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  1. ECC88 with 12V heaters
  2. CXhange opa 627ap for an audio gd moon ?
  3. PP-EL34/6550/EL-PL504 or KT88 Bal. innput
  4. fatman itube mk1 sounds bad
  5. Chinese FD-71 tube is the russian GK-71 ?
  6. Leak stereo 20 diagnosis
  7. VTL
  8. Looking for tubed MC pre-pre
  9. Correct wiring types
  10. Couplates
  11. Op-Amp Like Line Preamp
  12. SE GU-50/6CB6 Pentode Design
  13. Pioneer SX34
  14. About metal film resistor in a tube tuner
  15. Looking for 52dBs or more MM phono
  16. Winter is coming... Time to start GM70 SE parafeed amp
  17. Doug Self: Wireless World Magazine Article Archive
  18. Relay short circuit
  19. EL34 PP oscillating
  20. Dynaco switchable diode/tube rec and driver tube mode
  21. CCS into a VR with Interstage question
  22. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  23. Rectifier and DC filtering relationship question
  24. Class A2 6JD5 Curves
  25. Motorola HS-839 Amp problem
  26. Active valve monitors?
  27. Did I get this load calculation right?
  28. Convergent SL1 original schematic
  29. Bleed down resistor
  30. How do I calculate resistor value in this schematic?
  31. Easy question about tube data sheet
  32. Tube regulator question
  33. Tube amp build for an 1st timer.
  34. Full music 101d input tube/valve
  35. EZ80 Voltage Question
  36. What the heck is this? Bulb?
  37. Audio Note Kit 1 Upgrade
  38. Will this work? (EL34 PP)
  39. Anthem 1 intergrated amp
  40. Tubes and the sun?
  41. Two triodes cascaded cathode follower?
  42. HIRAGA PREAMP PHONO + line
  43. OB2WA Radioactive???
  44. 9 pin tube socket pcb boards with screw terminals
  45. Hai I need a little help on designing a power supply
  46. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  47. Cleaning Up the Noise + Selector Switch Anomalie
  48. first tube preamp
  49. Dynaco Feedback
  50. Mundorf Silver Oil in hot 300B tube amplifier !!
  51. MULLARD 5-20 build with mods
  52. Choke loaded driver with small opt?
  53. Preamp Tube Bias and feedback
  54. New EL84 SE Amp PCB: The u-SE
  55. Question about Amp Theory
  56. Help needed for modifying DAC-opamp-tube circuit
  57. best way to start with tube amps
  58. Damper diode between C1 and L1
  59. Question about 'near' zero volt bias for low level stages
  60. Filmosound 179 - Should I even bother?
  61. Newbie question
  62. I think I know how it works, but can I get some help? (OddWatt PP)
  63. kt150
  64. As anyone considered black oxide???
  65. OTL question
  66. Headphone amp/preamp project.
  67. Comments or suggestions on this schematic?
  68. Twin Conn Organ 7868 Rebuild
  69. Favorite PP 6550 schematic?
  70. DECWARE Z BOX SCHEMATIC
  71. 6V6
  72. Need suggestion for eliminating noise from aluminum cover
  73. Kuba Serenade Stereo Console question.
  74. Help with tube interchangeability
  75. 6sn7(12au7)-6v6-300b
  76. Westinghouse tube amp MODEL V2508, conversion
  77. Voltage on the chassis, bad xformer?
  78. TubeCad blues...
  79. OPT as PSU filter???
  80. Tube Plate Voltage Timing
  81. Transformer grounding
  82. Two questions concerning bleed resistors
  83. Choke ratings and resistor values in choke input supply?
  84. Novar Spud :: A $200 sweep tube Spud with PCB
  85. Mid 50s 250/500/1000W Valve amp needs some repairs......
  86. I want to learn tubes and set up a workstation
  87. Pre amp wire up__new
  88. allied knight / rauland borg schematic needed
  89. Rollable Tubes
  90. n00b - Leave out the LEDs??
  91. Aikido 5687 all in one kit
  92. 6P13S - WHAT TO DO WITH
  93. el84 set amp for 90db-8ohm speaker?
  94. My first cap coupled 2 stage
  95. Dodd Buffer Tube Rolling?
  96. Lowest THD Tube Design Possible? (Need for a class, I realize it doesn't matter)
  97. Olson-Morgan 6F6 Amplifier Info's needed.
  98. Newbie, Help with datasheet
  99. Conrad Johnson MV55 again - and Hi from a newb
  100. Interesting one piece EL34 PP tube amp diy pcb on ebay
  101. Low power stereo (dual mono) tube headphone amp
  102. 6EJ7's vs. 6JC6A
  103. EL34s Frying in my Cayin A50-T
  104. Grid Leak Amplifier with Unexpected Heater Resistor
  105. 7617 tube data
  106. preamplifier with huge amplification
  107. Counterpoint Amp Output
  108. Phase inverter Gremlins in Philips EL6431 amp
  109. Russian to English Translation needed
  110. Concertina type Phase inverters?
  111. Double C-Core output transformers
  112. Amplifier slew rate and DSD playback
  113. Bypassing volume pot on Cayin integrated tube amp
  114. Distortion when change into ecc83
  115. Mighty Midget Problem (One channel is louder)
  116. Mullard ECL86 3W Economical Amplifier
  117. Building a Baby Huey EL84 amp - might need some pointers
  118. Tranformer Choice
  119. Heathkit WM-5
  120. Aikido preamp power supply
  121. identify this traffo
  122. transformers
  123. parallel tube amplifier.
