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  1. Tube Tips/Tricks for beginners
  2. Any skilled custom tube amplifier builders out there?
  3. Are these tubes really matched?
  4. Single Ended Amp
  5. Mighty Midget Problems
  6. Run the tube stuff in your car
  7. Jackson 648 test for 6973
  8. Space-charge tetrodes in Inverted Mode
  9. choosing input valve
  10. Rectifier characteristics
  11. Glass-ware?
  12. 5751 Mil spec tubes vrs 12AX7
  13. 47 pentode...fabulous sound !!!!
  14. Aikido preamp transformer question
  15. 40's tube receiver question
  16. W5m transformer
  17. Dual voltage PS filtering.
  18. OD3 150V tube regulator
  19. Fisher 500c
  20. Help with quad cap upgrade
  21. low voltage hybrid power amplifier
  22. Morgan Jones Kapacitors
  23. Which IR LED?
  24. Tube Frequency Response
  25. Big B+ voltage drop using diode rectifier.
  26. Triode ST70 kit schematic?
  27. 6AU6 replacement
  28. IT in cathode for driver class A2 tube
  29. Bogen MX30 Output Transformers
  30. Worlds Most Expensive Tube Amp !!!
  31. Blown screen resistor
  32. Blown screen resistor
  33. To ground plane or not?
  34. 5Z4PA Alternative?
  35. Question about chassis ground
  36. 6337- wtf is it?
  37. need ideers for a 6 channel amp
  38. sv572 transformer headache
  39. 6C33C / 6EM7
  40. 6146 TUBES ?
  41. Impedance matching
  42. QRP03 - Tube Buffered Gainclone
  43. Amp Cage Fababricators?
  44. PP KT88, Need help!
  45. Question regarding rectifier tube replacement
  46. Harmon Kardon A500
  47. Double triode 6SN7
  48. Tank's DIY tube preamp
  49. C core OPT for PP EL84
  50. amp diagram for KT88 and 300B on the same circuit
  51. Yaqin MS 34 D
  52. Tube buffer for amplifier with LM1875
  53. What is the best ?
  54. Fender DRRI tone
  55. DUKANE tube PA help
  56. Old tube? HELP RSE NP-7V-12 168810
  57. My first tube power amp
  58. Another mystery tube:
  59. Quad 22 Wiring
  60. Radford phase splitter again
  61. hookup wire source
  62. MCU adjustable fixed bias
  63. vr tube / glow tube as filter?
  64. Using phono stage only of preamp
  65. Correct settings for EBL21 and other tube on Hickok 539C
  66. Decca Portable Record Player model DPS8 Filter cap replacment
  67. 6V6 vs EL84 for output
  68. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  69. 2A3 with 12AT7
  70. Voltage rating of plate gyrator MOSFET
  71. Quad22 like preamplifier kit
  72. Push-pull implemented with KT88
  73. My QUAD 2 Restoration
  74. DIY High Power Car Tube Amp
  75. Perished insulation on transformer secondary - seems shorted. What can I do here?
  76. Need advice and help with new build
  77. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  78. Determining imput impedence of a preamp line stage
  79. Newb question on 12AU7 gain stage
  80. Valve Preamplifier Help
  81. OPT choices - 6L6 PPP
  82. MESA STRATEGY 400
  83. Shuguang, Beijing or Shanghai EL84 ?
  84. CJ PV-5 tubes
  85. Reference tube amp kit, <20 watts for under $1,000?
  86. ccs power supply 310a
  87. At what point does it become a "hybrid" ?
  88. Line filters
  89. Step-up MC transformer for Audio Research SP 6C
  90. Psud help.
  91. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  92. Repurposing heathkit s-2 electronic switch
  93. output cap bypass?
  94. 6e5p & 6c41 tube amplifier
  95. Looking for my first tube amp...
  96. Acceptable variance in plate voltage?
  97. SRPP bias calculation
  98. 6A3 test, what am I doing wrong?
  99. Goldline Phono Tube Pre Amp PCB - Analog Metric
  100. New Copper Nanoparticle Solder - Breakthrough?
  101. SRPP as a final stage? What do you think?
  102. Troughline Transmissionline theory explanation needed
  103. Help with odd bias method on Crown tube amp
  104. preamp output impedance matching
  105. KT66 Woes
  106. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  107. Cascode driver
  108. 2a3 DC coupled
  109. ECF/PCF 200, 201 B10B 10Pin Tubes
  110. Homemade EL84 Push-Pull amp doesn't work
  111. Tamradio Transformer
  112. Variable HF oscilator
  113. eico st70 dimming house lights and slowing turntable`
  114. Amplifier Calculators
  115. Are any of these tubes useful for audio
  116. Modifying a J Sound Lab 2A3 amplifier
  117. Experimentation - Power transformer as output
  118. Mullard with ECC99 Phase Splitter
  119. Killed an Edcor OPT. How?
  120. Silvertone 1482 Fuse Troubleshooter help
  121. If it ain't broke....
  122. Silly DHT question VaMax
  123. Recommendations for preamps with PCC88
  124. 6h23n same as 6n23p
  125. Mighty Midget Amplifier and speaker requirements.
  126. Bias Supply protection
  127. Tube Amp Schematics
  128. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  129. 6sn7 driving Push Pull Parallel kt88's?
