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  1. John Broskie MIA again?
  2. combine filament winding for rectifier
  3. HYBRID TUBE CFP
  4. 9302 Maggie Rebuild
  5. Pyramid-IX monoblock, 200W from 4x GU-50
  6. Suggestions of phono stage to build
  7. Do power transformers affect sound quality?
  8. Help with a Velleman K4040 ...
  9. Capacitor replacement confusion
  10. RCA PA Amplifer, Input Transformers
  11. Channel imbalance Xiang Sheng DAC-01
  12. ARC M100s
  13. pros & cons of current mirror to balance a push-pull ?
  14. Wright Audio WLA10 help needed
  15. The Best tube/valve sound!?
  16. Mcintosh MC1000 and Ming Da MC300-PRE
  17. Operating Modern 845s
  18. The Transcendent Sound Son of Beast OTL Master/Mod Thread.
  19. Neutralizing An Amplifier
  20. Stacked speakers driven by an SEP amp?
  21. Tube buffer suggestion for LM4702 amplifier?
  22. FWB Voltage Doubler with -Bias supply
  23. 500V SE pentode design
  24. single ended transformer driving 32ohm speaker
  25. uC based Tube Curve Tracer Kit - Experts Opinion ?
  26. 250K Attenuator
  27. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  28. Daughters POD amp 13EM7 Pics
  29. Calculating Ripple Current with PSUD2
  30. Channel problem on 45 converted amp
  31. Want to make a tube preamp
  32. Marantz TC-5 choke value
  33. diference between schematics and pcb layout
  34. Would this work?
  35. Can old resistors go bad?
  36. Strange output tube behaviour
  37. Practical question: toroidal transformer / heater current / kt120
  38. Morgan Jones Power supply cap values
  39. Can use a ballast for a PSU??
  40. Looking for a OTL tube headphone amp design
  41. Relative Humidity Attenuating HF
  42. Parallel Output transformer question
  43. Need help to ID a tube...
  44. Modifications to Sennheiser VKS 203
  45. Onix SP3 integrated amp latest schematic
  46. Omit sp3 integrated amp latest schematic
  47. Help: Western Electric 102A Tube Datasheet and Test Settings
  48. Power and output transformer separated from amplifier
  49. discrete and simple VCCS
  50. heater wiring question
  51. What is the deal with Welborne Labs?
  52. Center Channel
  53. input stage problem help please!
  54. Tube Tips/Tricks for beginners
  55. Any skilled custom tube amplifier builders out there?
  56. Are these tubes really matched?
  57. Single Ended Amp
  58. Mighty Midget Problems
  59. Run the tube stuff in your car
  60. Jackson 648 test for 6973
  61. Space-charge tetrodes in Inverted Mode
  62. choosing input valve
  63. Rectifier characteristics
  64. Glass-ware?
  65. 5751 Mil spec tubes vrs 12AX7
  66. 47 pentode...fabulous sound !!!!
  67. Aikido preamp transformer question
  68. 40's tube receiver question
  69. W5m transformer
  70. Dual voltage PS filtering.
  71. OD3 150V tube regulator
  72. Fisher 500c
  73. Help with quad cap upgrade
  74. low voltage hybrid power amplifier
  75. Morgan Jones Kapacitors
  76. Which IR LED?
  77. Tube Frequency Response
  78. Big B+ voltage drop using diode rectifier.
  79. Triode ST70 kit schematic?
  80. 6AU6 replacement
  81. IT in cathode for driver class A2 tube
  82. Bogen MX30 Output Transformers
  83. Worlds Most Expensive Tube Amp !!!
  84. Blown screen resistor
  85. Blown screen resistor
  86. To ground plane or not?
  87. 5Z4PA Alternative?
  88. Question about chassis ground
  89. 6337- wtf is it?
  90. need ideers for a 6 channel amp
  91. sv572 transformer headache
  92. 6C33C / 6EM7
  93. 6146 TUBES ?
  94. Impedance matching
  95. QRP03 - Tube Buffered Gainclone
  96. Amp Cage Fababricators?
  97. PP KT88, Need help!
  98. Question regarding rectifier tube replacement
  99. Harmon Kardon A500
  100. Double triode 6SN7
  101. Tank's DIY tube preamp
  102. C core OPT for PP EL84
  103. amp diagram for KT88 and 300B on the same circuit
  104. Yaqin MS 34 D
  105. Tube buffer for amplifier with LM1875
  106. What is the best ?
  107. Fender DRRI tone
  108. DUKANE tube PA help
  109. Old tube? HELP RSE NP-7V-12 168810
  110. My first tube power amp
  111. Another mystery tube:
  112. Quad 22 Wiring
  113. Radford phase splitter again
  114. hookup wire source
  115. MCU adjustable fixed bias
  116. vr tube / glow tube as filter?
