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  1. Do power transformers affect sound quality?
  2. Help with a Velleman K4040 ...
  3. RCA PA Amplifer, Input Transformers
  4. Channel imbalance Xiang Sheng DAC-01
  5. ARC M100s
  6. pros & cons of current mirror to balance a push-pull ?
  7. Wright Audio WLA10 help needed
  8. The Best tube/valve sound!?
  9. Mcintosh MC1000 and Ming Da MC300-PRE
  10. Operating Modern 845s
  11. The Transcendent Sound Son of Beast OTL Master/Mod Thread.
  12. Neutralizing An Amplifier
  13. Stacked speakers driven by an SEP amp?
  14. Tube buffer suggestion for LM4702 amplifier?
  15. FWB Voltage Doubler with -Bias supply
  16. 500V SE pentode design
  17. single ended transformer driving 32ohm speaker
  18. uC based Tube Curve Tracer Kit - Experts Opinion ?
  19. 250K Attenuator
  20. Possible to drive PP EL34-triodes with a cathodyne phase-splitter?
  21. Daughters POD amp 13EM7 Pics
  22. Calculating Ripple Current with PSUD2
  23. Channel problem on 45 converted amp
  24. Want to make a tube preamp
  25. Marantz TC-5 choke value
  26. diference between schematics and pcb layout
  27. Would this work?
  28. Can old resistors go bad?
  29. Strange output tube behaviour
  30. Practical question: toroidal transformer / heater current / kt120
  31. Morgan Jones Power supply cap values
  32. Can use a ballast for a PSU??
  33. Looking for a OTL tube headphone amp design
  34. Relative Humidity Attenuating HF
  35. Parallel Output transformer question
  36. Need help to ID a tube...
  37. Modifications to Sennheiser VKS 203
  38. Onix SP3 integrated amp latest schematic
  39. Omit sp3 integrated amp latest schematic
  40. Help: Western Electric 102A Tube Datasheet and Test Settings
  41. Power and output transformer separated from amplifier
  42. discrete and simple VCCS
  43. heater wiring question
  44. What is the deal with Welborne Labs?
  45. Center Channel
  46. input stage problem help please!
  47. Tube Tips/Tricks for beginners
  48. Any skilled custom tube amplifier builders out there?
  49. Are these tubes really matched?
  50. Single Ended Amp
  51. Mighty Midget Problems
  52. Run the tube stuff in your car
  53. Jackson 648 test for 6973
  54. Space-charge tetrodes in Inverted Mode
  55. choosing input valve
  56. Rectifier characteristics
  57. Glass-ware?
  58. 5751 Mil spec tubes vrs 12AX7
  59. 47 pentode...fabulous sound !!!!
  60. Aikido preamp transformer question
  61. 40's tube receiver question
  62. W5m transformer
  63. Dual voltage PS filtering.
  64. OD3 150V tube regulator
  65. Fisher 500c
  66. Help with quad cap upgrade
  67. low voltage hybrid power amplifier
  68. Morgan Jones Kapacitors
  69. Which IR LED?
  70. Tube Frequency Response
  71. Big B+ voltage drop using diode rectifier.
  72. Triode ST70 kit schematic?
  73. 6AU6 replacement
  74. IT in cathode for driver class A2 tube
  75. Bogen MX30 Output Transformers
  76. Worlds Most Expensive Tube Amp !!!
  77. Blown screen resistor
  78. Blown screen resistor
  79. To ground plane or not?
  80. 5Z4PA Alternative?
  81. Question about chassis ground
  82. 6337- wtf is it?
  83. need ideers for a 6 channel amp
  84. sv572 transformer headache
  85. 6C33C / 6EM7
  86. 6146 TUBES ?
  87. Impedance matching
  88. QRP03 - Tube Buffered Gainclone
  89. Amp Cage Fababricators?
  90. PP KT88, Need help!
  91. Question regarding rectifier tube replacement
  92. Harmon Kardon A500
  93. Double triode 6SN7
  94. Tank's DIY tube preamp
  95. C core OPT for PP EL84
  96. amp diagram for KT88 and 300B on the same circuit
  97. Yaqin MS 34 D
  98. Tube buffer for amplifier with LM1875
  99. What is the best ?
  100. DUKANE tube PA help
  101. Old tube? HELP RSE NP-7V-12 168810
  102. My first tube power amp
  103. Another mystery tube:
  104. Quad 22 Wiring
  105. Radford phase splitter again
  106. hookup wire source
  107. MCU adjustable fixed bias
  108. vr tube / glow tube as filter?
  109. Using phono stage only of preamp
  110. Correct settings for EBL21 and other tube on Hickok 539C
  111. Decca Portable Record Player model DPS8 Filter cap replacment
  112. 6V6 vs EL84 for output
  113. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  114. 2A3 with 12AT7
  115. Voltage rating of plate gyrator MOSFET
  116. Quad22 like preamplifier kit
  117. Push-pull implemented with KT88
  118. My QUAD 2 Restoration
  119. DIY High Power Car Tube Amp
  120. Perished insulation on transformer secondary - seems shorted. What can I do here?
  121. Need advice and help with new build
  122. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  123. Determining imput impedence of a preamp line stage
  124. Newb question on 12AU7 gain stage
  125. Valve Preamplifier Help
  126. OPT choices - 6L6 PPP
  127. MESA STRATEGY 400
  128. Shuguang, Beijing or Shanghai EL84 ?
  129. CJ PV-5 tubes
  130. Reference tube amp kit, <20 watts for under $1,000?
  131. ccs power supply 310a
  132. At what point does it become a "hybrid" ?
  133. Line filters
  134. Step-up MC transformer for Audio Research SP 6C
  135. Psud help.
  136. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  137. Repurposing heathkit s-2 electronic switch
  138. output cap bypass?
