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  1. C core OPT for PP EL84
  2. amp diagram for KT88 and 300B on the same circuit
  3. Yaqin MS 34 D
  4. Tube buffer for amplifier with LM1875
  5. What is the best ?
  6. DUKANE tube PA help
  7. Old tube? HELP RSE NP-7V-12 168810
  8. My first tube power amp
  9. Another mystery tube:
  10. Quad 22 Wiring
  11. Radford phase splitter again
  12. hookup wire source
  13. MCU adjustable fixed bias
  14. vr tube / glow tube as filter?
  15. Using phono stage only of preamp
  16. Correct settings for EBL21 and other tube on Hickok 539C
  17. Decca Portable Record Player model DPS8 Filter cap replacment
  18. 6V6 vs EL84 for output
  19. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  20. 2A3 with 12AT7
  21. Voltage rating of plate gyrator MOSFET
  22. Quad22 like preamplifier kit
  23. Push-pull implemented with KT88
  24. My QUAD 2 Restoration
  25. DIY High Power Car Tube Amp
  26. Perished insulation on transformer secondary - seems shorted. What can I do here?
  27. Need advice and help with new build
  28. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  29. Determining imput impedence of a preamp line stage
  30. Newb question on 12AU7 gain stage
  31. Valve Preamplifier Help
  32. OPT choices - 6L6 PPP
  33. MESA STRATEGY 400
  34. Shuguang, Beijing or Shanghai EL84 ?
  35. CJ PV-5 tubes
  36. Reference tube amp kit, <20 watts for under $1,000?
  37. ccs power supply 310a
  38. At what point does it become a "hybrid" ?
  39. Line filters
  40. Step-up MC transformer for Audio Research SP 6C
  41. Psud help.
  42. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  43. Repurposing heathkit s-2 electronic switch
  44. output cap bypass?
  45. 6e5p & 6c41 tube amplifier
  46. Looking for my first tube amp...
  47. Acceptable variance in plate voltage?
  48. SRPP bias calculation
  49. 6A3 test, what am I doing wrong?
  50. Goldline Phono Tube Pre Amp PCB - Analog Metric
  51. New Copper Nanoparticle Solder - Breakthrough?
  52. SRPP as a final stage? What do you think?
  53. Troughline Transmissionline theory explanation needed
  54. Help with odd bias method on Crown tube amp
  55. preamp output impedance matching
  56. KT66 Woes
  57. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  58. Cascode driver
  59. 2a3 DC coupled
  60. ECF/PCF 200, 201 B10B 10Pin Tubes
  61. Homemade EL84 Push-Pull amp doesn't work
  62. Tamradio Transformer
  63. Variable HF oscilator
  64. eico st70 dimming house lights and slowing turntable`
  65. Amplifier Calculators
  66. Are any of these tubes useful for audio
  67. Modifying a J Sound Lab 2A3 amplifier
  68. Experimentation - Power transformer as output
  69. Mullard with ECC99 Phase Splitter
  70. Killed an Edcor OPT. How?
  71. If it ain't broke....
  72. Silly DHT question VaMax
  73. Recommendations for preamps with PCC88
  74. 6h23n same as 6n23p
  75. Mighty Midget Amplifier and speaker requirements.
  76. Bias Supply protection
  77. Tube Amp Schematics
  78. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  79. 6sn7 driving Push Pull Parallel kt88's?
  80. help with an old Peak ST-100 - single ended 6GW8
  81. Designing an 801 SET Class A2 Amp
  82. Grid choke considerations for 300b
  83. SE poweramp with best bass performance
  84. 45 Tube IN SET Amp
  85. what will happen?
  86. ECL86 PP Amp - Very low frequency clicking
  87. motor run cap question
  88. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  89. EL34 SET With No Driver Tube?
  90. Filter capacitors - motor run?
  91. Microwave transformers
  92. Capacitors in the cathode of preamp tubes
  93. How Many Tubes to a Rackspace?
  94. selenium diodes
  95. Is it possible to Oversize an SE OPT?
  96. questions about my ecc83 phono pre build
  97. PSU resistor temperature
  98. QE08-200
  99. Adding heater transformer to my 6b4g amp. help a noob please.
  100. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  101. Big Cap in luxman MB3045
  102. Question about 4x12 cabinet wiring
  103. What happened to Sakuma-san's website ?
  104. Should I ???
  105. Can you classify condition of tubes?
  106. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  107. ecc99 preamp into an amp
  108. AI 500 Volume pot advice wanted.
  109. eico st70 input impedance question
  110. Tube Preamp or Power Amp?
  111. pmillett "Engineer's Amplifier" to mono?
  112. Advice/schematics wanted for HF-81 opt project
  113. 7591 tube, can't find that number on tester.
  114. valve upgrade
  115. has anyone known about Ming Da amplifiers
  116. A nice little valve amplifier
  117. Use rectifier winding for 6.3V DC heater?
  118. Voltage Regulators Zener / Gas Reg
  119. Looking for first tube amp kit.
  120. Which choke is better ?
  121. UK input voltage question
  122. 1sh29b
  123. 6G2 amp - volume and tone play up on one input only
  124. One channel grainy sound
  125. anybody know 6BY5 plate resistance ?
