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  1. Operating Modern 845s
  2. The Transcendent Sound Son of Beast OTL Master/Mod Thread.
  3. Neutralizing An Amplifier
  4. Stacked speakers driven by an SEP amp?
  5. Tube buffer suggestion for LM4702 amplifier?
  6. FWB Voltage Doubler with -Bias supply
  7. 500V SE pentode design
  8. single ended transformer driving 32ohm speaker
  9. uC based Tube Curve Tracer Kit - Experts Opinion ?
  10. 250K Attenuator
  11. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  12. Daughters POD amp 13EM7 Pics
  13. Calculating Ripple Current with PSUD2
  14. Channel problem on 45 converted amp
  15. Want to make a tube preamp
  16. Marantz TC-5 choke value
  17. diference between schematics and pcb layout
  18. Would this work?
  19. Can old resistors go bad?
  20. Strange output tube behaviour
  21. Practical question: toroidal transformer / heater current / kt120
  22. Morgan Jones Power supply cap values
  23. Can use a ballast for a PSU??
  24. Looking for a OTL tube headphone amp design
  25. Relative Humidity Attenuating HF
  26. Parallel Output transformer question
  27. Need help to ID a tube...
  28. Modifications to Sennheiser VKS 203
  29. Onix SP3 integrated amp latest schematic
  30. Omit sp3 integrated amp latest schematic
  31. Help: Western Electric 102A Tube Datasheet and Test Settings
  32. Power and output transformer separated from amplifier
  33. discrete and simple VCCS
  34. heater wiring question
  35. What is the deal with Welborne Labs?
  36. Center Channel
  37. input stage problem help please!
  38. Tube Tips/Tricks for beginners
  39. Any skilled custom tube amplifier builders out there?
  40. Are these tubes really matched?
  41. Single Ended Amp
  42. Mighty Midget Problems
  43. Run the tube stuff in your car
  44. Jackson 648 test for 6973
  45. Space-charge tetrodes in Inverted Mode
  46. choosing input valve
  47. Rectifier characteristics
  48. Glass-ware?
  49. 5751 Mil spec tubes vrs 12AX7
  50. 47 pentode...fabulous sound !!!!
  51. Aikido preamp transformer question
  52. 40's tube receiver question
  53. W5m transformer
  54. Dual voltage PS filtering.
  55. OD3 150V tube regulator
  56. Fisher 500c
  57. Help with quad cap upgrade
  58. low voltage hybrid power amplifier
  59. Morgan Jones Kapacitors
  60. Which IR LED?
  61. Tube Frequency Response
  62. Big B+ voltage drop using diode rectifier.
  63. Triode ST70 kit schematic?
  64. 6AU6 replacement
  65. IT in cathode for driver class A2 tube
  66. Bogen MX30 Output Transformers
  67. Worlds Most Expensive Tube Amp !!!
  68. Blown screen resistor
  69. Blown screen resistor
  70. To ground plane or not?
  71. 5Z4PA Alternative?
  72. Question about chassis ground
  73. 6337- wtf is it?
  74. need ideers for a 6 channel amp
  75. sv572 transformer headache
  76. 6C33C / 6EM7
  77. 6146 TUBES ?
  78. Impedance matching
  79. QRP03 - Tube Buffered Gainclone
  80. Amp Cage Fababricators?
  81. PP KT88, Need help!
  82. Question regarding rectifier tube replacement
  83. Harmon Kardon A500
  84. Double triode 6SN7
  85. Tank's DIY tube preamp
  86. C core OPT for PP EL84
  87. amp diagram for KT88 and 300B on the same circuit
  88. Yaqin MS 34 D
  89. Tube buffer for amplifier with LM1875
  90. What is the best ?
  91. Fender DRRI tone
  92. DUKANE tube PA help
  93. Old tube? HELP RSE NP-7V-12 168810
  94. My first tube power amp
  95. Another mystery tube:
  96. Quad 22 Wiring
  97. Radford phase splitter again
  98. hookup wire source
  99. MCU adjustable fixed bias
  100. vr tube / glow tube as filter?
  101. Using phono stage only of preamp
  102. Correct settings for EBL21 and other tube on Hickok 539C
  103. Decca Portable Record Player model DPS8 Filter cap replacment
  104. 6V6 vs EL84 for output
  105. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  106. 2A3 with 12AT7
  107. Voltage rating of plate gyrator MOSFET
  108. Quad22 like preamplifier kit
  109. Push-pull implemented with KT88
  110. My QUAD 2 Restoration
  111. DIY High Power Car Tube Amp
  112. Perished insulation on transformer secondary - seems shorted. What can I do here?
  113. Need advice and help with new build
  114. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  115. Determining imput impedence of a preamp line stage
  116. Newb question on 12AU7 gain stage
  117. Valve Preamplifier Help
  118. OPT choices - 6L6 PPP
  119. MESA STRATEGY 400
  120. Shuguang, Beijing or Shanghai EL84 ?
  121. CJ PV-5 tubes
  122. Reference tube amp kit, <20 watts for under $1,000?
  123. ccs power supply 310a
  124. At what point does it become a "hybrid" ?
  125. Line filters
  126. Step-up MC transformer for Audio Research SP 6C
  127. Psud help.
  128. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  129. Repurposing heathkit s-2 electronic switch
  130. output cap bypass?
