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  1. WTH -- UL back to triode connection
  2. $139 tube amp but cant remember where i saw it...
  3. better 6au6 alternative
  4. type 40 triode curves
  5. Cap size for Hg Rectifiers
  6. Anybody have experience building an OTL amp?
  7. measuring hum
  8. Nytone SA2000
  9. Inter stage iron in High End
  10. very peculiar psu problem
  11. 12A6 Healthkit A7 Amp
  12. testing a 13E1
  13. JE Labs / Arnold Cruz 2A3 amp - Q
  14. 5842 grounded grid
  15. Russian RF Double Tetrodes
  16. Opinions or inputs on Altec 1570B amplifiers
  17. Chinese EL34 amp to modify
  18. GE 97F cap polarity ???
  19. 6C8G phase inverter
  20. Shall I disassemble this ampex for parts?
  21. Power Amp Build from Eico ST70 - Negative Feedback Question
  22. ECC83 cathode grounded = awesome overdrive (?!?!?)
  23. Looking for a Balanced Mic Preamp w 12AX7
  24. Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic?
  25. Conrad Johnson PV10L Phono stage DIY
  26. NEW KT66's
  27. Edcor outputs?
  28. Schematic Comment on 'Principles of Power" book ??
  29. what kind of resistor is this?
  30. stereo push pull amp one heater supply for power tubes
  31. Building new GU-50 stereo amp...
  32. Tubes and microphonics
  33. 829 or GU-29 audio amplifier schematics?
  34. Electrolytic types...
  35. Consonance t99 schematic/ minimax pre
  36. Useful Supplier of Transformers, Chokes, Chassis and other stuff
  37. Serious case of brain fry. You out there Thorsten?
  38. Upgrading a Beard P100 tubeamp
  39. Tube Amplifier with OT100
  40. bogen m120 schematic
  41. Question about Thorsten's Tube Phono Pre
  42. PP Output Trafo Measurement
  43. push pull balancing
  44. New issue Mullard Tubes
  45. Help on triode
  46. 5 Volt Damper Diodes?
  47. Please help diagnose preamp problem
  48. 6N1/6N3 substitution
  49. Cathode feedback and input impedance
  50. Optimal ripple voltage on b+ supply
  51. Setup suggestion between DAC-AH and ST-70
  52. Simple Low Voltage Tube Preamp?
  53. Anyone built this 100W GEC amp? How is the sound?
  54. Does anyone have VT150 schematic?
  55. Ignition Coil Toobe Amplifier
  56. Voltage swing of Heffa?
  57. All pentode PP amp?
  58. GZ34 anode load resistor calculation - help?
  59. Capacitor choice for attached schematic
  60. The sound of... tubes !
  61. All quiet on the SN front - recommended choice of tubes
  62. Moscode 600 hum/turn off thump
  63. Tube Tester Resto Basics
  64. Marshall 100v 8100U Guitar Amp Hums
  65. What's the simple killer tube amp? Anyone?
  66. Help - CFB in a KT88 SE amp
  67. Any Russian speakers here?
  68. 6av6 Diode use?
  69. Power Supply
  70. Choke rating for choke input duty
  71. drawing a loadline for a power stage EL34 tube.
  72. Experiencing problems to insert tubes
  73. Preamp signal wiring ideas ?
  74. el34PP circuit evaluation!!
  75. "Re-Forming" Caps on Old Tube Amp
  76. Gary Pimm website?
  77. Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request.
  78. Audio Research D150 bias setting
  79. Cathodyne phase splitter with CCS?
  80. Has anyone tried 2 x 6550 100W amp?
  81. modelling PSU for Aikido
  82. 27 head phone amp or.??
  83. New Chassis Fabrication Pics and Capacitor Question
  84. Replacing old caps in the SP8 pre-amp
  85. Tube choice for Class A2
  86. hybrid graetz in PSUDII
  87. 6C45P Spud
  88. Philips ECG 12AX7WA or GE 5751 ?? Opinions, please.
  89. Single Ended EL34 Amp
  90. Rp / Rk on Aikido preamp
  91. hum in amp!
  92. Looking for a 83 rectifier model
  93. Advice wanted on ebay SET amps
  94. Resistors for ultralinear-to-triode conversion
  95. Gary Pimm
  96. resistor values for lifting ground AND LED
  97. output transformer impedance choices
  98. Feedback disc recording amp
  99. 6bm8/ECL82 vs EL84
  100. B+ filter caps
  101. (Newbie) CSS Question
  102. 6P15P Tubes: Push Pull Possible?
  103. Tube X-ref list ??
  104. AVO tube tester spares
  105. Add gain before or after the phase splitter?
  106. ping SY: Red Light LED question
  107. Greinacher voltage multiplier
  108. Dead channel
  109. Euphonia is back!
  110. What's the best 417A & 437A?
  111. Eico ST70 OPT / Schematic Question
  112. Is this feasible?
  113. Repairing 805 tubes
  114. jadis defy 7 help
  115. 6n1p Screen
  116. Mc275ce
  117. Are these tubes are the same?
  118. "King of tube(s) for line-stages"
  119. Acoustic Plan PhonoMaster
  120. Heathkit AA-81 schematic
  121. has anyone kept a copy of gpimm's latest self-biasing CCS?
