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  1. Anyone have experience with Shuguang 805A
  2. The emperor's new amplifier
  3. Power supply question:twin choke input?
  4. El-84 vs El-86
  5. Modifying Tektronix Type-E Plugin
  6. radio coming thru speakers.
  7. FM tube tuner
  8. diy el 34 se
  9. Transformers Specs for a 2x KT88 Amp
  10. 805 Positive or Negative Grid
  11. Point To Point, 100 percent, No Kit
  12. More line loads etc
  13. B300 C120 rectifier replacement.
  14. Triode simulation/emulation with solid state
  15. What is the driver circuit here?
  16. Dynaco Mark III
  17. ReCap- Heathkit AA-151 Help
  18. Hammond Chassis?
  19. How about an IXCP10M90 as a FETRON
  20. PUSH PULL SE ???
  21. More load lines...
  22. 7193/2C22: wich brand's the best?
  23. Bumed out over this Setchell Carlson
  24. Looking for Electron flow diagram
  25. Why Only Automatic/Semi-Automatic Bias?
  26. Audio Note M-Zero preamp
  27. Load lines. What?
  28. Preamp - pop on channel change
  29. Just for interest.
  30. 813 push-pull output 250W tube amp
  31. What sort of resistors are fine to use in tube amps?
  32. How Not To Pack DHTs For Postal Shipment
  33. Help me ID this trafo and tubes..
  34. Full PSE Amp /only 6E5P/
  35. ATH90
  36. Corroded valve pins
  37. Power supply advice needed
  38. Big Capacitors in PSU
  39. 6CD6G Tube amp
  40. Removal of Cathode Follower in JE Labs Circuit
  41. Q: Cascaded Transformers, S&B102+LL7903
  42. Threshold dac 1e possible modd
  43. Need Help with PSVANE 6CA7-T
  44. Why kind of Vacuun tube is the Tung-Sol TS 930 ??
  45. Magnetic Ballast (Sylvania) MB2 x 40/120 RS
  46. Recommendations & Budget for DIY Tube Amp kit?
  47. Recommend a good plate choke for 5842 tube
  48. Recomendations for SE 6AQ5 Schematics?
  49. ST35 Phase Splitter
  50. german console pull recap Project - help needed
  51. 6B4G Monkey help
  52. These transformers can be used for EL84 SE?
  53. 300B...Ebay or DIY??
  54. Higher gain twin triode!
  55. ARC V70 bias
  56. 70v transformers explored.
  57. Are these caps stuffed ?
  58. Anyone recognizes this amp ?
  59. What is Simplest and Best 6550 PP What is Simplest and Best 6L6 PP circuit? (PK)
  60. My tube differential amplifier
  61. Helping a friend build a tube headphone amp.
  62. Tango XE-20S, tube option
  63. -follower with mosfet... how stable ?
  64. 5k or 2.5k for 6s45p
  65. minor hum problem
  66. Help to choose budget Tube Amp....
  67. Vao
  68. Help with tube-rolling 300b Ming-Da amp?
  69. EF184 pins 1 and 3
  70. aikido pre (5687 all in one) HUMM!!
  71. Question about tube datasheets
  72. EL84 "typical" amplifier
  73. Packing heat.
  74. Current rating for power transformer.
  75. Pentode Odd Behavior
  76. Lower Screen Voltage KT88, choke input + Cap input supply
  77. tannoy line trans
  78. Hi Gain Inverter for a PP amp
  79. Help looking for a project
  80. Dynaco MkIII bias flutter/stability...
  81. grid leak resistor?
  82. 16LS Stereo Tube Amplifier and how to connect to Baxandall Tube stereo tone control
  83. Fisher 800-C blown fuse
  84. testing 300B on Hickok 539B/C
  85. cathode bias imbalance
  86. DIY M60 OTL Power Amplifiers
  87. Invisible gain...Aikido content
  88. Vacuum Tube SPICE Models
  89. Tamura interstages
  90. Jolida 502/302b power transformer.
  91. Bogen mo-200
  92. Phono Circuit Noise Factor
  93. Input impedance of this headphone amplifier ?
  94. D3a preamp.
  95. Newbie needs advice about DIY project please!
  96. PSUD and Off load Voltage
  97. Help! AVO CT-160 Meltdown
  98. Groovewatt-Valve RIAA Phono Preamp?
  99. Mullard EL84 Reissue?
  100. Push Pull amp power supply question
  101. Aikido all in one 5687 tube pre / louder in right Channel
  102. AUDIO RESEARCH SP-6B TUBE AMPLIFIER
  103. Tube Amp
  104. Preamp Pentode Screen Voltage and Gain
  105. AUDIBLE iLLUSION m3A
  106. What "Class" amp is this?
  107. DC coupling
  108. DuKane 1A831
  109. Thump sound at turn off of a power amp
  110. DHT AC heating 120hz phase canceling
  111. REVOX Model 40 amp. Need some hand holding please.
  112. heater imbalance fixable?
