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  1. Simple Tube Amp
  2. Portable tube amplifier
  3. Using the heater supply to get a DC source
  4. phono/aux switching problem
  5. What is the best EF86 in production at the moment
  6. 12AX7 / 12AT7 Mu Follower Phono
  7. Kreisler Stereo 6 speaker impedance
  8. A serviceable life.....
  9. TV 7 DU Tube info
  10. Twinings Tea Transformer Covers
  11. ECC88 with 12V heaters
  12. CXhange opa 627ap for an audio gd moon ?
  13. PP-EL34/6550/EL-PL504 or KT88 Bal. innput
  14. fatman itube mk1 sounds bad
  15. Chinese FD-71 tube is the russian GK-71 ?
  16. Leak stereo 20 diagnosis
  17. VTL
  18. Looking for tubed MC pre-pre
  19. Correct wiring types
  20. Couplates
  21. Op-Amp Like Line Preamp
  22. SE GU-50/6CB6 Pentode Design
  23. Pioneer SX34
  24. About metal film resistor in a tube tuner
  25. Looking for 52dBs or more MM phono
  26. Winter is coming... Time to start GM70 SE parafeed amp
  27. Doug Self: Wireless World Magazine Article Archive
  28. Relay short circuit
  29. EL34 PP oscillating
  30. Dynaco switchable diode/tube rec and driver tube mode
  31. CCS into a VR with Interstage question
  32. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  33. Rectifier and DC filtering relationship question
  34. Class A2 6JD5 Curves
  35. Motorola HS-839 Amp problem
  36. Active valve monitors?
  37. Did I get this load calculation right?
  38. Convergent SL1 original schematic
  39. Bleed down resistor
  40. How do I calculate resistor value in this schematic?
  41. Easy question about tube data sheet
  42. Tube regulator question
  43. Tube amp build for an 1st timer.
  44. Full music 101d input tube/valve
  45. EZ80 Voltage Question
  46. What the heck is this? Bulb?
  47. Audio Note Kit 1 Upgrade
  48. Will this work? (EL34 PP)
  49. Anthem 1 intergrated amp
  50. Tubes and the sun?
  51. Two triodes cascaded cathode follower?
  52. HIRAGA PREAMP PHONO + line
  53. OB2WA Radioactive???
  54. 9 pin tube socket pcb boards with screw terminals
  55. Hai I need a little help on designing a power supply
  56. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  57. Cleaning Up the Noise + Selector Switch Anomalie
  58. first tube preamp
  59. Rescuing a vessel : 1964 HICKOK 539C tube tester
  60. Dynaco Feedback
  61. Mundorf Silver Oil in hot 300B tube amplifier !!
  62. MULLARD 5-20 build with mods
  63. Choke loaded driver with small opt?
  64. Preamp Tube Bias and feedback
  65. Capacitor replacement option
  66. New EL84 SE Amp PCB: The u-SE
  67. Question about Amp Theory
  68. Help needed for modifying DAC-opamp-tube circuit
  69. best way to start with tube amps
  70. Damper diode between C1 and L1
  71. Question about 'near' zero volt bias for low level stages
  72. Filmosound 179 - Should I even bother?
  73. Newbie question
  74. I think I know how it works, but can I get some help? (OddWatt PP)
  75. kt150
  76. As anyone considered black oxide???
  77. OTL question
  78. Headphone amp/preamp project.
  79. Comments or suggestions on this schematic?
  80. Twin Conn Organ 7868 Rebuild
  81. Favorite PP 6550 schematic?
  82. DECWARE Z BOX SCHEMATIC
  83. 6V6
  84. Need suggestion for eliminating noise from aluminum cover
  85. Kuba Serenade Stereo Console question.
  86. Help with tube interchangeability
  87. 6sn7(12au7)-6v6-300b
  88. Westinghouse tube amp MODEL V2508, conversion
  89. Voltage on the chassis, bad xformer?
  90. TubeCad blues...
  91. OPT as PSU filter???
  92. Tube Plate Voltage Timing
  93. Transformer grounding
  94. Two questions concerning bleed resistors
  95. Choke ratings and resistor values in choke input supply?
  96. Novar Spud :: A $200 sweep tube Spud with PCB
  97. Mid 50s 250/500/1000W Valve amp needs some repairs......
  98. I want to learn tubes and set up a workstation
  99. Pre amp wire up__new
  100. allied knight / rauland borg schematic needed
  101. Rollable Tubes
  102. n00b - Leave out the LEDs??
  103. Aikido 5687 all in one kit
  104. 6P13S - WHAT TO DO WITH
  105. el84 set amp for 90db-8ohm speaker?
  106. My first cap coupled 2 stage
  107. Dodd Buffer Tube Rolling?
  108. Lowest THD Tube Design Possible? (Need for a class, I realize it doesn't matter)
  109. Olson-Morgan 6F6 Amplifier Info's needed.
  110. Newbie, Help with datasheet
  111. Conrad Johnson MV55 again - and Hi from a newb
  112. Interesting one piece EL34 PP tube amp diy pcb on ebay
  113. Low power stereo (dual mono) tube headphone amp
  114. 6EJ7's vs. 6JC6A
  115. EL34s Frying in my Cayin A50-T
  116. Grid Leak Amplifier with Unexpected Heater Resistor
  117. 7617 tube data
  118. preamplifier with huge amplification
  119. Counterpoint Amp Output
  120. Phase inverter Gremlins in Philips EL6431 amp
  121. Russian to English Translation needed
  122. Concertina type Phase inverters?
  123. Double C-Core output transformers
  124. Amplifier slew rate and DSD playback
  125. Bypassing volume pot on Cayin integrated tube amp
  126. Distortion when change into ecc83
  127. Mighty Midget Problem (One channel is louder)
  128. Mullard ECL86 3W Economical Amplifier
  129. Building a Baby Huey EL84 amp - might need some pointers
  130. Tranformer Choice
  131. Heathkit WM-5
  132. Aikido preamp power supply
  133. identify this traffo
  134. transformers
  135. parallel tube amplifier.
