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  1. EL84 driving EL84 SET with fixed bias
  2. P2P 6CG7 Input Buffer
  3. 865 in triode mode...anyone ever tried it?
  4. PP KT88 Amp Low frequency Ringing
  5. World audio designs kel34
  6. Glassware Audio Design
  7. 2A3 mounted horizontally
  8. from tube amp to fm reciever
  9. diy tube amp
  10. Cary 805ae xlr option
  11. ST-70 mono makeover
  12. breaking in audio capacitors
  13. Question about 6V6GT amp schematic
  14. Sherwood Schematic
  15. Ever hear of a D7L1 or D7L3 YR7 tube?
  16. Psvane Replica RCA 2A3 tube - WR2A3
  17. 845 Driver Circuit
  18. ADJUSTABLE BIAS MOD KIT
  19. Gold Lion B749 12au7 Thoughts?
  20. Siliconray SRK 09 tube amp kit help
  21. Quantum minstrel
  22. Does anyone know how John Lee Hooker recorded this? (1949)
  23. Please Identify these black capacitors.
  24. New Tubes too silent (6P15P)
  25. best sounding & value amp kits/designs?
  26. Custom Woodwork For Tube Amp
  27. Tube 2E22 in triode mode
  28. Has anyone built an OTL amp with switch mode power supplies.
  29. Altec 15067 transformers
  30. Some interesting findings with transformers
  31. Bogen KO-60 Output Iron
  32. What would you do with Scott 222D IRON?
  33. Aikido vs CCDA
  34. wiring color code
  35. Maverick Audio TubeMagic D1 DAC
  36. Is one gz34 enough
  37. Edcor OPT opinions
  38. mengyue mini/ming da el34b
  39. I need a tube buffer circuit using a 12au7
  40. Stereo Amplifier Wood Enclosure
  41. What is the theoretical advantage of direct heated triodes?
  42. 6AS6 is useful for audio ?
  43. GM-70 design approach
  44. Ultimate emotion core material ( types of silicon steel , Permalloy or Amorphous etc)
  45. Looking to build my first tube amplifier
  46. Tube/SS opamp
  47. Biasing 6CA7/EL34 in Luxman LX33
  48. John Broskie MIA again?
  49. combine filament winding for rectifier
  50. HYBRID TUBE CFP
  51. 9302 Maggie Rebuild
  52. Pyramid-IX monoblock, 200W from 4x GU-50
  53. Suggestions of phono stage to build
  54. Do power transformers affect sound quality?
  55. Help with a Velleman K4040 ...
  56. RCA PA Amplifer, Input Transformers
  57. Channel imbalance Xiang Sheng DAC-01
  58. ARC M100s
  59. pros & cons of current mirror to balance a push-pull ?
  60. Wright Audio WLA10 help needed
  61. The Best tube/valve sound!?
  62. Mcintosh MC1000 and Ming Da MC300-PRE
  63. Operating Modern 845s
  64. The Transcendent Sound Son of Beast OTL Master/Mod Thread.
  65. Neutralizing An Amplifier
  66. Stacked speakers driven by an SEP amp?
  67. Tube buffer suggestion for LM4702 amplifier?
  68. FWB Voltage Doubler with -Bias supply
  69. 500V SE pentode design
  70. single ended transformer driving 32ohm speaker
  71. 250K Attenuator
  72. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  73. Daughters POD amp 13EM7 Pics
  74. Calculating Ripple Current with PSUD2
  75. Channel problem on 45 converted amp
  76. Want to make a tube preamp
  77. Marantz TC-5 choke value
  78. diference between schematics and pcb layout
  79. Would this work?
  80. Can old resistors go bad?
  81. Strange output tube behaviour
  82. Practical question: toroidal transformer / heater current / kt120
  83. Morgan Jones Power supply cap values
  84. Can use a ballast for a PSU??
  85. Looking for a OTL tube headphone amp design
  86. Relative Humidity Attenuating HF
  87. Parallel Output transformer question
  88. Need help to ID a tube...
  89. Modifications to Sennheiser VKS 203
  90. Onix SP3 integrated amp latest schematic
  91. Omit sp3 integrated amp latest schematic
  92. Help: Western Electric 102A Tube Datasheet and Test Settings
  93. Power and output transformer separated from amplifier
  94. discrete and simple VCCS
  95. heater wiring question
  96. What is the deal with Welborne Labs?
  97. Center Channel
  98. input stage problem help please!
  99. Tube Tips/Tricks for beginners
  100. Any skilled custom tube amplifier builders out there?
  101. Are these tubes really matched?
  102. Single Ended Amp
  103. Mighty Midget Problems
  104. Run the tube stuff in your car
  105. Jackson 648 test for 6973
  106. Space-charge tetrodes in Inverted Mode
  107. choosing input valve
  108. Rectifier characteristics
  109. Glass-ware?
  110. 5751 Mil spec tubes vrs 12AX7
  111. 47 pentode...fabulous sound !!!!
