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  1. ATH90
  2. Corroded valve pins
  3. Power supply advice needed
  4. Big Capacitors in PSU
  5. 6CD6G Tube amp
  6. Removal of Cathode Follower in JE Labs Circuit
  7. Q: Cascaded Transformers, S&B102+LL7903
  8. Threshold dac 1e possible modd
  9. Need Help with PSVANE 6CA7-T
  10. Why kind of Vacuun tube is the Tung-Sol TS 930 ??
  11. Magnetic Ballast (Sylvania) MB2 x 40/120 RS
  12. Recommendations & Budget for DIY Tube Amp kit?
  13. Recommend a good plate choke for 5842 tube
  14. Recomendations for SE 6AQ5 Schematics?
  15. ST35 Phase Splitter
  16. german console pull recap Project - help needed
  17. 6B4G Monkey help
  18. These transformers can be used for EL84 SE?
  19. 300B...Ebay or DIY??
  20. Higher gain twin triode!
  21. ARC V70 bias
  22. 70v transformers explored.
  23. Are these caps stuffed ?
  24. Anyone recognizes this amp ?
  25. What is Simplest and Best 6550 PP What is Simplest and Best 6L6 PP circuit? (PK)
  26. My tube differential amplifier
  27. Helping a friend build a tube headphone amp.
  28. Tango XE-20S, tube option
  29. -follower with mosfet... how stable ?
  30. 5k or 2.5k for 6s45p
  31. minor hum problem
  32. Help to choose budget Tube Amp....
  33. Vao
  34. Help with tube-rolling 300b Ming-Da amp?
  35. EF184 pins 1 and 3
  36. aikido pre (5687 all in one) HUMM!!
  37. Question about tube datasheets
  38. EL84 "typical" amplifier
  39. Packing heat.
  40. Current rating for power transformer.
  41. Pentode Odd Behavior
  42. Lower Screen Voltage KT88, choke input + Cap input supply
  43. tannoy line trans
  44. Hi Gain Inverter for a PP amp
  45. Help looking for a project
  46. Dynaco MkIII bias flutter/stability...
  47. grid leak resistor?
  48. 16LS Stereo Tube Amplifier and how to connect to Baxandall Tube stereo tone control
  49. Fisher 800-C blown fuse
  50. testing 300B on Hickok 539B/C
  51. cathode bias imbalance
  52. DIY M60 OTL Power Amplifiers
  53. Invisible gain...Aikido content
  54. Vacuum Tube Spice Models
  55. Tamura interstages
  56. Jolida 502/302b power transformer.
  57. Anyone used high voltage MKP1848 caps
  58. Bogen mo-200
  59. Phono Circuit Noise Factor
  60. Input impedance of this headphone amplifier ?
  61. D3a preamp.
  62. Newbie needs advice about DIY project please!
  63. PSUD and Off load Voltage
  64. Help! AVO CT-160 Meltdown
  65. Groovewatt-Valve RIAA Phono Preamp?
  66. Mullard EL84 Reissue?
  67. Push Pull amp power supply question
  68. Aikido all in one 5687 tube pre / louder in right Channel
  69. AUDIO RESEARCH SP-6B TUBE AMPLIFIER
  70. Tube Amp
  71. Preamp Pentode Screen Voltage and Gain
  72. AUDIBLE iLLUSION m3A
  73. What "Class" amp is this?
  74. DC coupling
  75. DuKane 1A831
  76. Thump sound at turn off of a power amp
  77. DHT AC heating 120hz phase canceling
  78. REVOX Model 40 amp. Need some hand holding please.
  79. heater imbalance fixable?
