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  1. peavey heritage 212
  2. Crosley 68CR restore
  3. Question for EU diyaudio members
  4. need advises tweaking PSE 300B
  5. CounterPoint SA-12
  6. Bleeder Resistor for Choke Input Supply
  7. Large tube anode connections caps.
  8. Gyrators
  9. newbie questions about 300B tube amp
  10. EL84 SE advice for a beginner
  11. Re: Buffer with tube PCC88
  12. Transformer impedance calcs from windings
  13. Anyone came across AirTight ATM-2 schematic?
  14. Transmitter tube hybrid - Because why not?
  15. where is the output capacitor?
  16. Clarifications on role of pre VS power
  17. My poor man version of the Raven Preamplifier.
  18. GSG problem
  19. Transformer selection/brands
  20. Newbie DC heater help
  21. HF oscillation bursts at low ( < 40Hz) frequencies
  22. Why the GZ34 Rectifiers are so expensive!
  23. OPT designing?
  24. Looking for a DIY repair guy near Toledo or Ft. Wayne
  25. beginner: which DIY kit will go well with these drivers?
  26. Xindak MT-3
  27. Loudness controls
  28. Advice on replacing Yaqin MC-10L
  29. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  30. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  31. First Tube Help
  32. ampex 6793 stereo
  33. RCA Victrola 8V91
  34. what to do with these tubes? (6AQ5/6AR5)
  35. Sylvania 45C14M advice
  36. Re-designing 6DJ8 circuit for the 6CG7
  37. Hi fi kits
  38. bias capacitor
  39. Question re: Signal Ground versus HT ground
  40. Schematic to a friend
  41. Newbie question about transformers
  42. Request for suggestions. Akai M8 mono amp schematic validation.
  43. Rectifier
  44. Source for transformer parts?
  45. odd order harmonic squelching?
  46. Best Current Production 6550 / KT88
  47. Wharfedale W12 output transformers
  48. Are we committing suicide?! (Asbestos in vaccum tube base)
  49. Help me to Identify this Tube
  50. GU50 socket blues
  51. New 18W build el84/12ax7
  52. Why a follower in a parafeed triodeamp?
  53. Heads up for Australian tube amp diyers
  54. build new amp from 2 vintage tube amps?
  55. Sansui AU-111 rebuild and need some help
  56. Interstage/Input Transformer
  57. VALVEKING ROYAL8 with 6p14p-EV
  58. Ergo Ella PP Amplifier Wiring
  59. 6DX8/ECL84/6F3P Baby Huey
  60. Old tube amp info?
  61. MEIXING MING DA MC 2006 Phonostage schematics
  62. Problem with a Peavey Classic 50
  63. Just what the world needs - another EL84 amp
  64. Help me pick el34b tubes
  65. heathkit SA2
  66. Need help on RIAA
  67. GU50 plate curves
  68. What tube is this?
  69. Help with GZ34
  70. Need help in modifying Roberts 770 monoblocks
  71. PP and PPP
  72. ECL82 Single Tube Amp
  73. circuit idea
  74. Need Telefunken Hymnus 5438 Dial Glass
  75. Bias probes/Am I getting true readings
  76. How to measure output power
  77. Oddblock Wooden Case
  78. Amplifier Quandary
  79. Fuse blows instantly
  80. Looking for a fairly simple Hi gain tube pre amp project
  81. Best 2a3 PP OPT.
  82. Sharing cathode resistor and capacitor
  83. Power tubes in cascode for output section?
  84. good tube service tech in Los Angeles?
  85. Proposal for a new sticky thread
  86. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  87. PCF what?
  88. stupid question about heater wire to ground
  89. OTL All American Five? (or Ten)
  90. Scored a very nice H H Scott 272!
  91. Simple DIY Stereo Tube Amp with around 20W
  92. Maton Amp
  93. New Tech
  94. LS8 pre kit as an output stage for DAC?
  95. Japanese Valves
  96. B+ delay for DHT amp
  97. QQV03-20A/CV2799
  98. 0,22 0,33 0,47.....uF
  99. Most powerful SE DIY design?
  100. 420vdc supply for a tube amp
  101. PSE 2a3 operating points?
  102. Ju-Jutsu: The Ultimate Monoblock
  103. Looking for Phono Stage ...
  104. Finished my Fisher 460t-thanks
  105. Datasheet Cpk values
  106. Eico635 tester
  107. 6p3s...
  108. Help with Amp Salvage
  109. 808 SE Build
  110. how to bias my rebuilt dynaco st 70
  111. Want help - RCA Tube Manual RIAA Phono Stage
  112. Tube Pre-amp for both CD and Phono inputs
  113. Cascode Driver Oscillation
  114. 872b or 6gj5a for a homebrew bass amp
  115. how does it sound and perform?
  116. Bootstrapped long tail
  117. Thorens TEM 3200 clone
  118. Identifying this RCA Transformer
  119. Tube burning
  120. Add Standby Directly after Rectifier, or After First Filter Stage?
  121. Help with some tube ID
  122. CCS power amp bias
  123. this is EL34 tube of what model?
  124. Looking for constructive criticism on my first design
  125. Audio note kit 1 vs Meishu
  126. Tube Amp Gain V.S. RF Gain
  127. Kool-mu material for building audio transformer
  128. Buzz/Hum in Matrix amplifier
  129. Optimation PA-250AC Lab-Grade Audio Amplifier
  130. RS1003 in SE triode-UL monoblocks
  131. Bypass capacitors in Tube amps
  132. Basic question re: gNFB around 3 stages
  133. James PP Audio Transformers, any good?
  134. Seeking advice for tube amp kit on,seems to be, chinese site
  135. Tube pricing from 1981
  136. 6e5p WCF headphone amp with no cap!
