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  1. Switch-mode PSU for tube heaters?
  2. Hammond Primary Lead color is wrong?
  3. A newbie need helps on the very 1st tube PreAmp
  4. why does 12u7 need certain amount of gain to stop hum 120???
  5. EL34 Pushpull imbalance
  6. Tube Preamp Popping on Source Input Change (?) / 6DJ8 Preamp On Chip Amps
  7. Rozenblit Grounded Grid Cascode Pho Preamp Project
  8. Driving the kt88/6550 in set mode
  9. 6550a question for engineer?
  10. Yl1260
  11. Parts layout diagram for SE amp
  12. Da 42 Triode
  13. Bogen CHB100 Power Supply Question
  14. Testing of russian tubes on B&K 747B
  15. VR150 use
  16. First Valve DIY Project
  17. I'm having grid1 current in EL34
  18. anyone ever built a tube mixer similar to the RCA Living Stereo type??
  19. SEPTOR AT-amp (Anti-Triode) being built
  20. Sophia Electric el34 mods/upgrades
  21. Looking to build....
  22. Bias resistor for source follower driver
  23. PL 519 electrical characteristics
  24. Settings for testing 2C51/5670/396A on B&K Model 600 Dyna Quik
  25. My 6AS7G Fuse Link Checker
  26. Anyone ever had issues with One Electron?
  27. 35% off sale at RadioDaze
  28. phase splitter with Tr ?
  29. Zenith stereo, EL84 SE. What to do...
  30. Free TVA-1 rev.3 schematic
  31. Bat Vk-60
  32. Trouble with amp 6V6
  33. 5-125 UL curves anyone?
  34. Mod it or scrap it?
  35. Bogen M330
  36. 1st Tube Amp - What to build?
  37. 6J5 weird phase inverter
  38. swinging CCS PP output stage
  39. Varying 2 tube amp characteristics: SE treble and richness
  40. Jadis Defy 7 Schematic
  41. microphonic sub-miniature tubes?
  42. Transformer distortion (THD)
  43. Options for replacing EF86? E180F?
  44. changing an integrated tube amp to a power amp
  45. Nice tube test supply
  46. Looking for 300B 2.5V heater vendor
  47. Cap to bypass bias battery
  48. 2A3 SE parafeed with PP-transformer
  49. Preamp Voltages
  50. TVA-1 "Export" circuit/schematic?
  51. 12ax7 series is this correct??
  52. Yet Another Phono Stage Suggestions Thread
  53. Sizing Coupling Capacitors
  54. budget xformer for 829B pentode mode PP (class AB) ?
  55. preamp layout suggestions please
  56. Transofrmer secondaries
  57. please help 407a
  58. OPT Grounding / Crosstalk
  59. SE With shared Rk in output
  60. Unsolved problem EL34/12AT7/5AR4
  61. Radford STA25 service UK
  62. My tube DIY Web page, translate into English
  63. suggestion about AIKIDO PRE
  64. Hashimoto A-105 - 6S4A
  65. Looking For Counterpoint SA2000 Schematic
  66. Where do you put the standby switch
  67. Operating point for 6GK5
  68. Audio Research St-70-c3
  69. Help identifying tube amp
  70. Ed8000
  71. power suply for Pre & Phono Use tube 6BM8
  72. ESLDD with "anti-triode"
  73. Schematics border patrol psu
  74. Bias supply idea
  75. dynaco st 70 c3
  76. KT88 and the 6550
  77. GM70/GM70 parafeed SET?
  78. Genalex repro KT88s
  79. Grid - Screen Alignment (X-Rays)
  80. tube matching
  81. DC heaters for 5687 in Aikido?
  82. Connection Jensen 4-pole
  83. Measuring Output Power
  84. Modelling stereo PSU in PSUD ...
  85. Speaker matching transformer.
  86. Sowter's Radford transformer
  87. Cathode bias 6LU8 UL/Triode
  88. Cathode bias 6LU8 UL/Triode
  89. Looking for a linear triode for lowish B+ CF (6N6P?)
  90. need spice model 5814a
  91. 420T or 10E/33B ?????????
  92. Decca DMI-73 and EL-84 weirdness
  93. Pentode guys: important to decouple g2 supply between stages?
  94. Ccs
  95. The Friday Chuckle
  96. Need help deciding what to build
  97. Why does red plate spell early death?
  98. Odd transformer with 6X4 tube mounted on top.. smoking more than my uncle Frank
  99. fisher 400 tweaking issues
  100. GM70 an 813 strapped in SE-UL - circuits?
  101. need help on transformer secondaries connection
  102. Partridge audio output transformer value
  103. Low mu Preamp Triodes as Power Output Tubes
  104. 300B Transformer temperature
  105. Standby Switch Problems
  106. Worth repairing?
  107. Measuring current distortion
  108. GM70 sockets?
  109. high AC mains problem
  110. 250 V PSU help
  111. EL34 UL Curves
  112. datasheet for ge 5star and rca command 5814a?
