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  1. mismatched transformer impedance question.
  2. Second-hand or NOS tubes?
  3. Any suggestion for a 12AT7 / ECC81 SRPP powerstage ?
  4. Looking for High voltage double triode
  5. Will this ebay cover fit my Scott 272 integrated amp?
  6. My new find
  7. Thordarson Dual Tone Control
  8. samsung experiments with "tube sound"
  9. PP OPT design
  10. Heater voltage drops?
  11. WE448A data
  12. How come signal input capacitors are not on every amp?
  13. Any body can help to identify this pair of OPTs.
  14. tubelab SE component mounting
  15. Pre-amp for Tube Sound
  16. Audion tube amp capacitor questions
  17. Capacitor Substitution
  18. Hello, looking for advice on a tube project...
  19. Testing my Tube Tester
  20. Is this speaker a good choice for Tube amps
  21. Suggestions for upgrading my first tube amp!
  22. Why does the Miniwatt N3 have 4 connections to its output transformers?
  23. Anyone know if there is an octal
  24. Cathode Follower, where is the 3d H gone?
  25. Sylvania 45C14M progress.
  26. Collins R-390 Audio Deck
  27. 2 stage 2A3 SET - why does the 6n6p sim so well?
  28. Hi Everyone! Your thoughts on my Yaqin dilemma
  29. Audioromy in Shanghai ?
  30. volume Pot noise
  31. Full Music 300B solid plate sound fine ?
  32. Removing cathode-bypass capacitors, and compensation
  33. Q: UL PP Instability - Anode Grid2 Snubber
  34. The Shuguang SG-50 really support 650V in the plates ???
  35. Addinging windings to an Antek AS-... transformer
  36. Supertex dn2540 CCS Rset trimmer value
  37. help with amp ohms
  38. First Kit
  39. High-End Tube preamp with ECC88
  40. ALERT! WARNING! J. SOUND LAB 300b
  41. Gott 30u tube amp (biggs of ca)
  42. Tips needed for some testing my newly built tube amp
  43. Need help for designing C3g pentode driver for 6b4g se
  44. another circuit idea
  45. EL41 PP triode strapped
  46. Odd-ball PI circuit identification request, and headroom question
  47. b+ Delay Arrangement for Power Amp
  48. Stackin' Chokes
  49. Source of IXYS 10m45s and other CCS devices
  50. Help identifing a 12ax7a
  51. EICO HF-60, rebuild and test
  52. Hum in homebuilt amp
  53. 845 Heater Power supply problems
  54. Tubelab SE choke
  55. First Amp Build, (But not complete beginner to electronics)
  56. X10 V3 SERVICE MANUAL
  57. PP kt88 amp problem.
  58. How much power do I need?
  59. Hickok TV-7 D/U calibration
  60. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  61. Adding CF to SRPP to lower output impedance?
  62. BCF build
  63. 12vac heater - dc elevated question -
  64. 6V6 VERIABLE TUBE REGULATED
  65. please help identify jennen tube amp.
  66. Settings for ECC808 tube on 539c tester
  67. KEG-EAR 6L6-KT88 PP AUDIO AMP
  68. Aikido LV
  69. RH-84 voltages
  70. RIAA Tube Preamp Build (Part 1)
  71. Hybrid amplifier with ECC88(PCC88) + LM3875
  72. Triode and Input Transformer
  73. RH-84
  74. DL22N
  75. Single Tube Amp
  76. Antique radio info
  77. Alps & Panasonic pots (what's the dael? :: pics)
  78. Vintage GE Tube Amp
  79. Troubleshooting BIG hum problem. CJ CAV-50
  80. Impedance multiplier hybrid parafeed
  81. peavey heritage 212
  82. Crosley 68CR restore
  83. Question for EU diyaudio members
  84. need advises tweaking PSE 300B
  85. CounterPoint SA-12
  86. Bleeder Resistor for Choke Input Supply
  87. Large tube anode connections caps.
  88. Gyrators
  89. newbie questions about 300B tube amp
  90. EL84 SE advice for a beginner
  91. Re: Buffer with tube PCC88
  92. Transformer impedance calcs from windings
  93. Anyone came across AirTight ATM-2 schematic?
  94. Transmitter tube hybrid - Because why not?
  95. where is the output capacitor?
  96. Clarifications on role of pre VS power
  97. My poor man version of the Raven Preamplifier.
  98. GSG problem
  99. Transformer selection/brands
  100. Newbie DC heater help
  101. HF oscillation bursts at low ( < 40Hz) frequencies
  102. Why the GZ34 Rectifiers are so expensive!
  103. OPT designing?
  104. Looking for a DIY repair guy near Toledo or Ft. Wayne
  105. beginner: which DIY kit will go well with these drivers?
  106. Xindak MT-3
  107. Loudness controls
  108. Advice on replacing Yaqin MC-10L
  109. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  110. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  111. First Tube Help
  112. ampex 6793 stereo
  113. RCA Victrola 8V91
  114. what to do with these tubes? (6AQ5/6AR5)
  115. Sylvania 45C14M advice
  116. Re-designing 6DJ8 circuit for the 6CG7
  117. Hi fi kits
  118. bias capacitor
  119. Question re: Signal Ground versus HT ground
  120. Schematic to a friend
  121. Newbie question about transformers
  122. Request for suggestions. Akai M8 mono amp schematic validation.
  123. Rectifier
  124. Source for transformer parts?
  125. odd order harmonic squelching?
