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  1. Tube GU50 made in Russia
  2. Expectations of new tube specs
  3. DC on preamp input
  4. We're up and going!
  5. Putting serial number on tubes
  6. Which of these tubes is best?
  7. Stepped attenuator resistor calculation software
  8. Help with PSU for tube DAC output stage
  9. single-tube (6GN8) amplifier?
  10. Dukane schematic needed
  11. Bloody pinouts!
  12. Testing 5651WA on the bench
  13. phase splitter concerns ?
  14. phono pre RIAA 2001
  15. Quick output transformer wiring question
  16. Can I.....
  17. Cathode FB P.P. Strange behaviour.
  18. Historic Valve Assembly Vids Mullard Content
  19. Unknown output impedance
  20. Any matching in 12AT7 sections? (SimpleSE)
  21. Over-voltage on heaters...
  22. Stray capacitance of CCS
  23. CCS Design for DHT Filaments
  24. coupling cap value help for tubelabSE
  25. YAQIN MC-10L to Klipsch B-3 Speakers
  26. Sonic effects of tubes
  27. Gubin Valve Stereo Amplifier Question
  28. 6J5 Shootout - which one's best?
  29. Chinese Tube Amps?
  30. 26 DHT users please comment on what you built & use.
  31. auricap Vs musicap (Another Cap Question)
  32. Help with splitter design for 7591 PP
  33. Tron Seven
  34. blue glow on one channel
  35. Suitable Power Trans for 6gw8/6bm8/el84
  36. Dynaco Pas 3 Hiss from HV regulator
  37. PS Problem: How do I Reduce Voltage?
  38. Got the build itch again. 80w kt88
  39. lm317 CCS question
  40. LM334z
  41. Parafeeding a Tetrode
  42. Differential stage biasing choice
  43. Got an overshoot problem.
  44. Help! What could possibly be wrong?
  45. Noise - 6J5 - 71a -300B amp
  46. crude, simple and powerful PP-amplifier
  47. What's the appeal of type 80 rectifiers?
  48. 6N7 PP amplifier
  49. 300 KW tube audio amplifire-modulator
  50. Weird amp on ebay
  51. which type of rubber cushion under transformers?
  52. 12at7 LTP CCS
  53. Which value of a potentiometer
  54. Strange circuit - heater hum opt feedback?
  55. Aikido question
  56. Tubelab SE diode substitute
  57. Copland CTA-402 Phono Section Comments
  58. modified sine wave power inverter
  59. Rebiasing my DSL-100
  60. My EL84 SE
  61. K-16LS kit Assembled and Working
  62. Claus Byrith 30W PP
  63. Aikido pre and class T amplifier ...for a newby
  64. Best replacement for Black Gate WKZ?
  65. DIY Jukebox!!
  66. Partial feedback confusion
  67. Anyone used the 7C7 loktal pentode?
  68. Is vacuumtubes.net still in business?
  69. Rectifier Tubes
  70. music angel kt88 tube amp schmetic needed
  71. Next project suggestions
  72. Unpotted Peerless 16309 OPT from Heath W5m
  73. 6au6 Cf
  74. Direct-Coupling Question
  75. Help on CCS PP differential driver stage for SE 845 amp
  76. I'm Looking for this Similar Schematic !
  77. ECL86 preamp critique please
  78. Low cost 6AV5 design questions (long)
  79. Got my tube spice models, and tubed CD player page back on the air
  80. Vsac 2008?
  81. How hot do Hammond chokes get?
  82. Transformer current question
  83. TubelabSE - best MOSFET choice?
  84. WTD: Reviewer/Writer For DIY Articles
  85. photomultiplier tube - what is this???
  86. Trace Elliot Tube replacment
  87. fun idea: cameras and tubes!
  88. Quicksilver
  89. EI-75 End Bells
  90. Svetlana vs. Winged C
  91. Tube Amp Links
  92. McMartin MA-20 mods
  93. Power-tube grid-leak bias
  94. Best/favorite CF NOS noval twin triode?
  95. How can I calculate voltage over cathode resistor?
  96. Grid bias with Class A SE ?
  97. QUADII with DHT
  98. My First Tube Amp
  99. RH84 vs Magnavox SE?
  100. Rectifier and amp heaters on one supply?
  101. OPT impedance vs. speaker
  102. Power Supply help
  103. Problem with Stealth clone (12A6)
  104. phono stage hiss
  105. Lafayette LT-100 and 6AQ8 tubes
  106. Input potentiometer selection
  107. VSAC 2008 Amp Class
  108. Searching for simple 12bh7/E80cc pre schematic
  109. filament AC vs DC
  110. Novice PS Question: Diode Dilemma
  111. Custom Power Transformer Supplier UK ?
  112. lowering AC heater voltage help?
  113. 60 hz hum, what causes those?
  114. Problem with my ST70 build
  115. S-5 16LS tube amp use with 8 ohm speakers
  116. Yaqin 300b
  117. I'm going in.....
  118. noisy rectifier tube
  119. Quad II Output transformer rewinding question
  120. screen-drive (g2 driven) plate curves spacing linear!
