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  1. OPT choices - 6L6 PPP
  2. MESA STRATEGY 400
  3. Shuguang, Beijing or Shanghai EL84 ?
  4. CJ PV-5 tubes
  5. Reference tube amp kit, <20 watts for under $1,000?
  6. ccs power supply 310a
  7. At what point does it become a "hybrid" ?
  8. Line filters
  9. Step-up MC transformer for Audio Research SP 6C
  10. Psud help.
  11. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  12. Repurposing heathkit s-2 electronic switch
  13. output cap bypass?
  14. 6e5p & 6c41 tube amplifier
  15. Looking for my first tube amp...
  16. Acceptable variance in plate voltage?
  17. SRPP bias calculation
  18. 6A3 test, what am I doing wrong?
  19. Goldline Phono Tube Pre Amp PCB - Analog Metric
  20. New Copper Nanoparticle Solder - Breakthrough?
  21. SRPP as a final stage? What do you think?
  22. Troughline Transmissionline theory explanation needed
  23. Help with odd bias method on Crown tube amp
  24. preamp output impedance matching
  25. KT66 Woes
  26. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  27. Cascode driver
  28. 2a3 DC coupled
  29. ECF/PCF 200, 201 B10B 10Pin Tubes
  30. Homemade EL84 Push-Pull amp doesn't work
  31. Tamradio Transformer
  32. Variable HF oscilator
  33. eico st70 dimming house lights and slowing turntable`
  34. Amplifier Calculators
  35. Are any of these tubes useful for audio
  36. Modifying a J Sound Lab 2A3 amplifier
  37. Experimentation - Power transformer as output
  38. Mullard with ECC99 Phase Splitter
  39. Killed an Edcor OPT. How?
  40. Silvertone 1482 Fuse Troubleshooter help
  41. If it ain't broke....
  42. Silly DHT question VaMax
  43. Recommendations for preamps with PCC88
  44. 6h23n same as 6n23p
  45. Mighty Midget Amplifier and speaker requirements.
  46. Bias Supply protection
  47. Tube Amp Schematics
  48. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  49. 6sn7 driving Push Pull Parallel kt88's?
  50. help with an old Peak ST-100 - single ended 6GW8
  51. Designing an 801 SET Class A2 Amp
  52. Grid choke considerations for 300b
  53. SE poweramp with best bass performance
  54. 45 Tube IN SET Amp
  55. what will happen?
  56. ECL86 PP Amp - Very low frequency clicking
  57. motor run cap question
  58. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  59. EL34 SET With No Driver Tube?
  60. Filter capacitors - motor run?
  61. Microwave transformers
  62. Capacitors in the cathode of preamp tubes
  63. How Many Tubes to a Rackspace?
  64. selenium diodes
  65. Is it possible to Oversize an SE OPT?
  66. questions about my ecc83 phono pre build
  67. PSU resistor temperature
  68. QE08-200
  69. Adding heater transformer to my 6b4g amp. help a noob please.
  70. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  71. Big Cap in luxman MB3045
  72. Question about 4x12 cabinet wiring
  73. What happened to Sakuma-san's website ?
  74. Should I ???
  75. Can you classify condition of tubes?
  76. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  77. ecc99 preamp into an amp
  78. AI 500 Volume pot advice wanted.
  79. eico st70 input impedance question
  80. Tube Preamp or Power Amp?
  81. pmillett "Engineer's Amplifier" to mono?
  82. Advice/schematics wanted for HF-81 opt project
  83. 7591 tube, can't find that number on tester.
  84. valve upgrade
  85. has anyone known about Ming Da amplifiers
  86. A nice little valve amplifier
  87. Use rectifier winding for 6.3V DC heater?
  88. Voltage Regulators Zener / Gas Reg
  89. Looking for first tube amp kit.
  90. Which choke is better ?
  91. UK input voltage question
  92. 1sh29b
  93. 6G2 amp - volume and tone play up on one input only
  94. One channel grainy sound
  95. anybody know 6BY5 plate resistance ?
  96. SE 6550
  97. Yaqin MC-100b Volume pot
  98. Pair of possible MC step ups - octal mount
  99. My Mighty Midget
  100. Conrad Johnson MV75 "update circuit drawing"
  101. Cheap Red LED bias on ecc83/12ax7
  102. stoneAmp
  103. Project thread: KT88 PP amp
  104. I need the voltages or schematic for a Magnavox 177.55 amp
  105. Different PSE output designs - which to use?
  106. Toroidal (adding a winding)
  107. Kondo Souga - audition
  108. Electrocube Polyestyrene caps
  109. a incar tube/valve line driver
  110. Before I punch the holes.. A quartet of EL84?
  111. Tubes Home Theater 4+1
  112. DAC direct out, not enough gain, help me build a driving stage.
  113. ultra linear aikido with linearizing pentode
  114. Scott 299
  115. OPTs With Multiple Secondaries
  116. Over Four Tons Of Tubes
  117. L channel lower output?
  118. 16LS Amp by S5 Electronics Questions
  119. Heathkit WM-5
  120. 6BL8 not on roll chart
  121. CJ PV-5 PS rebuild
  122. Attenuator for passive pre (LEAK ST 20)
  123. Help ID tubes Plz
  124. Data sheet and load line question
  125. Trouble with Silver to Black face twin mod.
  126. Grommes S35 booster amp output?
  127. dc filament heater - high impedance const. voltage
  128. Schematic for Modwright SWL 9.0se Preamp
  129. GZ37 substitutes
  130. output attenuation
  131. My humming home made tube amp
  132. Shared Cathodes 300b
  133. Bogen CHB-35 for Music...
  134. correctly connecting PT for 110/220 volts
  135. voltage divider
  136. "Bypass caps" and their effect on perceived sound
  137. Repair of Cayin HA-2 Tube Headphone Amp
  138. Best Drive for EL34
  139. Needing Schematic for Grommes LJ7 please.
  140. 6550C v. KT88
  141. ECC81 MU-Follower consumption
  142. Locating hum source
  143. c3g self oscillation problem - a newbie needs help!
