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  1. Wiring variac
  2. 1SH29B russian miniature tube - useful for audio?
  3. Humming in PP EL84 Tubes aMP.
  4. Repurposing a Tube Reel to Reel
  5. YaQin MC-10L Vs ST70: Sound Quality
  6. Voltage VS. Amperage?
  7. 3 questions about 6B4g
  8. DIY OPT - are these good?
  9. Audio Research regulators
  10. 0C3 for lowering down the screens?
  11. radio like interference condition in SA-100
  12. PCL86 heater flash
  13. Tube powered subwoofer
  14. Anyone have experience with Shuguang 805A
  15. The emperor's new amplifier
  16. Power supply question:twin choke input?
  17. El-84 vs El-86
  18. Modifying Tektronix Type-E Plugin
  19. radio coming thru speakers.
  20. FM tube tuner
  21. diy el 34 se
  22. Transformers Specs for a 2x KT88 Amp
  23. 805 Positive or Negative Grid
  24. Point To Point, 100 percent, No Kit
  25. More line loads etc
  26. B300 C120 rectifier replacement.
  27. Triode simulation/emulation with solid state
  28. What is the driver circuit here?
  29. Dynaco Mark III
  30. ReCap- Heathkit AA-151 Help
  31. Hammond Chassis?
  32. How about an IXCP10M90 as a FETRON
  33. PUSH PULL SE ???
  34. More load lines...
  35. 7193/2C22: wich brand's the best?
  36. Bumed out over this Setchell Carlson
  37. Looking for Electron flow diagram
  38. Why Only Automatic/Semi-Automatic Bias?
  39. Audio Note M-Zero preamp
  40. Load lines. What?
  41. Preamp - pop on channel change
  42. Just for interest.
  43. 813 push-pull output 250W tube amp
  44. What sort of resistors are fine to use in tube amps?
  45. How Not To Pack DHTs For Postal Shipment
  46. Help me ID this trafo and tubes..
  47. Full PSE Amp /only 6E5P/
  48. ATH90
  49. Corroded valve pins
  50. Power supply advice needed
  51. Big Capacitors in PSU
  52. 6CD6G Tube amp
  53. Removal of Cathode Follower in JE Labs Circuit
  54. Q: Cascaded Transformers, S&B102+LL7903
  55. Threshold dac 1e possible modd
  56. Need Help with PSVANE 6CA7-T
  57. Why kind of Vacuun tube is the Tung-Sol TS 930 ??
  58. Magnetic Ballast (Sylvania) MB2 x 40/120 RS
  59. Recommendations & Budget for DIY Tube Amp kit?
  60. Recommend a good plate choke for 5842 tube
  61. Recomendations for SE 6AQ5 Schematics?
  62. ST35 Phase Splitter
  63. german console pull recap Project - help needed
  64. 6B4G Monkey help
  65. These transformers can be used for EL84 SE?
  66. 300B...Ebay or DIY??
  67. Higher gain twin triode!
  68. ARC V70 bias
  69. 70v transformers explored.
  70. Are these caps stuffed ?
  71. Anyone recognizes this amp ?
  72. What is Simplest and Best 6550 PP What is Simplest and Best 6L6 PP circuit? (PK)
  73. My tube differential amplifier
  74. Helping a friend build a tube headphone amp.
  75. Tango XE-20S, tube option
  76. -follower with mosfet... how stable ?
  77. 5k or 2.5k for 6s45p
  78. minor hum problem
  79. Help to choose budget Tube Amp....
  80. Vao
  81. Help with tube-rolling 300b Ming-Da amp?
  82. EF184 pins 1 and 3
  83. aikido pre (5687 all in one) HUMM!!
  84. Question about tube datasheets
  85. EL84 "typical" amplifier
  86. Packing heat.
  87. Current rating for power transformer.
  88. Pentode Odd Behavior
  89. Lower Screen Voltage KT88, choke input + Cap input supply
  90. tannoy line trans
  91. Hi Gain Inverter for a PP amp
  92. Help looking for a project
  93. Dynaco MkIII bias flutter/stability...
  94. grid leak resistor?
  95. 16LS Stereo Tube Amplifier and how to connect to Baxandall Tube stereo tone control
  96. Fisher 800-C blown fuse
  97. cathode bias imbalance
  98. DIY M60 OTL Power Amplifiers
  99. Invisible gain...Aikido content
  100. Vacuum Tube SPICE Models
  101. Tamura interstages
  102. Jolida 502/302b power transformer.
  103. Bogen mo-200
  104. Phono Circuit Noise Factor
  105. Input impedance of this headphone amplifier ?
  106. D3a preamp.
  107. Newbie needs advice about DIY project please!
  108. PSUD and Off load Voltage
  109. Groovewatt-Valve RIAA Phono Preamp?
  110. Mullard EL84 Reissue?
  111. Push Pull amp power supply question
  112. Aikido all in one 5687 tube pre / louder in right Channel
  113. AUDIO RESEARCH SP-6B TUBE AMPLIFIER
  114. Tube Amp
  115. Preamp Pentode Screen Voltage and Gain
  116. AUDIBLE iLLUSION m3A
  117. What "Class" amp is this?
  118. DC coupling
  119. DuKane 1A831
  120. Thump sound at turn off of a power amp
  121. DHT AC heating 120hz phase canceling
  122. REVOX Model 40 amp. Need some hand holding please.
  123. heater imbalance fixable?
