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  1. EL84 SE advice for a beginner
  2. Re: Buffer with tube PCC88
  3. Transformer impedance calcs from windings
  4. Anyone came across AirTight ATM-2 schematic?
  5. Transmitter tube hybrid - Because why not?
  6. where is the output capacitor?
  7. Clarifications on role of pre VS power
  8. My poor man version of the Raven Preamplifier.
  9. GSG problem
  10. Transformer selection/brands
  11. Newbie DC heater help
  12. HF oscillation bursts at low ( < 40Hz) frequencies
  13. Why the GZ34 Rectifiers are so expensive!
  14. OPT designing?
  15. Looking for a DIY repair guy near Toledo or Ft. Wayne
  16. beginner: which DIY kit will go well with these drivers?
  17. Xindak MT-3
  18. Loudness controls
  19. Advice on replacing Yaqin MC-10L
  20. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  21. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  22. First Tube Help
  23. ampex 6793 stereo
  24. RCA Victrola 8V91
  25. what to do with these tubes? (6AQ5/6AR5)
  26. Sylvania 45C14M advice
  27. Re-designing 6DJ8 circuit for the 6CG7
  28. Hi fi kits
  29. bias capacitor
  30. Question re: Signal Ground versus HT ground
  31. Schematic to a friend
  32. Newbie question about transformers
  33. Request for suggestions. Akai M8 mono amp schematic validation.
  34. Rectifier
  35. Source for transformer parts?
  36. odd order harmonic squelching?
  37. Best Current Production 6550 / KT88
  38. Wharfedale W12 output transformers
  39. Are we committing suicide?! (Asbestos in vaccum tube base)
  40. Help me to Identify this Tube
  41. GU50 socket blues
  42. New 18W build el84/12ax7
  43. Why a follower in a parafeed triodeamp?
  44. Heads up for Australian tube amp diyers
  45. build new amp from 2 vintage tube amps?
  46. Sansui AU-111 rebuild and need some help
  47. Interstage/Input Transformer
  48. Ergo Ella PP Amplifier Wiring
  49. 6DX8/ECL84/6F3P Baby Huey
  50. Old tube amp info?
  51. MEIXING MING DA MC 2006 Phonostage schematics
  52. Just what the world needs - another EL84 amp
  53. Help me pick el34b tubes
  54. heathkit SA2
  55. Need help on RIAA
  56. GU50 plate curves
  57. What tube is this?
  58. Help with GZ34
  59. Need help in modifying Roberts 770 monoblocks
  60. PP and PPP
  61. ECL82 Single Tube Amp
  62. circuit idea
  63. Need Telefunken Hymnus 5438 Dial Glass
  64. Bias probes/Am I getting true readings
  65. How to measure output power
  66. Oddblock Wooden Case
  67. Amplifier Quandary
  68. Fuse blows instantly
  69. Looking for a fairly simple Hi gain tube pre amp project
  70. Best 2a3 PP OPT.
  71. Sharing cathode resistor and capacitor
  72. Power tubes in cascode for output section?
  73. good tube service tech in Los Angeles?
  74. Proposal for a new sticky thread
  75. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  76. PCF what?
  77. stupid question about heater wire to ground
  78. OTL All American Five? (or Ten)
  79. Scored a very nice H H Scott 272!
  80. Simple DIY Stereo Tube Amp with around 20W
  81. Maton Amp
  82. New Tech
  83. LS8 pre kit as an output stage for DAC?
  84. Japanese Valves
  85. B+ delay for DHT amp
  86. QQV03-20A/CV2799
  87. 0,22 0,33 0,47.....uF
  88. Most powerful SE DIY design?
  89. 420vdc supply for a tube amp
  90. PSE 2a3 operating points?
  91. Ju-Jutsu: The Ultimate Monoblock
  92. Looking for Phono Stage ...
  93. Finished my Fisher 460t-thanks
  94. Datasheet Cpk values
  95. Eico635 tester
  96. 6p3s...
  97. Help with Amp Salvage
  98. 808 SE Build
  99. how to bias my rebuilt dynaco st 70
  100. Want help - RCA Tube Manual RIAA Phono Stage
  101. Tube Pre-amp for both CD and Phono inputs
  102. Cascode Driver Oscillation
  103. 872b or 6gj5a for a homebrew bass amp
  104. how does it sound and perform?
  105. Bootstrapped long tail
  106. Thorens TEM 3200 clone
  107. Identifying this RCA Transformer
  108. Tube burning
  109. Add Standby Directly after Rectifier, or After First Filter Stage?
  110. Help with some tube ID
  111. CCS power amp bias
  112. this is EL34 tube of what model?
  113. Looking for constructive criticism on my first design
  114. Audio note kit 1 vs Meishu
  115. Tube Amp Gain V.S. RF Gain
  116. Kool-mu material for building audio transformer
  117. Buzz/Hum in Matrix amplifier
  118. Optimation PA-250AC Lab-Grade Audio Amplifier
  119. RS1003 in SE triode-UL monoblocks
  120. Bypass capacitors in Tube amps
  121. Basic question re: gNFB around 3 stages
  122. James PP Audio Transformers, any good?
  123. Seeking advice for tube amp kit on,seems to be, chinese site
  124. Tube pricing from 1981
  125. 6e5p WCF headphone amp with no cap!
  126. "How it's made" vacuum tubes..
  127. Citation I and IV phono schematic query
  128. GS-4V High-mu russian triode for RIAA preamp
  129. good source for amp chassis in europe?
