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  1. Dynaco switchable diode/tube rec and driver tube mode
  2. CCS into a VR with Interstage question
  3. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  4. Rectifier and DC filtering relationship question
  5. Class A2 6JD5 Curves
  6. Motorola HS-839 Amp problem
  7. Active valve monitors?
  8. Did I get this load calculation right?
  9. Convergent SL1 original schematic
  10. Bleed down resistor
  11. How do I calculate resistor value in this schematic?
  12. Easy question about tube data sheet
  13. Tube regulator question
  14. Tube amp build for an 1st timer.
  15. Full music 101d input tube/valve
  16. EZ80 Voltage Question
  17. What the heck is this? Bulb?
  18. Audio Note Kit 1 Upgrade
  19. Will this work? (EL34 PP)
  20. Anthem 1 intergrated amp
  21. Tubes and the sun?
  22. Two triodes cascaded cathode follower?
  23. HIRAGA PREAMP PHONO + line
  24. OB2WA Radioactive???
  25. 9 pin tube socket pcb boards with screw terminals
  26. Hai I need a little help on designing a power supply
  27. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  28. Cleaning Up the Noise + Selector Switch Anomalie
  29. first tube preamp
  30. Rescuing a vessel : 1964 HICKOK 539C tube tester
  31. Dynaco Feedback
  32. Mundorf Silver Oil in hot 300B tube amplifier !!
  33. MULLARD 5-20 build with mods
  34. Choke loaded driver with small opt?
  35. Preamp Tube Bias and feedback
  36. Capacitor replacement option
  37. New EL84 SE Amp PCB: The u-SE
  38. Question about Amp Theory
  39. Help needed for modifying DAC-opamp-tube circuit
  40. best way to start with tube amps
  41. Damper diode between C1 and L1
  42. Question about 'near' zero volt bias for low level stages
  43. Filmosound 179 - Should I even bother?
  44. Newbie question
  45. I think I know how it works, but can I get some help? (OddWatt PP)
  46. kt150
  47. As anyone considered black oxide???
  48. OTL question
  49. Headphone amp/preamp project.
  50. Comments or suggestions on this schematic?
  51. Twin Conn Organ 7868 Rebuild
  52. Favorite PP 6550 schematic?
  53. DECWARE Z BOX SCHEMATIC
  54. 6V6
  55. Need suggestion for eliminating noise from aluminum cover
  56. Kuba Serenade Stereo Console question.
  57. Help with tube interchangeability
  58. 6sn7(12au7)-6v6-300b
  59. Westinghouse tube amp MODEL V2508, conversion
  60. Voltage on the chassis, bad xformer?
  61. TubeCad blues...
  62. OPT as PSU filter???
  63. Tube Plate Voltage Timing
  64. Transformer grounding
  65. Two questions concerning bleed resistors
  66. Choke ratings and resistor values in choke input supply?
  67. Novar Spud :: A $200 sweep tube Spud with PCB
  68. Mid 50s 250/500/1000W Valve amp needs some repairs......
  69. I want to learn tubes and set up a workstation
  70. Pre amp wire up__new
  71. allied knight / rauland borg schematic needed
  72. Rollable Tubes
  73. n00b - Leave out the LEDs??
  74. Aikido 5687 all in one kit
  75. 6P13S - WHAT TO DO WITH
  76. el84 set amp for 90db-8ohm speaker?
  77. My first cap coupled 2 stage
  78. Dodd Buffer Tube Rolling?
  79. Lowest THD Tube Design Possible? (Need for a class, I realize it doesn't matter)
  80. Olson-Morgan 6F6 Amplifier Info's needed.
  81. Newbie, Help with datasheet
  82. Conrad Johnson MV55 again - and Hi from a newb
  83. Interesting one piece EL34 PP tube amp diy pcb on ebay
  84. Low power stereo (dual mono) tube headphone amp
  85. 6EJ7's vs. 6JC6A
  86. EL34s Frying in my Cayin A50-T
  87. Grid Leak Amplifier with Unexpected Heater Resistor
  88. 7617 tube data
  89. preamplifier with huge amplification
  90. Counterpoint Amp Output
  91. Phase inverter Gremlins in Philips EL6431 amp
  92. Russian to English Translation needed
  93. Concertina type Phase inverters?
  94. Double C-Core output transformers
  95. Amplifier slew rate and DSD playback
  96. Bypassing volume pot on Cayin integrated tube amp
  97. Distortion when change into ecc83
  98. Mighty Midget Problem (One channel is louder)
  99. Mullard ECL86 3W Economical Amplifier
  100. Building a Baby Huey EL84 amp - might need some pointers
  101. Tranformer Choice
  102. Heathkit WM-5
  103. Aikido preamp power supply
  104. identify this traffo
  105. transformers
  106. parallel tube amplifier.