  130. help with an old Peak ST-100 - single ended 6GW8
  131. Designing an 801 SET Class A2 Amp
  132. Grid choke considerations for 300b
  133. SE poweramp with best bass performance
  134. 45 Tube IN SET Amp
  135. what will happen?
  136. ECL86 PP Amp - Very low frequency clicking
  137. motor run cap question
  138. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  139. EL34 SET With No Driver Tube?
  140. Filter capacitors - motor run?
  141. Microwave transformers
  142. Capacitors in the cathode of preamp tubes
  143. How Many Tubes to a Rackspace?
  144. selenium diodes
  145. Is it possible to Oversize an SE OPT?
  146. questions about my ecc83 phono pre build
  147. PSU resistor temperature
  148. QE08-200
  149. Adding heater transformer to my 6b4g amp. help a noob please.
  150. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  151. Big Cap in luxman MB3045
  152. Question about 4x12 cabinet wiring
  153. What happened to Sakuma-san's website ?
  154. Should I ???
  155. Can you classify condition of tubes?
  156. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  157. ecc99 preamp into an amp
  158. AI 500 Volume pot advice wanted.
  159. eico st70 input impedance question
  160. Tube Preamp or Power Amp?
  161. pmillett "Engineer's Amplifier" to mono?
  162. Advice/schematics wanted for HF-81 opt project
  163. 7591 tube, can't find that number on tester.
  164. valve upgrade
  165. has anyone known about Ming Da amplifiers
  166. A nice little valve amplifier
  167. Use rectifier winding for 6.3V DC heater?
  168. Voltage Regulators Zener / Gas Reg
  169. Looking for first tube amp kit.
  170. Which choke is better ?
  171. UK input voltage question
  172. 1sh29b
  173. 6G2 amp - volume and tone play up on one input only
  174. One channel grainy sound
  175. anybody know 6BY5 plate resistance ?
  176. SE 6550
  177. Yaqin MC-100b Volume pot
  178. Pair of possible MC step ups - octal mount
  179. My Mighty Midget
  180. Conrad Johnson MV75 "update circuit drawing"
  181. Cheap Red LED bias on ecc83/12ax7
  182. stoneAmp
  183. Project thread: KT88 PP amp
  184. I need the voltages or schematic for a Magnavox 177.55 amp
  185. Different PSE output designs - which to use?
  186. Toroidal (adding a winding)
  187. Kondo Souga - audition
  188. Electrocube Polyestyrene caps
  189. a incar tube/valve line driver
  190. Before I punch the holes.. A quartet of EL84?
  191. Tubes Home Theater 4+1
  192. DAC direct out, not enough gain, help me build a driving stage.
  193. ultra linear aikido with linearizing pentode
  194. Scott 299
  195. OPTs With Multiple Secondaries
  196. Over Four Tons Of Tubes
  197. L channel lower output?
  198. 16LS Amp by S5 Electronics Questions
  199. Heathkit WM-5
  200. 6BL8 not on roll chart
  201. CJ PV-5 PS rebuild
  202. Attenuator for passive pre (LEAK ST 20)
  203. Help ID tubes Plz
  204. Data sheet and load line question
  205. Trouble with Silver to Black face twin mod.
  206. Grommes S35 booster amp output?
  207. dc filament heater - high impedance const. voltage
  208. Schematic for Modwright SWL 9.0se Preamp
  209. GZ37 substitutes
  210. output attenuation
  211. My humming home made tube amp
  212. Shared Cathodes 300b
  213. Bogen CHB-35 for Music...
  214. correctly connecting PT for 110/220 volts
  215. voltage divider
  216. "Bypass caps" and their effect on perceived sound
  217. Repair of Cayin HA-2 Tube Headphone Amp
  218. Best Drive for EL34
  219. Needing Schematic for Grommes LJ7 please.
  220. 6550C v. KT88
  221. ECC81 MU-Follower consumption
  222. Locating hum source
  223. c3g self oscillation problem - a newbie needs help!
  224. Voice of music console help
  225. One tube radio
  226. Triodes with better "look&feel"
  227. HV Supply
  228. Will this arrangement impact the input impedence of the cathode follower?
  229. Measuring preamp output impedance
  230. Capacitor from 120VAC to ground
  231. I have power but no sound???
  232. Using a function generator with a tube amp?
  233. What resistors to use on KT88s tubes?
  234. Opinions on Raysonic sp-200 + Raysonic 168 CD
  235. Lab power supply for testing tubes
  236. Could really use some help here!
  237. Help~ GU50 ?
  238. Some Power Supply Help
  239. newbies beware of lampizator srpp pdf
  240. Headphone output
  241. Has anyone played around with this as an amp front end?
  242. Help for Dynavox VR-70E
  243. Heathkit TT-1 (testing a 199, 99 tube)
  244. Tube And Transformer I/V Converter For Differential Current DAC
  245. Volume increases as amp warms up
  246. New 6V6 Build - Suggestions Needed
  247. Tubes Numbers
  248. VTL
  249. Visit to KR audio Prague 20120921
  250. Where did he posted it?

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