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

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