  126. SE 6550
  127. Yaqin MC-100b Volume pot
  128. Pair of possible MC step ups - octal mount
  129. My Mighty Midget
  130. Conrad Johnson MV75 "update circuit drawing"
  131. Cheap Red LED bias on ecc83/12ax7
  132. stoneAmp
  133. Project thread: KT88 PP amp
  134. I need the voltages or schematic for a Magnavox 177.55 amp
  135. Different PSE output designs - which to use?
  136. Toroidal (adding a winding)
  137. Kondo Souga - audition
  138. Electrocube Polyestyrene caps
  139. a incar tube/valve line driver
  140. Before I punch the holes.. A quartet of EL84?
  141. Tubes Home Theater 4+1
  142. DAC direct out, not enough gain, help me build a driving stage.
  143. ultra linear aikido with linearizing pentode
  144. Scott 299
  145. OPTs With Multiple Secondaries
  146. Over Four Tons Of Tubes
  147. L channel lower output?
  148. 16LS Amp by S5 Electronics Questions
  149. Heathkit WM-5
  150. 6BL8 not on roll chart
  151. CJ PV-5 PS rebuild
  152. Attenuator for passive pre (LEAK ST 20)
  153. Help ID tubes Plz
  154. Data sheet and load line question
  155. Trouble with Silver to Black face twin mod.
  156. Grommes S35 booster amp output?
  157. dc filament heater - high impedance const. voltage
  158. Schematic for Modwright SWL 9.0se Preamp
  159. GZ37 substitutes
  160. output attenuation
  161. My humming home made tube amp
  162. Shared Cathodes 300b
  163. Bogen CHB-35 for Music...
  164. correctly connecting PT for 110/220 volts
  165. voltage divider
  166. "Bypass caps" and their effect on perceived sound
  167. Repair of Cayin HA-2 Tube Headphone Amp
  168. Best Drive for EL34
  169. Needing Schematic for Grommes LJ7 please.
  170. 6550C v. KT88
  171. ECC81 MU-Follower consumption
  172. Locating hum source
  173. c3g self oscillation problem - a newbie needs help!
  174. Voice of music console help
  175. One tube radio
  176. Triodes with better "look&feel"
  177. HV Supply
  178. Will this arrangement impact the input impedence of the cathode follower?
  179. Measuring preamp output impedance
  180. Capacitor from 120VAC to ground
  181. I have power but no sound???
  182. Using a function generator with a tube amp?
  183. What resistors to use on KT88s tubes?
  184. Opinions on Raysonic sp-200 + Raysonic 168 CD
  185. Lab power supply for testing tubes
  186. Could really use some help here!
  187. Help~ GU50 ?
  188. Some Power Supply Help
  189. newbies beware of lampizator srpp pdf
  190. Headphone output
  191. Has anyone played around with this as an amp front end?
  192. Help for Dynavox VR-70E
  193. Heathkit TT-1 (testing a 199, 99 tube)
  194. Tube And Transformer I/V Converter For Differential Current DAC
  195. Volume increases as amp warms up
  196. New 6V6 Build - Suggestions Needed
  197. Tubes Numbers
  198. VTL
  199. Visit to KR audio Prague 20120921
  200. Where did he posted it?
  201. Problems with PT325.2i
  202. What phono preamp with Dynaco MKIII
  203. opinions on supporting a past sale/trade deal
  204. Series connection of regulator tubes
  205. Preamp buzzes when volume is at zero?
  206. Hrrrrmphhhff. PSU design error and how to cope with it
  207. 300B fixed bias specs
  208. Battery filament for 4P1L
  209. Need pro help with this tube amp.
  210. Need help with UTC transformer
  211. Very interesting 300b design
  212. How to understand the power output in this case?
  213. K12G Help
  214. all dht se PX4
  215. multiple output transformers per channel
  216. What would you change in this schematic? (PP amp)
  217. Anyone know where to get this type of breadboard?
  218. moscode 600 tube recommendations
  219. Should I use two separate OPTs for parallel output tubes?
  220. custom Tube chassis vendor
  221. VLS631 Thermal Delay
  222. 6au6 preamp stage
  223. Recognize this tubes...
  224. need help for my new amp: 6G6G driver & 807 SE
  225. Anyone heard of radiometal for transformer core?
  226. BCF-2
  227. Glowing Plates of Doom
  228. Modding Aikido to non-Aikido such as SRPP?
  229. DN2540 plate load.
  230. Help! Did my power cable blow his tubes?
  231. 211 amp SRPP driver
  232. Tubelab SE problem
  233. tube to replace opamps in cd player
  234. Jolida 302b started to crack/pop once a minute
  235. why it doesn't work - 300B SE power amp
  236. Trio KW-70 schematic also known as WX-400 under kenwood name
  237. New DC to AC to high voltage AC idea?
  238. LED bias for 6N1P driver
  239. DIY tube amp general inquiry
  240. 6as7 Aikido headphone amplifier
  241. Cold tubes in warm amp = smoke?
  242. Keroes: Direct-Coupled amplifier
  243. Tube ID help please.
  244. exactly HOW does a tube amp work? or a vacuum tube?
  245. David Berning's zh-230 - whats going on here?
  246. EICO HF86 scratch build question please
  247. what to do with a 12W 600ohm to 4/8 ohm output transformer?
  248. Telewatt VS71M
  249. Yamamoto 09S 300B SE Amp Problem
  250. Marantz-9

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