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  1. Hi fi kits
  2. bias capacitor
  3. Question re: Signal Ground versus HT ground
  4. Schematic to a friend
  5. Newbie question about transformers
  6. Request for suggestions. Akai M8 mono amp schematic validation.
  7. Rectifier
  8. Source for transformer parts?
  9. odd order harmonic squelching?
  10. Best Current Production 6550 / KT88
  11. Wharfedale W12 output transformers
  12. Are we committing suicide?! (Asbestos in vaccum tube base)
  13. Help me to Identify this Tube
  14. GU50 socket blues
  15. New 18W build el84/12ax7
  16. Why a follower in a parafeed triodeamp?
  17. Heads up for Australian tube amp diyers
  18. build new amp from 2 vintage tube amps?
  19. Sansui AU-111 rebuild and need some help
  20. Interstage/Input Transformer
  21. VALVEKING ROYAL8 with 6p14p-EV
  22. Ergo Ella PP Amplifier Wiring
  23. 6DX8/ECL84/6F3P Baby Huey
  24. Old tube amp info?
  25. MEIXING MING DA MC 2006 Phonostage schematics
  26. Just what the world needs - another EL84 amp
  27. Help me pick el34b tubes
  28. heathkit SA2
  29. Need help on RIAA
  30. GU50 plate curves
  31. What tube is this?
  32. Help with GZ34
  33. Need help in modifying Roberts 770 monoblocks
  34. PP and PPP
  35. ECL82 Single Tube Amp
  36. circuit idea
  37. Need Telefunken Hymnus 5438 Dial Glass
  38. Bias probes/Am I getting true readings
  39. How to measure output power
  40. Oddblock Wooden Case
  41. Amplifier Quandary
  42. Fuse blows instantly
  43. Looking for a fairly simple Hi gain tube pre amp project
  44. Best 2a3 PP OPT.
  45. Sharing cathode resistor and capacitor
  46. Power tubes in cascode for output section?
  47. good tube service tech in Los Angeles?
  48. Proposal for a new sticky thread
  49. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  50. PCF what?
  51. stupid question about heater wire to ground
  52. OTL All American Five? (or Ten)
  53. Scored a very nice H H Scott 272!
  54. Simple DIY Stereo Tube Amp with around 20W
  55. Maton Amp
  56. New Tech
  57. LS8 pre kit as an output stage for DAC?
  58. Japanese Valves
  59. B+ delay for DHT amp
  60. QQV03-20A/CV2799
  61. 0,22 0,33 0,47.....uF
  62. Most powerful SE DIY design?
  63. 420vdc supply for a tube amp
  64. PSE 2a3 operating points?
  65. Ju-Jutsu: The Ultimate Monoblock
  66. Looking for Phono Stage ...
  67. Finished my Fisher 460t-thanks
  68. Datasheet Cpk values
  69. Eico635 tester
  70. 6p3s...
  71. Help with Amp Salvage
  72. 808 SE Build
  73. how to bias my rebuilt dynaco st 70
  74. Want help - RCA Tube Manual RIAA Phono Stage
  75. Tube Pre-amp for both CD and Phono inputs
  76. Cascode Driver Oscillation
  77. 872b or 6gj5a for a homebrew bass amp
  78. how does it sound and perform?
  79. Bootstrapped long tail
  80. Thorens TEM 3200 clone
  81. Identifying this RCA Transformer
  82. Tube burning
  83. Add Standby Directly after Rectifier, or After First Filter Stage?
  84. Help with some tube ID
  85. CCS power amp bias
  86. this is EL34 tube of what model?
  87. Looking for constructive criticism on my first design
  88. Audio note kit 1 vs Meishu
  89. Tube Amp Gain V.S. RF Gain
  90. Kool-mu material for building audio transformer
  91. Buzz/Hum in Matrix amplifier
  92. Optimation PA-250AC Lab-Grade Audio Amplifier
  93. RS1003 in SE triode-UL monoblocks
  94. Bypass capacitors in Tube amps
  95. Basic question re: gNFB around 3 stages
  96. James PP Audio Transformers, any good?
  97. Seeking advice for tube amp kit on,seems to be, chinese site
  98. Tube pricing from 1981
  99. 6e5p WCF headphone amp with no cap!
  100. "How it's made" vacuum tubes..
  101. Citation I and IV phono schematic query
  102. GS-4V High-mu russian triode for RIAA preamp
  103. good source for amp chassis in europe?
  104. Help identify and replacement of ? resistor
  105. New tube amp diy kit required power?
  106. Decoupling DC heater supply between valves..benefit?
  107. The Aikido Comedy: Straight Talk
  108. Recapping tube preamp questions
  109. A tube amp that's actually a tesla coil.
  110. Tube "Orientation"
  111. 18 watt tremolo vvr
  112. Pre amp output, would this work?
  113. Aikido Power Amp.....Possible??
  114. 12AX7 questions
  115. 6550 PUSH-PULL
  116. CCS at plate? Unknown schematic part
  117. Most odd grid choke behaviour.
  118. Spec for Altec TP-404 Transformer
  119. why do wimpy drivers for 2A3 work as well as they do?