  122. How to wire inductor - s and n
  123. Rogers Cadet III schematics Corrections
  124. Hickok TV-7/U restoration advice needed.
  125. Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey
  126. 24v Aikido for newb.
  127. Powering Up Old Tube Amps/Receivers
  128. preliminary schematic drawing rev.1a
  129. Not a typical MKIII Dynaco.
  130. mosfet buffer for power stage
  131. EI KT-90 news
  132. 304TL based Class A
  133. Purchasing NOS Tubes
  134. tube power supply design resources
  135. High Voltage Regulator Design
  136. max. output for two 5881 tubes?
  137. Excessive current draw in Fender Deville
  138. driving your power stage
  139. Need schematic Cary Audio SLP-70 preamp
  140. Bridge-balanced amplifiers
  141. Tell-tale signs of good feedback usage?
  142. Any mid priced SE transformers around?
  143. Bias resistor
  144. Some sneek peeks
  145. Old radio with 4 pin sockets, info?
  146. need help on pot tapers
  147. A typical KT88 tubes
  148. amplifier for unknown output transformers?
  149. vista audio
  150. CV4014 and 5650 - any audio application of these tubes?
  151. SVP-PRO schematic
  152. Looking for a good source for attenuators
  153. Center-tap to ground?
  154. 6n1p-ev operating points
  155. where to find old pot's with switch built in
  156. Maggie refurb project
  157. Parafeed output
  158. Hirtel junior stereo italian tube amp
  159. power supply help
  160. 7189/7189A Problem
  161. Glow modulation tubes
  162. Transformer Hum leaks to Speakers
  163. EAR Yoshino V20 Amplifier
  164. Repair a tube tester?
  165. starting PP - 6p3s
  166. 6BL7 rA in PP
  167. Why such high plate voltage in 2A3 DRD?
  168. to parafeed or not to parafeed that is the question
  169. Lowering voltage output of transformer
  170. Using EL34 in a line stage
  171. peerless transfomer information
  172. Output transformer design for SS amp
  173. CD source fortube amp
  174. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  175. BIG tube amplifier, two qbl5/3500 tubes
  176. EL34 or 6L6 mono help me please!!
  177. Why don't we use output tubes as cathode followers?
  178. 6C33 driver recommendations
  179. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  180. Minimum Zener Current with Pass Device
  181. Favorite easy 6V6 push-pull circuit?
  182. Tubecad soft-clipping circuit
  183. broskie voltage regulator
  184. E88CC dissipation in Aikido
  185. Magnavox 6BQ5/EL84 and Mr. Gabe
  186. Aikido hum has me stumped !!!!
  187. 5842 and 5842 WA for 300B
  188. Basic tube combination question.
  189. Resistive ps voltage follower
  190. First time DIY tube
  191. Need help with hum and faint left channel on my S5 Electronics kit
  192. grid impedence of paralleled tubes in push pull
  193. Fender Bassman PT Rewind
  194. rectification
  195. 6AU6 Varieties
  196. EMI tubes (British made)
  197. valve wear symptoms?
  198. Standby switch, snap, crackle, pop?
  199. Aikido PSU questions (Bas Boards)
  200. one tube amps
  201. Intermittant Clicking
  202. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  203. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  204. Tube spice models
  205. Audible Illusions Modulus faulty?
  206. Ei Tubes..
  207. more output transformer questions
  208. 6C33 design comments?
  209. Current production EL34
  210. Impedance matching
  211. question about multiple input transformer in same tube mic pre.
  212. One tube preamp
  213. Help 6G-E12A pinout??
  214. DIY Jadis JA 30 power amp PCB
  215. output tube options
  216. wanted: accurate 257 tube tester manual
  217. Developing a "universal" tube power supply PCB
  218. Looking for a Cover....
  219. EL34 Sound
  220. Pinout ECC83 to ECC808
  221. How to convert S5 K-12g kit to dual mono?
  222. EL84 + EF86
  223. Tube amps, power and speaker impedance
  224. How to figure output Z of SRPP?
  225. Rose RV23 preamp
  226. Wanted RIAA stage with 6SN7
  227. Help with PSU Design
  228. Tetrode output stage
  229. New amplifier project -my layout
  230. jadis ja 30
  231. Aikido Attenuator kit question
  232. Fender Delux Reverb AB763
  233. Weird crackling sound without B+ applied
  234. More Aikido questions...........
  235. 6C41C in OTL?
  236. Looking for Voss-Ellis article
  237. 807 E-Linear
  238. ECC86 model
  239. Tube ID & Code Help Needed
  240. PS Decoupling question
  241. Need help in trouble-shooting my AES Sixpacs amp
  242. Space between power tubes
  243. Schematic please? SRPP with current source cathode follower
  244. Series connecting output Transformers.
  245. 6C45-Pi battery RIAA/Pre sugestions?
  246. Good News For EI Tube Fans
  247. My 300B project...
  248. building Single Ended amps
  249. Higher power amps using 807's or 1625's
  250. Project using Eico ST 70 Iron?

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