  107. What to do with a 12" x 8" enclosure?
  108. Odd filament winding
  109. transformers
  110. tube choices for an ST70
  111. "Arabella" - 6EM7 amplifier on Acacia
  112. CDE acquisition of Orange Drop Brand
  113. What is this inductor?
  114. Counterpoint SA-5000 upgrade
  115. Homebrew tube preamp noise
  116. Cathode follower with 12ax7
  117. CPC Japanese Tubes ?
  118. Cary SLA-70 with KT88 - worth building?
  119. Opinions or comments on schematic please
  120. Is this a tie point or a diode?
  121. Need Pinout Help, Silvertone Organ Amp
  122. Pushing EL36 ??
  123. Power Supply Chokes Question ?
  124. First Post, Viking/T Eaton co Tube Amp Issues! *Pictures*
  125. Knight 40 W Amp. tubes correct? Location?
  126. Push-Pull Output Transformer with Cathode Feedback Winding?
  127. 300b amp help
  128. Help with Dynaco value
  129. INTERSTAGE 2A3/211
  130. TCJ Push Pull Amp Calculator question
  131. winter project KT88 PP
  132. En Vogue Darling SRPP SE SRPP tube amp will this work?
  133. Shunt regulation for HT
  134. Unison research simply two, what gridvoltage for EL34?
  135. Finally Measured my Tube Preamp
  136. Aikido octal stereo problems
  137. Philips 5 pin IEC connector in AG9016
  138. Dynaclone OPT replacement - less power than expected
  139. 2 ECL 805 SE
  140. All DHT headphone amp with 4P1L & 307A
  141. cary audio rocket 88 tube amp
  142. Compactron Driver Dynaco MarkIII PCB Design.
  143. Paralelling pentodes ?
  144. KT120 Single Ended Ultralinear
  145. Does a PCL805 glow red at its maximum rating?
  146. V1 Noise Reduction Choices
  147. full pentode ppp
  148. Input transformer question
  149. Is this Tesla ECC803S real or fake?
  150. Michaelson and Austin TVA-1
  151. EN VOGUE DARLING SRPP SE PARALLEL 1626 REVIEW NEEDED
  152. 6EB8\6GN8 P-P Output 2*12w Class-B
  153. B+ regulator for KT88 amplifier
  154. Help figuring out wind/hiss
  155. 12A07 low voltage preamp
  156. Buying guideline for 6c33c
  157. New 211/VT4c shootout
  158. GM70 Output transformer
  159. OTL 2013
  160. Octal Preamp Triode Thoughts (IDHT's)
  161. Wrong tube and pin wiring
  162. New Production Tube If Transformers from Germany
  163. Vishay TX2575 resistor placement
  164. Direct connected madness
  165. RH84 build & quite a few questions...
  166. Tube preamp kits
  167. Capacitor query L1 audio innovation pre-amp
  168. Someone Told Me This Wouldn't Work?
  169. How to "do" a FM Multipath Monitor
  170. EF86 pins 2 & 7
  171. Welborne 300B DRD amp
  172. My First Tube Project: 6N16B
  173. Triode mod with G2, G3 connect to anode
  174. Valve mic cable diy
  175. Toroidal transformer is bad
  176. Coupling caps suggestions
  177. EABC80 and the double diode triode?
  178. Frequent Question -Golden Tube Audio 300B monos schematic??
  179. Transformer Terminal Designators
  180. Slew rate limiting in output stage
  181. Sonic Frontiers Line 2 - no line level output
  182. KT88 Ultralinear?
  183. Help with 12AT7 CCDA - EL34 SE Amp Design?
  184. THE FINAL AMP
  185. need 6SN7/6H8C reccom. for amp
  186. 211 parallel amp (made in Iran)
  187. Changing to twisted pair heater from one side grounded
  188. Choke input supply. Cap question.
  189. tube rectifier 6AX4GT
  190. RS1003 triode mode Spice models
  191. Firestone 6V6 Monoblock Problems
  192. Lundahl Output transformers?
  193. GMI-6 / GMI-6-1
  194. New power transformer for Millett's DCPP amp,now available at EDCOR
  195. Tuned Circuit?
  196. remote lead for tubes
  197. Building a Stereo EL84 auto bias PP tube amp
  198. Tube conversion of differential to single ended signal
  199. A transconductance tube amplifier
  200. Unknown Tube
  201. 12vdc to 150vac
  202. When is a tube too weak?
  203. The Best Way To Separate L+R and Driver/Output Tube Power Supply ?
  204. Biasing aBerning EA-230
  205. Aikido Noob - Please Help!
  206. Wiring Capacitors in Series
  207. Dynaco ST35 power transformer
  208. sunn 200s diagnosis?
  209. Individual Coupling Caps
  210. Valve Pre > Intergrated amp
  211. Whats the difference RH84 or Mullard 3-3?
  212. Ultra-Linear SE EL84?
  213. Self balancing pp using ccs question
  214. Help: How To Select Schottky Rectifer Diode
  215. 6550 plate resistance in triode mode? Calculate?
  216. making 6sj7 have same gain as 6sl7
  217. Thick Film resistors?
  218. Mounting position EL84
  219. Curve Tracer: Which One To Buy, What To Consider, Options ?
  220. 71A Tube Filament: AC or DC ?
  221. My Current Line + Phono Combo
  222. What is better than one audioromy M-828A FU29?
  223. Mazda tube
  224. Aikido selectable gain
  225. Preamp power supply
  226. Has anyone used CV9 tubes in a pp design
  227. 9 pin Vector turret socketsIt seems that Vector turret 9 pin sockets are hard to come
  228. BALANCED AUDIO VK 5 VK20
  229. Output transformer computation
  230. 2E25 Tetrode in Ultra-linear mode...NICE !!!
  231. Input Attenuators
  232. new build SE to EL 508
  233. found this on kickstarter
  234. SE Output Transformer question
  235. Safety of DC-coupled inputs
  236. Found some old tubes.
  237. Presence control
  238. lafayette pa 622 -> Guitar amp conversion
  239. Fixing an amp head - bad tubes?
  240. EL84 what factory produced it?
  241. Trio Corp 300b fake?
  242. Cheap triode class A 3Watt + assembled/kit you know ?
  243. Elekit tu 879s upgrades
  244. EZ80 Choke Input Max Capacitance
  245. Correct measurement of filament voltage.
  246. Who put the "half" in the Koren SPICE equation
  247. 5Y3 tube rectifier
  248. Triode or ultraliner connected ?
  249. What is the "Tube Sound"?
  250. Here are some 12B4A, CCS, Preamp Circuit and Spice models

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