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  1. P2P 6CG7 Input Buffer
  2. 865 in triode mode...anyone ever tried it?
  3. PP KT88 Amp Low frequency Ringing
  4. World audio designs kel34
  5. Glassware Audio Design
  6. 2A3 mounted horizontally
  7. from tube amp to fm reciever
  8. diy tube amp
  9. Cary 805ae xlr option
  10. ST-70 mono makeover
  11. breaking in audio capacitors
  12. Question about 6V6GT amp schematic
  13. Sherwood Schematic
  14. Ever hear of a D7L1 or D7L3 YR7 tube?
  15. Psvane Replica RCA 2A3 tube - WR2A3
  16. 845 Driver Circuit
  17. ADJUSTABLE BIAS MOD KIT
  18. Gold Lion B749 12au7 Thoughts?
  19. Siliconray SRK 09 tube amp kit help
  20. Quantum minstrel
  21. Does anyone know how John Lee Hooker recorded this? (1949)
  22. Please Identify these black capacitors.
  23. New Tubes too silent (6P15P)
  24. best sounding & value amp kits/designs?
  25. Custom Woodwork For Tube Amp
  26. Tube 2E22 in triode mode
  27. Has anyone built an OTL amp with switch mode power supplies.
  28. Altec 15067 transformers
  29. Some interesting findings with transformers
  30. Bogen KO-60 Output Iron
  31. What would you do with Scott 222D IRON?
  32. Aikido vs CCDA
  33. wiring color code
  34. Maverick Audio TubeMagic D1 DAC
  35. Is one gz34 enough
  36. Edcor OPT opinions
  37. mengyue mini/ming da el34b
  38. I need a tube buffer circuit using a 12au7
  39. Stereo Amplifier Wood Enclosure
  40. What is the theoretical advantage of direct heated triodes?
  41. 6AS6 is useful for audio ?
  42. GM-70 design approach
  43. Ultimate emotion core material ( types of silicon steel , Permalloy or Amorphous etc)
  44. Looking to build my first tube amplifier
  45. Tube/SS opamp
  46. Biasing 6CA7/EL34 in Luxman LX33
  47. John Broskie MIA again?
  48. combine filament winding for rectifier
  49. HYBRID TUBE CFP
  50. 9302 Maggie Rebuild
  51. Pyramid-IX monoblock, 200W from 4x GU-50
  52. Suggestions of phono stage to build
  53. Do power transformers affect sound quality?
  54. Help with a Velleman K4040 ...
  55. Capacitor replacement confusion
  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. uC based Tube Curve Tracer Kit - Experts Opinion ?
  72. 250K Attenuator
  73. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  74. Daughters POD amp 13EM7 Pics
  75. Calculating Ripple Current with PSUD2
  76. Channel problem on 45 converted amp
  77. Want to make a tube preamp
  78. Marantz TC-5 choke value
  79. diference between schematics and pcb layout
  80. Would this work?
  81. Can old resistors go bad?
  82. Strange output tube behaviour
  83. Practical question: toroidal transformer / heater current / kt120
  84. Morgan Jones Power supply cap values
  85. Can use a ballast for a PSU??
  86. Looking for a OTL tube headphone amp design
  87. Relative Humidity Attenuating HF
  88. Parallel Output transformer question
  89. Need help to ID a tube...
  90. Modifications to Sennheiser VKS 203
  91. Onix SP3 integrated amp latest schematic
  92. Omit sp3 integrated amp latest schematic
  93. Help: Western Electric 102A Tube Datasheet and Test Settings
  94. Power and output transformer separated from amplifier
  95. discrete and simple VCCS
  96. heater wiring question
  97. What is the deal with Welborne Labs?
  98. Center Channel
  99. input stage problem help please!
  100. Tube Tips/Tricks for beginners
  101. Any skilled custom tube amplifier builders out there?
  102. Are these tubes really matched?
  103. Single Ended Amp
  104. Mighty Midget Problems
  105. Run the tube stuff in your car
  106. Jackson 648 test for 6973
  107. Space-charge tetrodes in Inverted Mode
  108. choosing input valve
  109. Rectifier characteristics
  110. Glass-ware?
  111. 5751 Mil spec tubes vrs 12AX7
  112. 47 pentode...fabulous sound !!!!
  113. Aikido preamp transformer question
  114. 40's tube receiver question
  115. W5m transformer
  116. Dual voltage PS filtering.
  117. OD3 150V tube regulator
  118. Fisher 500c
  119. Help with quad cap upgrade
  120. low voltage hybrid power amplifier
  121. Morgan Jones Kapacitors
  122. Which IR LED?
  123. Tube Frequency Response
  124. Big B+ voltage drop using diode rectifier.
  125. Triode ST70 kit schematic?
  126. 6AU6 replacement
  127. IT in cathode for driver class A2 tube
  128. Bogen MX30 Output Transformers
  129. Worlds Most Expensive Tube Amp !!!
  130. Blown screen resistor
  131. Blown screen resistor
  132. To ground plane or not?
  133. 5Z4PA Alternative?