  124. What to do with a 12" x 8" enclosure?
  125. Odd filament winding
  126. transformers
  127. tube choices for an ST70
  128. "Arabella" - 6EM7 amplifier on Acacia
  129. CDE acquisition of Orange Drop Brand
  130. What is this inductor?
  131. Counterpoint SA-5000 upgrade
  132. Homebrew tube preamp noise
  133. Cathode follower with 12ax7
  134. CPC Japanese Tubes ?
  135. Cary SLA-70 with KT88 - worth building?
  136. Opinions or comments on schematic please
  137. Is this a tie point or a diode?
  138. Pushing EL36 ??
  139. Power Supply Chokes Question ?
  140. First Post, Viking/T Eaton co Tube Amp Issues! *Pictures*
  141. Knight 40 W Amp. tubes correct? Location?
  142. Push-Pull Output Transformer with Cathode Feedback Winding?
  143. 300b amp help
  144. Help with Dynaco value
  145. INTERSTAGE 2A3/211
  146. TCJ Push Pull Amp Calculator question
  147. winter project KT88 PP
  148. En Vogue Darling SRPP SE SRPP tube amp will this work?
  149. Shunt regulation for HT
  150. Unison research simply two, what gridvoltage for EL34?
  151. Finally Measured my Tube Preamp
  152. Aikido octal stereo problems
  153. Philips 5 pin IEC connector in AG9016
  154. Dynaclone OPT replacement - less power than expected
  155. 2 ECL 805 SE
  156. All DHT headphone amp with 4P1L & 307A
  157. cary audio rocket 88 tube amp
  158. Compactron Driver Dynaco MarkIII PCB Design.
  159. Paralelling pentodes ?
  160. KT120 Single Ended Ultralinear
  161. Does a PCL805 glow red at its maximum rating?
  162. V1 Noise Reduction Choices
  163. full pentode ppp
  164. Input transformer question
  165. Is this Tesla ECC803S real or fake?
  166. Michaelson and Austin TVA-1
  167. EN VOGUE DARLING SRPP SE PARALLEL 1626 REVIEW NEEDED
  168. 6EB8\6GN8 P-P Output 2*12w Class-B
  169. B+ regulator for KT88 amplifier
  170. Help figuring out wind/hiss
  171. 12A07 low voltage preamp
  172. Buying guideline for 6c33c
  173. New 211/VT4c shootout
  174. GM70 Output transformer
  175. OTL 2013
  176. Octal Preamp Triode Thoughts (IDHT's)
  177. Wrong tube and pin wiring
  178. New Production Tube If Transformers from Germany
  179. Direct connected madness
  180. RH84 build & quite a few questions...
  181. Output tansformer Nuvistor 7587/7985
  182. Tube preamp kits
  183. Capacitor query L1 audio innovation pre-amp
  184. Someone Told Me This Wouldn't Work?
  185. How to "do" a FM Multipath Monitor
  186. EF86 pins 2 & 7
  187. Welborne 300B DRD amp
  188. My First Tube Project: 6N16B
  189. Triode mod with G2, G3 connect to anode
  190. Valve mic cable diy
  191. Toroidal transformer is bad
  192. EABC80 and the double diode triode?
  193. Frequent Question -Golden Tube Audio 300B monos schematic??
  194. Transformer Terminal Designators
  195. Slew rate limiting in output stage
  196. Sonic Frontiers Line 2 - no line level output
  197. KT88 Ultralinear?
  198. Help with 12AT7 CCDA - EL34 SE Amp Design?
  199. THE FINAL AMP
  200. need 6SN7/6H8C reccom. for amp
  201. 211 parallel amp (made in Iran)
  202. Changing to twisted pair heater from one side grounded
  203. Choke input supply. Cap question.
  204. tube rectifier 6AX4GT
  205. RS1003 triode mode Spice models
  206. Firestone 6V6 Monoblock Problems
  207. Lundahl Output transformers?
  208. GMI-6 / GMI-6-1
  209. New power transformer for Millett's DCPP amp,now available at EDCOR
  210. Tuned Circuit?
  211. remote lead for tubes
  212. Building a Stereo EL84 auto bias PP tube amp
  213. Tube conversion of differential to single ended signal
  214. A transconductance tube amplifier
  215. Unknown Tube
  216. 12vdc to 150vac
  217. When is a tube too weak?
  218. The Best Way To Separate L+R and Driver/Output Tube Power Supply ?
  219. Biasing aBerning EA-230
  220. Aikido Noob - Please Help!
  221. Wiring Capacitors in Series
  222. Dynaco ST35 power transformer
  223. Valve Pre > Intergrated amp
  224. Whats the difference RH84 or Mullard 3-3?
  225. Ultra-Linear SE EL84?
  226. Self balancing pp using ccs question
  227. Help: How To Select Schottky Rectifer Diode
  228. 6550 plate resistance in triode mode? Calculate?
  229. making 6sj7 have same gain as 6sl7
  230. Mounting position EL84
  231. Curve Tracer: Which One To Buy, What To Consider, Options ?
  232. 71A Tube Filament: AC or DC ?
  233. My Current Line + Phono Combo
  234. What is better than one audioromy M-828A FU29?
  235. Mazda tube
  236. Aikido selectable gain
  237. Preamp power supply
  238. Has anyone used CV9 tubes in a pp design
  239. 9 pin Vector turret socketsIt seems that Vector turret 9 pin sockets are hard to come
  240. BALANCED AUDIO VK 5 VK20
  241. Output transformer computation
  242. 2E25 Tetrode in Ultra-linear mode...NICE !!!
  243. Input Attenuators
  244. new build SE to EL 508
  245. found this on kickstarter
  246. SE Output Transformer question
  247. Safety of DC-coupled inputs
  248. Found some old tubes.
  249. Presence control
  250. Fixing an amp head - bad tubes?

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