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  1. 5879 to 12AX7 conversion
  2. CCDA SE output stage?
  3. Bravo V2 tube headphone amp - high pitched noise?
  4. Preamp Grounding Question
  5. SE on 300B
  6. musical paradise mp 301
  7. Newbie plan
  8. Can anybody identify this amp?
  9. Old RCA radio; can anyone ID this?
  10. Class AB2 - Kink, how and why?
  11. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  12. CCDA dissimilar triode preamp
  13. NOS NEGLECTED HIGH-END AUDIO TUBE
  14. GOSS C-core suppliers in UK/Europe
  15. Old radio -> tube amplifier
  16. Sowter 8650 in SE
  17. My Russian SET
  18. Raysonic vs. DIY tube amp?
  19. Which pins to use first?
  20. Bypass gain stage on K16LS amp
  21. Schematic help for a Pilot 505 amp please
  22. Question re: Distortion in triode gain stage
  23. Newbie needs help
  24. Marantz Model 9
  25. Is my power transformer bad?
  26. japanese 6v6 amp on youtube, anyone got the link?
  27. First attempt at tube amp.
  28. 6p3s,6N1P,6j1p
  29. 6bq5 p-p diagnosise
  30. MFA Lumi suddenly whistles (on bench)
  31. Pure tetrode and negative g2
  32. ECC85, EL84 tube amp please help.
  33. Pentode buffer.
  34. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  35. Help restoring old Maas-Rowe amp
  36. Early Sansui Valve Amp
  37. mismatched transformer impedance question.
  38. Second-hand or NOS tubes?
  39. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  40. Looking for High voltage double triode
  41. Will this ebay cover fit my Scott 272 integrated amp?
  42. My new find
  43. Thordarson Dual Tone Control
  44. samsung experiments with "tube sound"
  45. PP OPT design
  46. Heater voltage drops?
  47. WE448A data
  48. How come signal input capacitors are not on every amp?
  49. Any body can help to identify this pair of OPTs.
  50. Pre-amp for Tube Sound
  51. Audion tube amp capacitor questions
  52. Hello, looking for advice on a tube project...
  53. Is this speaker a good choice for Tube amps
  54. Suggestions for upgrading my first tube amp!
  55. Why does the Miniwatt N3 have 4 connections to its output transformers?
  56. Anyone know if there is an octal
  57. Cathode Follower, where is the 3d H gone?
  58. Sylvania 45C14M progress.
  59. Collins R-390 Audio Deck
  60. 2 stage 2A3 SET - why does the 6n6p sim so well?
  61. Hi Everyone! Your thoughts on my Yaqin dilemma
  62. Audioromy in Shanghai ?
  63. volume Pot noise
  64. Full Music 300B solid plate sound fine ?
  65. Removing cathode-bypass capacitors, and compensation
  66. Q: UL PP Instability - Anode Grid2 Snubber
  67. The Shuguang SG-50 really support 650V in the plates ???
  68. Addinging windings to an Antek AS-... transformer
  69. Supertex dn2540 CCS Rset trimmer value
  70. help with amp ohms
  71. First Kit
  72. High-End Tube preamp with ECC88
  73. ALERT! WARNING! J. SOUND LAB 300b
  74. Gott 30u tube amp (biggs of ca)
  75. Tips needed for some testing my newly built tube amp
  76. Need help for designing C3g pentode driver for 6b4g se
  77. another circuit idea
  78. EL41 PP triode strapped
  79. Odd-ball PI circuit identification request, and headroom question
  80. b+ Delay Arrangement for Power Amp
  81. Stackin' Chokes
  82. Source of IXYS 10m45s and other CCS devices
  83. Help identifing a 12ax7a
  84. EICO HF-60, rebuild and test
  85. Hum in homebuilt amp
  86. 845 Heater Power supply problems
  87. First Amp Build, (But not complete beginner to electronics)
  88. X10 V3 SERVICE MANUAL
  89. PP kt88 amp problem.
  90. How much power do I need?
  91. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  92. Adding CF to SRPP to lower output impedance?
  93. BCF build
  94. 12vac heater - dc elevated question -
  95. 6V6 VERIABLE TUBE REGULATED
  96. please help identify jennen tube amp.
  97. KEG-EAR 6L6-KT88 PP AUDIO AMP
  98. Aikido LV
  99. RH-84 voltages
  100. RIAA Tube Preamp Build (Part 1)
  101. Hybrid amplifier with ECC88(PCC88) + LM3875
  102. Triode and Input Transformer
  103. RH-84
  104. DL22N
  105. Single Tube Amp
  106. Antique radio info
  107. Alps & Panasonic pots (what's the dael? :: pics)
  108. Vintage GE Tube Amp
  109. Troubleshooting BIG hum problem. CJ CAV-50
  110. Impedance multiplier hybrid parafeed
  111. Crosley 68CR restore
  112. Question for EU diyaudio members
  113. need advises tweaking PSE 300B
  114. CounterPoint SA-12
  115. Bleeder Resistor for Choke Input Supply
  116. Large tube anode connections caps.
  117. Gyrators
  118. newbie questions about 300B tube amp
  119. EL84 SE advice for a beginner
  120. Re: Buffer with tube PCC88
  121. Transformer impedance calcs from windings
  122. Anyone came across AirTight ATM-2 schematic?
  123. Transmitter tube hybrid - Because why not?
  124. where is the output capacitor?
