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  1. Channel problem on 45 converted amp
  2. Want to make a tube preamp
  3. Marantz TC-5 choke value
  4. diference between schematics and pcb layout
  5. Would this work?
  6. Can old resistors go bad?
  7. Strange output tube behaviour
  8. Practical question: toroidal transformer / heater current / kt120
  9. Morgan Jones Power supply cap values
  10. Can use a ballast for a PSU??
  11. Looking for a OTL tube headphone amp design
  12. Relative Humidity Attenuating HF
  13. Parallel Output transformer question
  14. Need help to ID a tube...
  15. Modifications to Sennheiser VKS 203
  16. Onix SP3 integrated amp latest schematic
  17. Omit sp3 integrated amp latest schematic
  18. Help: Western Electric 102A Tube Datasheet and Test Settings
  19. Power and output transformer separated from amplifier
  20. discrete and simple VCCS
  21. heater wiring question
  22. What is the deal with Welborne Labs?
  23. Center Channel
  24. input stage problem help please!
  25. Tube Tips/Tricks for beginners
  26. Any skilled custom tube amplifier builders out there?
  27. Are these tubes really matched?
  28. Single Ended Amp
  29. Mighty Midget Problems
  30. Run the tube stuff in your car
  31. Jackson 648 test for 6973
  32. Space-charge tetrodes in Inverted Mode
  33. choosing input valve
  34. Rectifier characteristics
  35. Glass-ware?
  36. 5751 Mil spec tubes vrs 12AX7
  37. 47 pentode...fabulous sound !!!!
  38. Aikido preamp transformer question
  39. 40's tube receiver question
  40. W5m transformer
  41. Dual voltage PS filtering.
  42. OD3 150V tube regulator
  43. Fisher 500c
  44. Help with quad cap upgrade
  45. low voltage hybrid power amplifier
  46. Which IR LED?
  47. Tube Frequency Response
  48. Big B+ voltage drop using diode rectifier.
  49. Triode ST70 kit schematic?
  50. 6AU6 replacement
  51. IT in cathode for driver class A2 tube
  52. Bogen MX30 Output Transformers
  53. Worlds Most Expensive Tube Amp !!!
  54. Blown screen resistor
  55. To ground plane or not?
  56. 5Z4PA Alternative?
  57. Question about chassis ground
  58. 6337- wtf is it?
  59. need ideers for a 6 channel amp
  60. sv572 transformer headache
  61. 6C33C / 6EM7
  62. 6146 TUBES ?
  63. Impedance matching
  64. QRP03 - Tube Buffered Gainclone
  65. Amp Cage Fababricators?
  66. PP KT88, Need help!
  67. Question regarding rectifier tube replacement
  68. Harmon Kardon A500
  69. Double triode 6SN7
  70. Tank's DIY tube preamp
  71. C core OPT for PP EL84
  72. amp diagram for KT88 and 300B on the same circuit
  73. Yaqin MS 34 D
  74. Tube buffer for amplifier with LM1875
  75. What is the best ?
  76. DUKANE tube PA help
  77. Old tube? HELP RSE NP-7V-12 168810
  78. My first tube power amp
  79. Another mystery tube:
  80. Quad 22 Wiring
  81. Radford phase splitter again
  82. hookup wire source
  83. MCU adjustable fixed bias
  84. vr tube / glow tube as filter?
  85. Using phono stage only of preamp
  86. Decca Portable Record Player model DPS8 Filter cap replacment
  87. 6V6 vs EL84 for output
  88. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  89. 2A3 with 12AT7
  90. Voltage rating of plate gyrator MOSFET
  91. Quad22 like preamplifier kit
  92. Push-pull implemented with KT88
  93. My QUAD 2 Restoration
  94. DIY High Power Car Tube Amp
  95. Perished insulation on transformer secondary - seems shorted. What can I do here?
  96. Need advice and help with new build
  97. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  98. Determining imput impedence of a preamp line stage
  99. Newb question on 12AU7 gain stage
  100. Valve Preamplifier Help
  101. OPT choices - 6L6 PPP
  102. MESA STRATEGY 400
  103. Shuguang, Beijing or Shanghai EL84 ?
  104. CJ PV-5 tubes
  105. Reference tube amp kit, <20 watts for under $1,000?
  106. ccs power supply 310a
  107. At what point does it become a "hybrid" ?
  108. Line filters
  109. Step-up MC transformer for Audio Research SP 6C
  110. Psud help.
  111. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  112. Repurposing heathkit s-2 electronic switch
  113. output cap bypass?
  114. 6e5p & 6c41 tube amplifier
  115. Looking for my first tube amp...
  116. Acceptable variance in plate voltage?
  117. SRPP bias calculation
  118. 6A3 test, what am I doing wrong?