  113. Headphone amp
  114. Speech Amp for Modulator
  115. 2.1 channel el84 amp help
  116. Identify PC board in little amp...
  117. dcpp vs sse vs spp? First build
  118. Spice model for GU50 (LT-Spice)
  119. Need schematic of Preamplifier AM 1065
  120. My Journey to build Tube power amplifier B300 SE
  121. Kondo M77
  122. tube datasheet gm
  123. xiang sheng best valves
  124. 6CN6/EL38 Replacement
  125. 4P55
  126. Possible or way to complicated?
  127. Jeff korneff SET 45
  128. Hickok 536 Calibration Procedure?
  129. P2p layout
  130. Heating tubes off mains voltage
  131. EL84 as preamp tube?
  132. Claus Byrith 4-30 PP with KT66
  133. biasing confusion
  134. Bogen HE-10 question
  135. Golden Tube Audio SE-100
  136. Nearing Conclusion of Line/Phono Project
  137. Bias Supply For Citation V?
  138. Tube Integrated Amp
  139. Help needed about a quad FM2 RF
  140. 21jv6 tube datasheet
  141. Interstage transformer theoretical phase change?
  142. Bootstrapping a high pass filter
  143. Help with hybrid Aikido amp! Suggestions please
  144. Need help with a Curcio Daniel 1
  145. Audio Tubes used in Industrial equipment?
  146. Hammond H1 Amp
  147. CCS assisted small signal UL pentode
  148. Dynaco ST35 B+
  149. Simple Tube Amp
  150. Portable tube amplifier
  151. Using the heater supply to get a DC source
  152. phono/aux switching problem
  153. What is the best EF86 in production at the moment
  154. 12AX7 / 12AT7 Mu Follower Phono
  155. Kreisler Stereo 6 speaker impedance
  156. A serviceable life.....
  157. TV 7 DU Tube info
  158. Twinings Tea Transformer Covers
  159. ECC88 with 12V heaters
  160. CXhange opa 627ap for an audio gd moon ?
  161. PP-EL34/6550/EL-PL504 or KT88 Bal. innput
  162. fatman itube mk1 sounds bad
  163. Chinese FD-71 tube is the russian GK-71 ?
  164. Leak stereo 20 diagnosis
  165. VTL
  166. Looking for tubed MC pre-pre
  167. Correct wiring types
  168. Couplates
  169. Op-Amp Like Line Preamp
  170. SE GU-50/6CB6 Pentode Design
  171. Pioneer SX34
  172. About metal film resistor in a tube tuner
  173. Looking for 52dBs or more MM phono
  174. Winter is coming... Time to start GM70 SE parafeed amp
  175. Doug Self: Wireless World Magazine Article Archive
  176. Relay short circuit
  177. EL34 PP oscillating
  178. Dynaco switchable diode/tube rec and driver tube mode
  179. CCS into a VR with Interstage question
  180. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  181. Rectifier and DC filtering relationship question
  182. Class A2 6JD5 Curves
  183. Motorola HS-839 Amp problem
  184. Active valve monitors?
  185. Did I get this load calculation right?
  186. Convergent SL1 original schematic
  187. Bleed down resistor
  188. How do I calculate resistor value in this schematic?
  189. Easy question about tube data sheet
  190. Tube regulator question
  191. Tube amp build for an 1st timer.
  192. Full music 101d input tube/valve
  193. EZ80 Voltage Question
  194. What the heck is this? Bulb?
  195. Audio Note Kit 1 Upgrade
  196. Will this work? (EL34 PP)
  197. Anthem 1 intergrated amp
  198. Tubes and the sun?
  199. Two triodes cascaded cathode follower?
  200. HIRAGA PREAMP PHONO + line
  201. OB2WA Radioactive???
  202. 9 pin tube socket pcb boards with screw terminals
  203. Hai I need a little help on designing a power supply
  204. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  205. Cleaning Up the Noise + Selector Switch Anomalie
  206. first tube preamp
  207. Rescuing a vessel : 1964 HICKOK 539C tube tester
  208. Dynaco Feedback
  209. Mundorf Silver Oil in hot 300B tube amplifier !!
  210. MULLARD 5-20 build with mods
  211. Choke loaded driver with small opt?
  212. Preamp Tube Bias and feedback
  213. New EL84 SE Amp PCB: The u-SE
  214. Question about Amp Theory
  215. Help needed for modifying DAC-opamp-tube circuit
  216. best way to start with tube amps
  217. Damper diode between C1 and L1
  218. Question about 'near' zero volt bias for low level stages
  219. Filmosound 179 - Should I even bother?
  220. Newbie question
  221. I think I know how it works, but can I get some help? (OddWatt PP)
  222. kt150
  223. As anyone considered black oxide???
  224. OTL question
  225. Headphone amp/preamp project.
  226. Comments or suggestions on this schematic?
  227. Twin Conn Organ 7868 Rebuild
  228. Favorite PP 6550 schematic?
  229. DECWARE Z BOX SCHEMATIC
  230. 6V6
  231. Need suggestion for eliminating noise from aluminum cover
  232. Kuba Serenade Stereo Console question.
  233. Help with tube interchangeability
  234. 6sn7(12au7)-6v6-300b
  235. Westinghouse tube amp MODEL V2508, conversion
  236. Voltage on the chassis, bad xformer?
  237. TubeCad blues...
  238. OPT as PSU filter???
  239. Tube Plate Voltage Timing
  240. Transformer grounding
  241. Two questions concerning bleed resistors
  242. Choke ratings and resistor values in choke input supply?
  243. Novar Spud :: A $200 sweep tube Spud with PCB
  244. Mid 50s 250/500/1000W Valve amp needs some repairs......
  245. I want to learn tubes and set up a workstation
  246. Pre amp wire up__new
  247. allied knight / rauland borg schematic needed
  248. Rollable Tubes
  249. n00b - Leave out the LEDs??
  250. Aikido 5687 all in one kit

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