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  1. 40's tube receiver question
  2. W5m transformer
  3. Dual voltage PS filtering.
  4. OD3 150V tube regulator
  5. Fisher 500c
  6. Help with quad cap upgrade
  7. low voltage hybrid power amplifier
  8. Morgan Jones Kapacitors
  9. Which IR LED?
  10. Tube Frequency Response
  11. Big B+ voltage drop using diode rectifier.
  12. Triode ST70 kit schematic?
  13. 6AU6 replacement
  14. IT in cathode for driver class A2 tube
  15. Bogen MX30 Output Transformers
  16. Worlds Most Expensive Tube Amp !!!
  17. Blown screen resistor
  18. Blown screen resistor
  19. To ground plane or not?
  20. 5Z4PA Alternative?
  21. Question about chassis ground
  22. 6337- wtf is it?
  23. need ideers for a 6 channel amp
  24. sv572 transformer headache
  25. 6C33C / 6EM7
  26. 6146 TUBES ?
  27. Impedance matching
  28. QRP03 - Tube Buffered Gainclone
  29. Amp Cage Fababricators?
  30. PP KT88, Need help!
  31. Question regarding rectifier tube replacement
  32. Harmon Kardon A500
  33. Double triode 6SN7
  34. Tank's DIY tube preamp
  35. C core OPT for PP EL84
  36. amp diagram for KT88 and 300B on the same circuit
  37. Yaqin MS 34 D
  38. Tube buffer for amplifier with LM1875
  39. What is the best ?
  40. DUKANE tube PA help
  41. Old tube? HELP RSE NP-7V-12 168810
  42. My first tube power amp
  43. Another mystery tube:
  44. Quad 22 Wiring
  45. Radford phase splitter again
  46. hookup wire source
  47. MCU adjustable fixed bias
  48. vr tube / glow tube as filter?
  49. Using phono stage only of preamp
  50. Correct settings for EBL21 and other tube on Hickok 539C
  51. Decca Portable Record Player model DPS8 Filter cap replacment
  52. 6V6 vs EL84 for output
  53. Realistic HK 210/Acrosound Stereo 120 Amp Schmatic/Manual Needed
  54. 2A3 with 12AT7
  55. Voltage rating of plate gyrator MOSFET
  56. Quad22 like preamplifier kit
  57. Push-pull implemented with KT88
  58. My QUAD 2 Restoration
  59. DIY High Power Car Tube Amp
  60. Perished insulation on transformer secondary - seems shorted. What can I do here?
  61. Need advice and help with new build
  62. Suggestions for a cheap Stereo Phono tube preamp based upon this power transformer?
  63. Determining imput impedence of a preamp line stage
  64. Newb question on 12AU7 gain stage
  65. Valve Preamplifier Help
  66. OPT choices - 6L6 PPP
  67. MESA STRATEGY 400
  68. Shuguang, Beijing or Shanghai EL84 ?
  69. CJ PV-5 tubes
  70. Reference tube amp kit, <20 watts for under $1,000?
  71. ccs power supply 310a
  72. At what point does it become a "hybrid" ?
  73. Line filters
  74. Step-up MC transformer for Audio Research SP 6C
  75. Psud help.
  76. MC Step-Up OTL Stage (grounded-grid) for MM RIAA Head Amps
  77. Repurposing heathkit s-2 electronic switch
  78. output cap bypass?
  79. 6e5p & 6c41 tube amplifier
  80. Looking for my first tube amp...
  81. Acceptable variance in plate voltage?
  82. SRPP bias calculation
  83. 6A3 test, what am I doing wrong?
  84. Goldline Phono Tube Pre Amp PCB - Analog Metric
  85. New Copper Nanoparticle Solder - Breakthrough?
  86. SRPP as a final stage? What do you think?
  87. Troughline Transmissionline theory explanation needed
  88. Help with odd bias method on Crown tube amp
  89. preamp output impedance matching
  90. KT66 Woes
  91. Help with Calibration: Hickok Western Electric KS-15750-L1 Tubes Tester
  92. Cascode driver
  93. 2a3 DC coupled
  94. ECF/PCF 200, 201 B10B 10Pin Tubes
  95. Homemade EL84 Push-Pull amp doesn't work
  96. Tamradio Transformer
  97. Variable HF oscilator
  98. eico st70 dimming house lights and slowing turntable`
  99. Amplifier Calculators
  100. Are any of these tubes useful for audio
  101. Modifying a J Sound Lab 2A3 amplifier
  102. Experimentation - Power transformer as output
  103. Mullard with ECC99 Phase Splitter
  104. Killed an Edcor OPT. How?
  105. If it ain't broke....
  106. Silly DHT question VaMax
  107. Recommendations for preamps with PCC88
  108. 6h23n same as 6n23p
  109. Mighty Midget Amplifier and speaker requirements.
  110. Bias Supply protection
  111. Tube Amp Schematics
  112. POWER TRANSFORMER IDENTIFICATION NEEDED "26R90"
  113. 6sn7 driving Push Pull Parallel kt88's?
  114. help with an old Peak ST-100 - single ended 6GW8
  115. Designing an 801 SET Class A2 Amp
  116. Grid choke considerations for 300b
  117. SE poweramp with best bass performance
  118. 45 Tube IN SET Amp
  119. what will happen?
