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  1. CV4014 and 5650 - any audio application of these tubes?
  2. SVP-PRO schematic
  3. Looking for a good source for attenuators
  4. Center-tap to ground?
  5. 6n1p-ev operating points
  6. where to find old pot's with switch built in
  7. Maggie refurb project
  8. Parafeed output
  9. Hirtel junior stereo italian tube amp
  10. power supply help
  11. 7189/7189A Problem
  12. Glow modulation tubes
  13. Transformer Hum leaks to Speakers
  14. EAR Yoshino V20 Amplifier
  15. Repair a tube tester?
  16. starting PP - 6p3s
  17. 6BL7 rA in PP
  18. Why such high plate voltage in 2A3 DRD?
  19. to parafeed or not to parafeed that is the question
  20. Lowering voltage output of transformer
  21. Using EL34 in a line stage
  22. peerless transfomer information
  23. Output transformer design for SS amp
  24. CD source fortube amp
  25. What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ?
  26. BIG tube amplifier, two qbl5/3500 tubes
  27. EL34 or 6L6 mono help me please!!
  28. Why don't we use output tubes as cathode followers?
  29. 6C33 driver recommendations
  30. 100watt power, fixed gain far cleaner than Marshall amp any sugestion
  31. Minimum Zener Current with Pass Device
  32. Favorite easy 6V6 push-pull circuit?
  33. Tubecad soft-clipping circuit
  34. broskie voltage regulator
  35. E88CC dissipation in Aikido
  36. Magnavox 6BQ5/EL84 and Mr. Gabe
  37. Aikido hum has me stumped !!!!
  38. 5842 and 5842 WA for 300B
  39. Basic tube combination question.
  40. Resistive ps voltage follower
  41. First time DIY tube
  42. Need help with hum and faint left channel on my S5 Electronics kit
  43. grid impedence of paralleled tubes in push pull
  44. Fender Bassman PT Rewind
  45. rectification
  46. 6AU6 Varieties
  47. EMI tubes (British made)
  48. valve wear symptoms?
  49. Standby switch, snap, crackle, pop?
  50. Aikido PSU questions (Bas Boards)
  51. one tube amps
  52. Intermittant Clicking
  53. How to solve noise/storing/on car Tube Amp ? any Schematic ?
  54. Series MOSFET regulator better with just voltage ref on gate or with error amp?
  55. Tube spice models
  56. Audible Illusions Modulus faulty?
  57. Ei Tubes..
  58. more output transformer questions
  59. 6C33 design comments?
  60. Current production EL34
  61. Impedance matching
  62. question about multiple input transformer in same tube mic pre.
  63. One tube preamp
  64. Help 6G-E12A pinout??
  65. DIY Jadis JA 30 power amp PCB
  66. output tube options
  67. wanted: accurate 257 tube tester manual
  68. Developing a "universal" tube power supply PCB
  69. Looking for a Cover....
  70. EL34 Sound
  71. Pinout ECC83 to ECC808
  72. How to convert S5 K-12g kit to dual mono?
  73. EL84 + EF86
  74. Tube amps, power and speaker impedance
  75. How to figure output Z of SRPP?
  76. Rose RV23 preamp
  77. Wanted RIAA stage with 6SN7
  78. Help with PSU Design
  79. Tetrode output stage
  80. New amplifier project -my layout
  81. jadis ja 30
  82. Aikido Attenuator kit question
  83. Fender Delux Reverb AB763
  84. Weird crackling sound without B+ applied
  85. More Aikido questions...........
  86. 6C41C in OTL?
  87. Looking for Voss-Ellis article
  88. 807 E-Linear
  89. ECC86 model
  90. Tube ID & Code Help Needed
  91. PS Decoupling question
  92. Need help in trouble-shooting my AES Sixpacs amp
  93. Space between power tubes
  94. Schematic please? SRPP with current source cathode follower
  95. Series connecting output Transformers.
  96. 6C45-Pi battery RIAA/Pre sugestions?
  97. Good News For EI Tube Fans
  98. My 300B project...
  99. building Single Ended amps
  100. Higher power amps using 807's or 1625's
  101. Project using Eico ST 70 Iron?
  102. M-1 amplifier kit - full documentation in public domain now
  103. Sus tubes ?
  104. Adjusting BIAS
  105. "Shrine" SE Amp using 6AH6 and 1625
  106. MFA Lumi - possible to "un-darken" the sound signature?
  107. Output transformers resistance
  108. Aikido heaters
  109. Return to Aikido Hum issues
  110. Looking for Schematic 6550 tube amp triode mode more than 35Watt ?
  111. Compare the sound of 6550 amp to a 6L6 amp
  112. Biasing a valve amp
  113. Scoundrel days
  114. Counterpoint SA100 one channel doesn´t work
  115. Hepl me circuit 6h30
  116. 6LR8 Amp Preliminary Questions
  117. Another 6L6 schematic
  118. 6S19P Amplifier
  119. An idea for a PL84 amp with toroidal interstage.
  120. 417A-300B Plate Choke or Interstage Coupled?
