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  1. PCB or hardwire?
  2. 27 line pre amplifier
  3. Mystery tubes on FB?
  4. amplifier discussion
  5. Mikael Abdellah KT88 SE with Cornet2
  6. 5879 to 12AX7 conversion
  7. CCDA SE output stage?
  8. Bravo V2 tube headphone amp - high pitched noise?
  9. Preamp Grounding Question
  10. SE on 300B
  11. musical paradise mp 301
  12. Newbie plan
  13. Capacitor Voltage rating Question
  14. Can anybody identify this amp?
  15. Old RCA radio; can anyone ID this?
  16. Class AB2 - Kink, how and why?
  17. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  18. CCDA dissimilar triode preamp
  19. NOS NEGLECTED HIGH-END AUDIO TUBE
  20. GOSS C-core suppliers in UK/Europe
  21. Old radio -> tube amplifier
  22. Sowter 8650 in SE
  23. My Russian SET
  24. Raysonic vs. DIY tube amp?
  25. Which pins to use first?
  26. Bypass gain stage on K16LS amp
  27. Schematic help for a Pilot 505 amp please
  28. Question re: Distortion in triode gain stage
  29. Newbie needs help
  30. Marantz Model 9
  31. Is my power transformer bad?
  32. japanese 6v6 amp on youtube, anyone got the link?
  33. First attempt at tube amp.
  34. 6p3s,6N1P,6j1p
  35. 6bq5 p-p diagnosise
  36. MFA Lumi suddenly whistles (on bench)
  37. Pure tetrode and negative g2
  38. ECC85, EL84 tube amp please help.
  39. Pentode buffer.
  40. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  41. Help restoring old Maas-Rowe amp
  42. Early Sansui Valve Amp
  43. mismatched transformer impedance question.
  44. Second-hand or NOS tubes?
  45. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  46. Looking for High voltage double triode
  47. Will this ebay cover fit my Scott 272 integrated amp?
  48. My new find
  49. Thordarson Dual Tone Control
  50. samsung experiments with "tube sound"
  51. PP OPT design
  52. Heater voltage drops?
  53. WE448A data
  54. How come signal input capacitors are not on every amp?
  55. Any body can help to identify this pair of OPTs.
  56. tubelab SE component mounting
  57. Pre-amp for Tube Sound
  58. Audion tube amp capacitor questions
  59. Capacitor Substitution
  60. Hello, looking for advice on a tube project...
  61. Testing my Tube Tester
  62. Is this speaker a good choice for Tube amps
  63. Suggestions for upgrading my first tube amp!
  64. Why does the Miniwatt N3 have 4 connections to its output transformers?
  65. Anyone know if there is an octal
  66. Cathode Follower, where is the 3d H gone?
  67. Sylvania 45C14M progress.
  68. Collins R-390 Audio Deck
  69. 2 stage 2A3 SET - why does the 6n6p sim so well?
  70. Hi Everyone! Your thoughts on my Yaqin dilemma
  71. Audioromy in Shanghai ?
  72. volume Pot noise
  73. Full Music 300B solid plate sound fine ?
  74. Removing cathode-bypass capacitors, and compensation
  75. Q: UL PP Instability - Anode Grid2 Snubber
  76. The Shuguang SG-50 really support 650V in the plates ???
  77. Addinging windings to an Antek AS-... transformer
  78. Supertex dn2540 CCS Rset trimmer value
  79. help with amp ohms
  80. First Kit
  81. High-End Tube preamp with ECC88
  82. ALERT! WARNING! J. SOUND LAB 300b
  83. Gott 30u tube amp (biggs of ca)
  84. Tips needed for some testing my newly built tube amp
  85. Need help for designing C3g pentode driver for 6b4g se
  86. another circuit idea
  87. EL41 PP triode strapped
  88. Odd-ball PI circuit identification request, and headroom question
  89. b+ Delay Arrangement for Power Amp
  90. Stackin' Chokes
  91. Source of IXYS 10m45s and other CCS devices
  92. Help identifing a 12ax7a
  93. EICO HF-60, rebuild and test
  94. Hum in homebuilt amp
  95. 845 Heater Power supply problems
  96. Tubelab SE choke
  97. First Amp Build, (But not complete beginner to electronics)
  98. X10 V3 SERVICE MANUAL
  99. PP kt88 amp problem.
  100. How much power do I need?
  101. Hickok TV-7 D/U calibration
  102. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  103. Adding CF to SRPP to lower output impedance?
  104. BCF build
  105. 12vac heater - dc elevated question -
  106. 6V6 VERIABLE TUBE REGULATED
  107. please help identify jennen tube amp.
  108. Settings for ECC808 tube on 539c tester
  109. KEG-EAR 6L6-KT88 PP AUDIO AMP
  110. Aikido LV
  111. RH-84 voltages
  112. RIAA Tube Preamp Build (Part 1)
  113. Hybrid amplifier with ECC88(PCC88) + LM3875
  114. Triode and Input Transformer
  115. RH-84
  116. DL22N
  117. Single Tube Amp
  118. Antique radio info
  119. Alps & Panasonic pots (what's the dael? :: pics)
  120. Vintage GE Tube Amp
  121. Troubleshooting BIG hum problem. CJ CAV-50
  122. Impedance multiplier hybrid parafeed
  123. Crosley 68CR restore
  124. Question for EU diyaudio members
  125. need advises tweaking PSE 300B
  126. CounterPoint SA-12
  127. Bleeder Resistor for Choke Input Supply
  128. Large tube anode connections caps.
  129. Gyrators
  130. newbie questions about 300B tube amp
  131. EL84 SE advice for a beginner
  132. Re: Buffer with tube PCC88
  133. Transformer impedance calcs from windings
  134. Anyone came across AirTight ATM-2 schematic?
  135. Transmitter tube hybrid - Because why not?
  136. where is the output capacitor?