  139. 6e5p & 6c41 tube amplifier
  140. Looking for my first tube amp...
  141. Acceptable variance in plate voltage?
  142. SRPP bias calculation
  143. 6A3 test, what am I doing wrong?
  144. Goldline Phono Tube Pre Amp PCB - Analog Metric
  145. New Copper Nanoparticle Solder - Breakthrough?
  146. SRPP as a final stage? What do you think?
  147. Troughline Transmissionline theory explanation needed
  148. Help with odd bias method on Crown tube amp
  149. preamp output impedance matching
  150. KT66 Woes
  151. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  152. Cascode driver
  153. 2a3 DC coupled
  154. ECF/PCF 200, 201 B10B 10Pin Tubes
  155. Homemade EL84 Push-Pull amp doesn't work
  156. Tamradio Transformer
  157. Variable HF oscilator
  158. eico st70 dimming house lights and slowing turntable`
  159. Amplifier Calculators
  160. Are any of these tubes useful for audio
  161. Modifying a J Sound Lab 2A3 amplifier
  162. Experimentation - Power transformer as output
  163. Mullard with ECC99 Phase Splitter
  164. Killed an Edcor OPT. How?
  165. If it ain't broke....
  166. Silly DHT question VaMax
  167. Recommendations for preamps with PCC88
  168. 6h23n same as 6n23p
  169. Mighty Midget Amplifier and speaker requirements.
  170. Bias Supply protection
  171. Tube Amp Schematics
  172. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  173. 6sn7 driving Push Pull Parallel kt88's?
  174. help with an old Peak ST-100 - single ended 6GW8
  175. Designing an 801 SET Class A2 Amp
  176. Grid choke considerations for 300b
  177. SE poweramp with best bass performance
  178. 45 Tube IN SET Amp
  179. what will happen?
  180. ECL86 PP Amp - Very low frequency clicking
  181. motor run cap question
  182. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  183. EL34 SET With No Driver Tube?
  184. Filter capacitors - motor run?
  185. Microwave transformers
  186. Capacitors in the cathode of preamp tubes
  187. How Many Tubes to a Rackspace?
  188. selenium diodes
  189. Is it possible to Oversize an SE OPT?
  190. questions about my ecc83 phono pre build
  191. PSU resistor temperature
  192. QE08-200
  193. Adding heater transformer to my 6b4g amp. help a noob please.
  194. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  195. Big Cap in luxman MB3045
  196. Question about 4x12 cabinet wiring
  197. What happened to Sakuma-san's website ?
  198. Should I ???
  199. Can you classify condition of tubes?
  200. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  201. ecc99 preamp into an amp
  202. AI 500 Volume pot advice wanted.
  203. eico st70 input impedance question
  204. Tube Preamp or Power Amp?
  205. pmillett "Engineer's Amplifier" to mono?
  206. Advice/schematics wanted for HF-81 opt project
  207. 7591 tube, can't find that number on tester.
  208. valve upgrade
  209. has anyone known about Ming Da amplifiers
  210. A nice little valve amplifier
  211. Use rectifier winding for 6.3V DC heater?
  212. Voltage Regulators Zener / Gas Reg
  213. Looking for first tube amp kit.
  214. Which choke is better ?
  215. UK input voltage question
  216. 1sh29b
  217. 6G2 amp - volume and tone play up on one input only
  218. One channel grainy sound
  219. anybody know 6BY5 plate resistance ?
  220. SE 6550
  221. Yaqin MC-100b Volume pot
  222. Pair of possible MC step ups - octal mount
  223. My Mighty Midget
  224. Conrad Johnson MV75 "update circuit drawing"
  225. Cheap Red LED bias on ecc83/12ax7
  226. stoneAmp
  227. Project thread: KT88 PP amp
  228. I need the voltages or schematic for a Magnavox 177.55 amp
  229. Different PSE output designs - which to use?
  230. Toroidal (adding a winding)
  231. Kondo Souga - audition
  232. a incar tube/valve line driver
  233. Before I punch the holes.. A quartet of EL84?
  234. Tubes Home Theater 4+1
  235. DAC direct out, not enough gain, help me build a driving stage.
  236. ultra linear aikido with linearizing pentode
  237. Scott 299
  238. OPTs With Multiple Secondaries
  239. Over Four Tons Of Tubes
  240. L channel lower output?
  241. 16LS Amp by S5 Electronics Questions
  242. Heathkit WM-5
  243. 6BL8 not on roll chart
  244. CJ PV-5 PS rebuild
  245. Attenuator for passive pre (LEAK ST 20)
  246. Help ID tubes Plz
  247. Data sheet and load line question
  248. Trouble with Silver to Black face twin mod.
  249. Grommes S35 booster amp output?
  250. dc filament heater - high impedance const. voltage

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