  131. 6e5p & 6c41 tube amplifier
  132. Looking for my first tube amp...
  133. Acceptable variance in plate voltage?
  134. SRPP bias calculation
  135. 6A3 test, what am I doing wrong?
  136. Goldline Phono Tube Pre Amp PCB - Analog Metric
  137. New Copper Nanoparticle Solder - Breakthrough?
  138. SRPP as a final stage? What do you think?
  139. Troughline Transmissionline theory explanation needed
  140. Help with odd bias method on Crown tube amp
  141. preamp output impedance matching
  142. KT66 Woes
  143. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  144. Cascode driver
  145. 2a3 DC coupled
  146. ECF/PCF 200, 201 B10B 10Pin Tubes
  147. Homemade EL84 Push-Pull amp doesn't work
  148. Tamradio Transformer
  149. Variable HF oscilator
  150. eico st70 dimming house lights and slowing turntable`
  151. Amplifier Calculators
  152. Are any of these tubes useful for audio
  153. Modifying a J Sound Lab 2A3 amplifier
  154. Experimentation - Power transformer as output
  155. Mullard with ECC99 Phase Splitter
  156. Killed an Edcor OPT. How?
  157. Silvertone 1482 Fuse Troubleshooter help
  158. If it ain't broke....
  159. Silly DHT question VaMax
  160. Recommendations for preamps with PCC88
  161. 6h23n same as 6n23p
  162. Mighty Midget Amplifier and speaker requirements.
  163. Bias Supply protection
  164. Tube Amp Schematics
  165. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  166. 6sn7 driving Push Pull Parallel kt88's?
  167. help with an old Peak ST-100 - single ended 6GW8
  168. Designing an 801 SET Class A2 Amp
  169. Grid choke considerations for 300b
  170. SE poweramp with best bass performance
  171. 45 Tube IN SET Amp
  172. what will happen?
  173. ECL86 PP Amp - Very low frequency clicking
  174. motor run cap question
  175. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  176. EL34 SET With No Driver Tube?
  177. Filter capacitors - motor run?
  178. Microwave transformers
  179. Capacitors in the cathode of preamp tubes
  180. How Many Tubes to a Rackspace?
  181. selenium diodes
  182. Is it possible to Oversize an SE OPT?
  183. questions about my ecc83 phono pre build
  184. PSU resistor temperature
  185. QE08-200
  186. Adding heater transformer to my 6b4g amp. help a noob please.
  187. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  188. Big Cap in luxman MB3045
  189. Question about 4x12 cabinet wiring
  190. What happened to Sakuma-san's website ?
  191. Should I ???
  192. Can you classify condition of tubes?
  193. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  194. ecc99 preamp into an amp
  195. AI 500 Volume pot advice wanted.
  196. eico st70 input impedance question
  197. Tube Preamp or Power Amp?
  198. pmillett "Engineer's Amplifier" to mono?
  199. Advice/schematics wanted for HF-81 opt project
  200. 7591 tube, can't find that number on tester.
  201. valve upgrade
  202. has anyone known about Ming Da amplifiers
  203. A nice little valve amplifier
  204. Use rectifier winding for 6.3V DC heater?
  205. Voltage Regulators Zener / Gas Reg
  206. Looking for first tube amp kit.
  207. Which choke is better ?
  208. UK input voltage question
  209. 1sh29b
  210. 6G2 amp - volume and tone play up on one input only
  211. One channel grainy sound
  212. anybody know 6BY5 plate resistance ?
  213. SE 6550
  214. Yaqin MC-100b Volume pot
  215. Pair of possible MC step ups - octal mount
  216. My Mighty Midget
  217. Conrad Johnson MV75 "update circuit drawing"
  218. Cheap Red LED bias on ecc83/12ax7
  219. stoneAmp
  220. Project thread: KT88 PP amp
  221. I need the voltages or schematic for a Magnavox 177.55 amp
  222. Different PSE output designs - which to use?
  223. Toroidal (adding a winding)
  224. Kondo Souga - audition
  225. Electrocube Polyestyrene caps
  226. a incar tube/valve line driver
  227. Before I punch the holes.. A quartet of EL84?
  228. Tubes Home Theater 4+1
  229. DAC direct out, not enough gain, help me build a driving stage.
  230. ultra linear aikido with linearizing pentode
  231. Scott 299
  232. OPTs With Multiple Secondaries
  233. Over Four Tons Of Tubes
  234. L channel lower output?
  235. 16LS Amp by S5 Electronics Questions
  236. Heathkit WM-5
  237. 6BL8 not on roll chart
  238. CJ PV-5 PS rebuild
  239. Attenuator for passive pre (LEAK ST 20)
  240. Help ID tubes Plz
  241. Data sheet and load line question
  242. Trouble with Silver to Black face twin mod.
  243. Grommes S35 booster amp output?
  244. dc filament heater - high impedance const. voltage
  245. Schematic for Modwright SWL 9.0se Preamp
  246. GZ37 substitutes
  247. output attenuation
  248. My humming home made tube amp
  249. Shared Cathodes 300b
  250. Bogen CHB-35 for Music...

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