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  1. IT in cathode for driver class A2 tube
  2. Bogen MX30 Output Transformers
  3. Worlds Most Expensive Tube Amp !!!
  4. Blown screen resistor
  5. Blown screen resistor
  6. To ground plane or not?
  7. 5Z4PA Alternative?
  8. Question about chassis ground
  9. 6337- wtf is it?
  10. need ideers for a 6 channel amp
  11. sv572 transformer headache
  12. 6C33C / 6EM7
  13. 6146 TUBES ?
  14. Impedance matching
  15. QRP03 - Tube Buffered Gainclone
  16. Amp Cage Fababricators?
  17. PP KT88, Need help!
  18. Question regarding rectifier tube replacement
  19. Harmon Kardon A500
  20. Double triode 6SN7
  21. Tank's DIY tube preamp
  22. C core OPT for PP EL84
  23. amp diagram for KT88 and 300B on the same circuit
  24. Yaqin MS 34 D
  25. Tube buffer for amplifier with LM1875
  26. What is the best ?
  27. Fender DRRI tone
  28. DUKANE tube PA help
  29. Old tube? HELP RSE NP-7V-12 168810
  30. My first tube power amp
  31. Another mystery tube:
  32. Quad 22 Wiring
  33. Radford phase splitter again
  34. hookup wire source
  35. MCU adjustable fixed bias
  36. vr tube / glow tube as filter?
  37. Using phono stage only of preamp
  38. Correct settings for EBL21 and other tube on Hickok 539C
  39. Decca Portable Record Player model DPS8 Filter cap replacment
  40. 6V6 vs EL84 for output
  41. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  42. 2A3 with 12AT7
  43. Voltage rating of plate gyrator MOSFET
  44. Quad22 like preamplifier kit
  45. Push-pull implemented with KT88
  46. My QUAD 2 Restoration
  47. DIY High Power Car Tube Amp
  48. Perished insulation on transformer secondary - seems shorted. What can I do here?
  49. Need advice and help with new build
  50. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  51. Determining imput impedence of a preamp line stage
  52. Newb question on 12AU7 gain stage
  53. Valve Preamplifier Help
  54. OPT choices - 6L6 PPP
  55. MESA STRATEGY 400
  56. Shuguang, Beijing or Shanghai EL84 ?
  57. CJ PV-5 tubes
  58. Reference tube amp kit, <20 watts for under $1,000?
  59. ccs power supply 310a
  60. At what point does it become a "hybrid" ?
  61. Line filters
  62. Step-up MC transformer for Audio Research SP 6C
  63. Psud help.
  64. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  65. Repurposing heathkit s-2 electronic switch
  66. output cap bypass?
  67. 6e5p & 6c41 tube amplifier
  68. Looking for my first tube amp...
  69. Acceptable variance in plate voltage?
  70. SRPP bias calculation
  71. 6A3 test, what am I doing wrong?
  72. Goldline Phono Tube Pre Amp PCB - Analog Metric
  73. New Copper Nanoparticle Solder - Breakthrough?
  74. SRPP as a final stage? What do you think?
  75. Troughline Transmissionline theory explanation needed
  76. Help with odd bias method on Crown tube amp
  77. preamp output impedance matching
  78. KT66 Woes
  79. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  80. Cascode driver
  81. 2a3 DC coupled
  82. ECF/PCF 200, 201 B10B 10Pin Tubes
  83. Homemade EL84 Push-Pull amp doesn't work
  84. Tamradio Transformer
  85. Variable HF oscilator
  86. eico st70 dimming house lights and slowing turntable`
  87. Amplifier Calculators
  88. Are any of these tubes useful for audio
  89. Modifying a J Sound Lab 2A3 amplifier
  90. Experimentation - Power transformer as output
  91. Mullard with ECC99 Phase Splitter
  92. Killed an Edcor OPT. How?
  93. Silvertone 1482 Fuse Troubleshooter help
  94. If it ain't broke....
  95. Silly DHT question VaMax
  96. Recommendations for preamps with PCC88
  97. 6h23n same as 6n23p
  98. Mighty Midget Amplifier and speaker requirements.
  99. Bias Supply protection
  100. Tube Amp Schematics
  101. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  102. 6sn7 driving Push Pull Parallel kt88's?
  103. help with an old Peak ST-100 - single ended 6GW8
  104. Designing an 801 SET Class A2 Amp
  105. Grid choke considerations for 300b
  106. SE poweramp with best bass performance
  107. 45 Tube IN SET Amp
  108. what will happen?
  109. ECL86 PP Amp - Very low frequency clicking
  110. motor run cap question
  111. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  112. EL34 SET With No Driver Tube?
  113. Filter capacitors - motor run?
  114. Microwave transformers
  115. Capacitors in the cathode of preamp tubes
  116. How Many Tubes to a Rackspace?
  117. selenium diodes
  118. Is it possible to Oversize an SE OPT?
  119. questions about my ecc83 phono pre build
  120. PSU resistor temperature
  121. QE08-200
  122. Adding heater transformer to my 6b4g amp. help a noob please.
  123. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  124. Big Cap in luxman MB3045
  125. Question about 4x12 cabinet wiring
  126. What happened to Sakuma-san's website ?
  127. Should I ???
  128. Can you classify condition of tubes?
  129. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  130. ecc99 preamp into an amp
  131. AI 500 Volume pot advice wanted.
  132. eico st70 input impedance question
  133. Tube Preamp or Power Amp?
  134. pmillett "Engineer's Amplifier" to mono?
