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  1. heater imbalance fixable?
  2. Headphone amp
  3. Speech Amp for Modulator
  4. 2.1 channel el84 amp help
  5. Identify PC board in little amp...
  6. dcpp vs sse vs spp? First build
  7. Spice model for GU50 (LT-Spice)
  8. Need schematic of Preamplifier AM 1065
  9. My Journey to build Tube power amplifier B300 SE
  10. Kondo M77
  11. tube datasheet gm
  12. xiang sheng best valves
  13. 6CN6/EL38 Replacement
  14. 4P55
  15. Possible or way to complicated?
  16. Jeff korneff SET 45
  17. Hickok 536 Calibration Procedure?
  18. P2p layout
  19. Heating tubes off mains voltage
  20. EL84 as preamp tube?
  21. Claus Byrith 4-30 PP with KT66
  22. biasing confusion
  23. Bogen HE-10 question
  24. Golden Tube Audio SE-100
  25. Nearing Conclusion of Line/Phono Project
  26. Bias Supply For Citation V?
  27. Tube Integrated Amp
  28. Help needed about a quad FM2 RF
  29. 21jv6 tube datasheet
  30. Interstage transformer theoretical phase change?
  31. Bootstrapping a high pass filter
  32. Help with hybrid Aikido amp! Suggestions please
  33. Need help with a Curcio Daniel 1
  34. Audio Tubes used in Industrial equipment?
  35. Hammond H1 Amp
  36. CCS assisted small signal UL pentode
  37. Vox AC50 output transformer rewind
  38. Dynaco ST35 B+
  39. Simple Tube Amp
  40. Portable tube amplifier
  41. Using the heater supply to get a DC source
  42. phono/aux switching problem
  43. What is the best EF86 in production at the moment
  44. 12AX7 / 12AT7 Mu Follower Phono
  45. Kreisler Stereo 6 speaker impedance
  46. A serviceable life.....
  47. TV 7 DU Tube info
  48. Twinings Tea Transformer Covers
  49. ECC88 with 12V heaters
  50. CXhange opa 627ap for an audio gd moon ?
  51. PP-EL34/6550/EL-PL504 or KT88 Bal. innput
  52. fatman itube mk1 sounds bad
  53. Chinese FD-71 tube is the russian GK-71 ?
  54. Leak stereo 20 diagnosis
  55. VTL
  56. Looking for tubed MC pre-pre
  57. Correct wiring types
  58. Couplates
  59. Op-Amp Like Line Preamp
  60. SE GU-50/6CB6 Pentode Design
  61. Pioneer SX34
  62. About metal film resistor in a tube tuner
  63. Looking for 52dBs or more MM phono
  64. Winter is coming... Time to start GM70 SE parafeed amp
  65. Doug Self: Wireless World Magazine Article Archive
  66. Relay short circuit
  67. EL34 PP oscillating
  68. Dynaco switchable diode/tube rec and driver tube mode
  69. CCS into a VR with Interstage question
  70. 6SN7-6V6x2 DC coupled 2 stage with stacked supplies
  71. Rectifier and DC filtering relationship question
  72. Class A2 6JD5 Curves
  73. Motorola HS-839 Amp problem
  74. Active valve monitors?
  75. Did I get this load calculation right?
  76. Convergent SL1 original schematic
  77. Bleed down resistor
  78. How do I calculate resistor value in this schematic?
  79. Easy question about tube data sheet
  80. Tube regulator question
  81. Tube amp build for an 1st timer.
  82. Full music 101d input tube/valve
  83. EZ80 Voltage Question
  84. What the heck is this? Bulb?
  85. Audio Note Kit 1 Upgrade
  86. Will this work? (EL34 PP)
  87. Anthem 1 intergrated amp
  88. Tubes and the sun?
  89. Two triodes cascaded cathode follower?
  90. HIRAGA PREAMP PHONO + line
  91. OB2WA Radioactive???
  92. 9 pin tube socket pcb boards with screw terminals
  93. Hai I need a little help on designing a power supply
  94. Tesla E83CC Frame Grid Tube Purchase - Legitimate Production or Fakes?
  95. Cleaning Up the Noise + Selector Switch Anomalie
  96. first tube preamp
  97. Rescuing a vessel : 1964 HICKOK 539C tube tester
  98. Dynaco Feedback
  99. Mundorf Silver Oil in hot 300B tube amplifier !!
  100. MULLARD 5-20 build with mods
  101. Choke loaded driver with small opt?
  102. Preamp Tube Bias and feedback
  103. Capacitor replacement option
  104. New EL84 SE Amp PCB: The u-SE
  105. Question about Amp Theory
  106. Help needed for modifying DAC-opamp-tube circuit
  107. best way to start with tube amps
  108. Damper diode between C1 and L1
  109. Question about 'near' zero volt bias for low level stages
  110. Filmosound 179 - Should I even bother?
  111. Newbie question
  112. I think I know how it works, but can I get some help? (OddWatt PP)
  113. kt150
  114. As anyone considered black oxide???
  115. OTL question
  116. Headphone amp/preamp project.
  117. Comments or suggestions on this schematic?
  118. Twin Conn Organ 7868 Rebuild
  119. Favorite PP 6550 schematic?
  120. DECWARE Z BOX SCHEMATIC
  121. 6V6
  122. Need suggestion for eliminating noise from aluminum cover
  123. Kuba Serenade Stereo Console question.
  124. Help with tube interchangeability
  125. 6sn7(12au7)-6v6-300b
  126. Westinghouse tube amp MODEL V2508, conversion
  127. Voltage on the chassis, bad xformer?
  128. TubeCad blues...
  129. OPT as PSU filter???
  130. Tube Plate Voltage Timing
  131. Transformer grounding
  132. Two questions concerning bleed resistors
  133. Choke ratings and resistor values in choke input supply?
  134. Novar Spud :: A $200 sweep tube Spud with PCB
  135. Mid 50s 250/500/1000W Valve amp needs some repairs......
  136. I want to learn tubes and set up a workstation
  137. Pre amp wire up__new
  138. allied knight / rauland borg schematic needed
  139. Rollable Tubes
  140. n00b - Leave out the LEDs??