  112. Aikido preamp transformer question
  113. 40's tube receiver question
  114. W5m transformer
  115. Dual voltage PS filtering.
  116. OD3 150V tube regulator
  117. Fisher 500c
  118. Help with quad cap upgrade
  119. low voltage hybrid power amplifier
  120. Morgan Jones Kapacitors
  121. Which IR LED?
  122. Tube Frequency Response
  123. Big B+ voltage drop using diode rectifier.
  124. Triode ST70 kit schematic?
  125. 6AU6 replacement
  126. IT in cathode for driver class A2 tube
  127. Bogen MX30 Output Transformers
  128. Worlds Most Expensive Tube Amp !!!
  129. Blown screen resistor
  130. To ground plane or not?
  131. 5Z4PA Alternative?
  132. Question about chassis ground
  133. 6337- wtf is it?
  134. need ideers for a 6 channel amp
  135. sv572 transformer headache
  136. 6C33C / 6EM7
  137. 6146 TUBES ?
  138. Impedance matching
  139. QRP03 - Tube Buffered Gainclone
  140. Amp Cage Fababricators?
  141. PP KT88, Need help!
  142. Question regarding rectifier tube replacement
  143. Harmon Kardon A500
  144. Double triode 6SN7
  145. Tank's DIY tube preamp
  146. C core OPT for PP EL84
  147. amp diagram for KT88 and 300B on the same circuit
  148. Yaqin MS 34 D
  149. Tube buffer for amplifier with LM1875
  150. What is the best ?
  151. DUKANE tube PA help
  152. Old tube? HELP RSE NP-7V-12 168810
  153. My first tube power amp
  154. Another mystery tube:
  155. Quad 22 Wiring
  156. Radford phase splitter again
  157. hookup wire source
  158. MCU adjustable fixed bias
  159. vr tube / glow tube as filter?
  160. Using phono stage only of preamp
  161. Correct settings for EBL21 and other tube on Hickok 539C
  162. Decca Portable Record Player model DPS8 Filter cap replacment
  163. 6V6 vs EL84 for output
  164. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  165. 2A3 with 12AT7
  166. Voltage rating of plate gyrator MOSFET
  167. Quad22 like preamplifier kit
  168. Push-pull implemented with KT88
  169. My QUAD 2 Restoration
  170. DIY High Power Car Tube Amp
  171. Perished insulation on transformer secondary - seems shorted. What can I do here?
  172. Need advice and help with new build
  173. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  174. Determining imput impedence of a preamp line stage
  175. Newb question on 12AU7 gain stage
  176. Valve Preamplifier Help
  177. OPT choices - 6L6 PPP
  178. MESA STRATEGY 400
  179. Shuguang, Beijing or Shanghai EL84 ?
  180. CJ PV-5 tubes
  181. Reference tube amp kit, <20 watts for under $1,000?
  182. ccs power supply 310a
  183. At what point does it become a "hybrid" ?
  184. Line filters
  185. Step-up MC transformer for Audio Research SP 6C
  186. Psud help.
  187. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  188. Repurposing heathkit s-2 electronic switch
  189. output cap bypass?
  190. 6e5p & 6c41 tube amplifier
  191. Looking for my first tube amp...
  192. Acceptable variance in plate voltage?
  193. SRPP bias calculation
  194. 6A3 test, what am I doing wrong?
  195. Goldline Phono Tube Pre Amp PCB - Analog Metric
  196. New Copper Nanoparticle Solder - Breakthrough?
  197. SRPP as a final stage? What do you think?
  198. Troughline Transmissionline theory explanation needed
  199. Help with odd bias method on Crown tube amp
  200. preamp output impedance matching
  201. KT66 Woes
  202. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  203. Cascode driver
  204. 2a3 DC coupled
  205. ECF/PCF 200, 201 B10B 10Pin Tubes
  206. Homemade EL84 Push-Pull amp doesn't work
  207. Tamradio Transformer
  208. Variable HF oscilator
  209. eico st70 dimming house lights and slowing turntable`
  210. Amplifier Calculators
  211. Are any of these tubes useful for audio
  212. Modifying a J Sound Lab 2A3 amplifier
  213. Experimentation - Power transformer as output
  214. Mullard with ECC99 Phase Splitter
  215. Killed an Edcor OPT. How?
  216. If it ain't broke....
  217. Silly DHT question VaMax
  218. Recommendations for preamps with PCC88
  219. 6h23n same as 6n23p
  220. Mighty Midget Amplifier and speaker requirements.
  221. Bias Supply protection
  222. Tube Amp Schematics
  223. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  224. 6sn7 driving Push Pull Parallel kt88's?
  225. help with an old Peak ST-100 - single ended 6GW8
  226. Designing an 801 SET Class A2 Amp
  227. Grid choke considerations for 300b
  228. SE poweramp with best bass performance
  229. 45 Tube IN SET Amp
  230. what will happen?
  231. ECL86 PP Amp - Very low frequency clicking
  232. motor run cap question
  233. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  234. EL34 SET With No Driver Tube?
  235. Filter capacitors - motor run?
  236. Microwave transformers
  237. Capacitors in the cathode of preamp tubes
  238. How Many Tubes to a Rackspace?
  239. selenium diodes
  240. Is it possible to Oversize an SE OPT?
  241. questions about my ecc83 phono pre build
  242. PSU resistor temperature
  243. QE08-200
  244. Adding heater transformer to my 6b4g amp. help a noob please.
  245. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  246. Big Cap in luxman MB3045
  247. Question about 4x12 cabinet wiring
  248. What happened to Sakuma-san's website ?
  249. Should I ???
  250. Can you classify condition of tubes?

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