  135. Advice/schematics wanted for HF-81 opt project
  136. 7591 tube, can't find that number on tester.
  137. valve upgrade
  138. has anyone known about Ming Da amplifiers
  139. A nice little valve amplifier
  140. Use rectifier winding for 6.3V DC heater?
  141. Voltage Regulators Zener / Gas Reg
  142. Looking for first tube amp kit.
  143. Which choke is better ?
  144. UK input voltage question
  145. 1sh29b
  146. 6G2 amp - volume and tone play up on one input only
  147. One channel grainy sound
  148. anybody know 6BY5 plate resistance ?
  149. SE 6550
  150. Yaqin MC-100b Volume pot
  151. Pair of possible MC step ups - octal mount
  152. My Mighty Midget
  153. Conrad Johnson MV75 "update circuit drawing"
  154. Cheap Red LED bias on ecc83/12ax7
  155. stoneAmp
  156. Project thread: KT88 PP amp
  157. I need the voltages or schematic for a Magnavox 177.55 amp
  158. Different PSE output designs - which to use?
  159. Toroidal (adding a winding)
  160. Kondo Souga - audition
  161. Electrocube Polyestyrene caps
  162. a incar tube/valve line driver
  163. Before I punch the holes.. A quartet of EL84?
  164. Tubes Home Theater 4+1
  165. DAC direct out, not enough gain, help me build a driving stage.
  166. ultra linear aikido with linearizing pentode
  167. Scott 299
  168. OPTs With Multiple Secondaries
  169. Over Four Tons Of Tubes
  170. L channel lower output?
  171. 16LS Amp by S5 Electronics Questions
  172. Heathkit WM-5
  173. 6BL8 not on roll chart
  174. CJ PV-5 PS rebuild
  175. Attenuator for passive pre (LEAK ST 20)
  176. Help ID tubes Plz
  177. Data sheet and load line question
  178. Trouble with Silver to Black face twin mod.
  179. Grommes S35 booster amp output?
  180. dc filament heater - high impedance const. voltage
  181. Schematic for Modwright SWL 9.0se Preamp
  182. GZ37 substitutes
  183. output attenuation
  184. My humming home made tube amp
  185. Shared Cathodes 300b
  186. Bogen CHB-35 for Music...
  187. correctly connecting PT for 110/220 volts
  188. voltage divider
  189. "Bypass caps" and their effect on perceived sound
  190. Repair of Cayin HA-2 Tube Headphone Amp
  191. Best Drive for EL34
  192. Needing Schematic for Grommes LJ7 please.
  193. 6550C v. KT88
  194. ECC81 MU-Follower consumption
  195. Locating hum source
  196. c3g self oscillation problem - a newbie needs help!
  197. Voice of music console help
  198. One tube radio
  199. Triodes with better "look&feel"
  200. HV Supply
  201. Will this arrangement impact the input impedence of the cathode follower?
  202. Measuring preamp output impedance
  203. Capacitor from 120VAC to ground
  204. I have power but no sound???
  205. Using a function generator with a tube amp?
  206. What resistors to use on KT88s tubes?
  207. Opinions on Raysonic sp-200 + Raysonic 168 CD
  208. Lab power supply for testing tubes
  209. Could really use some help here!
  210. Help~ GU50 ?
  211. Some Power Supply Help
  212. newbies beware of lampizator srpp pdf
  213. Headphone output
  214. Has anyone played around with this as an amp front end?
  215. Help for Dynavox VR-70E
  216. Heathkit TT-1 (testing a 199, 99 tube)
  217. Tube And Transformer I/V Converter For Differential Current DAC
  218. Volume increases as amp warms up
  219. New 6V6 Build - Suggestions Needed
  220. Tubes Numbers
  221. VTL
  222. Visit to KR audio Prague 20120921
  223. Where did he posted it?
  224. Problems with PT325.2i
  225. What phono preamp with Dynaco MKIII
  226. opinions on supporting a past sale/trade deal
  227. Series connection of regulator tubes
  228. Preamp buzzes when volume is at zero?
  229. Hrrrrmphhhff. PSU design error and how to cope with it
  230. 300B fixed bias specs
  231. Battery filament for 4P1L
  232. Need pro help with this tube amp.
  233. Guitar Amps Output Transformer specs
  234. Need help with UTC transformer
  235. Very interesting 300b design
  236. How to understand the power output in this case?
  237. K12G Help
  238. all dht se PX4
  239. multiple output transformers per channel
  240. What would you change in this schematic? (PP amp)
  241. Anyone know where to get this type of breadboard?
  242. moscode 600 tube recommendations
  243. Should I use two separate OPTs for parallel output tubes?
  244. custom Tube chassis vendor
  245. VLS631 Thermal Delay
  246. 6au6 preamp stage
  247. Recognize this tubes...
  248. need help for my new amp: 6G6G driver & 807 SE
  249. Anyone heard of radiometal for transformer core?
  250. BCF-2

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