  141. Aikido 5687 all in one kit
  142. 6P13S - WHAT TO DO WITH
  143. el84 set amp for 90db-8ohm speaker?
  144. My first cap coupled 2 stage
  145. Dodd Buffer Tube Rolling?
  146. Lowest THD Tube Design Possible? (Need for a class, I realize it doesn't matter)
  147. Olson-Morgan 6F6 Amplifier Info's needed.
  148. Newbie, Help with datasheet
  149. Conrad Johnson MV55 again - and Hi from a newb
  150. Interesting one piece EL34 PP tube amp diy pcb on ebay
  151. Low power stereo (dual mono) tube headphone amp
  152. 6EJ7's vs. 6JC6A
  153. EL34s Frying in my Cayin A50-T
  154. Grid Leak Amplifier with Unexpected Heater Resistor
  155. 7617 tube data
  156. preamplifier with huge amplification
  157. Counterpoint Amp Output
  158. Phase inverter Gremlins in Philips EL6431 amp
  159. Russian to English Translation needed
  160. Concertina type Phase inverters?
  161. Double C-Core output transformers
  162. Amplifier slew rate and DSD playback
  163. Bypassing volume pot on Cayin integrated tube amp
  164. Distortion when change into ecc83
  165. Mighty Midget Problem (One channel is louder)
  166. Mullard ECL86 3W Economical Amplifier
  167. Building a Baby Huey EL84 amp - might need some pointers
  168. Tranformer Choice
  169. Heathkit WM-5
  170. Aikido preamp power supply
  171. identify this traffo
  172. transformers
  173. parallel tube amplifier.
  174. What to do with a 12" x 8" enclosure?
  175. Odd filament winding
  176. transformers
  177. tube choices for an ST70
  178. "Arabella" - 6EM7 amplifier on Acacia
  179. CDE acquisition of Orange Drop Brand
  180. What is this inductor?
  181. Counterpoint SA-5000 upgrade
  182. Homebrew tube preamp noise
  183. Cathode follower with 12ax7
  184. CPC Japanese Tubes ?
  185. Cary SLA-70 with KT88 - worth building?
  186. Opinions or comments on schematic please
  187. Is this a tie point or a diode?
  188. Need Pinout Help, Silvertone Organ Amp
  189. Pushing EL36 ??
  190. Power Supply Chokes Question ?
  191. First Post, Viking/T Eaton co Tube Amp Issues! *Pictures*
  192. Knight 40 W Amp. tubes correct? Location?
  193. Push-Pull Output Transformer with Cathode Feedback Winding?
  194. 300b amp help
  195. Help with Dynaco value
  196. INTERSTAGE 2A3/211
  197. TCJ Push Pull Amp Calculator question
  198. winter project KT88 PP
  199. En Vogue Darling SRPP SE SRPP tube amp will this work?
  200. Shunt regulation for HT
  201. Unison research simply two, what gridvoltage for EL34?
  202. Finally Measured my Tube Preamp
  203. Aikido octal stereo problems
  204. Philips 5 pin IEC connector in AG9016
  205. Dynaclone OPT replacement - less power than expected
  206. 2 ECL 805 SE
  207. All DHT headphone amp with 4P1L & 307A
  208. cary audio rocket 88 tube amp
  209. Compactron Driver Dynaco MarkIII PCB Design.
  210. Paralelling pentodes ?
  211. KT120 Single Ended Ultralinear
  212. Does a PCL805 glow red at its maximum rating?
  213. V1 Noise Reduction Choices
  214. full pentode ppp
  215. Input transformer question
  216. Is this Tesla ECC803S real or fake?
  217. Michaelson and Austin TVA-1
  218. EN VOGUE DARLING SRPP SE PARALLEL 1626 REVIEW NEEDED
  219. 6EB8\6GN8 P-P Output 2*12w Class-B
  220. B+ regulator for KT88 amplifier
  221. Help figuring out wind/hiss
  222. 12A07 low voltage preamp
  223. Buying guideline for 6c33c
  224. New 211/VT4c shootout
  225. GM70 Output transformer
  226. OTL 2013
  227. Octal Preamp Triode Thoughts (IDHT's)
  228. Wrong tube and pin wiring
  229. New Production Tube If Transformers from Germany
  230. Vishay TX2575 resistor placement
  231. Direct connected madness
  232. RH84 build & quite a few questions...
  233. Tube preamp kits
  234. Capacitor query L1 audio innovation pre-amp
  235. Someone Told Me This Wouldn't Work?
  236. How to "do" a FM Multipath Monitor
  237. EF86 pins 2 & 7
  238. Welborne 300B DRD amp
  239. My First Tube Project: 6N16B
  240. Triode mod with G2, G3 connect to anode
  241. Valve mic cable diy
  242. Toroidal transformer is bad
  243. Coupling caps suggestions
  244. EABC80 and the double diode triode?
  245. Frequent Question -Golden Tube Audio 300B monos schematic??
  246. Transformer Terminal Designators
  247. Slew rate limiting in output stage
  248. Sonic Frontiers Line 2 - no line level output
  249. KT88 Ultralinear?
  250. Help with 12AT7 CCDA - EL34 SE Amp Design?

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