  130. Help identify and replacement of ? resistor
  131. New tube amp diy kit required power?
  132. Decoupling DC heater supply between valves..benefit?
  133. The Aikido Comedy: Straight Talk
  134. Recapping tube preamp questions
  135. A tube amp that's actually a tesla coil.
  136. Tube "Orientation"
  137. 18 watt tremolo vvr
  138. Pre amp output, would this work?
  139. Aikido Power Amp.....Possible??
  140. 12AX7 questions
  141. 6550 PUSH-PULL
  142. CCS at plate? Unknown schematic part
  143. Most odd grid choke behaviour.
  144. Spec for Altec TP-404 Transformer
  145. why do wimpy drivers for 2A3 work as well as they do?
  146. Seeking advice on Tube buffer / pre-amp
  147. 8x Push-pull KT88 class A in triode mode
  148. Tube Pre dull into Tube Amp - cause ?
  149. FINALLY I can start building my GM70
  150. Russian triodes ГИ-15Б arriving in a few days
  151. Cap or resistor
  152. KT88/PP driver confusion
  153. Simple SE GU-50
  154. Darling 1626
  155. 01a DHT Preamp
  156. Suitable tubes for Gomes output
  157. phono line stage project
  158. Whats wrong with this circuit?
  159. Any Newcomb Gurus.?
  160. Preamp Tube MU Level?
  161. SRPP Paraccordion topology ?
  162. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  163. Modification of a Chinese KT90 PP amplifier
  164. Tricky Headphone Amp design for AK4396
  165. How to know voltage bias adjustmentwith this data?
  166. Strange Stability Enhancement Trick
  167. has anyone bought tubes from http://www.tangotubes.com/
  168. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  169. Ever heard of British transofmer company "Ro"?
  170. A friend gave me some random tubes...
  171. Replacement for 6e2 without vu
  172. PP GU50 triode strapped project
  173. Tube VAS stage questions???
  174. OT impedance help: 9.8 vs 8k
  175. popping & crackling noise from restored valve AM radio
  176. Choosing 6550 PP Output Transformer
  177. Reversing Interstage Transformer
  178. Aikido 9 pin All in One Build
  179. KT88 PP UL Design Help Needed
  180. Cayin A-300B schematic needed
  181. Please Recommend a Preamp!
  182. Which Antek transforms to use
  183. Integrated Amp as Preamp and Subwoofer amp
  184. Uses for 715C Pulse Tetrode
  185. PP KT-88 w/866A MV HT Supply
  186. EC88 (6DL4) NOS Mullard - any use at all?
  187. Advice sought on thermionic headphone amp
  188. Eico HF-81: Input Selector bypass
  189. 12b4 bass rolloff problem
  190. No Right ch sound on yaqin mc10l
  191. tester causing bias to rise?
  192. Heaters & Filaments: AC vs. DC
  193. Old HP power transformers... need some wiring advice!
  194. RCA RS177H just dosen't sound right! Caps?
  195. silicon or tube rectifier in an EL34 SE
  196. Help original 300G LEGACY
  197. 813 Tube-Steak!
  198. Basic 12AU7 heatrr question
  199. Shipping a vacuum tube to China
  200. 6DJ8/ECC88-SRPP Tube Preamplifier
  201. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  202. Found tons of Tubes,and many other parts
  203. EZ80 Data Sheets, R-Lim and Max Cap
  204. Filament Voltages CT vs Non-CT
  205. Troubleshooting help needed
  206. What is it? Tube guessology
  207. Bass & Treble controls, or rather lack of.
  208. Quicksilver 8417 Power Supply Question
  209. Why a sudden distortion in treble of this SET amplifier?
  210. Antitriode PP with EL34
  211. How to calculate Pout for Push Pull design
  212. Newbie Question - Power Transformer vs Isolation Transformer
  213. All tubes red plating
  214. Exceeding bias voltage?
  215. Vacuum State RTP Preamp Problem
  216. Alfred Morgan Tube Preamplifier
  217. 845 vs GM70
  218. Looking for project suggestions - 12au7 pre-amp?
  219. Contemporary tradition breaking amp schematics.
  220. ul - triode coupled screen grid resistor
  221. Optimum driver valve for an interstage-transformer-driven SE 300B
  222. 6C33C
  223. Soundcraftsmen 5050
  224. Tetra Phono Question
  225. WF tube
  226. Opt laminations isolation
  227. Heretical Source
  228. Broskie auto bias
  229. Heater Wiring - the Good the Bad and the Ugly
  230. Counterpoint SA5000 Help
  231. Problem with ECC83 measurement values - please help
  232. Newbie Bias help ?
  233. AV305m AVVT
  234. Pot mechanical resistance and restoration..
  235. HMV Little Nipper mantle radio = 1 STEREO
  236. What's the simplest way to adjust filament voltage?
  237. GDAP-06
  238. Audio Note L6 - Schematic?
  239. Preventing HV flashover on socket pins
  240. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  241. SE with PP OPT's?
  242. 12ax7/12AT7 Recommendations
  243. HELP: Eimac 75TL amp high frequency roll off
  244. unison reserch s8, let's build it!
  245. Where do super high end companies get their transformers?
  246. Tube Tester Panel Meter
  247. Attic find AMP
  248. Help getting Imax and Eb approximations for a push-pull amp
  249. Is this amp OK to buy, or is this a problem?
  250. Swirling Harmonics, can it be described

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