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  1. El-84 vs El-86
  2. Modifying Tektronix Type-E Plugin
  3. radio coming thru speakers.
  4. FM tube tuner
  5. diy el 34 se
  6. Transformers Specs for a 2x KT88 Amp
  7. 805 Positive or Negative Grid
  8. Point To Point, 100 percent, No Kit
  9. More line loads etc
  10. B300 C120 rectifier replacement.
  11. Triode simulation/emulation with solid state
  12. What is the driver circuit here?
  13. Dynaco Mark III
  14. ReCap- Heathkit AA-151 Help
  15. Hammond Chassis?
  16. How about an IXCP10M90 as a FETRON
  17. PUSH PULL SE ???
  18. More load lines...
  19. 7193/2C22: wich brand's the best?
  20. Bumed out over this Setchell Carlson
  21. Looking for Electron flow diagram
  22. Why Only Automatic/Semi-Automatic Bias?
  23. Audio Note M-Zero preamp
  24. Load lines. What?
  25. Preamp - pop on channel change
  26. Just for interest.
  27. 813 push-pull output 250W tube amp
  28. What sort of resistors are fine to use in tube amps?
  29. How Not To Pack DHTs For Postal Shipment
  30. Help me ID this trafo and tubes..
  31. Full PSE Amp /only 6E5P/
  32. ATH90
  33. Corroded valve pins
  34. Power supply advice needed
  35. Big Capacitors in PSU
  36. 6CD6G Tube amp
  37. Removal of Cathode Follower in JE Labs Circuit
  38. Q: Cascaded Transformers, S&B102+LL7903
  39. Threshold dac 1e possible modd
  40. Need Help with PSVANE 6CA7-T
  41. Why kind of Vacuun tube is the Tung-Sol TS 930 ??
  42. Magnetic Ballast (Sylvania) MB2 x 40/120 RS
  43. Recommendations & Budget for DIY Tube Amp kit?
  44. Recommend a good plate choke for 5842 tube
  45. Recomendations for SE 6AQ5 Schematics?
  46. ST35 Phase Splitter
  47. german console pull recap Project - help needed
  48. 6B4G Monkey help
  49. These transformers can be used for EL84 SE?
  50. 300B...Ebay or DIY??
  51. Higher gain twin triode!
  52. ARC V70 bias
  53. 70v transformers explored.
  54. Are these caps stuffed ?
  55. Anyone recognizes this amp ?
  56. What is Simplest and Best 6550 PP What is Simplest and Best 6L6 PP circuit? (PK)
  57. My tube differential amplifier
  58. Helping a friend build a tube headphone amp.
  59. Tango XE-20S, tube option
  60. -follower with mosfet... how stable ?
  61. 5k or 2.5k for 6s45p
  62. minor hum problem
  63. Help to choose budget Tube Amp....
  64. Vao
  65. Help with tube-rolling 300b Ming-Da amp?
  66. EF184 pins 1 and 3
  67. aikido pre (5687 all in one) HUMM!!
  68. Question about tube datasheets
  69. EL84 "typical" amplifier
  70. Packing heat.
  71. Current rating for power transformer.
  72. Pentode Odd Behavior
  73. Lower Screen Voltage KT88, choke input + Cap input supply
  74. tannoy line trans
  75. Hi Gain Inverter for a PP amp
  76. Help looking for a project
  77. Dynaco MkIII bias flutter/stability...
  78. grid leak resistor?
  79. 16LS Stereo Tube Amplifier and how to connect to Baxandall Tube stereo tone control
  80. Fisher 800-C blown fuse
  81. testing 300B on Hickok 539B/C
  82. cathode bias imbalance
  83. DIY M60 OTL Power Amplifiers
  84. Invisible gain...Aikido content
  85. Vacuum Tube Spice Models
  86. Tamura interstages
  87. Jolida 502/302b power transformer.
  88. Anyone used high voltage MKP1848 caps
  89. Bogen mo-200
  90. Phono Circuit Noise Factor
  91. Input impedance of this headphone amplifier ?
  92. D3a preamp.
  93. Newbie needs advice about DIY project please!
  94. PSUD and Off load Voltage
  95. Help! AVO CT-160 Meltdown
  96. Groovewatt-Valve RIAA Phono Preamp?
  97. Mullard EL84 Reissue?
  98. Push Pull amp power supply question
  99. Aikido all in one 5687 tube pre / louder in right Channel
  100. AUDIO RESEARCH SP-6B TUBE AMPLIFIER
  101. Tube Amp
  102. Preamp Pentode Screen Voltage and Gain
  103. AUDIBLE iLLUSION m3A
  104. What "Class" amp is this?
  105. DC coupling
  106. DuKane 1A831
  107. Thump sound at turn off of a power amp
  108. DHT AC heating 120hz phase canceling
  109. REVOX Model 40 amp. Need some hand holding please.
  110. heater imbalance fixable?
