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  1. testing tubes
  2. current servo not voltage.
  3. Help Me, How to make Pre-amp using 12AU7 tube and Op-Amp Ic mix?
  4. 300b filament
  5. DHT SE auto bias circuit
  6. Anyone try swapping 6SN7 w/ 6F8G
  7. Eliminating Cathode Bypass Caps In SET Amplifier
  8. Nano vacuum tube
  9. Help High Line voltage
  10. Switchable Amp Output?
  11. PCB or hardwire?
  12. 27 line pre amplifier
  13. Mystery tubes on FB?
  14. amplifier discussion
  15. Mikael Abdellah KT88 SE with Cornet2
  16. 5879 to 12AX7 conversion
  17. CCDA SE output stage?
  18. Bravo V2 tube headphone amp - high pitched noise?
  19. Preamp Grounding Question
  20. SE on 300B
  21. musical paradise mp 301
  22. Newbie plan
  23. Capacitor Voltage rating Question
  24. Can anybody identify this amp?
  25. Old RCA radio; can anyone ID this?
  26. Class AB2 - Kink, how and why?
  27. 6SL7, 6J5, or 6SN7 unity gain buffer amp
  28. CCDA dissimilar triode preamp
  29. NOS NEGLECTED HIGH-END AUDIO TUBE
  30. GOSS C-core suppliers in UK/Europe
  31. Old radio -> tube amplifier
  32. Sowter 8650 in SE
  33. My Russian SET
  34. Raysonic vs. DIY tube amp?
  35. Which pins to use first?
  36. Bypass gain stage on K16LS amp
  37. Schematic help for a Pilot 505 amp please
  38. Question re: Distortion in triode gain stage
  39. Newbie needs help
  40. Marantz Model 9
  41. Is my power transformer bad?
  42. japanese 6v6 amp on youtube, anyone got the link?
  43. First attempt at tube amp.
  44. 6p3s,6N1P,6j1p
  45. 6bq5 p-p diagnosise
  46. MFA Lumi suddenly whistles (on bench)
  47. Pure tetrode and negative g2
  48. ECC85, EL84 tube amp please help.
  49. Pentode buffer.
  50. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  51. Help restoring old Maas-Rowe amp
  52. Early Sansui Valve Amp
  53. mismatched transformer impedance question.
  54. Second-hand or NOS tubes?
  55. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  56. Looking for High voltage double triode
  57. Will this ebay cover fit my Scott 272 integrated amp?
  58. My new find
  59. Thordarson Dual Tone Control
  60. samsung experiments with "tube sound"
  61. PP OPT design
  62. Heater voltage drops?
  63. WE448A data
  64. How come signal input capacitors are not on every amp?
  65. Any body can help to identify this pair of OPTs.
  66. tubelab SE component mounting
  67. Pre-amp for Tube Sound
  68. Audion tube amp capacitor questions
  69. Capacitor Substitution
  70. Hello, looking for advice on a tube project...
  71. Testing my Tube Tester
  72. Is this speaker a good choice for Tube amps
  73. Suggestions for upgrading my first tube amp!
  74. Why does the Miniwatt N3 have 4 connections to its output transformers?
  75. Anyone know if there is an octal
  76. Cathode Follower, where is the 3d H gone?
  77. Sylvania 45C14M progress.
  78. Collins R-390 Audio Deck
  79. 2 stage 2A3 SET - why does the 6n6p sim so well?
  80. Hi Everyone! Your thoughts on my Yaqin dilemma
  81. Audioromy in Shanghai ?
  82. volume Pot noise
  83. Full Music 300B solid plate sound fine ?
  84. Removing cathode-bypass capacitors, and compensation
  85. Q: UL PP Instability - Anode Grid2 Snubber
  86. The Shuguang SG-50 really support 650V in the plates ???
  87. Addinging windings to an Antek AS-... transformer
  88. Supertex dn2540 CCS Rset trimmer value
  89. help with amp ohms
  90. First Kit
  91. High-End Tube preamp with ECC88
  92. ALERT! WARNING! J. SOUND LAB 300b
  93. Gott 30u tube amp (biggs of ca)
  94. Tips needed for some testing my newly built tube amp
  95. Need help for designing C3g pentode driver for 6b4g se
  96. another circuit idea
  97. EL41 PP triode strapped
  98. Odd-ball PI circuit identification request, and headroom question
  99. b+ Delay Arrangement for Power Amp
  100. Stackin' Chokes
  101. Source of IXYS 10m45s and other CCS devices
  102. Help identifing a 12ax7a
  103. EICO HF-60, rebuild and test
  104. Hum in homebuilt amp
  105. 845 Heater Power supply problems
  106. Tubelab SE choke
  107. First Amp Build, (But not complete beginner to electronics)
  108. X10 V3 SERVICE MANUAL
  109. PP kt88 amp problem.
  110. How much power do I need?
  111. Hickok TV-7 D/U calibration
  112. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  113. Adding CF to SRPP to lower output impedance?
  114. BCF build
  115. 12vac heater - dc elevated question -
  116. 6V6 VERIABLE TUBE REGULATED
  117. please help identify jennen tube amp.
