 6C33 driver recommendations
  108. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  109. Minimum Zener Current with Pass Device
  110. Favorite easy 6V6 push-pull circuit?
  111. Tubecad soft-clipping circuit
  112. broskie voltage regulator
  113. E88CC dissipation in Aikido
  114. Magnavox 6BQ5/EL84 and Mr. Gabe
  115. Aikido hum has me stumped !!!!
  116. 5842 and 5842 WA for 300B
  117. Basic tube combination question.
  118. Resistive ps voltage follower
  119. First time DIY tube
  120. Need help with hum and faint left channel on my S5 Electronics kit
  121. grid impedence of paralleled tubes in push pull
  122. Fender Bassman PT Rewind
  123. rectification
  124. 6AU6 Varieties
  125. EMI tubes (British made)
  126. valve wear symptoms?
  127. Standby switch, snap, crackle, pop?
  128. Aikido PSU questions (Bas Boards)
  129. one tube amps
  130. Intermittant Clicking
  131. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  132. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  133. Tube spice models
  134. Audible Illusions Modulus faulty?
  135. Ei Tubes..
  136. more output transformer questions
  137. 6C33 design comments?
  138. Current production EL34
  139. Impedance matching
  140. question about multiple input transformer in same tube mic pre.
  141. One tube preamp
  142. Help 6G-E12A pinout??
  143. DIY Jadis JA 30 power amp PCB
  144. output tube options
  145. wanted: accurate 257 tube tester manual
  146. Developing a "universal" tube power supply PCB
  147. Looking for a Cover....
  148. EL34 Sound
  149. Pinout ECC83 to ECC808
  150. How to convert S5 K-12g kit to dual mono?
  151. EL84 + EF86
  152. Tube amps, power and speaker impedance
  153. How to figure output Z of SRPP?
  154. Rose RV23 preamp
  155. Wanted RIAA stage with 6SN7
  156. Help with PSU Design
  157. Tetrode output stage
  158. New amplifier project -my layout
  159. jadis ja 30
  160. Aikido Attenuator kit question
  161. Fender Delux Reverb AB763
  162. Weird crackling sound without B+ applied
  163. More Aikido questions...........
  164. 6C41C in OTL?
  165. Looking for Voss-Ellis article
  166. 807 E-Linear
  167. ECC86 model
  168. Tube ID & Code Help Needed
  169. PS Decoupling question
  170. Need help in trouble-shooting my AES Sixpacs amp
  171. Space between power tubes
  172. Schematic please? SRPP with current source cathode follower
  173. Series connecting output Transformers.
  174. 6C45-Pi battery RIAA/Pre sugestions?
  175. Good News For EI Tube Fans
  176. My 300B project...
  177. building Single Ended amps
  178. Higher power amps using 807's or 1625's
  179. Project using Eico ST 70 Iron?
  180. M-1 amplifier kit - full documentation in public domain now
  181. Sus tubes ?
  182. Adjusting BIAS
  183. "Shrine" SE Amp using 6AH6 and 1625
  184. MFA Lumi - possible to "un-darken" the sound signature?
  185. Output transformers resistance
  186. Aikido heaters
  187. Return to Aikido Hum issues
  188. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  189. Compare the sound of 6550 amp to a 6L6 amp
  190. Biasing a valve amp
  191. Scoundrel days
  192. Counterpoint SA100 one channel doesn´t work
  193. Hepl me circuit 6h30
  194. 6LR8 Amp Preliminary Questions
  195. Another 6L6 schematic
  196. 6S19P Amplifier
  197. An idea for a PL84 amp with toroidal interstage.
  198. 417A-300B Plate Choke or Interstage Coupled?
  199. Identifying an unknown tube
  200. Looking for EL34 PP Schematic Amp ? at least 35Watt
  201. ADVICE on Valvestate crunch, but all tube instead.
  202. Help diagnosing noise
  203. st70 blowout
  204. Gu81-m
  205. 6c4 pre-amp circuit
  206. 6SN7 6.3 V heater supply
  207. 2C26 &E1148's
  208. First ECL82 amp probs.
  209. JE Labs ST2A3DX
  210. Punchy 813 Poweramp
  211. Hum in AE K502 or K12m
  212. SE 6SN7 amp....
  213. Audio Innovations 800C schematic or even better service manual?
  214. Music angel amps
  215. Low gain 9-pin tubes for Aikido?
  216. JADIS ORCHESTRA IN PCB (original is hardwire)
  217. Blown Valve in ARC VT50 - help
  218. LAMM ML3 *Signature*
  219. Diode for DC heater
  220. Calculating shunt reg source impedance
  221. Marant 7c preamp diyzone project
  222. PSU Caps for an EL34 SET
  223. high gain 12ax7 preamp from scratch?
  224. IXYS 10M45 chip CCS
  225. Octal Aikido? What tubes?
  226. Tube power supply questions
  227. 6J5 input swing
  228. Checking spice model plate curve accuracy
  229. How many Ohm for triode strapping?
  230. Power supply for Heathkit WA-P2 pre-amplifier
  231. Bogen MX-60a tune-up
  232. dynaco st35 clone problem
  233. Edcor OPT's
  234. ECC40 cascode
  235. Air Vane RIAA Tuning Question
  236. Tube Noob! need help with tubes lots of tubes
  237. bias adjust installation, bogen mo-100a mo 100a quicksilver
  238. 6EM7 Amp
  239. 40mu tube preamp suggestions?
  240. Safe installation of interstage
  241. I've built some amps, need suggestions for a DIY preamp or line stage
  242. CRD diode CCS any good <1mA?
  243. Help fixing a Border Patrol Power Amp
  244. TAD-60 schematics / mods
  245. Selling tube amps
  246. Drd 300b Pse
  247. Hammond Transformer Winding Resistance -- 369GX
  248. The meaning of VA in a TX
  249. Ucl85
  250. Best way to measure cathode follower current

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