  121. Strange feedback method
  122. Trio W-45a Amp-
  123. Hammond Power Transformer Buzz...
  124. Tube DI Help, Please: Substitutions
  125. Harmon Kardon Galaxy BA-150
  126. Velleman K8010 monoblock tube amplifiers
  127. First Project Finished-Tubelab Simple SE
  128. My 6S19P Linestage
  129. EL34 recommendations
  130. Edcor CXPP100-MS-5K- anyone used this (or similar 100W) output transformer?
  131. Bypass 2x0B3 tube cap value ?
  132. EF80 vs EF86
  133. Decware MODEL SE84C-DIY
  134. ST35 voltages WAY too high!
  135. How Do "Heat Fins" Work In a Vacuum?
  136. Acrosound Ultra-Linear OT catalog
  137. Simple Questions: Diodes and Heaters
  138. Recommend an input stage triode please
  139. Copper patinization?
  140. V-m 560a
  141. Anybody dealt with high-endstore.com?
  142. Diodes On Rectifier Question
  143. Stray hum pickup *preamp* cathode R-bias vs. battery bias & 12AU7vs.5687
  144. looking for a website...
  145. Simple 45/2A3 schematic error?
  146. Plate load for push-pull
  147. Hybrid regulator
  148. Hybrid Graetz Bridge
  149. JCM 900 100 Watt Power Trans Specs..
  150. My first amplifier - 6n3c-E
  151. Power supply problem
  152. Grid choke as I/V?
  153. Hammond PR20
  154. 6JN6 screen-drive (g2 driven) plate curves?
  155. Another compactron PP output
  156. 6922 transformer coupled
  157. Beam Deflection Tube Limiter
  158. 6LW6 bias points
  159. Dynaco SCA-35 or Sherwood S5000 iV
  160. SE 6550 class project (continued)
  161. EL821 / 6CH6 triode curves?
  162. Ground wire adds hum to Harmony H-400A AC/DC amp
  163. "magic" phase splitter for SimpleP-P
  164. Harmon Kardon tube amp kit testing
  165. Did I hurt this capacitor?
  166. (newb) Why no white (-) leads on power trafo
  167. Ruined transformer?
  168. My Tabor Clone is finished.
  169. first build 6em7 and it works
  170. Cleaning up baked enamel/painted finishes
  171. Highs roll off
  172. scratch build EAR834p
  173. Silvertone Organ Amp
  174. El156se
  175. One more hybrid idea
  176. Can Anyone figure this?
  177. "Mighty Mite" Single Ended Amplifier
  178. old question - lost answer 6AS7 SE amp
  179. My KT88 SE project
  180. Motorola OPT
  181. Weird Input transformer hum.
  182. cascode vs asymmetrical cathode coupled
  183. music angel 845 SET
  184. Help! My amp stopped singing...
  185. LTP CCS IXYS with 10m45s opinions
  186. Boozhound Choke Tail Pair for HiFi
  187. 5718 subminiture tube?
  188. fixed bias for push pull tube amps
  189. EC86 and phono
  190. Power Transformer mystery lead....
  191. Bias measurements 6L6
  192. 0A3 Light
  193. Equivalent to Tango NC-10 IT
  194. Ammeter wiring?
  195. Highest Practical Primary Z in OPT?
  196. Ampex 6v6 PP Modifications
  197. Variability of RIAA eq with tube characteristics?
  198. 807/350B/6L6 PP amps PSU ?
  199. Need Help For Tube Amp
  200. ECC83 300B Loftin White amp
  201. Hashimoto and the wonderful 45
  202. Capacitor identification–old PIO?
  203. Heathkit variac
  204. E80L pentode mode as driver?
  205. Transformer repair
  206. How many ga for chassis wire?
  207. I want to MOD - help?
  208. What About Beam Deflection Tubes?
  209. Capacitor
  210. Placement of Ultralinear Tap On Homemade Transformer
  211. Differential stage with CCS in cathode
  212. Directly heated Cathode/insulation question
  213. "Dirt Cheap SE" 6BM8 spud amp
  214. Single-end Power amp with tubes
  215. Input pot question
  216. Need help putting 6Z4 into PSU Designer
  217. SimpleSE Under Chassis Mounting
  218. Bias methods?
  219. Aikido and SE KT88
  220. Built this pre amp today!
  221. Mystery tube in a Fisher FM-90X - V50,064
  222. Switch contacts for HV supply
  223. The First Sound Recording - we can hear it finally
  224. RCA made in Japan???????
  225. 6V6GT in the SimpleSE
  226. trimmings for amp project
  227. Tube Preamp Hybrid new builder, lots of question!
  228. Chinese mini bias pots
  229. GU-50, GM70 and KT88
  230. Please recommend me an amplifier design.
  231. Single-ended OR push-pull?
  232. Darling in Europe... (110 vs. 220)
  233. DC heater (+/-) -> elevated?
  234. Tubelab simple SE help needed...working but only on one channel
  235. Yaqin MS-300B SET amp
  236. 300b calibration (tubelab)
  237. Sonics of a "dynamic coupled" driver
  238. 716p's Vs. Fancy Caps
  239. ELL80
  240. Will this work?
  241. What circuit to build with MQ TL-404
  242. Very low output from Knight KN928 amp
  243. 6GK5 to drive a 6AS7?
  244. Plate Heater Dissipators
  245. preamp suitable for Dynaco st-70- OTHER than dynaco
  246. 'EL34 World' website for music amps
  247. Strange Russian(?) tube tester
  248. is this possible?
  249. Power transformer impedance
  250. Anybody did compared tube vs opamp for preamp ?

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