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  1. MFA Lumi suddenly whistles (on bench)
  2. Pure tetrode and negative g2
  3. ECC85, EL84 tube amp please help.
  4. Pentode buffer.
  5. 5k:8 ohm vs. 10k:16 ohm output transformer. What is the difference?
  6. Help restoring old Maas-Rowe amp
  7. Early Sansui Valve Amp
  8. mismatched transformer impedance question.
  9. Second-hand or NOS tubes?
  10. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  11. Looking for High voltage double triode
  12. Will this ebay cover fit my Scott 272 integrated amp?
  13. My new find
  14. Thordarson Dual Tone Control
  15. samsung experiments with "tube sound"
  16. PP OPT design
  17. Heater voltage drops?
  18. WE448A data
  19. How come signal input capacitors are not on every amp?
  20. Any body can help to identify this pair of OPTs.
  21. tubelab SE component mounting
  22. Pre-amp for Tube Sound
  23. Audion tube amp capacitor questions
  24. Capacitor Substitution
  25. Hello, looking for advice on a tube project...
  26. Testing my Tube Tester
  27. Is this speaker a good choice for Tube amps
  28. Suggestions for upgrading my first tube amp!
  29. Why does the Miniwatt N3 have 4 connections to its output transformers?
  30. Anyone know if there is an octal
  31. Cathode Follower, where is the 3d H gone?
  32. Sylvania 45C14M progress.
  33. Collins R-390 Audio Deck
  34. 2 stage 2A3 SET - why does the 6n6p sim so well?
  35. Hi Everyone! Your thoughts on my Yaqin dilemma
  36. Audioromy in Shanghai ?
  37. volume Pot noise
  38. Full Music 300B solid plate sound fine ?
  39. Removing cathode-bypass capacitors, and compensation
  40. Q: UL PP Instability - Anode Grid2 Snubber
  41. The Shuguang SG-50 really support 650V in the plates ???
  42. Addinging windings to an Antek AS-... transformer
  43. Supertex dn2540 CCS Rset trimmer value
  44. help with amp ohms
  45. First Kit
  46. High-End Tube preamp with ECC88
  47. ALERT! WARNING! J. SOUND LAB 300b
  48. Gott 30u tube amp (biggs of ca)
  49. Tips needed for some testing my newly built tube amp
  50. Need help for designing C3g pentode driver for 6b4g se
  51. another circuit idea
  52. EL41 PP triode strapped
  53. Odd-ball PI circuit identification request, and headroom question
  54. b+ Delay Arrangement for Power Amp
  55. Stackin' Chokes
  56. Source of IXYS 10m45s and other CCS devices
  57. Help identifing a 12ax7a
  58. EICO HF-60, rebuild and test
  59. Hum in homebuilt amp
  60. 845 Heater Power supply problems
  61. Tubelab SE choke
  62. First Amp Build, (But not complete beginner to electronics)
  63. X10 V3 SERVICE MANUAL
  64. PP kt88 amp problem.
  65. How much power do I need?
  66. Hickok TV-7 D/U calibration
  67. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  68. Adding CF to SRPP to lower output impedance?
  69. BCF build
  70. 12vac heater - dc elevated question -
  71. 6V6 VERIABLE TUBE REGULATED
  72. please help identify jennen tube amp.
  73. Settings for ECC808 tube on 539c tester
  74. KEG-EAR 6L6-KT88 PP AUDIO AMP
  75. Aikido LV
  76. RH-84 voltages
  77. RIAA Tube Preamp Build (Part 1)
  78. Hybrid amplifier with ECC88(PCC88) + LM3875
  79. Triode and Input Transformer
  80. RH-84
  81. DL22N
  82. Single Tube Amp
  83. Antique radio info
  84. Alps & Panasonic pots (what's the dael? :: pics)
  85. Vintage GE Tube Amp
  86. Troubleshooting BIG hum problem. CJ CAV-50
  87. Impedance multiplier hybrid parafeed
  88. peavey heritage 212
  89. Crosley 68CR restore
  90. Question for EU diyaudio members
  91. need advises tweaking PSE 300B
  92. CounterPoint SA-12
  93. Bleeder Resistor for Choke Input Supply
  94. Large tube anode connections caps.
  95. Gyrators
  96. newbie questions about 300B tube amp
  97. EL84 SE advice for a beginner
  98. Re: Buffer with tube PCC88
  99. Transformer impedance calcs from windings
  100. Anyone came across AirTight ATM-2 schematic?
  101. Transmitter tube hybrid - Because why not?
  102. where is the output capacitor?
  103. Clarifications on role of pre VS power
  104. My poor man version of the Raven Preamplifier.
  105. GSG problem
  106. Transformer selection/brands
  107. Newbie DC heater help
  108. HF oscillation bursts at low ( < 40Hz) frequencies
  109. Why the GZ34 Rectifiers are so expensive!
  110. OPT designing?
  111. Looking for a DIY repair guy near Toledo or Ft. Wayne
  112. beginner: which DIY kit will go well with these drivers?
  113. Xindak MT-3
  114. Loudness controls
  115. Advice on replacing Yaqin MC-10L
  116. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  117. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  118. First Tube Help
  119. ampex 6793 stereo
  120. RCA Victrola 8V91
  121. what to do with these tubes? (6AQ5/6AR5)
  122. Sylvania 45C14M advice
  123. Re-designing 6DJ8 circuit for the 6CG7
  124. Hi fi kits
  125. bias capacitor
  126. Question re: Signal Ground versus HT ground
  127. Schematic to a friend
  128. Newbie question about transformers
  129. Request for suggestions. Akai M8 mono amp schematic validation.
  130. Rectifier
  131. Source for transformer parts?
  132. odd order harmonic squelching?
