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

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