  113. PS choke voltage/current quetsion
  114. push pull power amp design question (a lot of actually :) )
  115. Knight Amplifier Repair Question
  116. Grant G100AS circuit diagram?
  117. Hashimoto A-105 - summary so far
  118. Related Audio Worlds largest
  119. Why do valves go microphonic?
  120. Allen Wright Superreg manual
  121. Need help on resistor values for 5687 aikido kit
  122. Pioneer SM83 PP amps
  123. Techtube valves/tubes
  124. Datasheet for Russian 6p3s-e
  125. Continually Blowing Fuses
  126. I am done with AES -- a short rant.
  127. What amp(s) would you buy under $1500
  128. Etf 2008
  129. All FET Aikido
  130. what 12au7 have different tone ??vintage and modern
  131. Can 3.5W 2A3 amp drive proAc 1SC?
  132. British seven pin sockets
  133. Pentodes, triode mode and grid screen dissipation 101
  134. Yakov Aronov amps
  135. Suitable tube pre-amp for Phase Linear 400?
  136. Goldpoint value?
  137. TubelabSE 300B power transformer ?
  138. Hashimoto A105 - some results (ECC99)
  139. Some uses for old transformers
  140. Power Supply Question
  141. PY82 as rectifier
  142. pro-ject tube box
  143. Some dumb Questions on Heater CCS supply
  144. Aikido loses power?
  145. Quicksilver 8417/12FQ7 mods
  146. Calculations for an AIKIDO
  147. Music Angel Empty shells
  148. Need help troubleshooting preamp trouble
  149. Compactrons on the brain!
  150. XSE vs. GSXE Edcors
  151. output transformer
  152. How to simulate OPT in LTspice?
  153. 311-b
  154. PSU Design help !!!
  155. BDT Preamp build
  156. Russian tubes / capacitors purchasing
  157. Bored with Leak ST20 - ideas?
  158. KT-88 Music Angel problems with sound level
  159. Fusion Hybrid 300B
  160. I'm new here..... :(
  161. DIY/Buy/Kit
  162. Ralph from Atma-sphere will be giving a talk 09/16
  163. Modified USB DAC board, DDDAC with triode buffer
  164. LS50/GU50 Both Grid Drive
  165. Aikido filament question
  166. 6l6 Se.
  167. Feedback requested on 7591 PP design
  168. Blackburn Mullard/Philips video
  169. DIY sheilded B+ cable
  170. Experimenters Tube Sockets
  171. Used freebies precipitate questions
  172. Mains toroid as IT with DC balance?
  173. Tubes for Viva Solista 845 SET amp
  174. SE transformer for PP duty?
  175. Warning: new SS relay question / No flame I
  176. Tube Haunts Thread?
  177. Problem with Maida regulator
  178. 2 stage SE IT coupled amps..
  179. BUF420M Current Sink
  180. Direct from the mains?
  181. Annealed silicon core opt`s
  182. Designing a "cheap" highish-power PP amp...
  183. Improvements for the Mikael Abdellah KT88???
  184. DC supply on driver tube hums..
  185. Sun Audio SV-2A3
  186. Mullard Blackburn Tube Factory Tour Video
  187. SE amp: Please suggest a better operating point
  188. Paralleling Outputs or Bi-amp
  189. triple triode common cathode - only want to use 2 triodes
  190. Eye tube for balancing multi amp system
  191. 12ax7 preamp.
  192. External PSU for Quad 22 pre-amplifier
  193. Keep Blowing Fuses
  194. learning tube rectified psu
  195. Series of Diode on HT Plate
  196. Quad II power amps......power output transformers!!!
  197. Mullard (factory) making tubes again
  198. CFB and A2 operation
  199. DIY triode
  200. Interesting symmetrical amp from 1955 magazine
  201. 6N23P, 6S19P anybody knows?
  202. Worlds smallest HiFi valve amp
  203. A DIY Interruptus Moment
  204. Noisy EL84 amp needs new front end
  205. Loosening up magnetic "stiction"
  206. The Return Of Blackburn Mullards?
  207. Can I use different value cap?
  208. need output transformer for Fisher
  209. help for E182CC linestage/driver
  210. User Beware: A Report On Jj Tubes
  211. Depletion mode mosfets for 2mA CCS ?
  212. New tube stash question
  213. Stepped attenuator recommendation...
  214. Pros and cons of Cascoded front ends
  215. EF86 as a volume pot, line pre 2008
  216. RCA voltage regulator
  217. Input voltage attenuation
  218. Valve Buffer amp
  219. 6y6ga
  220. Filmosound L-1 6V6 Volume pot issue
  221. 3C24 in a SE output stage - output transformer impedance recommendation !!!
  222. Another 3f4 spice triode model: 5718 submini triode
  223. Differential Amplfiers - current sources under/over the triodes
  224. Impedance rate VS impedance stability
  225. Anyone running Mikael's SE KT88 in Pentode?
  226. what double triode is less microphonic ?
  227. Need advice on proper use of anode chokes.
  228. Grounding problem?
  229. Current regulation for filament of say a 300B
  230. diagram for OTP 6.6K valve KT88
  231. Dynaco Pas Transformer
  232. Regulated screen supply
  233. Shocked!!!
  234. set el84 tube amp
  235. tube preamp RIAA
  236. 4E27 as a substitution of 845
  237. LS 37 lite audio phono
  238. I want to build an amp!!!
  239. Choosing proper g2 grid stoppers for SE UL..?
  240. audio note P1SE improvements
  241. 5687 perveance
  242. Where Can I Pick Up Neutral
  243. Hyperlinear line preamp
  244. What tube to use.
  245. Using mains transformer as output transformer
  246. Has Anyone Tried This Before??
  247. More Tube Learning (for me) Cathode followers
  248. weird hum problem
  249. Weird oscillation
  250. Tube stash strategy and testing (long)

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