  117. Using phono stage only of preamp
  118. Correct settings for EBL21 and other tube on Hickok 539C
  119. Decca Portable Record Player model DPS8 Filter cap replacment
  120. 6V6 vs EL84 for output
  121. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  122. 2A3 with 12AT7
  123. Voltage rating of plate gyrator MOSFET
  124. Quad22 like preamplifier kit
  125. Push-pull implemented with KT88
  126. My QUAD 2 Restoration
  127. DIY High Power Car Tube Amp
  128. Perished insulation on transformer secondary - seems shorted. What can I do here?
  129. Need advice and help with new build
  130. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  131. Determining imput impedence of a preamp line stage
  132. Newb question on 12AU7 gain stage
  133. Valve Preamplifier Help
  134. OPT choices - 6L6 PPP
  135. MESA STRATEGY 400
  136. Shuguang, Beijing or Shanghai EL84 ?
  137. CJ PV-5 tubes
  138. Reference tube amp kit, <20 watts for under $1,000?
  139. ccs power supply 310a
  140. At what point does it become a "hybrid" ?
  141. Line filters
  142. Step-up MC transformer for Audio Research SP 6C
  143. Psud help.
  144. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  145. Repurposing heathkit s-2 electronic switch
  146. output cap bypass?
  147. 6e5p & 6c41 tube amplifier
  148. Looking for my first tube amp...
  149. Acceptable variance in plate voltage?
  150. SRPP bias calculation
  151. 6A3 test, what am I doing wrong?
  152. Goldline Phono Tube Pre Amp PCB - Analog Metric
  153. New Copper Nanoparticle Solder - Breakthrough?
  154. SRPP as a final stage? What do you think?
  155. Troughline Transmissionline theory explanation needed
  156. Help with odd bias method on Crown tube amp
  157. preamp output impedance matching
  158. KT66 Woes
  159. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  160. Cascode driver
  161. 2a3 DC coupled
  162. ECF/PCF 200, 201 B10B 10Pin Tubes
  163. Homemade EL84 Push-Pull amp doesn't work
  164. Tamradio Transformer
  165. Variable HF oscilator
  166. eico st70 dimming house lights and slowing turntable`
  167. Amplifier Calculators
  168. Are any of these tubes useful for audio
  169. Modifying a J Sound Lab 2A3 amplifier
  170. Experimentation - Power transformer as output
  171. Mullard with ECC99 Phase Splitter
  172. Killed an Edcor OPT. How?
  173. Silvertone 1482 Fuse Troubleshooter help
  174. If it ain't broke....
  175. Silly DHT question VaMax
  176. Recommendations for preamps with PCC88
  177. 6h23n same as 6n23p
  178. Mighty Midget Amplifier and speaker requirements.
  179. Bias Supply protection
  180. Tube Amp Schematics
  181. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  182. 6sn7 driving Push Pull Parallel kt88's?
  183. help with an old Peak ST-100 - single ended 6GW8
  184. Designing an 801 SET Class A2 Amp
  185. Grid choke considerations for 300b
  186. SE poweramp with best bass performance
  187. 45 Tube IN SET Amp
  188. what will happen?
  189. ECL86 PP Amp - Very low frequency clicking
  190. motor run cap question
  191. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  192. EL34 SET With No Driver Tube?
  193. Filter capacitors - motor run?
  194. Microwave transformers
  195. Capacitors in the cathode of preamp tubes
  196. How Many Tubes to a Rackspace?
  197. selenium diodes
  198. Is it possible to Oversize an SE OPT?
  199. questions about my ecc83 phono pre build
  200. PSU resistor temperature
  201. QE08-200
  202. Adding heater transformer to my 6b4g amp. help a noob please.
  203. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  204. Big Cap in luxman MB3045
  205. Question about 4x12 cabinet wiring
  206. What happened to Sakuma-san's website ?
  207. Should I ???
  208. Can you classify condition of tubes?
  209. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  210. ecc99 preamp into an amp
  211. AI 500 Volume pot advice wanted.
  212. eico st70 input impedance question
  213. Tube Preamp or Power Amp?
  214. pmillett "Engineer's Amplifier" to mono?
  215. Advice/schematics wanted for HF-81 opt project
  216. 7591 tube, can't find that number on tester.
  217. valve upgrade
  218. has anyone known about Ming Da amplifiers
  219. A nice little valve amplifier
  220. Use rectifier winding for 6.3V DC heater?
  221. Voltage Regulators Zener / Gas Reg
  222. Looking for first tube amp kit.
  223. Which choke is better ?
  224. UK input voltage question
  225. 1sh29b
  226. 6G2 amp - volume and tone play up on one input only
  227. One channel grainy sound
  228. anybody know 6BY5 plate resistance ?
  229. SE 6550
  230. Yaqin MC-100b Volume pot
  231. Pair of possible MC step ups - octal mount
  232. My Mighty Midget
  233. Conrad Johnson MV75 "update circuit drawing"
  234. Cheap Red LED bias on ecc83/12ax7
  235. stoneAmp
  236. Project thread: KT88 PP amp
  237. I need the voltages or schematic for a Magnavox 177.55 amp
  238. Different PSE output designs - which to use?
  239. Toroidal (adding a winding)
  240. Kondo Souga - audition
  241. Electrocube Polyestyrene caps
  242. a incar tube/valve line driver
  243. Before I punch the holes.. A quartet of EL84?
  244. Tubes Home Theater 4+1
  245. DAC direct out, not enough gain, help me build a driving stage.
  246. ultra linear aikido with linearizing pentode
  247. Scott 299
  248. OPTs With Multiple Secondaries
  249. Over Four Tons Of Tubes
  250. L channel lower output?

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