  133. Best Current Production 6550 / KT88
  134. Wharfedale W12 output transformers
  135. Are we committing suicide?! (Asbestos in vaccum tube base)
  136. Help me to Identify this Tube
  137. GU50 socket blues
  138. New 18W build el84/12ax7
  139. Why a follower in a parafeed triodeamp?
  140. Heads up for Australian tube amp diyers
  141. build new amp from 2 vintage tube amps?
  142. Sansui AU-111 rebuild and need some help
  143. Interstage/Input Transformer
  144. VALVEKING ROYAL8 with 6p14p-EV
  145. Ergo Ella PP Amplifier Wiring
  146. 6DX8/ECL84/6F3P Baby Huey
  147. Old tube amp info?
  148. MEIXING MING DA MC 2006 Phonostage schematics
  149. Problem with a Peavey Classic 50
  150. Just what the world needs - another EL84 amp
  151. Help me pick el34b tubes
  152. heathkit SA2
  153. Need help on RIAA
  154. GU50 plate curves
  155. What tube is this?
  156. Help with GZ34
  157. Need help in modifying Roberts 770 monoblocks
  158. PP and PPP
  159. ECL82 Single Tube Amp
  160. circuit idea
  161. Need Telefunken Hymnus 5438 Dial Glass
  162. Bias probes/Am I getting true readings
  163. How to measure output power
  164. Oddblock Wooden Case
  165. Amplifier Quandary
  166. Fuse blows instantly
  167. Looking for a fairly simple Hi gain tube pre amp project
  168. Best 2a3 PP OPT.
  169. Sharing cathode resistor and capacitor
  170. Power tubes in cascode for output section?
  171. good tube service tech in Los Angeles?
  172. Proposal for a new sticky thread
  173. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  174. PCF what?
  175. stupid question about heater wire to ground
  176. OTL All American Five? (or Ten)
  177. Scored a very nice H H Scott 272!
  178. Simple DIY Stereo Tube Amp with around 20W
  179. Maton Amp
  180. New Tech
  181. LS8 pre kit as an output stage for DAC?
  182. Japanese Valves
  183. B+ delay for DHT amp
  184. QQV03-20A/CV2799
  185. 0,22 0,33 0,47.....uF
  186. Most powerful SE DIY design?
  187. 420vdc supply for a tube amp
  188. PSE 2a3 operating points?
  189. Ju-Jutsu: The Ultimate Monoblock
  190. Looking for Phono Stage ...
  191. Finished my Fisher 460t-thanks
  192. Datasheet Cpk values
  193. Eico635 tester
  194. 6p3s...
  195. Help with Amp Salvage
  196. 808 SE Build
  197. how to bias my rebuilt dynaco st 70
  198. Want help - RCA Tube Manual RIAA Phono Stage
  199. Tube Pre-amp for both CD and Phono inputs
  200. Cascode Driver Oscillation
  201. 872b or 6gj5a for a homebrew bass amp
  202. how does it sound and perform?
  203. Bootstrapped long tail
  204. Thorens TEM 3200 clone
  205. Identifying this RCA Transformer
  206. Tube burning
  207. Add Standby Directly after Rectifier, or After First Filter Stage?
  208. Help with some tube ID
  209. CCS power amp bias
  210. this is EL34 tube of what model?
  211. Looking for constructive criticism on my first design
  212. Audio note kit 1 vs Meishu
  213. Tube Amp Gain V.S. RF Gain
  214. Kool-mu material for building audio transformer
  215. Buzz/Hum in Matrix amplifier
  216. Optimation PA-250AC Lab-Grade Audio Amplifier
  217. RS1003 in SE triode-UL monoblocks
  218. Bypass capacitors in Tube amps
  219. Basic question re: gNFB around 3 stages
  220. James PP Audio Transformers, any good?
  221. Seeking advice for tube amp kit on,seems to be, chinese site
  222. Tube pricing from 1981
  223. 6e5p WCF headphone amp with no cap!
  224. "How it's made" vacuum tubes..
  225. Citation I and IV phono schematic query
  226. GS-4V High-mu russian triode for RIAA preamp
  227. good source for amp chassis in europe?
  228. Help identify and replacement of ? resistor
  229. New tube amp diy kit required power?
  230. Decoupling DC heater supply between valves..benefit?
  231. The Aikido Comedy: Straight Talk
  232. Recapping tube preamp questions
  233. A tube amp that's actually a tesla coil.
  234. Tube "Orientation"
  235. 18 watt tremolo vvr
  236. Pre amp output, would this work?
  237. Aikido Power Amp.....Possible??
  238. 12AX7 questions
  239. 6550 PUSH-PULL
  240. CCS at plate? Unknown schematic part
  241. Most odd grid choke behaviour.
  242. Spec for Altec TP-404 Transformer
  243. why do wimpy drivers for 2A3 work as well as they do?
  244. Seeking advice on Tube buffer / pre-amp
  245. 8x Push-pull KT88 class A in triode mode
  246. Tube Pre dull into Tube Amp - cause ?
  247. FINALLY I can start building my GM70
  248. Russian triodes ГИ-15Б arriving in a few days
  249. Cap or resistor
  250. KT88/PP driver confusion

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