  134. Question about chassis ground
  135. 6337- wtf is it?
  136. need ideers for a 6 channel amp
  137. sv572 transformer headache
  138. 6C33C / 6EM7
  139. 6146 TUBES ?
  140. Impedance matching
  141. QRP03 - Tube Buffered Gainclone
  142. Amp Cage Fababricators?
  143. PP KT88, Need help!
  144. Question regarding rectifier tube replacement
  145. Harmon Kardon A500
  146. Double triode 6SN7
  147. Tank's DIY tube preamp
  148. C core OPT for PP EL84
  149. amp diagram for KT88 and 300B on the same circuit
  150. Yaqin MS 34 D
  151. Tube buffer for amplifier with LM1875
  152. What is the best ?
  153. Fender DRRI tone
  154. DUKANE tube PA help
  155. Old tube? HELP RSE NP-7V-12 168810
  156. My first tube power amp
  157. Another mystery tube:
  158. Quad 22 Wiring
  159. Radford phase splitter again
  160. hookup wire source
  161. MCU adjustable fixed bias
  162. vr tube / glow tube as filter?
  163. Using phono stage only of preamp
  164. Correct settings for EBL21 and other tube on Hickok 539C
  165. Decca Portable Record Player model DPS8 Filter cap replacment
  166. 6V6 vs EL84 for output
  167. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  168. 2A3 with 12AT7
  169. Voltage rating of plate gyrator MOSFET
  170. Quad22 like preamplifier kit
  171. Push-pull implemented with KT88
  172. My QUAD 2 Restoration
  173. DIY High Power Car Tube Amp
  174. Perished insulation on transformer secondary - seems shorted. What can I do here?
  175. Need advice and help with new build
  176. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  177. Determining imput impedence of a preamp line stage
  178. Newb question on 12AU7 gain stage
  179. Valve Preamplifier Help
  180. OPT choices - 6L6 PPP
  181. MESA STRATEGY 400
  182. Shuguang, Beijing or Shanghai EL84 ?
  183. CJ PV-5 tubes
  184. Reference tube amp kit, <20 watts for under $1,000?
  185. ccs power supply 310a
  186. At what point does it become a "hybrid" ?
  187. Line filters
  188. Step-up MC transformer for Audio Research SP 6C
  189. Psud help.
  190. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  191. Repurposing heathkit s-2 electronic switch
  192. output cap bypass?
  193. 6e5p & 6c41 tube amplifier
  194. Looking for my first tube amp...
  195. Acceptable variance in plate voltage?
  196. SRPP bias calculation
  197. 6A3 test, what am I doing wrong?
  198. Goldline Phono Tube Pre Amp PCB - Analog Metric
  199. New Copper Nanoparticle Solder - Breakthrough?
  200. SRPP as a final stage? What do you think?
  201. Troughline Transmissionline theory explanation needed
  202. Help with odd bias method on Crown tube amp
  203. preamp output impedance matching
  204. KT66 Woes
  205. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  206. Cascode driver
  207. 2a3 DC coupled
  208. ECF/PCF 200, 201 B10B 10Pin Tubes
  209. Homemade EL84 Push-Pull amp doesn't work
  210. Tamradio Transformer
  211. Variable HF oscilator
  212. eico st70 dimming house lights and slowing turntable`
  213. Amplifier Calculators
  214. Are any of these tubes useful for audio
  215. Modifying a J Sound Lab 2A3 amplifier
  216. Experimentation - Power transformer as output
  217. Mullard with ECC99 Phase Splitter
  218. Killed an Edcor OPT. How?
  219. Silvertone 1482 Fuse Troubleshooter help
  220. If it ain't broke....
  221. Silly DHT question VaMax
  222. Recommendations for preamps with PCC88
  223. 6h23n same as 6n23p
  224. Mighty Midget Amplifier and speaker requirements.
  225. Bias Supply protection
  226. Tube Amp Schematics
  227. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  228. 6sn7 driving Push Pull Parallel kt88's?
  229. help with an old Peak ST-100 - single ended 6GW8
  230. Designing an 801 SET Class A2 Amp
  231. Grid choke considerations for 300b
  232. SE poweramp with best bass performance
  233. 45 Tube IN SET Amp
  234. what will happen?
  235. ECL86 PP Amp - Very low frequency clicking
  236. motor run cap question
  237. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  238. EL34 SET With No Driver Tube?
  239. Filter capacitors - motor run?
  240. Microwave transformers
  241. Capacitors in the cathode of preamp tubes
  242. How Many Tubes to a Rackspace?
  243. selenium diodes
  244. Is it possible to Oversize an SE OPT?
  245. questions about my ecc83 phono pre build
  246. PSU resistor temperature
  247. QE08-200
  248. Adding heater transformer to my 6b4g amp. help a noob please.
  249. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  250. Big Cap in luxman MB3045

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