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

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