  111. Headphone amp
  112. Speech Amp for Modulator
  113. 2.1 channel el84 amp help
  114. Identify PC board in little amp...
  115. dcpp vs sse vs spp? First build
  116. Spice model for GU50 (LT-Spice)
  117. Need schematic of Preamplifier AM 1065
  118. My Journey to build Tube power amplifier B300 SE
  119. Kondo M77
  120. tube datasheet gm
  121. xiang sheng best valves
  122. 6CN6/EL38 Replacement
  123. 4P55
  124. Possible or way to complicated?
  125. Jeff korneff SET 45
  126. Hickok 536 Calibration Procedure?
  127. P2p layout
  128. Heating tubes off mains voltage
  129. EL84 as preamp tube?
  130. Claus Byrith 4-30 PP with KT66
  131. biasing confusion
  132. Bogen HE-10 question
  133. Golden Tube Audio SE-100
  134. Nearing Conclusion of Line/Phono Project
  135. Bias Supply For Citation V?
  136. Tube Integrated Amp
  137. Help needed about a quad FM2 RF
  138. 21jv6 tube datasheet
  139. Interstage transformer theoretical phase change?
  140. Bootstrapping a high pass filter
  141. Help with hybrid Aikido amp! Suggestions please
  142. Need help with a Curcio Daniel 1
  143. Audio Tubes used in Industrial equipment?
  144. Hammond H1 Amp
  145. CCS assisted small signal UL pentode
  146. Vox AC50 output transformer rewind
  147. Dynaco ST35 B+
  148. Simple Tube Amp
  149. Portable tube amplifier
  150. Using the heater supply to get a DC source
  151. phono/aux switching problem
  152. What is the best EF86 in production at the moment
  153. 12AX7 / 12AT7 Mu Follower Phono
  154. Kreisler Stereo 6 speaker impedance
  155. A serviceable life.....
  156. TV 7 DU Tube info
  157. Twinings Tea Transformer Covers
  158. ECC88 with 12V heaters
  159. CXhange opa 627ap for an audio gd moon ?
  160. PP-EL34/6550/EL-PL504 or KT88 Bal. innput
  161. fatman itube mk1 sounds bad
  162. Chinese FD-71 tube is the russian GK-71 ?
  163. Leak stereo 20 diagnosis
  164. VTL
  165. Looking for tubed MC pre-pre
  166. Correct wiring types
  167. Couplates
  168. Op-Amp Like Line Preamp
  169. SE GU-50/6CB6 Pentode Design
  170. Pioneer SX34
  171. About metal film resistor in a tube tuner
  172. Looking for 52dBs or more MM phono
  173. Winter is coming... Time to start GM70 SE parafeed amp
  174. Doug Self: Wireless World Magazine Article Archive
  175. Relay short circuit
  176. EL34 PP oscillating
  177. Dynaco switchable diode/tube rec and driver tube mode
  178. CCS into a VR with Interstage question
  179. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  180. Rectifier and DC filtering relationship question
  181. Class A2 6JD5 Curves
  182. Motorola HS-839 Amp problem
  183. Active valve monitors?
  184. Did I get this load calculation right?
  185. Convergent SL1 original schematic
  186. Bleed down resistor
  187. How do I calculate resistor value in this schematic?
  188. Easy question about tube data sheet
  189. Tube regulator question
  190. Tube amp build for an 1st timer.
  191. Full music 101d input tube/valve
  192. EZ80 Voltage Question
  193. What the heck is this? Bulb?
  194. Audio Note Kit 1 Upgrade
  195. Will this work? (EL34 PP)
  196. Anthem 1 intergrated amp
  197. Tubes and the sun?
  198. Two triodes cascaded cathode follower?
  199. HIRAGA PREAMP PHONO + line
  200. OB2WA Radioactive???
  201. 9 pin tube socket pcb boards with screw terminals
  202. Hai I need a little help on designing a power supply
  203. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  204. Cleaning Up the Noise + Selector Switch Anomalie
  205. first tube preamp
  206. Rescuing a vessel : 1964 HICKOK 539C tube tester
  207. Dynaco Feedback
  208. Mundorf Silver Oil in hot 300B tube amplifier !!
  209. MULLARD 5-20 build with mods
  210. Choke loaded driver with small opt?
  211. Preamp Tube Bias and feedback
  212. Capacitor replacement option
  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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