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

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