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  1. 6sn7 alternative
  2. A tube amp that will drive 2 ohms or less...
  3. Looking for a simple circuit
  4. Why does my tube amp make a scratchy, popping sound?
  5. Fisher kx-100 Recitfire problem
  6. Potentiometers - USA
  7. Tube SE amplifier with 6P3S (russian tube)
  8. Plate dissipation
  9. Need help with tube models in LTSpice
  10. D3a pentode as driver? History of this tube?
  11. Tubelab SSE inrush current limiters.
  12. looking for some ideas. rebuilding heathkit w-3m amps.
  13. What's wrong with the 12AV7? Try this out!
  14. simple se and edcor gxse output transf question
  15. old tubes
  16. weird ef86 input stage in a Philips amp
  17. table radio w/ tube amp...in the designing process...anyone do this?
  18. Question: grid current related
  19. RH84 based amp
  20. My Aikido!!
  21. Tubelab Simple SE - Transformer Assistance
  22. ST70 clones
  23. Need help selecting a VR tube
  24. Help analysing Hammond organ circuit
  25. Stromberg-Carlson ASR-433
  26. WAHAHA! Our DIY tube amp is doneŁĄŁĄ
  27. Pentodes.
  28. making octal adapters
  29. How to cut ceramic
  30. Tubelab web site down for a day
  31. Trans wires in parallel or series?
  32. Tube socket for ECC88, drawing
  33. Richardson 5ar4
  34. Percy Audio / Still open? / Can't seem to get any response from them
  35. Resistor types in an amplifier
  36. simple se inrush limiter placement
  37. CRC Filter ?
  38. EICO 666 tube tester - What settings do you use?
  39. PCB edge connectors... what will they do to my sound?
  40. Tranny question
  41. Anyone here in contact with Pieter from Tribute?
  42. Fisher 500C with JJ 7591S - Optimum Bias Current?
  43. Power supply resistors power ratings
  44. Anyone tried this SE trafos?
  45. Adjustable B+ and Cathode Current linestage
  46. Possibility of Tube substitution trough MOSFETs
  47. G2 overvoltage ??
  48. Toroid transformer cover?
  49. Help me to think of name for a tube amplifier
  50. All DHT Phono Stage
  51. How Set up Aria Mini 6P14?
  52. new build - abdellah SE KT88
  53. Sources for enclosures, parts, standoffs, tubing, etc?
  54. Duncan PSUII question
  55. Bench Phono Pre Layout
  56. Imd
  57. Line Level tube
  58. Wanting to start a DIY tube amp
  59. ARC VT100 driver adjustment
  60. Valve Amplifier
  61. SE OPT's in India
  62. Arcing KT-88 and GLY513 ASC 600uF - Too Much of a Good Thing?
  63. What is a "gridless control" tube ?
  64. simple se ground to speaker wire?
  65. Polytone Mini-brute II
  66. New 6N6P linestage
  67. Split supply, arrangement of gain and phase splitter tubes
  68. New Hybrid Amp with multiple inputs: Little Singer H-30A
  69. Help with my Transformer - vibrating
  70. Ultralinear fender?
  71. Quick transformer question
  72. Need for twin 5U4GB rectifiers in baldwin organ amplifier?
  73. Oddwatt / Oddblock Builder's Thread
  74. Tube output stage for Buffalo Saber 32-bit DAC?
  75. Silvertone Multiplex Stereo Model No. 4092 Questions
  76. 6SJ7(6J8) + 6v6 (6P6S) SE
  77. Wavebourn Tower-III High-end hybrid amp
  78. Question - Closest Russian Analog of 12BH7A
  79. Help understanding the PowerDrive circuit anaylsis
  80. Aikido pre
  81. Fixed bias: Pots near supply or tubes?
  82. Oh, those 12AU7s again...
  83. Plitron LOW Power OPT...
  84. Has anyone used The Guiguang 300B?
  85. anyone have any el86 circuits laying around?
  86. ok, power supply question, 230v - 117v conversion
  87. Big lot of tubes purchased this morning
  88. Tamura HM-1
  89. Tube Amp Design Question...
  90. Cathode Bias questions
  91. Tube Hybrid Shunt Regulator ... will this even work?
  92. Forgive me TubeLab ... I have sinned
  93. Broskie regulator oscillates
  94. Yushang-Audio Classic 16.6
  95. Tube PreAmplifier Kit suggestions..
  96. Sourcing Chassis Access Panels
  97. Running 4 ohm speakers with my Simple SE
  98. Cavalli OCL Buffer
  99. wooohooo! Three Rowe AMI amps for $200NZD!
  100. Quick Volume pot question
  101. Basic choke quality/sonic benefit questions
  102. Tubelab SE buzzing noise from the speaker
  103. lighspeed attenuator w/Simple SE AMP
  104. Tube rectifiers for Dummies
  105. help on a SE 4 channel tube amp for auto?
