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  1. tannoy line trans
  2. Hi Gain Inverter for a PP amp
  3. Help looking for a project
  4. Dynaco MkIII bias flutter/stability...
  5. grid leak resistor?
  6. 16LS Stereo Tube Amplifier and how to connect to Baxandall Tube stereo tone control
  7. Fisher 800-C blown fuse
  8. testing 300B on Hickok 539B/C
  9. cathode bias imbalance
  10. DIY M60 OTL Power Amplifiers
  11. Invisible gain...Aikido content
  12. Vacuum Tube Spice Models
  13. Tamura interstages
  14. Jolida 502/302b power transformer.
  15. Anyone used high voltage MKP1848 caps
  16. Bogen mo-200
  17. Phono Circuit Noise Factor
  18. Input impedance of this headphone amplifier ?
  19. D3a preamp.
  20. Newbie needs advice about DIY project please!
  21. PSUD and Off load Voltage
  22. Help! AVO CT-160 Meltdown
  23. Groovewatt-Valve RIAA Phono Preamp?
  24. Mullard EL84 Reissue?
  25. Push Pull amp power supply question
  26. Aikido all in one 5687 tube pre / louder in right Channel
  27. AUDIO RESEARCH SP-6B TUBE AMPLIFIER
  28. Tube Amp
  29. Preamp Pentode Screen Voltage and Gain
  30. AUDIBLE iLLUSION m3A
  31. What "Class" amp is this?
  32. DC coupling
  33. DuKane 1A831
  34. Thump sound at turn off of a power amp
  35. DHT AC heating 120hz phase canceling
  36. REVOX Model 40 amp. Need some hand holding please.
  37. heater imbalance fixable?
  38. Headphone amp
  39. Speech Amp for Modulator
  40. 2.1 channel el84 amp help
  41. Identify PC board in little amp...
  42. dcpp vs sse vs spp? First build
  43. Spice model for GU50 (LT-Spice)
  44. Need schematic of Preamplifier AM 1065
  45. My Journey to build Tube power amplifier B300 SE
  46. Kondo M77
  47. tube datasheet gm
  48. xiang sheng best valves
  49. 6CN6/EL38 Replacement
  50. 4P55
  51. Possible or way to complicated?
  52. Jeff korneff SET 45
  53. Hickok 536 Calibration Procedure?
  54. P2p layout
  55. Heating tubes off mains voltage
  56. EL84 as preamp tube?
  57. Claus Byrith 4-30 PP with KT66
  58. biasing confusion
  59. Bogen HE-10 question
  60. Golden Tube Audio SE-100
  61. Nearing Conclusion of Line/Phono Project
  62. Bias Supply For Citation V?
  63. Tube Integrated Amp
  64. Help needed about a quad FM2 RF
  65. 21jv6 tube datasheet
  66. Interstage transformer theoretical phase change?
  67. Bootstrapping a high pass filter
  68. Help with hybrid Aikido amp! Suggestions please
  69. Need help with a Curcio Daniel 1
  70. Audio Tubes used in Industrial equipment?
  71. Hammond H1 Amp
  72. CCS assisted small signal UL pentode
  73. Vox AC50 output transformer rewind
  74. Dynaco ST35 B+
  75. Simple Tube Amp
  76. Portable tube amplifier
  77. Using the heater supply to get a DC source
  78. phono/aux switching problem
  79. What is the best EF86 in production at the moment
  80. 12AX7 / 12AT7 Mu Follower Phono
  81. Kreisler Stereo 6 speaker impedance
  82. A serviceable life.....
  83. TV 7 DU Tube info
  84. Twinings Tea Transformer Covers
  85. ECC88 with 12V heaters
  86. CXhange opa 627ap for an audio gd moon ?
  87. PP-EL34/6550/EL-PL504 or KT88 Bal. innput
  88. fatman itube mk1 sounds bad
  89. Chinese FD-71 tube is the russian GK-71 ?
  90. Leak stereo 20 diagnosis
  91. VTL
  92. Looking for tubed MC pre-pre
  93. Correct wiring types
  94. Couplates
  95. Op-Amp Like Line Preamp
  96. SE GU-50/6CB6 Pentode Design
  97. Pioneer SX34
  98. About metal film resistor in a tube tuner
  99. Looking for 52dBs or more MM phono
  100. Winter is coming... Time to start GM70 SE parafeed amp
  101. Doug Self: Wireless World Magazine Article Archive
  102. Relay short circuit
  103. EL34 PP oscillating
  104. Dynaco switchable diode/tube rec and driver tube mode
  105. CCS into a VR with Interstage question
  106. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  107. Rectifier and DC filtering relationship question