  136. What to do with a 12" x 8" enclosure?
  137. Odd filament winding
  138. transformers
  139. tube choices for an ST70
  140. "Arabella" - 6EM7 amplifier on Acacia
  141. CDE acquisition of Orange Drop Brand
  142. What is this inductor?
  143. Counterpoint SA-5000 upgrade
  144. Homebrew tube preamp noise
  145. Cathode follower with 12ax7
  146. CPC Japanese Tubes ?
  147. Cary SLA-70 with KT88 - worth building?
  148. Opinions or comments on schematic please
  149. Is this a tie point or a diode?
  150. Need Pinout Help, Silvertone Organ Amp
  151. Pushing EL36 ??
  152. Power Supply Chokes Question ?
  153. First Post, Viking/T Eaton co Tube Amp Issues! *Pictures*
  154. Knight 40 W Amp. tubes correct? Location?
  155. Push-Pull Output Transformer with Cathode Feedback Winding?
  156. 300b amp help
  157. Help with Dynaco value
  158. INTERSTAGE 2A3/211
  159. TCJ Push Pull Amp Calculator question
  160. winter project KT88 PP
  161. En Vogue Darling SRPP SE SRPP tube amp will this work?
  162. Shunt regulation for HT
  163. Unison research simply two, what gridvoltage for EL34?
  164. Finally Measured my Tube Preamp
  165. Aikido octal stereo problems
  166. Philips 5 pin IEC connector in AG9016
  167. Dynaclone OPT replacement - less power than expected
  168. 2 ECL 805 SE
  169. All DHT headphone amp with 4P1L & 307A
  170. cary audio rocket 88 tube amp
  171. Compactron Driver Dynaco MarkIII PCB Design.
  172. Paralelling pentodes ?
  173. KT120 Single Ended Ultralinear
  174. Does a PCL805 glow red at its maximum rating?
  175. V1 Noise Reduction Choices
  176. full pentode ppp
  177. Input transformer question
  178. Is this Tesla ECC803S real or fake?
  179. Michaelson and Austin TVA-1
  180. EN VOGUE DARLING SRPP SE PARALLEL 1626 REVIEW NEEDED
  181. 6EB8\6GN8 P-P Output 2*12w Class-B
  182. B+ regulator for KT88 amplifier
  183. Help figuring out wind/hiss
  184. 12A07 low voltage preamp
  185. Buying guideline for 6c33c
  186. New 211/VT4c shootout
  187. GM70 Output transformer
  188. OTL 2013
  189. Octal Preamp Triode Thoughts (IDHT's)
  190. Wrong tube and pin wiring
  191. New Production Tube If Transformers from Germany
  192. Vishay TX2575 resistor placement
  193. Direct connected madness
  194. RH84 build & quite a few questions...
  195. Tube preamp kits
  196. Capacitor query L1 audio innovation pre-amp
  197. Someone Told Me This Wouldn't Work?
  198. How to "do" a FM Multipath Monitor
  199. EF86 pins 2 & 7
  200. Welborne 300B DRD amp
  201. My First Tube Project: 6N16B
  202. Triode mod with G2, G3 connect to anode
  203. Valve mic cable diy
  204. Toroidal transformer is bad
  205. Coupling caps suggestions
  206. EABC80 and the double diode triode?
  207. Frequent Question -Golden Tube Audio 300B monos schematic??
  208. Transformer Terminal Designators
  209. Slew rate limiting in output stage
  210. Sonic Frontiers Line 2 - no line level output
  211. KT88 Ultralinear?
  212. Help with 12AT7 CCDA - EL34 SE Amp Design?
  213. THE FINAL AMP
  214. need 6SN7/6H8C reccom. for amp
  215. 211 parallel amp (made in Iran)
  216. Changing to twisted pair heater from one side grounded
  217. Choke input supply. Cap question.
  218. tube rectifier 6AX4GT
  219. RS1003 triode mode Spice models
  220. Firestone 6V6 Monoblock Problems
  221. Lundahl Output transformers?
  222. GMI-6 / GMI-6-1
  223. New power transformer for Millett's DCPP amp,now available at EDCOR
  224. Tuned Circuit?
  225. remote lead for tubes
  226. Building a Stereo EL84 auto bias PP tube amp
  227. Tube conversion of differential to single ended signal
  228. A transconductance tube amplifier
  229. Unknown Tube
  230. 12vdc to 150vac
  231. When is a tube too weak?
  232. The Best Way To Separate L+R and Driver/Output Tube Power Supply ?
  233. Biasing aBerning EA-230
  234. Aikido Noob - Please Help!
  235. Wiring Capacitors in Series
  236. Dynaco ST35 power transformer
  237. sunn 200s diagnosis?
  238. Individual Coupling Caps
  239. Valve Pre > Intergrated amp
  240. Whats the difference RH84 or Mullard 3-3?
  241. Ultra-Linear SE EL84?
  242. Self balancing pp using ccs question
  243. Help: How To Select Schottky Rectifer Diode
  244. 6550 plate resistance in triode mode? Calculate?
  245. making 6sj7 have same gain as 6sl7
  246. Thick Film resistors?
  247. Mounting position EL84
  248. Curve Tracer: Which One To Buy, What To Consider, Options ?
  249. 71A Tube Filament: AC or DC ?
  250. My Current Line + Phono Combo

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