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  1. Pre-amp for Tube Sound
  2. Audion tube amp capacitor questions
  3. Capacitor Substitution
  4. Hello, looking for advice on a tube project...
  5. Testing my Tube Tester
  6. Is this speaker a good choice for Tube amps
  7. Suggestions for upgrading my first tube amp!
  8. Why does the Miniwatt N3 have 4 connections to its output transformers?
  9. Anyone know if there is an octal
  10. Cathode Follower, where is the 3d H gone?
  11. Sylvania 45C14M progress.
  12. Collins R-390 Audio Deck
  13. 2 stage 2A3 SET - why does the 6n6p sim so well?
  14. Hi Everyone! Your thoughts on my Yaqin dilemma
  15. Audioromy in Shanghai ?
  16. volume Pot noise
  17. Full Music 300B solid plate sound fine ?
  18. Removing cathode-bypass capacitors, and compensation
  19. Q: UL PP Instability - Anode Grid2 Snubber
  20. The Shuguang SG-50 really support 650V in the plates ???
  21. Addinging windings to an Antek AS-... transformer
  22. Supertex dn2540 CCS Rset trimmer value
  23. help with amp ohms
  24. First Kit
  25. High-End Tube preamp with ECC88
  26. ALERT! WARNING! J. SOUND LAB 300b
  27. Gott 30u tube amp (biggs of ca)
  28. Tips needed for some testing my newly built tube amp
  29. Need help for designing C3g pentode driver for 6b4g se
  30. another circuit idea
  31. EL41 PP triode strapped
  32. Odd-ball PI circuit identification request, and headroom question
  33. b+ Delay Arrangement for Power Amp
  34. Stackin' Chokes
  35. Source of IXYS 10m45s and other CCS devices
  36. Help identifing a 12ax7a
  37. EICO HF-60, rebuild and test
  38. Hum in homebuilt amp
  39. 845 Heater Power supply problems
  40. Tubelab SE choke
  41. First Amp Build, (But not complete beginner to electronics)
  42. X10 V3 SERVICE MANUAL
  43. PP kt88 amp problem.
  44. How much power do I need?
  45. Hickok TV-7 D/U calibration
  46. 12 VAC for both AC heaters and DC B+ via voltage doubler?
  47. Adding CF to SRPP to lower output impedance?
  48. BCF build
  49. 12vac heater - dc elevated question -
  50. 6V6 VERIABLE TUBE REGULATED
  51. please help identify jennen tube amp.
  52. Settings for ECC808 tube on 539c tester
  53. KEG-EAR 6L6-KT88 PP AUDIO AMP
  54. Aikido LV
  55. RH-84 voltages
  56. RIAA Tube Preamp Build (Part 1)
  57. Hybrid amplifier with ECC88(PCC88) + LM3875
  58. Triode and Input Transformer
  59. RH-84
  60. DL22N
  61. Single Tube Amp
  62. Antique radio info
  63. Alps & Panasonic pots (what's the dael? :: pics)
  64. Vintage GE Tube Amp
  65. Troubleshooting BIG hum problem. CJ CAV-50
  66. Impedance multiplier hybrid parafeed
  67. peavey heritage 212
  68. Crosley 68CR restore
  69. Question for EU diyaudio members
  70. need advises tweaking PSE 300B
  71. CounterPoint SA-12
  72. Bleeder Resistor for Choke Input Supply
  73. Large tube anode connections caps.
  74. Gyrators
  75. newbie questions about 300B tube amp
  76. EL84 SE advice for a beginner
  77. Re: Buffer with tube PCC88
  78. Transformer impedance calcs from windings
  79. Anyone came across AirTight ATM-2 schematic?
  80. Transmitter tube hybrid - Because why not?
  81. where is the output capacitor?
  82. Clarifications on role of pre VS power
  83. My poor man version of the Raven Preamplifier.
  84. GSG problem
  85. Transformer selection/brands
  86. Newbie DC heater help
  87. HF oscillation bursts at low ( < 40Hz) frequencies
  88. Why the GZ34 Rectifiers are so expensive!
  89. OPT designing?
  90. Looking for a DIY repair guy near Toledo or Ft. Wayne
  91. beginner: which DIY kit will go well with these drivers?
  92. Xindak MT-3
  93. Loudness controls
  94. Advice on replacing Yaqin MC-10L
  95. Converting Eico HF-81 to a simple PP EL84 (pics incl.)
  96. 12at7 dc coupled to 12at7 cathodyne to drive EL34
  97. First Tube Help
  98. ampex 6793 stereo
  99. RCA Victrola 8V91
  100. what to do with these tubes? (6AQ5/6AR5)
  101. Sylvania 45C14M advice
  102. Re-designing 6DJ8 circuit for the 6CG7
  103. Hi fi kits
  104. bias capacitor
  105. Question re: Signal Ground versus HT ground
  106. Schematic to a friend
  107. Newbie question about transformers
  108. Request for suggestions. Akai M8 mono amp schematic validation.
  109. Rectifier
  110. Source for transformer parts?
  111. odd order harmonic squelching?
  112. Best Current Production 6550 / KT88
  113. Wharfedale W12 output transformers
  114. Are we committing suicide?! (Asbestos in vaccum tube base)
  115. Help me to Identify this Tube
  116. GU50 socket blues
  117. New 18W build el84/12ax7
  118. Why a follower in a parafeed triodeamp?
  119. Heads up for Australian tube amp diyers
  120. build new amp from 2 vintage tube amps?