  120. ECL86 PP Amp - Very low frequency clicking
  121. motor run cap question
  122. Power Switch/Indicator Lamp Mod to S-5 Electronics K-501
  123. EL34 SET With No Driver Tube?
  124. Filter capacitors - motor run?
  125. Microwave transformers
  126. Capacitors in the cathode of preamp tubes
  127. How Many Tubes to a Rackspace?
  128. selenium diodes
  129. Is it possible to Oversize an SE OPT?
  130. questions about my ecc83 phono pre build
  131. PSU resistor temperature
  132. QE08-200
  133. Adding heater transformer to my 6b4g amp. help a noob please.
  134. Bogen CHB-35a Troubleshooting: Distortion, Power Tubes Very Hot
  135. Big Cap in luxman MB3045
  136. Question about 4x12 cabinet wiring
  137. What happened to Sakuma-san's website ?
  138. Should I ???
  139. Can you classify condition of tubes?
  140. Help: Hickok Western Electric KS-15750-L1 Tubes Tester Maintenance and Calibration
  141. ecc99 preamp into an amp
  142. AI 500 Volume pot advice wanted.
  143. eico st70 input impedance question
  144. Tube Preamp or Power Amp?
  145. pmillett "Engineer's Amplifier" to mono?
  146. Advice/schematics wanted for HF-81 opt project
  147. 7591 tube, can't find that number on tester.
  148. valve upgrade
  149. has anyone known about Ming Da amplifiers
  150. A nice little valve amplifier
  151. Use rectifier winding for 6.3V DC heater?
  152. Voltage Regulators Zener / Gas Reg
  153. Looking for first tube amp kit.
  154. Which choke is better ?
  155. UK input voltage question
  156. 1sh29b
  157. 6G2 amp - volume and tone play up on one input only
  158. One channel grainy sound
  159. anybody know 6BY5 plate resistance ?
  160. SE 6550
  161. Yaqin MC-100b Volume pot
  162. Pair of possible MC step ups - octal mount
  163. My Mighty Midget
  164. Conrad Johnson MV75 "update circuit drawing"
  165. Cheap Red LED bias on ecc83/12ax7
  166. stoneAmp
  167. Project thread: KT88 PP amp
  168. I need the voltages or schematic for a Magnavox 177.55 amp
  169. Different PSE output designs - which to use?
  170. Toroidal (adding a winding)
  171. Kondo Souga - audition
  172. a incar tube/valve line driver
  173. Before I punch the holes.. A quartet of EL84?
  174. Tubes Home Theater 4+1
  175. DAC direct out, not enough gain, help me build a driving stage.
  176. ultra linear aikido with linearizing pentode
  177. Scott 299
  178. OPTs With Multiple Secondaries
  179. Over Four Tons Of Tubes
  180. L channel lower output?
  181. 16LS Amp by S5 Electronics Questions
  182. Heathkit WM-5
  183. 6BL8 not on roll chart
  184. CJ PV-5 PS rebuild
  185. Attenuator for passive pre (LEAK ST 20)
  186. Help ID tubes Plz
  187. Data sheet and load line question
  188. Trouble with Silver to Black face twin mod.
  189. Grommes S35 booster amp output?
  190. dc filament heater - high impedance const. voltage
  191. Schematic for Modwright SWL 9.0se Preamp
  192. GZ37 substitutes
  193. output attenuation
  194. My humming home made tube amp
  195. Shared Cathodes 300b
  196. Bogen CHB-35 for Music...
  197. correctly connecting PT for 110/220 volts
  198. voltage divider
  199. "Bypass caps" and their effect on perceived sound
  200. Repair of Cayin HA-2 Tube Headphone Amp
  201. Best Drive for EL34
  202. Needing Schematic for Grommes LJ7 please.
  203. 6550C v. KT88
  204. ECC81 MU-Follower consumption
  205. Locating hum source
  206. c3g self oscillation problem - a newbie needs help!
  207. Voice of music console help
  208. One tube radio
  209. Triodes with better "look&feel"
  210. HV Supply
  211. Will this arrangement impact the input impedence of the cathode follower?
  212. Measuring preamp output impedance
  213. Capacitor from 120VAC to ground
  214. I have power but no sound???
  215. Using a function generator with a tube amp?
  216. What resistors to use on KT88s tubes?
  217. Opinions on Raysonic sp-200 + Raysonic 168 CD
  218. Lab power supply for testing tubes
  219. Could really use some help here!
  220. Help~ GU50 ?
  221. Some Power Supply Help
  222. newbies beware of lampizator srpp pdf
  223. Headphone output
  224. Has anyone played around with this as an amp front end?
  225. Help for Dynavox VR-70E
  226. Heathkit TT-1 (testing a 199, 99 tube)
  227. Tube And Transformer I/V Converter For Differential Current DAC
  228. Volume increases as amp warms up
  229. New 6V6 Build - Suggestions Needed
  230. Tubes Numbers
  231. VTL
  232. Visit to KR audio Prague 20120921
  233. Where did he posted it?
  234. Problems with PT325.2i
  235. What phono preamp with Dynaco MKIII
  236. opinions on supporting a past sale/trade deal
  237. Series connection of regulator tubes
  238. Preamp buzzes when volume is at zero?
  239. Hrrrrmphhhff. PSU design error and how to cope with it
  240. 300B fixed bias specs
  241. Battery filament for 4P1L
  242. Need pro help with this tube amp.
  243. Need help with UTC transformer
  244. Very interesting 300b design
  245. How to understand the power output in this case?
  246. K12G Help
  247. all dht se PX4
  248. multiple output transformers per channel
  249. What would you change in this schematic? (PP amp)
  250. Anyone know where to get this type of breadboard?

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