  137. Clarifications on role of pre VS power
  138. My poor man version of the Raven Preamplifier.
  139. GSG problem
  140. Transformer selection/brands
  141. Newbie DC heater help
  142. HF oscillation bursts at low ( < 40Hz) frequencies
  143. Why the GZ34 Rectifiers are so expensive!
  144. OPT designing?
  145. Looking for a DIY repair guy near Toledo or Ft. Wayne
  146. beginner: which DIY kit will go well with these drivers?
  147. Xindak MT-3
  148. Loudness controls
  149. Advice on replacing Yaqin MC-10L
  150. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  151. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  152. First Tube Help
  153. ampex 6793 stereo
  154. RCA Victrola 8V91
  155. what to do with these tubes? (6AQ5/6AR5)
  156. Sylvania 45C14M advice
  157. Re-designing 6DJ8 circuit for the 6CG7
  158. Hi fi kits
  159. bias capacitor
  160. Question re: Signal Ground versus HT ground
  161. Schematic to a friend
  162. Newbie question about transformers
  163. Request for suggestions. Akai M8 mono amp schematic validation.
  164. Rectifier
  165. Source for transformer parts?
  166. odd order harmonic squelching?
  167. Best Current Production 6550 / KT88
  168. Wharfedale W12 output transformers
  169. Are we committing suicide?! (Asbestos in vaccum tube base)
  170. Help me to Identify this Tube
  171. GU50 socket blues
  172. New 18W build el84/12ax7
  173. Why a follower in a parafeed triodeamp?
  174. Heads up for Australian tube amp diyers
  175. build new amp from 2 vintage tube amps?
  176. Sansui AU-111 rebuild and need some help
  177. Interstage/Input Transformer
  178. VALVEKING ROYAL8 with 6p14p-EV
  179. Ergo Ella PP Amplifier Wiring
  180. 6DX8/ECL84/6F3P Baby Huey
  181. Old tube amp info?
  182. MEIXING MING DA MC 2006 Phonostage schematics
  183. Just what the world needs - another EL84 amp
  184. Help me pick el34b tubes
  185. heathkit SA2
  186. Need help on RIAA
  187. GU50 plate curves
  188. What tube is this?
  189. Help with GZ34
  190. Need help in modifying Roberts 770 monoblocks
  191. PP and PPP
  192. ECL82 Single Tube Amp
  193. circuit idea
  194. Need Telefunken Hymnus 5438 Dial Glass
  195. Bias probes/Am I getting true readings
  196. How to measure output power
  197. Oddblock Wooden Case
  198. Amplifier Quandary
  199. Fuse blows instantly
  200. Looking for a fairly simple Hi gain tube pre amp project
  201. Best 2a3 PP OPT.
  202. Sharing cathode resistor and capacitor
  203. Power tubes in cascode for output section?
  204. good tube service tech in Los Angeles?
  205. Proposal for a new sticky thread
  206. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  207. PCF what?
  208. stupid question about heater wire to ground
  209. OTL All American Five? (or Ten)
  210. Scored a very nice H H Scott 272!
  211. Simple DIY Stereo Tube Amp with around 20W
  212. Maton Amp
  213. New Tech
  214. LS8 pre kit as an output stage for DAC?
  215. Japanese Valves
  216. B+ delay for DHT amp
  217. QQV03-20A/CV2799
  218. 0,22 0,33 0,47.....uF
  219. Most powerful SE DIY design?
  220. 420vdc supply for a tube amp
  221. PSE 2a3 operating points?
  222. Ju-Jutsu: The Ultimate Monoblock
  223. Looking for Phono Stage ...
  224. Finished my Fisher 460t-thanks
  225. Datasheet Cpk values
  226. Eico635 tester
  227. 6p3s...
  228. Help with Amp Salvage
  229. 808 SE Build
  230. how to bias my rebuilt dynaco st 70
  231. Want help - RCA Tube Manual RIAA Phono Stage
  232. Tube Pre-amp for both CD and Phono inputs
  233. Cascode Driver Oscillation
  234. 872b or 6gj5a for a homebrew bass amp
  235. how does it sound and perform?
  236. Bootstrapped long tail
  237. Thorens TEM 3200 clone
  238. Identifying this RCA Transformer
  239. Tube burning
  240. Add Standby Directly after Rectifier, or After First Filter Stage?
  241. Help with some tube ID
  242. CCS power amp bias
  243. this is EL34 tube of what model?
  244. Looking for constructive criticism on my first design
  245. Audio note kit 1 vs Meishu
  246. Tube Amp Gain V.S. RF Gain
  247. Kool-mu material for building audio transformer
  248. Buzz/Hum in Matrix amplifier
  249. Optimation PA-250AC Lab-Grade Audio Amplifier
  250. RS1003 in SE triode-UL monoblocks

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