  119. Goldline Phono Tube Pre Amp PCB - Analog Metric
  120. New Copper Nanoparticle Solder - Breakthrough?
  121. SRPP as a final stage? What do you think?
  122. Troughline Transmissionline theory explanation needed
  123. Help with odd bias method on Crown tube amp
  124. preamp output impedance matching
  125. KT66 Woes
  126. Cascode driver
  127. 2a3 DC coupled
  128. ECF/PCF 200, 201 B10B 10Pin Tubes
  129. Homemade EL84 Push-Pull amp doesn't work
  130. Tamradio Transformer
  131. Variable HF oscilator
  132. eico st70 dimming house lights and slowing turntable`
  133. Amplifier Calculators
  134. Are any of these tubes useful for audio
  135. Modifying a J Sound Lab 2A3 amplifier
  136. Experimentation - Power transformer as output
  137. Mullard with ECC99 Phase Splitter
  138. Killed an Edcor OPT. How?
  139. If it ain't broke....
  140. Silly DHT question VaMax
  141. Recommendations for preamps with PCC88
  142. 6h23n same as 6n23p
  143. Mighty Midget Amplifier and speaker requirements.
  144. Bias Supply protection
  145. Tube Amp Schematics
  146. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  147. 6sn7 driving Push Pull Parallel kt88's?
  148. help with an old Peak ST-100 - single ended 6GW8
  149. Designing an 801 SET Class A2 Amp
  150. Grid choke considerations for 300b
  151. SE poweramp with best bass performance
  152. 45 Tube IN SET Amp
  153. what will happen?
  154. ECL86 PP Amp - Very low frequency clicking
  155. motor run cap question
  156. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  157. EL34 SET With No Driver Tube?
  158. Filter capacitors - motor run?
  159. Microwave transformers
  160. Capacitors in the cathode of preamp tubes
  161. How Many Tubes to a Rackspace?
  162. selenium diodes
  163. Is it possible to Oversize an SE OPT?
  164. questions about my ecc83 phono pre build
  165. PSU resistor temperature
  166. QE08-200
  167. Adding heater transformer to my 6b4g amp. help a noob please.
  168. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  169. Big Cap in luxman MB3045
  170. Question about 4x12 cabinet wiring
  171. What happened to Sakuma-san's website ?
  172. Should I ???
  173. Can you classify condition of tubes?
  174. ecc99 preamp into an amp
  175. AI 500 Volume pot advice wanted.
  176. eico st70 input impedance question
  177. Tube Preamp or Power Amp?
  178. pmillett "Engineer's Amplifier" to mono?
  179. Advice/schematics wanted for HF-81 opt project
  180. valve upgrade
  181. has anyone known about Ming Da amplifiers
  182. A nice little valve amplifier
  183. Use rectifier winding for 6.3V DC heater?
  184. Voltage Regulators Zener / Gas Reg
  185. Looking for first tube amp kit.
  186. UK input voltage question
  187. 1sh29b
  188. 6G2 amp - volume and tone play up on one input only
  189. One channel grainy sound
  190. anybody know 6BY5 plate resistance ?
  191. SE 6550
  192. Yaqin MC-100b Volume pot
  193. Pair of possible MC step ups - octal mount
  194. My Mighty Midget
  195. Conrad Johnson MV75 "update circuit drawing"
  196. Cheap Red LED bias on ecc83/12ax7
  197. stoneAmp
  198. Project thread: KT88 PP amp
  199. I need the voltages or schematic for a Magnavox 177.55 amp
  200. Different PSE output designs - which to use?
  201. Toroidal (adding a winding)
  202. Kondo Souga - audition
  203. a incar tube/valve line driver
  204. Before I punch the holes.. A quartet of EL84?
  205. Tubes Home Theater 4+1
  206. DAC direct out, not enough gain, help me build a driving stage.
  207. ultra linear aikido with linearizing pentode
  208. Scott 299
  209. OPTs With Multiple Secondaries
  210. Over Four Tons Of Tubes
  211. L channel lower output?
  212. 16LS Amp by S5 Electronics Questions
  213. Heathkit WM-5
  214. 6BL8 not on roll chart
  215. CJ PV-5 PS rebuild
  216. Attenuator for passive pre (LEAK ST 20)
  217. Help ID tubes Plz
  218. Data sheet and load line question
  219. Trouble with Silver to Black face twin mod.
  220. Grommes S35 booster amp output?
  221. dc filament heater - high impedance const. voltage
  222. Schematic for Modwright SWL 9.0se Preamp
  223. GZ37 substitutes
  224. output attenuation
  225. My humming home made tube amp
  226. Shared Cathodes 300b
  227. Bogen CHB-35 for Music...
  228. correctly connecting PT for 110/220 volts
  229. voltage divider
  230. "Bypass caps" and their effect on perceived sound
  231. Repair of Cayin HA-2 Tube Headphone Amp
  232. Best Drive for EL34
  233. Needing Schematic for Grommes LJ7 please.
  234. 6550C v. KT88
  235. ECC81 MU-Follower consumption
  236. Locating hum source
  237. c3g self oscillation problem - a newbie needs help!
  238. Voice of music console help
  239. One tube radio
  240. Triodes with better "look&feel"
  241. HV Supply
  242. Will this arrangement impact the input impedence of the cathode follower?
  243. Measuring preamp output impedance
  244. Capacitor from 120VAC to ground
  245. I have power but no sound???
  246. Using a function generator with a tube amp?
  247. What resistors to use on KT88s tubes?
  248. Opinions on Raysonic sp-200 + Raysonic 168 CD
  249. Lab power supply for testing tubes
  250. Could really use some help here!

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