  80. Headphone amp
  81. Speech Amp for Modulator
  82. 2.1 channel el84 amp help
  83. Identify PC board in little amp...
  84. dcpp vs sse vs spp? First build
  85. Spice model for GU50 (LT-Spice)
  86. Need schematic of Preamplifier AM 1065
  87. My Journey to build Tube power amplifier B300 SE
  88. Kondo M77
  89. tube datasheet gm
  90. xiang sheng best valves
  91. 6CN6/EL38 Replacement
  92. 4P55
  93. Possible or way to complicated?
  94. Jeff korneff SET 45
  95. Hickok 536 Calibration Procedure?
  96. P2p layout
  97. Heating tubes off mains voltage
  98. EL84 as preamp tube?
  99. Claus Byrith 4-30 PP with KT66
  100. biasing confusion
  101. Bogen HE-10 question
  102. Golden Tube Audio SE-100
  103. Nearing Conclusion of Line/Phono Project
  104. Bias Supply For Citation V?
  105. Tube Integrated Amp
  106. Help needed about a quad FM2 RF
  107. 21jv6 tube datasheet
  108. Interstage transformer theoretical phase change?
  109. Bootstrapping a high pass filter
  110. Help with hybrid Aikido amp! Suggestions please
  111. Need help with a Curcio Daniel 1
  112. Audio Tubes used in Industrial equipment?
  113. Hammond H1 Amp
  114. CCS assisted small signal UL pentode
  115. Vox AC50 output transformer rewind
  116. Dynaco ST35 B+
  117. Simple Tube Amp
  118. Portable tube amplifier
  119. Using the heater supply to get a DC source
  120. phono/aux switching problem
  121. What is the best EF86 in production at the moment
  122. 12AX7 / 12AT7 Mu Follower Phono
  123. Kreisler Stereo 6 speaker impedance
  124. A serviceable life.....
  125. TV 7 DU Tube info
  126. Twinings Tea Transformer Covers
  127. ECC88 with 12V heaters
  128. CXhange opa 627ap for an audio gd moon ?
  129. PP-EL34/6550/EL-PL504 or KT88 Bal. innput
  130. fatman itube mk1 sounds bad
  131. Chinese FD-71 tube is the russian GK-71 ?
  132. Leak stereo 20 diagnosis
  133. VTL
  134. Looking for tubed MC pre-pre
  135. Correct wiring types
  136. Couplates
  137. Op-Amp Like Line Preamp
  138. SE GU-50/6CB6 Pentode Design
  139. Pioneer SX34
  140. About metal film resistor in a tube tuner
  141. Looking for 52dBs or more MM phono
  142. Winter is coming... Time to start GM70 SE parafeed amp
  143. Doug Self: Wireless World Magazine Article Archive
  144. Relay short circuit
  145. EL34 PP oscillating
  146. Dynaco switchable diode/tube rec and driver tube mode
  147. CCS into a VR with Interstage question
  148. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  149. Rectifier and DC filtering relationship question
  150. Class A2 6JD5 Curves
  151. Motorola HS-839 Amp problem
  152. Active valve monitors?
  153. Did I get this load calculation right?
  154. Convergent SL1 original schematic
  155. Bleed down resistor
  156. How do I calculate resistor value in this schematic?
  157. Easy question about tube data sheet
  158. Tube regulator question
  159. Tube amp build for an 1st timer.
  160. Full music 101d input tube/valve
  161. EZ80 Voltage Question
  162. What the heck is this? Bulb?
  163. Audio Note Kit 1 Upgrade
  164. Will this work? (EL34 PP)
  165. Anthem 1 intergrated amp
  166. Tubes and the sun?
  167. Two triodes cascaded cathode follower?
  168. HIRAGA PREAMP PHONO + line
  169. OB2WA Radioactive???
  170. 9 pin tube socket pcb boards with screw terminals
  171. Hai I need a little help on designing a power supply
  172. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  173. Cleaning Up the Noise + Selector Switch Anomalie
  174. first tube preamp
  175. Rescuing a vessel : 1964 HICKOK 539C tube tester
  176. Dynaco Feedback
  177. Mundorf Silver Oil in hot 300B tube amplifier !!
  178. MULLARD 5-20 build with mods
  179. Choke loaded driver with small opt?
  180. Preamp Tube Bias and feedback
  181. Capacitor replacement option
  182. New EL84 SE Amp PCB: The u-SE
  183. Question about Amp Theory
  184. Help needed for modifying DAC-opamp-tube circuit
  185. best way to start with tube amps
  186. Damper diode between C1 and L1
  187. Question about 'near' zero volt bias for low level stages
  188. Filmosound 179 - Should I even bother?
  189. Newbie question
  190. I think I know how it works, but can I get some help? (OddWatt PP)
  191. kt150
  192. As anyone considered black oxide???
  193. OTL question
  194. Headphone amp/preamp project.
  195. Comments or suggestions on this schematic?
  196. Twin Conn Organ 7868 Rebuild
  197. Favorite PP 6550 schematic?
  198. DECWARE Z BOX SCHEMATIC
  199. 6V6
  200. Need suggestion for eliminating noise from aluminum cover
  201. Kuba Serenade Stereo Console question.
  202. Help with tube interchangeability
  203. 6sn7(12au7)-6v6-300b
  204. Westinghouse tube amp MODEL V2508, conversion
  205. Voltage on the chassis, bad xformer?
  206. TubeCad blues...
  207. OPT as PSU filter???
  208. Tube Plate Voltage Timing
  209. Transformer grounding
  210. Two questions concerning bleed resistors
  211. Choke ratings and resistor values in choke input supply?
  212. Novar Spud :: A $200 sweep tube Spud with PCB
  213. Mid 50s 250/500/1000W Valve amp needs some repairs......
  214. I want to learn tubes and set up a workstation
  215. Pre amp wire up__new
  216. allied knight / rauland borg schematic needed
  217. Rollable Tubes
  218. n00b - Leave out the LEDs??
  219. Aikido 5687 all in one kit
  220. 6P13S - WHAT TO DO WITH
  221. el84 set amp for 90db-8ohm speaker?
  222. My first cap coupled 2 stage
  223. Dodd Buffer Tube Rolling?
  224. Lowest THD Tube Design Possible? (Need for a class, I realize it doesn't matter)
  225. Olson-Morgan 6F6 Amplifier Info's needed.
  226. Newbie, Help with datasheet
  227. Conrad Johnson MV55 again - and Hi from a newb
  228. Interesting one piece EL34 PP tube amp diy pcb on ebay
  229. Low power stereo (dual mono) tube headphone amp
  230. 6EJ7's vs. 6JC6A
  231. EL34s Frying in my Cayin A50-T
  232. Grid Leak Amplifier with Unexpected Heater Resistor
  233. 7617 tube data
  234. preamplifier with huge amplification
  235. Counterpoint Amp Output
  236. Phase inverter Gremlins in Philips EL6431 amp
  237. Russian to English Translation needed
  238. Concertina type Phase inverters?
  239. Double C-Core output transformers
  240. Amplifier slew rate and DSD playback
  241. Bypassing volume pot on Cayin integrated tube amp
  242. Distortion when change into ecc83
  243. Mighty Midget Problem (One channel is louder)
  244. Mullard ECL86 3W Economical Amplifier
  245. Building a Baby Huey EL84 amp - might need some pointers
  246. Tranformer Choice
  247. Heathkit WM-5
  248. Aikido preamp power supply
  249. identify this traffo
  250. transformers

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