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  1. Re-caping Cayin A70-T
  2. A3 attenuator help for an Aikido line amp
  3. Driver Tube Power Supply Question ?
  4. Line Stage vs. Phase Inverter - 12A*7
  5. Intermittent Buzz Decware Zen SE84Bged
  6. Tamura F2011/el34 x 4
  7. E88CC/6922 battery supply
  8. Aikido 9-pin all-in-1 headphone amp problem
  9. Filament Transformer Question ?
  10. Load Resistance, etc., chart for Class A push pull 6L6s?
  11. Question about preamp, boost and line-stage
  12. help please
  13. Practical phase inverter article
  14. Tube vs. Jfet Preamp for Dynaco ST-35 tube power amp
  15. Rio W-41 no sound
  16. Help: TDA1541A DAC Output To Tube Gainstage
  17. Pieter's take on an all DHT headphone amplifier.
  18. toroidal chokes
  19. Truly Silly Transformer Question
  20. Elementary resistance question
  21. Russian 310A + 300B
  22. 1959 RCA tube amplifier needs help
  23. What's going on?
  24. Aikido 9-pin All-in-one Testing question
  25. Gyrator in Tail of LTP
  26. tubemaster EL84
  27. Silly transformer question
  28. Marant 8b bias meter
  29. ElectroTone OrganMate spring reverb - mod suggestions?
  30. Opera Consonance resitor question ?
  31. ADI's Double Dyna
  32. DuMont Stereo Tube Console late 50's - What to do?
  33. No Sound from Magnavox EL 1484-1 amp/phono
  34. Elevated Heater Question
  35. 6P45S/EL509 input capacitance in triode mode
  36. 6E6p-e Little Tiny Wire
  37. another aikido ?
  38. NOS 6P3S-e or cheap new 5881? Identify this tube..
  39. Contan Audio from Melbourne Aus, any info?
  40. Loctal Base Post
  41. Timber amp with solid copper plate as earth and ground plane
  42. Dynaco ST70 - Which tubes do you like?
  43. 6SL7 in parallel driving 6550
  44. Will this work as a heater for 300b?
  45. Tube grid resistance for 6P45S, fine?
  46. Akido help pls
  47. BEARD P101 information
  48. Got some 6n3c-e (6p3s-e)with blank bulb?
  49. Graaf GM-20
  50. medium power OTL circlotron amplifier
  51. Help me identity this amp
  52. Hajdinjak preamp + 2x mono tube amp -What to do?
  53. Moscode 600 Noisy Fan
  54. component reduction in signal chain
  55. Aikido with Stax
  56. 'High power' shunt regulator
  57. Help need on Xindak XA3200MII hybrid pre-amplifier
  58. ideas for tube burn in / bias match station
  59. KT120 triode operation single stage amp
  60. Question regarding 7199 Tube wiring
  61. Why do modern PP OPTs have 16 Ohm taps?
  62. 10M45 current source
  63. 12bh7 in place of ecc82
  64. High voltage winding no center tap?
  65. Marantz 8b recap
  66. Pair Quad II in all original condition... restore or sell
  67. Where to find tube designers for hire?
  68. 10M45S problem
  69. 300B Load Line and Bias?
  70. Looking for little help with Glassware Janus shunt reg
  71. Quick question about grounding
  72. Source for 6jg5 or equivalent in Europe
  73. Need your help: Change from el34 to 6550 ends in a desaster
  74. conn el 6026 tube amp schematic for hifi stereo
  75. GE 211 "flash" question
  76. Learned something (the hard way) about mica capacitors
  77. Aikido octal floating output
  78. Screened cable for rewiring valve amp
  79. Fault developed, producing static noise
  80. Tubelab SE buzz and crackle
  81. EL34+Ecc83 amp hum
  82. Gold plated Dynaco ST-70 for $3k
  83. Preamp noise level ?
  84. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  85. Rectifier tube cathode and heater
  86. testing voltage on tube filament, without the tube
  87. New semi-custom metal chassis manufacturer
  88. 55 WPC 1625 Mono Block Amps
  89. Masco C-10 Mic/Phono Amp
  90. New driver stage for dynaco mk3
  91. Power Transformer Issue
  92. Marantz 8B
  93. Safety questions
  94. Step Attenuator
  95. amplifier output impedance measurement
  96. Regulated Vs Non-regulated linear Power Supply
  97. Single RIAA passive eq design for differential DC coupled tube circuit
  98. Amp to Drive Lowther DX3's in Rear Loaded Horn
  99. Anyone know what's going on with Antek?
  100. Sources of 120hz hum?
  101. make adapter from 6n2p to 12ax7
  102. DC coupling with a choke?
  103. help with hum 12ax7 preamp
  104. Signal->crossover->3 amps->speaker
  105. I want to build an inexpensive EL 84 integrated amp with a phono section.
  106. Scott17 KT88 SE Tube Amp Build Log
  107. heater currents
  108. 300B Orientation so logo faces forward
  109. Leak stereo 20
  110. Suggestion: Output tube in SET amp for midbass frequency
  111. Monster Hammond Output XFMRs
  112. 6A3 / 6B4G Design
  113. DC7 MK3 up and running.
  114. Marrantz Model 9 Transformer Buy
  115. 6N2P/6Н2П low plate current increases noise?
  116. first tube amp
  117. rogers cadet 111 or Quad 11
  118. New FM-3 Motherboard
  119. 12ax7(ecc83) and 6n2p 12ax7...........differents??
