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  1. Perished insulation on transformer secondary - seems shorted. What can I do here?
  2. Need advice and help with new build
  3. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  4. Determining imput impedence of a preamp line stage
  5. Newb question on 12AU7 gain stage
  6. Valve Preamplifier Help
  7. OPT choices - 6L6 PPP
  8. MESA STRATEGY 400
  9. Shuguang, Beijing or Shanghai EL84 ?
  10. CJ PV-5 tubes
  11. Reference tube amp kit, <20 watts for under $1,000?
  12. ccs power supply 310a
  13. At what point does it become a "hybrid" ?
  14. Line filters
  15. Step-up MC transformer for Audio Research SP 6C
  16. Psud help.
  17. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  18. Repurposing heathkit s-2 electronic switch
  19. output cap bypass?
  20. 6e5p & 6c41 tube amplifier
  21. Looking for my first tube amp...
  22. Acceptable variance in plate voltage?
  23. SRPP bias calculation
  24. 6A3 test, what am I doing wrong?
  25. Goldline Phono Tube Pre Amp PCB - Analog Metric
  26. New Copper Nanoparticle Solder - Breakthrough?
  27. SRPP as a final stage? What do you think?
  28. Troughline Transmissionline theory explanation needed
  29. Help with odd bias method on Crown tube amp
  30. preamp output impedance matching
  31. KT66 Woes
  32. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  33. Cascode driver
  34. 2a3 DC coupled
  35. ECF/PCF 200, 201 B10B 10Pin Tubes
  36. Homemade EL84 Push-Pull amp doesn't work
  37. Tamradio Transformer
  38. Variable HF oscilator
  39. eico st70 dimming house lights and slowing turntable`
  40. Amplifier Calculators
  41. Are any of these tubes useful for audio
  42. Modifying a J Sound Lab 2A3 amplifier
  43. Experimentation - Power transformer as output
  44. Mullard with ECC99 Phase Splitter
  45. Killed an Edcor OPT. How?
  46. Silvertone 1482 Fuse Troubleshooter help
  47. If it ain't broke....
  48. Silly DHT question VaMax
  49. Recommendations for preamps with PCC88
  50. 6h23n same as 6n23p
  51. Mighty Midget Amplifier and speaker requirements.
  52. Bias Supply protection
  53. Tube Amp Schematics
  54. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  55. 6sn7 driving Push Pull Parallel kt88's?
  56. help with an old Peak ST-100 - single ended 6GW8
  57. Designing an 801 SET Class A2 Amp
  58. Grid choke considerations for 300b
  59. SE poweramp with best bass performance
  60. 45 Tube IN SET Amp
  61. what will happen?
  62. ECL86 PP Amp - Very low frequency clicking
  63. motor run cap question
  64. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  65. EL34 SET With No Driver Tube?
  66. Filter capacitors - motor run?
  67. Microwave transformers
  68. Capacitors in the cathode of preamp tubes
  69. How Many Tubes to a Rackspace?
  70. selenium diodes
  71. Is it possible to Oversize an SE OPT?
  72. questions about my ecc83 phono pre build
  73. PSU resistor temperature
  74. QE08-200
  75. Adding heater transformer to my 6b4g amp. help a noob please.
  76. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  77. Big Cap in luxman MB3045
  78. Question about 4x12 cabinet wiring
  79. What happened to Sakuma-san's website ?
  80. Should I ???
  81. Can you classify condition of tubes?
  82. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  83. ecc99 preamp into an amp
  84. AI 500 Volume pot advice wanted.
  85. eico st70 input impedance question
  86. Tube Preamp or Power Amp?
  87. pmillett "Engineer's Amplifier" to mono?
  88. Advice/schematics wanted for HF-81 opt project
  89. 7591 tube, can't find that number on tester.
  90. valve upgrade
  91. has anyone known about Ming Da amplifiers
  92. A nice little valve amplifier
  93. Use rectifier winding for 6.3V DC heater?
  94. Voltage Regulators Zener / Gas Reg
  95. Looking for first tube amp kit.
  96. Which choke is better ?
  97. UK input voltage question
  98. 1sh29b
  99. 6G2 amp - volume and tone play up on one input only
  100. One channel grainy sound
  101. anybody know 6BY5 plate resistance ?