  144. Voice of music console help
  145. One tube radio
  146. Triodes with better "look&feel"
  147. HV Supply
  148. Will this arrangement impact the input impedence of the cathode follower?
  149. Measuring preamp output impedance
  150. Capacitor from 120VAC to ground
  151. I have power but no sound???
  152. Using a function generator with a tube amp?
  153. What resistors to use on KT88s tubes?
  154. Opinions on Raysonic sp-200 + Raysonic 168 CD
  155. Lab power supply for testing tubes
  156. Could really use some help here!
  157. Help~ GU50 ?
  158. Some Power Supply Help
  159. newbies beware of lampizator srpp pdf
  160. Headphone output
  161. Has anyone played around with this as an amp front end?
  162. Help for Dynavox VR-70E
  163. Heathkit TT-1 (testing a 199, 99 tube)
  164. Tube And Transformer I/V Converter For Differential Current DAC
  165. Volume increases as amp warms up
  166. New 6V6 Build - Suggestions Needed
  167. Tubes Numbers
  168. VTL
  169. Visit to KR audio Prague 20120921
  170. Where did he posted it?
  171. Problems with PT325.2i
  172. What phono preamp with Dynaco MKIII
  173. opinions on supporting a past sale/trade deal
  174. Series connection of regulator tubes
  175. Preamp buzzes when volume is at zero?
  176. Hrrrrmphhhff. PSU design error and how to cope with it
  177. 300B fixed bias specs
  178. Battery filament for 4P1L
  179. Need pro help with this tube amp.
  180. Guitar Amps Output Transformer specs
  181. Need help with UTC transformer
  182. Very interesting 300b design
  183. How to understand the power output in this case?
  184. K12G Help
  185. all dht se PX4
  186. multiple output transformers per channel
  187. What would you change in this schematic? (PP amp)
  188. Anyone know where to get this type of breadboard?
  189. moscode 600 tube recommendations
  190. Should I use two separate OPTs for parallel output tubes?
  191. custom Tube chassis vendor
  192. VLS631 Thermal Delay
  193. 6au6 preamp stage
  194. Recognize this tubes...
  195. need help for my new amp: 6G6G driver & 807 SE
  196. Anyone heard of radiometal for transformer core?
  197. BCF-2
  198. Glowing Plates of Doom
  199. Modding Aikido to non-Aikido such as SRPP?
  200. DN2540 plate load.
  201. Help! Did my power cable blow his tubes?
  202. 211 amp SRPP driver
  203. Tubelab SE problem
  204. tube to replace opamps in cd player
  205. Jolida 302b started to crack/pop once a minute
  206. why it doesn't work - 300B SE power amp
  207. Trio KW-70 schematic also known as WX-400 under kenwood name
  208. New DC to AC to high voltage AC idea?
  209. LED bias for 6N1P driver
  210. DIY tube amp general inquiry
  211. 6as7 Aikido headphone amplifier
  212. Cold tubes in warm amp = smoke?
  213. Keroes: Direct-Coupled amplifier
  214. Tube ID help please.
  215. exactly HOW does a tube amp work? or a vacuum tube?
  216. David Berning's zh-230 - whats going on here?
  217. EICO HF86 scratch build question please
  218. what to do with a 12W 600ohm to 4/8 ohm output transformer?
  219. Telewatt VS71M
  220. Yamamoto 09S 300B SE Amp Problem
  221. Marantz-9
  222. 6V6 amp question
  223. Wood chassis
  224. My first project SE(T) into high end audio.
  225. Supermalloy for the Power transformer?
  226. Can I build a screen reg. with IXYS 10M45?
  227. Modified DynacoMkIV
  228. Refurbising Conrad Johnson Premier One
  229. Would using a 16ohm speaker damage my SE output transformers?
  230. Grommes/PE S-35 questions
  231. Concertina phase inverter with LED bias - is this completely wrong?
  232. Parafeed turn-on delay
  233. I'm looking for 6an8 (as V1) schematics
  234. New Project - EL84 PP and preamp - suggestions welcome
  235. The sound of modern transformers compared with vintage gear
  236. Determining the core cross sectional area, Afe, for SE OPT
  237. HT power supply high?
  238. under-run push pull
  239. 12B4 Linestage Woes
  240. Transcendent Sound Mini-Beast
  241. A Question About Positive Feedback
  242. Help with opera consonance M100plus
  243. Just received 2x PT Choke OT. best implementation ?
  244. Just received 2x PT Choke OT. best implementation ?
  245. Mystery Valve ID
  246. Oddball OT with extra secondary winding
  247. Help with Multi Section Can Cap replacement
  248. 600V bench variable supply to test transmitting valves
  249. Heater-cathode voltage spec interpretation
  250. Tell me why this wont work.

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