  118. Settings for ECC808 tube on 539c tester
  119. KEG-EAR 6L6-KT88 PP AUDIO AMP
  120. Aikido LV
  121. RH-84 voltages
  122. RIAA Tube Preamp Build (Part 1)
  123. Hybrid amplifier with ECC88(PCC88) + LM3875
  124. Triode and Input Transformer
  125. RH-84
  126. DL22N
  127. Single Tube Amp
  128. Antique radio info
  129. Alps & Panasonic pots (what's the dael? :: pics)
  130. Vintage GE Tube Amp
  131. Troubleshooting BIG hum problem. CJ CAV-50
  132. Impedance multiplier hybrid parafeed
  133. peavey heritage 212
  134. Crosley 68CR restore
  135. Question for EU diyaudio members
  136. need advises tweaking PSE 300B
  137. CounterPoint SA-12
  138. Bleeder Resistor for Choke Input Supply
  139. Large tube anode connections caps.
  140. Gyrators
  141. newbie questions about 300B tube amp
  142. EL84 SE advice for a beginner
  143. Re: Buffer with tube PCC88
  144. Transformer impedance calcs from windings
  145. Anyone came across AirTight ATM-2 schematic?
  146. Transmitter tube hybrid - Because why not?
  147. where is the output capacitor?
  148. Clarifications on role of pre VS power
  149. My poor man version of the Raven Preamplifier.
  150. GSG problem
  151. Transformer selection/brands
  152. Newbie DC heater help
  153. HF oscillation bursts at low ( < 40Hz) frequencies
  154. Why the GZ34 Rectifiers are so expensive!
  155. OPT designing?
  156. Looking for a DIY repair guy near Toledo or Ft. Wayne
  157. beginner: which DIY kit will go well with these drivers?
  158. Xindak MT-3
  159. Loudness controls
  160. Advice on replacing Yaqin MC-10L
  161. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  162. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  163. First Tube Help
  164. ampex 6793 stereo
  165. RCA Victrola 8V91
  166. what to do with these tubes? (6AQ5/6AR5)
  167. Sylvania 45C14M advice
  168. Re-designing 6DJ8 circuit for the 6CG7
  169. Hi fi kits
  170. bias capacitor
  171. Question re: Signal Ground versus HT ground
  172. Schematic to a friend
  173. Newbie question about transformers
  174. Request for suggestions. Akai M8 mono amp schematic validation.
  175. Rectifier
  176. Source for transformer parts?
  177. odd order harmonic squelching?
  178. Best Current Production 6550 / KT88
  179. Wharfedale W12 output transformers
  180. Are we committing suicide?! (Asbestos in vaccum tube base)
  181. Help me to Identify this Tube
  182. GU50 socket blues
  183. New 18W build el84/12ax7
  184. Why a follower in a parafeed triodeamp?
  185. Heads up for Australian tube amp diyers
  186. build new amp from 2 vintage tube amps?
  187. Sansui AU-111 rebuild and need some help
  188. Interstage/Input Transformer
  189. VALVEKING ROYAL8 with 6p14p-EV
  190. Ergo Ella PP Amplifier Wiring
  191. 6DX8/ECL84/6F3P Baby Huey
  192. Old tube amp info?
  193. MEIXING MING DA MC 2006 Phonostage schematics
  194. Problem with a Peavey Classic 50
  195. Just what the world needs - another EL84 amp
  196. Help me pick el34b tubes
  197. heathkit SA2
  198. Need help on RIAA
  199. GU50 plate curves
  200. What tube is this?
  201. Help with GZ34
  202. Need help in modifying Roberts 770 monoblocks
  203. PP and PPP
  204. ECL82 Single Tube Amp
  205. circuit idea
  206. Need Telefunken Hymnus 5438 Dial Glass
  207. Bias probes/Am I getting true readings
  208. How to measure output power
  209. Oddblock Wooden Case
  210. Amplifier Quandary
  211. Fuse blows instantly
  212. Looking for a fairly simple Hi gain tube pre amp project
  213. Best 2a3 PP OPT.
  214. Sharing cathode resistor and capacitor
  215. Power tubes in cascode for output section?
  216. good tube service tech in Los Angeles?
  217. Proposal for a new sticky thread
  218. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  219. PCF what?
  220. stupid question about heater wire to ground
  221. OTL All American Five? (or Ten)
  222. Scored a very nice H H Scott 272!
  223. Simple DIY Stereo Tube Amp with around 20W
  224. Maton Amp
  225. New Tech
  226. LS8 pre kit as an output stage for DAC?
  227. Japanese Valves
  228. B+ delay for DHT amp
  229. QQV03-20A/CV2799
  230. 0,22 0,33 0,47.....uF
  231. Most powerful SE DIY design?
  232. 420vdc supply for a tube amp
  233. PSE 2a3 operating points?
  234. Ju-Jutsu: The Ultimate Monoblock
  235. Looking for Phono Stage ...
  236. Finished my Fisher 460t-thanks
  237. Datasheet Cpk values
  238. Eico635 tester
  239. 6p3s...
  240. Help with Amp Salvage
  241. 808 SE Build
  242. how to bias my rebuilt dynaco st 70
  243. Want help - RCA Tube Manual RIAA Phono Stage
  244. Tube Pre-amp for both CD and Phono inputs
  245. Cascode Driver Oscillation
  246. 872b or 6gj5a for a homebrew bass amp
  247. how does it sound and perform?
  248. Bootstrapped long tail
  249. Thorens TEM 3200 clone
  250. Identifying this RCA Transformer

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