  108. Class A2 6JD5 Curves
  109. Motorola HS-839 Amp problem
  110. Active valve monitors?
  111. Did I get this load calculation right?
  112. Convergent SL1 original schematic
  113. Bleed down resistor
  114. How do I calculate resistor value in this schematic?
  115. Easy question about tube data sheet
  116. Tube regulator question
  117. Tube amp build for an 1st timer.
  118. Full music 101d input tube/valve
  119. EZ80 Voltage Question
  120. What the heck is this? Bulb?
  121. Audio Note Kit 1 Upgrade
  122. Will this work? (EL34 PP)
  123. Anthem 1 intergrated amp
  124. Tubes and the sun?
  125. Two triodes cascaded cathode follower?
  126. HIRAGA PREAMP PHONO + line
  127. OB2WA Radioactive???
  128. 9 pin tube socket pcb boards with screw terminals
  129. Hai I need a little help on designing a power supply
  130. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  131. Cleaning Up the Noise + Selector Switch Anomalie
  132. first tube preamp
  133. Rescuing a vessel : 1964 HICKOK 539C tube tester
  134. Dynaco Feedback
  135. Mundorf Silver Oil in hot 300B tube amplifier !!
  136. MULLARD 5-20 build with mods
  137. Choke loaded driver with small opt?
  138. Preamp Tube Bias and feedback
  139. Capacitor replacement option
  140. New EL84 SE Amp PCB: The u-SE
  141. Question about Amp Theory
  142. Help needed for modifying DAC-opamp-tube circuit
  143. best way to start with tube amps
  144. Damper diode between C1 and L1
  145. Question about 'near' zero volt bias for low level stages
  146. Filmosound 179 - Should I even bother?
  147. Newbie question
  148. I think I know how it works, but can I get some help? (OddWatt PP)
  149. kt150
  150. As anyone considered black oxide???
  151. OTL question
  152. Headphone amp/preamp project.
  153. Comments or suggestions on this schematic?
  154. Twin Conn Organ 7868 Rebuild
  155. Favorite PP 6550 schematic?
  156. DECWARE Z BOX SCHEMATIC
  157. 6V6
  158. Need suggestion for eliminating noise from aluminum cover
  159. Kuba Serenade Stereo Console question.
  160. Help with tube interchangeability
  161. 6sn7(12au7)-6v6-300b
  162. Westinghouse tube amp MODEL V2508, conversion
  163. Voltage on the chassis, bad xformer?
  164. TubeCad blues...
  165. OPT as PSU filter???
  166. Tube Plate Voltage Timing
  167. Transformer grounding
  168. Two questions concerning bleed resistors
  169. Choke ratings and resistor values in choke input supply?
  170. Novar Spud :: A $200 sweep tube Spud with PCB
  171. Mid 50s 250/500/1000W Valve amp needs some repairs......
  172. I want to learn tubes and set up a workstation
  173. Pre amp wire up__new
  174. allied knight / rauland borg schematic needed
  175. Rollable Tubes
  176. n00b - Leave out the LEDs??
  177. Aikido 5687 all in one kit
  178. 6P13S - WHAT TO DO WITH
  179. el84 set amp for 90db-8ohm speaker?
  180. My first cap coupled 2 stage
  181. Dodd Buffer Tube Rolling?
  182. Lowest THD Tube Design Possible? (Need for a class, I realize it doesn't matter)
  183. Olson-Morgan 6F6 Amplifier Info's needed.
  184. Newbie, Help with datasheet
  185. Conrad Johnson MV55 again - and Hi from a newb
  186. Interesting one piece EL34 PP tube amp diy pcb on ebay
  187. Low power stereo (dual mono) tube headphone amp
  188. 6EJ7's vs. 6JC6A
  189. EL34s Frying in my Cayin A50-T
  190. Grid Leak Amplifier with Unexpected Heater Resistor
  191. 7617 tube data
  192. preamplifier with huge amplification
  193. Counterpoint Amp Output
  194. Phase inverter Gremlins in Philips EL6431 amp
  195. Russian to English Translation needed
  196. Concertina type Phase inverters?
  197. Double C-Core output transformers
  198. Amplifier slew rate and DSD playback
  199. Bypassing volume pot on Cayin integrated tube amp
  200. Distortion when change into ecc83
  201. Mighty Midget Problem (One channel is louder)
  202. Mullard ECL86 3W Economical Amplifier
  203. Building a Baby Huey EL84 amp - might need some pointers
  204. Tranformer Choice
  205. Heathkit WM-5
  206. Aikido preamp power supply
  207. identify this traffo
  208. transformers
  209. parallel tube amplifier.
  210. What to do with a 12" x 8" enclosure?
  211. Odd filament winding
  212. transformers
  213. tube choices for an ST70
  214. "Arabella" - 6EM7 amplifier on Acacia
  215. CDE acquisition of Orange Drop Brand
  216. What is this inductor?
  217. Counterpoint SA-5000 upgrade
  218. Homebrew tube preamp noise
  219. Cathode follower with 12ax7
  220. CPC Japanese Tubes ?
  221. Cary SLA-70 with KT88 - worth building?
  222. Opinions or comments on schematic please
  223. Is this a tie point or a diode?
  224. Need Pinout Help, Silvertone Organ Amp
  225. Pushing EL36 ??
  226. Power Supply Chokes Question ?
  227. First Post, Viking/T Eaton co Tube Amp Issues! *Pictures*
  228. Knight 40 W Amp. tubes correct? Location?
  229. Push-Pull Output Transformer with Cathode Feedback Winding?
  230. 300b amp help
  231. Help with Dynaco value
  232. INTERSTAGE 2A3/211
  233. TCJ Push Pull Amp Calculator question
  234. winter project KT88 PP
  235. En Vogue Darling SRPP SE SRPP tube amp will this work?
  236. Shunt regulation for HT
  237. Unison research simply two, what gridvoltage for EL34?
  238. Finally Measured my Tube Preamp
  239. Aikido octal stereo problems
  240. Philips 5 pin IEC connector in AG9016
  241. Dynaclone OPT replacement - less power than expected
  242. 2 ECL 805 SE
  243. All DHT headphone amp with 4P1L & 307A
  244. cary audio rocket 88 tube amp
  245. Compactron Driver Dynaco MarkIII PCB Design.
  246. Paralelling pentodes ?
  247. KT120 Single Ended Ultralinear
  248. Does a PCL805 glow red at its maximum rating?
  249. V1 Noise Reduction Choices
  250. full pentode ppp

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