  120. Seeking advice on Tube buffer / pre-amp
  121. 8x Push-pull KT88 class A in triode mode
  122. Tube Pre dull into Tube Amp - cause ?
  123. FINALLY I can start building my GM70
  124. Russian triodes ГИ-15Б arriving in a few days
  125. Cap or resistor
  126. KT88/PP driver confusion
  127. Simple SE GU-50
  128. Darling 1626
  129. 01a DHT Preamp
  130. Suitable tubes for Gomes output
  131. phono line stage project
  132. Whats wrong with this circuit?
  133. Any Newcomb Gurus.?
  134. Preamp Tube MU Level?
  135. SRPP Paraccordion topology ?
  136. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  137. Modification of a Chinese KT90 PP amplifier
  138. Tricky Headphone Amp design for AK4396
  139. How to know voltage bias adjustmentwith this data?
  140. Strange Stability Enhancement Trick
  141. has anyone bought tubes from http://www.tangotubes.com/
  142. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  143. Ever heard of British transofmer company "Ro"?
  144. A friend gave me some random tubes...
  145. Replacement for 6e2 without vu
  146. PP GU50 triode strapped project
  147. Tube VAS stage questions???
  148. OT impedance help: 9.8 vs 8k
  149. popping & crackling noise from restored valve AM radio
  150. Choosing 6550 PP Output Transformer
  151. Reversing Interstage Transformer
  152. Aikido 9 pin All in One Build
  153. KT88 PP UL Design Help Needed
  154. Cayin A-300B schematic needed
  155. Please Recommend a Preamp!
  156. Which Antek transforms to use
  157. Integrated Amp as Preamp and Subwoofer amp
  158. Uses for 715C Pulse Tetrode
  159. PP KT-88 w/866A MV HT Supply
  160. EC88 (6DL4) NOS Mullard - any use at all?
  161. Advice sought on thermionic headphone amp
  162. Eico HF-81: Input Selector bypass
  163. 12b4 bass rolloff problem
  164. No Right ch sound on yaqin mc10l
  165. tester causing bias to rise?
  166. Heaters & Filaments: AC vs. DC
  167. Old HP power transformers... need some wiring advice!
  168. RCA RS177H just dosen't sound right! Caps?
  169. silicon or tube rectifier in an EL34 SE
  170. Help original 300G LEGACY
  171. 813 Tube-Steak!
  172. Basic 12AU7 heatrr question
  173. Shipping a vacuum tube to China
  174. 6DJ8/ECC88-SRPP Tube Preamplifier
  175. Help needed: hum noise in Eimac 250TL driven by 75TL Single End Amplifier
  176. Found tons of Tubes,and many other parts
  177. EZ80 Data Sheets, R-Lim and Max Cap
  178. Filament Voltages CT vs Non-CT
  179. Troubleshooting help needed
  180. What is it? Tube guessology
  181. Bass & Treble controls, or rather lack of.
  182. Quicksilver 8417 Power Supply Question
  183. Why a sudden distortion in treble of this SET amplifier?
  184. Antitriode PP with EL34
  185. How to calculate Pout for Push Pull design
  186. Newbie Question - Power Transformer vs Isolation Transformer
  187. All tubes red plating
  188. Exceeding bias voltage?
  189. Vacuum State RTP Preamp Problem
  190. Alfred Morgan Tube Preamplifier
  191. 845 vs GM70
  192. Looking for project suggestions - 12au7 pre-amp?
  193. Contemporary tradition breaking amp schematics.
  194. ul - triode coupled screen grid resistor
  195. Optimum driver valve for an interstage-transformer-driven SE 300B
  196. 6C33C
  197. Soundcraftsmen 5050
  198. Tetra Phono Question
  199. WF tube
  200. Opt laminations isolation
  201. Heretical Source
  202. Broskie auto bias
  203. Heater Wiring - the Good the Bad and the Ugly
  204. Counterpoint SA5000 Help
  205. Problem with ECC83 measurement values - please help
  206. Newbie Bias help ?
  207. AV305m AVVT
  208. Pot mechanical resistance and restoration..
  209. HMV Little Nipper mantle radio = 1 STEREO
  210. What's the simplest way to adjust filament voltage?
  211. GDAP-06
  212. Audio Note L6 - Schematic?
  213. Preventing HV flashover on socket pins
  214. Best "Vintage" Stereo Pres that SoftClip and lotsa Harmonics
  215. SE with PP OPT's?
  216. 12ax7/12AT7 Recommendations
  217. HELP: Eimac 75TL amp high frequency roll off
  218. unison reserch s8, let's build it!
  219. Where do super high end companies get their transformers?
  220. Tube Tester Panel Meter
  221. Attic find AMP
  222. Help getting Imax and Eb approximations for a push-pull amp
  223. Is this amp OK to buy, or is this a problem?
  224. Swirling Harmonics, can it be described
  225. Line stage with u-follower and nfb
  226. Newbie looking for help, pre-out to tube amp.
  227. Unison research integrated ampliphier schematics
  228. FET CCS anode load and RFI/oscillation.
  229. Old schematic
  230. Newbie Looking for Replacement OPTS Motorola Console Amp
  231. Merlyn- May AudioXpress
  232. How to clean tubes?
  233. does the 3A5 have the stones to drive a 2A3?
  234. New amp: 13DE7 SE hybrid
  235. My amp is motorboating, improve it with b+ regulator ?
  236. Can you identify these amps?
  237. Sowter SA01 - anyone used it ?
  238. Mikael‑Abdellah‑SE‑KT88 Bias & Voltage readings Help?
  239. Resistors and combinations
  240. thr light in pcl82
  241. Bogen L330 - Worth restoring?
  242. Those Magnificent Television Tubes
  243. Demagnetizing OPT?
  244. Real DIY fun hybrid testing.
  245. Extreme hum in EQ output
  246. 46 triode-strapped DHT spice model
  247. SET output impedance vs speaker impedance
  248. Help with layout of tube preamp
  249. eico HF-65
  250. Wirewound bias pot problem.

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