  121. Identifying an unknown tube
  122. Looking for EL34 PP Schematic Amp ? at least 35Watt
  123. ADVICE on Valvestate crunch, but all tube instead.
  124. Help diagnosing noise
  125. st70 blowout
  126. Gu81-m
  127. 6c4 pre-amp circuit
  128. 6SN7 6.3 V heater supply
  129. 2C26 &E1148's
  130. First ECL82 amp probs.
  131. JE Labs ST2A3DX
  132. Punchy 813 Poweramp
  133. Hum in AE K502 or K12m
  134. SE 6SN7 amp....
  135. Audio Innovations 800C schematic or even better service manual?
  136. Music angel amps
  137. Low gain 9-pin tubes for Aikido?
  138. JADIS ORCHESTRA IN PCB (original is hardwire)
  139. Blown Valve in ARC VT50 - help
  140. LAMM ML3 *Signature*
  141. Diode for DC heater
  142. Calculating shunt reg source impedance
  143. Marant 7c preamp diyzone project
  144. PSU Caps for an EL34 SET
  145. high gain 12ax7 preamp from scratch?
  146. IXYS 10M45 chip CCS
  147. Octal Aikido? What tubes?
  148. Tube power supply questions
  149. 6J5 input swing
  150. Checking spice model plate curve accuracy
  151. How many Ohm for triode strapping?
  152. Power supply for Heathkit WA-P2 pre-amplifier
  153. Bogen MX-60a tune-up
  154. dynaco st35 clone problem
  155. Edcor OPT's
  156. ECC40 cascode
  157. Air Vane RIAA Tuning Question
  158. Tube Noob! need help with tubes lots of tubes
  159. bias adjust installation, bogen mo-100a mo 100a quicksilver
  160. 6EM7 Amp
  161. 40mu tube preamp suggestions?
  162. Safe installation of interstage
  163. I've built some amps, need suggestions for a DIY preamp or line stage
  164. CRD diode CCS any good <1mA?
  165. Help fixing a Border Patrol Power Amp
  166. TAD-60 schematics / mods
  167. Selling tube amps
  168. Drd 300b Pse
  169. Hammond Transformer Winding Resistance -- 369GX
  170. The meaning of VA in a TX
  171. Ucl85
  172. Best way to measure cathode follower current
  173. Neuman U47
  174. OT: Season's greetings to all
  175. Anyone have experience with a 6AN4...?
  176. L-pad instead of H-pad??
  177. valve regulated psu
  178. looking for metal enclosure for custom preamps
  179. basie+aikido preamp
  180. Input Switch?
  181. Help me please
  182. Congratulations, you just built a $2K antenna !
  183. Sonic Frontiers Line 2, please help?
  184. Sovtec 12AX7
  185. removing AC Hum on Aikido????
  186. Stereo Build - Mikaels KT88
  187. 6V6GT scematic, any good, comments?
  188. 807 vs 811A output: Sonic preference?
  189. Cheap PP OPTs
  190. Mc C-22 Ce
  191. Transformer Coupled Linestage
  192. 6CY7 Variants
  193. EZ81 rectifier noise
  194. Any good Output Transformers from China?
  195. Solid Core or Multistrand?
  196. Aikido - alive and kicking butt (not mine!)
  197. Dead Copland CTA-501
  198. Is the E86L the industrial sister of the EL86?
  199. Hammond 1630SEA, worth trying?
  200. Using Gas Regulators
  201. Cheap and Chinese KT88 SE amp
  202. Cary v12 -> V12r Conversion Questions
  203. 15 watts loud enough?
  204. ST70 hybrid finally up and running !!
  205. The Making of a Triode
  206. Spice models
  207. HV SS bench top power supply, advice needed
  208. A new Aikido is born - and kicking butt!
  209. Preamp - DIY vs Audio Research (or similar)
  210. Stromberg-Carlson 433 : Add standby or not?
  211. All-tube digital clock
  212. audible illusions dual mono preamp
  213. Siemens/Klangfim 6.4 mono question..?
  214. James 6123 OPT Wiring Help
  215. Next Bogen Conversion soon - need phase splitter advice
  216. A basic question regarding transformer laminations
  217. TOO many volts ????!!!!
  218. Dynaco Mark VI
  219. Frankenstein
  220. Unity buffer from 7-pin triode?
  221. Heathkit WA-P2 preamp
  222. Internal shield on 6922 dual triode
  223. 6cl3, 6cj3, 6dw4, 6ck3, 6ay3
  224. 418a
  225. Is it worth biasing with a distortion analyzer ???
  226. Usefulness of 6X8 tube?
  227. reducing hum in SET amps
  228. dynamic loadline
  229. Designing Transformer-Coupled Circuits...
  230. Tube-amp power issues
  231. SCA-35 Dynaco
  232. Q on voltage swing
  233. Buzz on preamp
  234. Help- I'm new!
  235. tube phono stage
  236. Schematic for Gm70!Where to find it!
  237. getting the specs on a transformer
  238. Nixie bargraph as a audio VU-meter
  239. Unique or odd uses for the diyAudio CCS boards
  240. Balanced tube preamp for class D power amps.
  241. 117v heater tube 117n7
  242. bypassing the plate-load
  243. Is this OK for a heater supply?
  244. which gauge wire for PSU????
  245. Citation II OPT?
  246. A new project, Blue Velvet Pre Amp is ready and rocks ! ! !
  247. Suggested budget pwr sply topologies?
  248. Battery for Cathode Voltage?
  249. Calbest help
  250. PO'ed at RFI

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