  137. "How it's made" vacuum tubes..
  138. Citation I and IV phono schematic query
  139. GS-4V High-mu russian triode for RIAA preamp
  140. good source for amp chassis in europe?
  141. Help identify and replacement of ? resistor
  142. New tube amp diy kit required power?
  143. Decoupling DC heater supply between valves..benefit?
  144. The Aikido Comedy: Straight Talk
  145. Recapping tube preamp questions
  146. A tube amp that's actually a tesla coil.
  147. Tube "Orientation"
  148. 18 watt tremolo vvr
  149. Pre amp output, would this work?
  150. Aikido Power Amp.....Possible??
  151. 12AX7 questions
  152. 6550 PUSH-PULL
  153. CCS at plate? Unknown schematic part
  154. Most odd grid choke behaviour.
  155. Spec for Altec TP-404 Transformer
  156. why do wimpy drivers for 2A3 work as well as they do?
  157. Seeking advice on Tube buffer / pre-amp
  158. 8x Push-pull KT88 class A in triode mode
  159. Tube Pre dull into Tube Amp - cause ?
  160. FINALLY I can start building my GM70
  161. Russian triodes ГИ-15Б arriving in a few days
  162. Cap or resistor
  163. KT88/PP driver confusion
  164. Simple SE GU-50
  165. Darling 1626
  166. 01a DHT Preamp
  167. Suitable tubes for Gomes output
  168. phono line stage project
  169. Whats wrong with this circuit?
  170. Any Newcomb Gurus.?
  171. Preamp Tube MU Level?
  172. SRPP Paraccordion topology ?
  173. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  174. Modification of a Chinese KT90 PP amplifier
  175. Tricky Headphone Amp design for AK4396
  176. How to know voltage bias adjustmentwith this data?
  177. Strange Stability Enhancement Trick
  178. has anyone bought tubes from http://www.tangotubes.com/
  179. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  180. Ever heard of British transofmer company "Ro"?
  181. A friend gave me some random tubes...
  182. Replacement for 6e2 without vu
  183. PP GU50 triode strapped project
  184. Tube VAS stage questions???
  185. OT impedance help: 9.8 vs 8k
  186. popping & crackling noise from restored valve AM radio
  187. Choosing 6550 PP Output Transformer
  188. Reversing Interstage Transformer
  189. Aikido 9 pin All in One Build
  190. KT88 PP UL Design Help Needed
  191. Cayin A-300B schematic needed
  192. Please Recommend a Preamp!
  193. Which Antek transforms to use
  194. Integrated Amp as Preamp and Subwoofer amp
  195. Uses for 715C Pulse Tetrode
  196. PP KT-88 w/866A MV HT Supply
  197. EC88 (6DL4) NOS Mullard - any use at all?
  198. Advice sought on thermionic headphone amp
  199. Eico HF-81: Input Selector bypass
  200. 12b4 bass rolloff problem
  201. No Right ch sound on yaqin mc10l
  202. tester causing bias to rise?
  203. Heaters & Filaments: AC vs. DC
  204. Old HP power transformers... need some wiring advice!
  205. Old HP power transformers... need some wiring advice!
  206. RCA RS177H just dosen't sound right! Caps?
  207. silicon or tube rectifier in an EL34 SE
  208. Help original 300G LEGACY
  209. 813 Tube-Steak!
  210. Basic 12AU7 heatrr question
  211. Shipping a vacuum tube to China
  212. 6DJ8/ECC88-SRPP Tube Preamplifier
  213. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  214. Found tons of Tubes,and many other parts
  215. Ampeg B15 Heritage Clone Help
  216. EZ80 Data Sheets, R-Lim and Max Cap
  217. Filament Voltages CT vs Non-CT
  218. Troubleshooting help needed
  219. What is it? Tube guessology
  220. Bass & Treble controls, or rather lack of.
  221. Quicksilver 8417 Power Supply Question
  222. Why a sudden distortion in treble of this SET amplifier?
  223. 5f1 Champ grounding
  224. Antitriode PP with EL34
  225. How to calculate Pout for Push Pull design
  226. Newbie Question - Power Transformer vs Isolation Transformer
  227. All tubes red plating
  228. Exceeding bias voltage?
  229. Vacuum State RTP Preamp Problem
  230. Alfred Morgan Tube Preamplifier
  231. 845 vs GM70
  232. Looking for project suggestions - 12au7 pre-amp?
  233. Contemporary tradition breaking amp schematics.
  234. ul - triode coupled screen grid resistor
  235. Optimum driver valve for an interstage-transformer-driven SE 300B
  236. 6C33C
  237. Soundcraftsmen 5050
  238. Tetra Phono Question
  239. WF tube
  240. Opt laminations isolation
  241. Heretical Source
  242. Broskie auto bias
  243. heater wiring - the Good the Bad and the Ugly
  244. AC Line Filter
  245. Counterpoint SA5000 Help
  246. Problem with ECC83 measurement values - please help
  247. Newbie Bias help ?
  248. AV305m AVVT
  249. Pot mechanical resistance and restoration..
  250. HMV Little Nipper mantle radio = 1 STEREO

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