  126. Best Current Production 6550 / KT88
  127. Wharfedale W12 output transformers
  128. Are we committing suicide?! (Asbestos in vaccum tube base)
  129. Help me to Identify this Tube
  130. GU50 socket blues
  131. New 18W build el84/12ax7
  132. Why a follower in a parafeed triodeamp?
  133. Heads up for Australian tube amp diyers
  134. build new amp from 2 vintage tube amps?
  135. Sansui AU-111 rebuild and need some help
  136. Interstage/Input Transformer
  137. VALVEKING ROYAL8 with 6p14p-EV
  138. Ergo Ella PP Amplifier Wiring
  139. 6DX8/ECL84/6F3P Baby Huey
  140. Old tube amp info?
  141. MEIXING MING DA MC 2006 Phonostage schematics
  142. Problem with a Peavey Classic 50
  143. Just what the world needs - another EL84 amp
  144. Help me pick el34b tubes
  145. heathkit SA2
  146. Need help on RIAA
  147. GU50 plate curves
  148. What tube is this?
  149. Help with GZ34
  150. Need help in modifying Roberts 770 monoblocks
  151. PP and PPP
  152. ECL82 Single Tube Amp
  153. circuit idea
  154. Need Telefunken Hymnus 5438 Dial Glass
  155. Bias probes/Am I getting true readings
  156. How to measure output power
  157. Oddblock Wooden Case
  158. Amplifier Quandary
  159. Fuse blows instantly
  160. Looking for a fairly simple Hi gain tube pre amp project
  161. Best 2a3 PP OPT.
  162. Sharing cathode resistor and capacitor
  163. Power tubes in cascode for output section?
  164. good tube service tech in Los Angeles?
  165. Proposal for a new sticky thread
  166. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  167. PCF what?
  168. stupid question about heater wire to ground
  169. OTL All American Five? (or Ten)
  170. Scored a very nice H H Scott 272!
  171. Simple DIY Stereo Tube Amp with around 20W
  172. Maton Amp
  173. New Tech
  174. LS8 pre kit as an output stage for DAC?
  175. Japanese Valves
  176. B+ delay for DHT amp
  177. QQV03-20A/CV2799
  178. 0,22 0,33 0,47.....uF
  179. Most powerful SE DIY design?
  180. 420vdc supply for a tube amp
  181. PSE 2a3 operating points?
  182. Ju-Jutsu: The Ultimate Monoblock
  183. Looking for Phono Stage ...
  184. Finished my Fisher 460t-thanks
  185. Datasheet Cpk values
  186. Eico635 tester
  187. 6p3s...
  188. Help with Amp Salvage
  189. 808 SE Build
  190. how to bias my rebuilt dynaco st 70
  191. Want help - RCA Tube Manual RIAA Phono Stage
  192. Tube Pre-amp for both CD and Phono inputs
  193. Cascode Driver Oscillation
  194. 872b or 6gj5a for a homebrew bass amp
  195. how does it sound and perform?
  196. Bootstrapped long tail
  197. Thorens TEM 3200 clone
  198. Identifying this RCA Transformer
  199. Tube burning
  200. Add Standby Directly after Rectifier, or After First Filter Stage?
  201. Help with some tube ID
  202. CCS power amp bias
  203. this is EL34 tube of what model?
  204. Looking for constructive criticism on my first design
  205. Audio note kit 1 vs Meishu
  206. Tube Amp Gain V.S. RF Gain
  207. Kool-mu material for building audio transformer
  208. Buzz/Hum in Matrix amplifier
  209. Optimation PA-250AC Lab-Grade Audio Amplifier
  210. RS1003 in SE triode-UL monoblocks
  211. Bypass capacitors in Tube amps
  212. Basic question re: gNFB around 3 stages
  213. James PP Audio Transformers, any good?
  214. Seeking advice for tube amp kit on,seems to be, chinese site
  215. Tube pricing from 1981
  216. 6e5p WCF headphone amp with no cap!
  217. "How it's made" vacuum tubes..
  218. Citation I and IV phono schematic query
  219. GS-4V High-mu russian triode for RIAA preamp
  220. good source for amp chassis in europe?
  221. Help identify and replacement of ? resistor
  222. New tube amp diy kit required power?
  223. Decoupling DC heater supply between valves..benefit?
  224. The Aikido Comedy: Straight Talk
  225. Recapping tube preamp questions
  226. A tube amp that's actually a tesla coil.
  227. Tube "Orientation"
  228. 18 watt tremolo vvr
  229. Pre amp output, would this work?
  230. Aikido Power Amp.....Possible??
  231. 12AX7 questions
  232. 6550 PUSH-PULL
  233. CCS at plate? Unknown schematic part
  234. Most odd grid choke behaviour.
  235. Spec for Altec TP-404 Transformer
  236. why do wimpy drivers for 2A3 work as well as they do?
  237. Seeking advice on Tube buffer / pre-amp
  238. 8x Push-pull KT88 class A in triode mode
  239. Tube Pre dull into Tube Amp - cause ?
  240. FINALLY I can start building my GM70
  241. Russian triodes ГИ-15Б arriving in a few days
  242. Cap or resistor
  243. KT88/PP driver confusion
  244. Simple SE GU-50
  245. Darling 1626
  246. 01a DHT Preamp
  247. Suitable tubes for Gomes output
  248. phono line stage project
  249. Whats wrong with this circuit?
  250. Any Newcomb Gurus.?

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