  102. SE 6550
  103. Yaqin MC-100b Volume pot
  104. Pair of possible MC step ups - octal mount
  105. My Mighty Midget
  106. Conrad Johnson MV75 "update circuit drawing"
  107. Cheap Red LED bias on ecc83/12ax7
  108. stoneAmp
  109. Project thread: KT88 PP amp
  110. I need the voltages or schematic for a Magnavox 177.55 amp
  111. Different PSE output designs - which to use?
  112. Toroidal (adding a winding)
  113. Kondo Souga - audition
  114. Electrocube Polyestyrene caps
  115. a incar tube/valve line driver
  116. Before I punch the holes.. A quartet of EL84?
  117. Tubes Home Theater 4+1
  118. DAC direct out, not enough gain, help me build a driving stage.
  119. ultra linear aikido with linearizing pentode
  120. Scott 299
  121. OPTs With Multiple Secondaries
  122. Over Four Tons Of Tubes
  123. L channel lower output?
  124. 16LS Amp by S5 Electronics Questions
  125. Heathkit WM-5
  126. 6BL8 not on roll chart
  127. CJ PV-5 PS rebuild
  128. Attenuator for passive pre (LEAK ST 20)
  129. Help ID tubes Plz
  130. Data sheet and load line question
  131. Trouble with Silver to Black face twin mod.
  132. Grommes S35 booster amp output?
  133. dc filament heater - high impedance const. voltage
  134. Schematic for Modwright SWL 9.0se Preamp
  135. GZ37 substitutes
  136. output attenuation
  137. My humming home made tube amp
  138. Shared Cathodes 300b
  139. Bogen CHB-35 for Music...
  140. correctly connecting PT for 110/220 volts
  141. voltage divider
  142. "Bypass caps" and their effect on perceived sound
  143. Repair of Cayin HA-2 Tube Headphone Amp
  144. Best Drive for EL34
  145. Needing Schematic for Grommes LJ7 please.
  146. 6550C v. KT88
  147. ECC81 MU-Follower consumption
  148. Locating hum source
  149. c3g self oscillation problem - a newbie needs help!
  150. Voice of music console help
  151. One tube radio
  152. Triodes with better "look&feel"
  153. HV Supply
  154. Will this arrangement impact the input impedence of the cathode follower?
  155. Measuring preamp output impedance
  156. Capacitor from 120VAC to ground
  157. I have power but no sound???
  158. Using a function generator with a tube amp?
  159. What resistors to use on KT88s tubes?
  160. Opinions on Raysonic sp-200 + Raysonic 168 CD
  161. Lab power supply for testing tubes
  162. Could really use some help here!
  163. Help~ GU50 ?
  164. Some Power Supply Help
  165. newbies beware of lampizator srpp pdf
  166. Headphone output
  167. Has anyone played around with this as an amp front end?
  168. Help for Dynavox VR-70E
  169. Heathkit TT-1 (testing a 199, 99 tube)
  170. Tube And Transformer I/V Converter For Differential Current DAC
  171. Volume increases as amp warms up
  172. New 6V6 Build - Suggestions Needed
  173. Tubes Numbers
  174. VTL
  175. Visit to KR audio Prague 20120921
  176. Where did he posted it?
  177. Problems with PT325.2i
  178. What phono preamp with Dynaco MKIII
  179. opinions on supporting a past sale/trade deal
  180. Series connection of regulator tubes
  181. Preamp buzzes when volume is at zero?
  182. Hrrrrmphhhff. PSU design error and how to cope with it
  183. 300B fixed bias specs
  184. Battery filament for 4P1L
  185. Need pro help with this tube amp.
  186. Guitar Amps Output Transformer specs
  187. Need help with UTC transformer
  188. Very interesting 300b design
  189. How to understand the power output in this case?
  190. K12G Help
  191. all dht se PX4
  192. multiple output transformers per channel
  193. What would you change in this schematic? (PP amp)
  194. Anyone know where to get this type of breadboard?
  195. moscode 600 tube recommendations
  196. Should I use two separate OPTs for parallel output tubes?
  197. custom Tube chassis vendor
  198. VLS631 Thermal Delay
  199. 6au6 preamp stage
  200. Recognize this tubes...
  201. need help for my new amp: 6G6G driver & 807 SE
  202. Anyone heard of radiometal for transformer core?
  203. BCF-2
  204. Glowing Plates of Doom
  205. Modding Aikido to non-Aikido such as SRPP?
  206. DN2540 plate load.
  207. Help! Did my power cable blow his tubes?
  208. 211 amp SRPP driver
  209. Tubelab SE problem
  210. tube to replace opamps in cd player
  211. Jolida 302b started to crack/pop once a minute
  212. why it doesn't work - 300B SE power amp
  213. Trio KW-70 schematic also known as WX-400 under kenwood name
  214. New DC to AC to high voltage AC idea?
  215. LED bias for 6N1P driver
  216. DIY tube amp general inquiry
  217. 6as7 Aikido headphone amplifier
  218. Cold tubes in warm amp = smoke?
  219. Keroes: Direct-Coupled amplifier
  220. Tube ID help please.
  221. exactly HOW does a tube amp work? or a vacuum tube?
  222. David Berning's zh-230 - whats going on here?
  223. EICO HF86 scratch build question please
  224. what to do with a 12W 600ohm to 4/8 ohm output transformer?
  225. Telewatt VS71M
  226. Yamamoto 09S 300B SE Amp Problem
  227. Marantz-9
  228. 6V6 amp question
  229. Wood chassis
  230. My first project SE(T) into high end audio.
  231. Supermalloy for the Power transformer?
  232. Can I build a screen reg. with IXYS 10M45?
  233. Modified DynacoMkIV
  234. Refurbising Conrad Johnson Premier One
  235. Would using a 16ohm speaker damage my SE output transformers?
  236. Grommes/PE S-35 questions
  237. Concertina phase inverter with LED bias - is this completely wrong?
  238. Parafeed turn-on delay
  239. I'm looking for 6an8 (as V1) schematics
  240. New Project - EL84 PP and preamp - suggestions welcome
  241. The sound of modern transformers compared with vintage gear
  242. Determining the core cross sectional area, Afe, for SE OPT
  243. HT power supply high?
  244. under-run push pull
  245. 12B4 Linestage Woes
  246. Transcendent Sound Mini-Beast
  247. A Question About Positive Feedback
  248. Help with opera consonance M100plus
  249. Just received 2x PT Choke OT. best implementation ?
  250. Just received 2x PT Choke OT. best implementation ?

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