  124. Headphone amp
  125. Speech Amp for Modulator
  126. 2.1 channel el84 amp help
  127. Identify PC board in little amp...
  128. Spice model for GU50 (LT-Spice)
  129. Need schematic of Preamplifier AM 1065
  130. My Journey to build Tube power amplifier B300 SE
  131. Kondo M77
  132. tube datasheet gm
  133. xiang sheng best valves
  134. 6CN6/EL38 Replacement
  135. 4P55
  136. Possible or way to complicated?
  137. Jeff korneff SET 45
  138. P2p layout
  139. Heating tubes off mains voltage
  140. EL84 as preamp tube?
  141. Claus Byrith 4-30 PP with KT66
  142. biasing confusion
  143. Bogen HE-10 question
  144. Golden Tube Audio SE-100
  145. Nearing Conclusion of Line/Phono Project
  146. Bias Supply For Citation V?
  147. Tube Integrated Amp
  148. Help needed about a quad FM2 RF
  149. 21jv6 tube datasheet
  150. Interstage transformer theoretical phase change?
  151. Bootstrapping a high pass filter
  152. Help with hybrid Aikido amp! Suggestions please
  153. Need help with a Curcio Daniel 1
  154. Audio Tubes used in Industrial equipment?
  155. Hammond H1 Amp
  156. CCS assisted small signal UL pentode
  157. Dynaco ST35 B+
  158. Simple Tube Amp
  159. Portable tube amplifier
  160. Using the heater supply to get a DC source
  161. phono/aux switching problem
  162. What is the best EF86 in production at the moment
  163. 12AX7 / 12AT7 Mu Follower Phono
  164. Kreisler Stereo 6 speaker impedance
  165. A serviceable life.....
  166. TV 7 DU Tube info
  167. Twinings Tea Transformer Covers
  168. ECC88 with 12V heaters
  169. CXhange opa 627ap for an audio gd moon ?
  170. PP-EL34/6550/EL-PL504 or KT88 Bal. innput
  171. fatman itube mk1 sounds bad
  172. Chinese FD-71 tube is the russian GK-71 ?
  173. Leak stereo 20 diagnosis
  174. VTL
  175. Looking for tubed MC pre-pre
  176. Correct wiring types
  177. Couplates
  178. Op-Amp Like Line Preamp
  179. SE GU-50/6CB6 Pentode Design
  180. Pioneer SX34
  181. About metal film resistor in a tube tuner
  182. Looking for 52dBs or more MM phono
  183. Winter is coming... Time to start GM70 SE parafeed amp
  184. Doug Self: Wireless World Magazine Article Archive
  185. Relay short circuit
  186. EL34 PP oscillating
  187. Dynaco switchable diode/tube rec and driver tube mode
  188. CCS into a VR with Interstage question
  189. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  190. Rectifier and DC filtering relationship question
  191. Class A2 6JD5 Curves
  192. Motorola HS-839 Amp problem
  193. Active valve monitors?
  194. Did I get this load calculation right?
  195. Convergent SL1 original schematic
  196. Bleed down resistor
  197. How do I calculate resistor value in this schematic?
  198. Easy question about tube data sheet
  199. Tube regulator question
  200. Tube amp build for an 1st timer.
  201. Full music 101d input tube/valve
  202. EZ80 Voltage Question
  203. What the heck is this? Bulb?
  204. Audio Note Kit 1 Upgrade
  205. Will this work? (EL34 PP)
  206. Anthem 1 intergrated amp
  207. Tubes and the sun?
  208. Two triodes cascaded cathode follower?
  209. HIRAGA PREAMP PHONO + line
  210. OB2WA Radioactive???
  211. 9 pin tube socket pcb boards with screw terminals
  212. Hai I need a little help on designing a power supply
  213. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  214. Cleaning Up the Noise + Selector Switch Anomalie
  215. first tube preamp
  216. Dynaco Feedback
  217. Mundorf Silver Oil in hot 300B tube amplifier !!
  218. MULLARD 5-20 build with mods
  219. Choke loaded driver with small opt?
  220. Preamp Tube Bias and feedback
  221. New EL84 SE Amp PCB: The u-SE
  222. Question about Amp Theory
  223. Help needed for modifying DAC-opamp-tube circuit
  224. best way to start with tube amps
  225. Damper diode between C1 and L1
  226. Question about 'near' zero volt bias for low level stages
  227. Filmosound 179 - Should I even bother?
  228. Newbie question
  229. I think I know how it works, but can I get some help? (OddWatt PP)
  230. kt150
  231. As anyone considered black oxide???
  232. OTL question
  233. Headphone amp/preamp project.
  234. Comments or suggestions on this schematic?
  235. Twin Conn Organ 7868 Rebuild
  236. Favorite PP 6550 schematic?
  237. DECWARE Z BOX SCHEMATIC
  238. 6V6
  239. Need suggestion for eliminating noise from aluminum cover
  240. Kuba Serenade Stereo Console question.
  241. Help with tube interchangeability
  242. 6sn7(12au7)-6v6-300b
  243. Westinghouse tube amp MODEL V2508, conversion
  244. Voltage on the chassis, bad xformer?
  245. TubeCad blues...
  246. OPT as PSU filter???
  247. Tube Plate Voltage Timing
  248. Transformer grounding
  249. Two questions concerning bleed resistors
  250. Choke ratings and resistor values in choke input supply?

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