  121. Sansui AU-111 rebuild and need some help
  122. Interstage/Input Transformer
  123. VALVEKING ROYAL8 with 6p14p-EV
  124. Ergo Ella PP Amplifier Wiring
  125. 6DX8/ECL84/6F3P Baby Huey
  126. Old tube amp info?
  127. MEIXING MING DA MC 2006 Phonostage schematics
  128. Problem with a Peavey Classic 50
  129. Just what the world needs - another EL84 amp
  130. Help me pick el34b tubes
  131. heathkit SA2
  132. Need help on RIAA
  133. GU50 plate curves
  134. What tube is this?
  135. Help with GZ34
  136. Need help in modifying Roberts 770 monoblocks
  137. PP and PPP
  138. ECL82 Single Tube Amp
  139. circuit idea
  140. Need Telefunken Hymnus 5438 Dial Glass
  141. Bias probes/Am I getting true readings
  142. How to measure output power
  143. Oddblock Wooden Case
  144. Amplifier Quandary
  145. Fuse blows instantly
  146. Looking for a fairly simple Hi gain tube pre amp project
  147. Best 2a3 PP OPT.
  148. Sharing cathode resistor and capacitor
  149. Power tubes in cascode for output section?
  150. good tube service tech in Los Angeles?
  151. Proposal for a new sticky thread
  152. The History of the EL-34 and other Pentodes and Beam Tetrodes.
  153. PCF what?
  154. stupid question about heater wire to ground
  155. OTL All American Five? (or Ten)
  156. Scored a very nice H H Scott 272!
  157. Simple DIY Stereo Tube Amp with around 20W
  158. Maton Amp
  159. New Tech
  160. LS8 pre kit as an output stage for DAC?
  161. Japanese Valves
  162. B+ delay for DHT amp
  163. QQV03-20A/CV2799
  164. 0,22 0,33 0,47.....uF
  165. Most powerful SE DIY design?
  166. 420vdc supply for a tube amp
  167. PSE 2a3 operating points?
  168. Ju-Jutsu: The Ultimate Monoblock
  169. Looking for Phono Stage ...
  170. Finished my Fisher 460t-thanks
  171. Datasheet Cpk values
  172. Eico635 tester
  173. 6p3s...
  174. Help with Amp Salvage
  175. 808 SE Build
  176. how to bias my rebuilt dynaco st 70
  177. Want help - RCA Tube Manual RIAA Phono Stage
  178. Tube Pre-amp for both CD and Phono inputs
  179. Cascode Driver Oscillation
  180. 872b or 6gj5a for a homebrew bass amp
  181. how does it sound and perform?
  182. Bootstrapped long tail
  183. Thorens TEM 3200 clone
  184. Identifying this RCA Transformer
  185. Tube burning
  186. Add Standby Directly after Rectifier, or After First Filter Stage?
  187. Help with some tube ID
  188. CCS power amp bias
  189. this is EL34 tube of what model?
  190. Looking for constructive criticism on my first design
  191. Audio note kit 1 vs Meishu
  192. Tube Amp Gain V.S. RF Gain
  193. Kool-mu material for building audio transformer
  194. Buzz/Hum in Matrix amplifier
  195. Optimation PA-250AC Lab-Grade Audio Amplifier
  196. RS1003 in SE triode-UL monoblocks
  197. Bypass capacitors in Tube amps
  198. Basic question re: gNFB around 3 stages
  199. James PP Audio Transformers, any good?
  200. Seeking advice for tube amp kit on,seems to be, chinese site
  201. Tube pricing from 1981
  202. 6e5p WCF headphone amp with no cap!
  203. "How it's made" vacuum tubes..
  204. Citation I and IV phono schematic query
  205. GS-4V High-mu russian triode for RIAA preamp
  206. good source for amp chassis in europe?
  207. Help identify and replacement of ? resistor
  208. New tube amp diy kit required power?
  209. Decoupling DC heater supply between valves..benefit?
  210. The Aikido Comedy: Straight Talk
  211. Recapping tube preamp questions
  212. A tube amp that's actually a tesla coil.
  213. Tube "Orientation"
  214. 18 watt tremolo vvr
  215. Pre amp output, would this work?
  216. Aikido Power Amp.....Possible??
  217. 12AX7 questions
  218. 6550 PUSH-PULL
  219. CCS at plate? Unknown schematic part
  220. Most odd grid choke behaviour.
  221. Spec for Altec TP-404 Transformer
  222. why do wimpy drivers for 2A3 work as well as they do?
  223. Seeking advice on Tube buffer / pre-amp
  224. 8x Push-pull KT88 class A in triode mode
  225. Tube Pre dull into Tube Amp - cause ?
  226. FINALLY I can start building my GM70
  227. Russian triodes ГИ-15Б arriving in a few days
  228. Cap or resistor
  229. KT88/PP driver confusion
  230. Simple SE GU-50
  231. Darling 1626
  232. 01a DHT Preamp
  233. Suitable tubes for Gomes output
  234. phono line stage project
  235. Whats wrong with this circuit?
  236. Any Newcomb Gurus.?
  237. Preamp Tube MU Level?
  238. SRPP Paraccordion topology ?
  239. Replacing 6922 with 6FQ7 in Conrad Johnson ET3 preamp
  240. Modification of a Chinese KT90 PP amplifier
  241. Tricky Headphone Amp design for AK4396
  242. How to know voltage bias adjustmentwith this data?
  243. Strange Stability Enhancement Trick
  244. has anyone bought tubes from http://www.tangotubes.com/
  245. “Earmax / G3 / Morgan Jones / Cavalli” Headphone Amp Reissue with 6SN7 Steroids
  246. Ever heard of British transofmer company "Ro"?
  247. A friend gave me some random tubes...
  248. Replacement for 6e2 without vu
  249. PP GU50 triode strapped project
  250. Tube VAS stage questions???

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