  106. Audio Output Transformers
  107. K-502 Help
  108. High gain guitar preamp kits!
  109. First post, first project RH84
  110. Source for tube cages?
  111. Simple SE optimum layout for hum
  112. Audio Transformers - Help
  113. Gran Tenor
  114. Toroidal Output Tranformers
  115. Cathode Follower confusion
  116. Tube newbie problem
  117. Replacement of KT88's. No mods' necessary?
  118. Phase splitter types
  119. Yaqin VK-2100 mods
  120. Heptode oscillators
  121. tube amp repair in DFW area
  122. A novice scope user - measuring noise?
  123. Hickok 600A & KT88
  124. Multifilar winding
  125. Measuring Hi-Fi Amplifiers
  126. Help with 30A5 tube amp schematic
  127. simple se troubleshooting
  128. 6SN7 operating points input gain stage and concertina
  129. looking for pentodes for scope deflection
  130. Cary 845 schematics
  131. newbie simple SE issue
  132. Power Transformer 110/230V Windings Question
  133. OPT Voltage spike protection with zeners
  134. IRIS OTL info
  135. Precise 111 tube tester - missing tubes
  136. ping yves
  137. Filters
  138. 2X2 as amplifier rectifier
  139. SPMSU for heater supplies
  140. Shipping Tube Gear
  141. Amplifier squeel at zero volume
  142. mercury rectifier for electrostatic bias
  143. My little coupling-cap-test in a UL-70W-Amp
  144. Electra-Print 300BDRD
  145. K-502... upgrading the OPT's with Hammonds
  146. Tube eq or tone control - how to design it?
  147. Help, strange glowing in KT88
  148. Need opinions about this tube circuit
  149. Custom designed transformer for Andrea Ciuffoli 6c33c OTL AMP....
  150. Max current for Edcore GXSE10-8-2.5K
  151. And for the man who has everything....
  152. 1J6G recommended operating point?
  153. DHT bias and filament supply in one?
  154. Tubelab Simple SE Sound Quality
  155. 3d amp modelling (for solidworks)
  156. RSC Stereo Ten.
  157. Weird Bias on Simple SE
  158. Help - noisy phono stage
  159. 2A3 Max Grid Current Rating?
  160. Futterman style 6AS7 OTL with other tubes
  161. Low/Mid-Watt Amps
  162. Calling all builders of the Swenson/Pimm HV Reg
  163. AZ1 problem: broken metal part
  164. More Grunt from Aikido Needed to drive PL509's
  165. Correct OPT and other adjustments on old Bogen amp
  166. Ebl 21 Se Amplifier
  167. OT primary impedance calculation
  168. Akai M5?
  169. Identify the DHT
  170. Fountek Altitude 3500, any opinions?
  171. 31 tube in output
  172. dynaco system- volume remains
  173. Left channel BAD in stereo! HELP please! It's my first tube set
  174. OPT with power transfrormer core
  175. 300b dpa
  176. IV single stage inverting Feedback Amp
  177. TechTubes - The return of Blackburn
  178. simple se how to wire a auxiliary cap
  179. Tradeoffs in analog circuit design, and so on...
  180. Has anyone Received The new Techtubes yet?
  181. 6P3S-E in place of 6V6
  182. EL34, KT88, High Voltage?, VTL..
  183. 100W 6L6 amp sounds harsh at high Volume
  184. Hickok 533 / 600 settings for 6GM8 / ECC86
  185. Need help: amp blowing fuses
  186. Best voltage reference device for a cascode BJT CCS?
  187. Tube power amp noise problem
  188. tube oscillator help.
  189. Finally have some big chokes, how would you use them?
  190. Tube amplifier
  191. Mesa Boogie bass amp quiet
  192. 12AX7 heater filament resistance
  193. Choke input LC chain questions..Q?, minload?
  194. LED bias for 12ax7 oscillator
  195. Yaqin VK-2100 hybrid running 4 ohm speakers
  196. VR shunt regulator or RC filter
  197. Screen Mode Mesh Plate?
  198. EL34 simple push pull class B : why 100W ?
  199. Scored Some Bendix 5992
  200. Tube Substitutions Online ???
  201. Resistor pack for tube amp
  202. Tube Phono Preamp PCB Ebay? are these any good
  203. Testing an EL84 as a 6V6
  204. Low Voltage (~16-20V) Tube
  205. Basic Oscilloscope question
  206. Cathodyne Questions
  207. 6922 for a Noob
  208. Cathodyne Phase splitter simulation problem?
  209. How would you improve this EL84 SE circuit?
  210. Power transformer HT/B+ voltages
  211. Help with cathode follower circuit
  212. RH84 bias change whith different el84 is use
  213. No more power transformers?
  214. K-502 Filament supply (or K-12M)
  215. **LOL** Chinese surround sound amp identification
  216. Tubelab SE driver gain
  217. MOSFET for power drive for low powered 845
  218. Aikido line & phono Guru's advice for a newbie pls
  219. Need Tube kits of above 75W Single Ended Class A amp
  220. First Project: 300B SET Monoblocks
  221. Where do you get those cool layout diagrams?
  222. Simple SE grounding -- metal spacers/standoffs?
  223. My Simple SE via Akihabara
  224. Power-On Time Delay Circuit
  225. GM-70 Build Issues
  226. Blue glass inside tubes
  227. Ruby Tuesdays
  228. Wich valve to start?
  229. Tubes that have round/curved plates. . .
  230. Calculating current capacity?
  231. AKAI 1710W R2R, OPT Question?
  232. Ringed Tube Grills / Guards ?
  233. Recommend me a warm, smooth sounding 6922, 6DJ8, ECC88 or equivalent
  234. Please help identify this tube - Shuguang 6922?
  235. Dedicated 6.3v filament transformer 240v primary
  236. can someone check this thread please
  237. Amp refurbishing question.....
  238. Tube mounting position
  239. 6N6P - recommended operating point
  240. Interstage transformer questions
  241. Help identifying resistor value
  242. New Audio Note M10
  243. K501 vs K12M
  244. what are these (i hope cheap) resistors ?
  245. Potentiometer value for 6SL7 input
  246. PSU Designer II question
  247. Lost Thread-High VOltage Regulated Power Supply
  248. 6B4G schematic - opinions please!!
  249. Plate current Question
  250. rh84 bias question.

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