  125. Clarifications on role of pre VS power
  126. My poor man version of the Raven Preamplifier.
  127. GSG problem
  128. Transformer selection/brands
  129. Newbie DC heater help
  130. HF oscillation bursts at low ( < 40Hz) frequencies
  131. Why the GZ34 Rectifiers are so expensive!
  132. OPT designing?
  133. Looking for a DIY repair guy near Toledo or Ft. Wayne
  134. beginner: which DIY kit will go well with these drivers?
  135. Xindak MT-3
  136. Loudness controls
  137. Advice on replacing Yaqin MC-10L
  138. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  139. First Tube Help
  140. ampex 6793 stereo
  141. RCA Victrola 8V91
  142. what to do with these tubes? (6AQ5/6AR5)
  143. Sylvania 45C14M advice
  144. Re-designing 6DJ8 circuit for the 6CG7
  145. Hi fi kits
  146. bias capacitor
  147. Question re: Signal Ground versus HT ground
  148. Schematic to a friend
  149. Newbie question about transformers
  150. Request for suggestions. Akai M8 mono amp schematic validation.
  151. Rectifier
  152. Source for transformer parts?
  153. odd order harmonic squelching?
  154. Best Current Production 6550 / KT88
  155. Wharfedale W12 output transformers
  156. Are we committing suicide?! (Asbestos in vaccum tube base)
  157. Help me to Identify this Tube
  158. GU50 socket blues
  159. New 18W build el84/12ax7
  160. Why a follower in a parafeed triodeamp?
  161. Heads up for Australian tube amp diyers
  162. build new amp from 2 vintage tube amps?
  163. Sansui AU-111 rebuild and need some help
  164. Interstage/Input Transformer
  165. Ergo Ella PP Amplifier Wiring
  166. 6DX8/ECL84/6F3P Baby Huey
  167. Old tube amp info?
  168. MEIXING MING DA MC 2006 Phonostage schematics
  169. Just what the world needs - another EL84 amp
  170. Help me pick el34b tubes
  171. heathkit SA2
  172. Need help on RIAA
  173. GU50 plate curves
  174. What tube is this?
  175. Help with GZ34
  176. Need help in modifying Roberts 770 monoblocks
  177. PP and PPP
  178. ECL82 Single Tube Amp
  179. circuit idea
  180. Need Telefunken Hymnus 5438 Dial Glass
  181. Bias probes/Am I getting true readings
  182. How to measure output power
  183. Oddblock Wooden Case
  184. Amplifier Quandary
  185. Fuse blows instantly
  186. Looking for a fairly simple Hi gain tube pre amp project
  187. Best 2a3 PP OPT.
  188. Sharing cathode resistor and capacitor
  189. Power tubes in cascode for output section?
  190. good tube service tech in Los Angeles?
  191. Proposal for a new sticky thread
  192. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  193. PCF what?
  194. stupid question about heater wire to ground
  195. OTL All American Five? (or Ten)
  196. Scored a very nice H H Scott 272!
  197. Simple DIY Stereo Tube Amp with around 20W
  198. Maton Amp
  199. New Tech
  200. LS8 pre kit as an output stage for DAC?
  201. Japanese Valves
  202. B+ delay for DHT amp
  203. QQV03-20A/CV2799
  204. 0,22 0,33 0,47.....uF
  205. Most powerful SE DIY design?
  206. 420vdc supply for a tube amp
  207. PSE 2a3 operating points?
  208. Ju-Jutsu: The Ultimate Monoblock
  209. Looking for Phono Stage ...
  210. Finished my Fisher 460t-thanks
  211. Datasheet Cpk values
  212. Eico635 tester
  213. 6p3s...
  214. Help with Amp Salvage
  215. 808 SE Build
  216. how to bias my rebuilt dynaco st 70
  217. Want help - RCA Tube Manual RIAA Phono Stage
  218. Tube Pre-amp for both CD and Phono inputs
  219. Cascode Driver Oscillation
  220. 872b or 6gj5a for a homebrew bass amp
  221. how does it sound and perform?
  222. Bootstrapped long tail
  223. Thorens TEM 3200 clone
  224. Identifying this RCA Transformer
  225. Tube burning
  226. Add Standby Directly after Rectifier, or After First Filter Stage?
  227. Help with some tube ID
  228. CCS power amp bias
  229. this is EL34 tube of what model?
  230. Looking for constructive criticism on my first design
  231. Audio note kit 1 vs Meishu
  232. Tube Amp Gain V.S. RF Gain
  233. Kool-mu material for building audio transformer
  234. Buzz/Hum in Matrix amplifier
  235. Optimation PA-250AC Lab-Grade Audio Amplifier
  236. RS1003 in SE triode-UL monoblocks
  237. Bypass capacitors in Tube amps
  238. Basic question re: gNFB around 3 stages
  239. James PP Audio Transformers, any good?
  240. Seeking advice for tube amp kit on,seems to be, chinese site
  241. Tube pricing from 1981
  242. 6e5p WCF headphone amp with no cap!
  243. "How it's made" vacuum tubes..
  244. Citation I and IV phono schematic query
  245. GS-4V High-mu russian triode for RIAA preamp
  246. good source for amp chassis in europe?
  247. Help identify and replacement of ? resistor
  248. New tube amp diy kit required power?
  249. Decoupling DC heater supply between valves..benefit?
  250. The Aikido Comedy: Straight Talk

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