  120. Heater supply
  121. Very upgraded ST-70 kit/build w/ 6550 tubes
  122. Marantz 8b Electrolytics
  123. How biasing mA in tubes
  124. PSU id and help (psu designer ii)
  125. The all DHT SET Headphone Amp
  126. Assistance with rectifiers in PSUD
  127. Music Angel XD 500 MkII Bias setting
  128. Magnoval
  129. S.E.X. amp plate chokes replacements
  130. Ampex 600 Questions
  131. Antek out of business until April
  132. SE EL34 in triode schematic
  133. Sylvania Console?
  134. Can output transfomers be pick and mixed?
  135. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  136. Preamp Design Review Request
  137. Red Plate Of Doom
  138. LED cathode bias noise issue
  139. PCL86 se amplif.
  140. Is This a good Amplier?
  141. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  142. Contemporary Transformer for Doubler
  143. The volume pot - The hidden villain of preamp
  144. Heathkit EUW-15 Univ. Power Supply (Tube)
  145. diamond cathode tubes
  146. 6146B
  147. ef86 based preamp
  148. 12FQ7 Why and will it be shortage?
  149. Trouble w/ Maida regulator bias supply
  150. impedance calculations
  151. calibrate stark 8-77?
  152. EZLoad Dummy Load
  153. Best kit for a rookie tube builder
  154. schematic question? 805 feedback
  155. 6av5ga distortion spectrum
  156. Single stage line with anode-cathode feedback
  157. VNAV' SUMO Contest 2011
  158. Direct heated triode (dht) cathode bypass: different options
  159. choice of driver for RS 241
  160. Wiring up 3 6.3 Volt Heaters to a 12V supply
  161. Adding LED's to my tubes4hifi sp6 preamp
  162. Stripped down HK A-300
  163. Westrex 2332A amplifiers
  164. Leak st20
  165. Where could I find these sockets???
  166. Hammond L-112
  167. 4-pin tube socket spring clips
  168. Quad FM1 tuner, could be in wrong section
  169. My first tube amp and speaker build I'm loven it
  170. 211 IT amp, battery vs fixed bias
  171. 300B Tube Failure
  172. how to see if a Mullard 12ax7 reissue is long or short plate
  173. Can capacitors, how do they fail?
  174. Long Preamp to Power Amp Cable Lengths
  175. My time at Hovland - HP-100 Lore
  176. hybrid quad design
  177. TooB NooB: Options?
  178. Preamp grounding
  179. Express PCB and POV-ray
  180. Looking for circuit of SE amp. for 4D32
  181. 865 tetrode in triode mode...WOW !
  182. MP-2A preamp
  183. Is a 7 watt per channel amp enough
  184. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  185. Transformers
  186. Pentode curves for GU 50 SE amp with 700V B+
  187. Valve op-amp pre ?
  188. Use only half of OPT secondary?
  189. On/Off cycling
  190. Tube operating points help
  191. OTL Heater Questions
  192. tube output question
  193. RIAA LCR Mythos
  194. first tube amp
  195. M135 retubing and eventual modification
  196. Taylor 211 vs. GE 211
  197. regulated
  198. What should I do with these eico hf-12's?
  199. Dynaco mk3 clone hum issue
  200. First DIY project, which SE tube amp should I build?
  201. 6n11 tube headphone amp
  202. Kt88 Pin alignement problem=did a mistake
  203. LTspice Frustration...help, please..
  204. Bias mods
  205. Maida tracking preregulator?
  206. 230 VAC to 2*140 VAC transformer - 20VA
  207. Re gettering?
  208. Distortion rise on OPT
  209. How to build a transconductance tester for small driver tubes?
  210. Musical Fidelity X-10D Cap Mod
  211. 6N3 & 6E2 tubes.
  212. help with local nfb
  213. What should I build
  214. leak st20
  215. Wright Audio WPA 3.5 Humpot & schematics
  216. the old light bulb trick
  217. Dynaco ST70 KIT - your opinion please
  218. Wire for tubes using a plate cap?
  219. Lundahl LL1660 OPT Franks 6SN7 linestage
  220. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  221. Tomiko 10k PP transformer?
  222. Powerdrive for higher grid wattage A2 transmitter tubes
  223. Marantz Model 5 Amps and Model Seven Preamp
  224. How to calculate output transformers
  225. Grounding considerations with external PS
  226. Cathodyne fet buffered balanced line out
  227. 807pp + input phase splitter
  228. leak st 20
  229. Questions about Champ mods, NF loop and more
  230. Does anyone know what this is!..???
  231. Thought Exercise: Submini Circlotron OTL Amp
  232. Preamp Grounding PCB
  233. Manley 440: Tubes red cherry after replacing old tubes with new ones
  234. EL95 Parallel Push Pull design
  235. What is the ideal low-noise heater power for high-power output tubes?
  236. Beijing 6N6T
  237. Tube recomedations for my first tube amp
  238. Tube Load Lines and B+
  239. Hybrid rectifier possible in PSUD?
  240. Hickok calibration
  241. Bias voltage slower to come up
  242. Can You Reccommend a 6922 tube?
  243. Miniblok Resistor Parameter Modulation using Pots
  244. gm70 driver tube tests
  245. 300B Globe physical dimensions
  246. DIY Fisher 800b into a mic pre
  247. OPT Modification Question-Help please?
  248. Cant find origin
  249. Fixing Sneaky Oscillation in P-P Amplifiers
  250. fu-29 Audioromy

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