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  1. Pieter's take on an all DHT headphone amplifier.
  2. toroidal chokes
  3. Truly Silly Transformer Question
  4. Elementary resistance question
  5. Russian 310A + 300B
  6. 1959 RCA tube amplifier needs help
  7. What's going on?
  8. Aikido 9-pin All-in-one Testing question
  9. Gyrator in Tail of LTP
  10. tubemaster EL84
  11. Silly transformer question
  12. Marant 8b bias meter
  13. Opera Consonance resitor question ?
  14. ADI's Double Dyna
  15. DuMont Stereo Tube Console late 50's - What to do?
  16. No Sound from Magnavox EL 1484-1 amp/phono
  17. Elevated Heater Question
  18. 6P45S/EL509 input capacitance in triode mode
  19. 6E6p-e Little Tiny Wire
  20. another aikido ?
  21. NOS 6P3S-e or cheap new 5881? Identify this tube..
  22. Contan Audio from Melbourne Aus, any info?
  23. Loctal Base Post
  24. Timber amp with solid copper plate as earth and ground plane
  25. Dynaco ST70 - Which tubes do you like?
  26. 6SL7 in parallel driving 6550
  27. Will this work as a heater for 300b?
  28. Tube grid resistance for 6P45S, fine?
  29. Akido help pls
  30. BEARD P101 information
  31. Got some 6n3c-e (6p3s-e)with blank bulb?
  32. Graaf GM-20
  33. medium power OTL circlotron amplifier
  34. Help me identity this amp
  35. Hajdinjak preamp + 2x mono tube amp -What to do?
  36. Moscode 600 Noisy Fan
  37. component reduction in signal chain
  38. Aikido with Stax
  39. Help need on Xindak XA3200MII hybrid pre-amplifier
  40. ideas for tube burn in / bias match station
  41. KT120 triode operation single stage amp
  42. Question regarding 7199 Tube wiring
  43. Why do modern PP OPTs have 16 Ohm taps?
  44. 10M45 current source
  45. 12bh7 in place of ecc82
  46. High voltage winding no center tap?
  47. Marantz 8b recap
  48. Pair Quad II in all original condition... restore or sell
  49. Where to find tube designers for hire?
  50. 10M45S problem
  51. 300B Load Line and Bias?
  52. Looking for little help with Glassware Janus shunt reg
  53. Quick question about grounding
  54. Source for 6jg5 or equivalent in Europe
  55. Need your help: Change from el34 to 6550 ends in a desaster
  56. conn el 6026 tube amp schematic for hifi stereo
  57. GE 211 "flash" question
  58. Learned something (the hard way) about mica capacitors
  59. Aikido octal floating output
  60. Screened cable for rewiring valve amp
  61. Fault developed, producing static noise
  62. EL34+Ecc83 amp hum
  63. Gold plated Dynaco ST-70 for $3k
  64. Preamp noise level ?
  65. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  66. Rectifier tube cathode and heater
  67. testing voltage on tube filament, without the tube
  68. New semi-custom metal chassis manufacturer
  69. 55 WPC 1625 Mono Block Amps
  70. Masco C-10 Mic/Phono Amp
  71. New driver stage for dynaco mk3
  72. Power Transformer Issue
  73. Marantz 8B
  74. Safety questions
  75. amplifier output impedance measurement
  76. Regulated Vs Non-regulated linear Power Supply
  77. Single RIAA passive eq design for differential DC coupled tube circuit
  78. Amp to Drive Lowther DX3's in Rear Loaded Horn
  79. Anyone know what's going on with Antek?
  80. Sources of 120hz hum?
  81. make adapter from 6n2p to 12ax7
  82. DC coupling with a choke?
  83. help with hum 12ax7 preamp
  84. Signal->crossover->3 amps->speaker
  85. I want to build an inexpensive EL 84 integrated amp with a phono section.
  86. Scott17 KT88 SE Tube Amp Build Log
  87. heater currents
  88. 300B Orientation so logo faces forward
  89. Leak stereo 20
  90. Suggestion: Output tube in SET amp for midbass frequency
  91. Monster Hammond Output XFMRs
  92. 6A3 / 6B4G Design
  93. DC7 MK3 up and running.
  94. Marrantz Model 9 Transformer Buy
  95. 6N2P/6Н2П low plate current increases noise?
  96. first tube amp
  97. rogers cadet 111 or Quad 11
  98. New FM-3 Motherboard
  99. 12ax7(ecc83) and 6n2p 12ax7...........differents??
  100. Heater supply
  101. Very upgraded ST-70 kit/build w/ 6550 tubes
  102. Marantz 8b Electrolytics
  103. How biasing mA in tubes
  104. PSU id and help (psu designer ii)
  105. The all DHT SET Headphone Amp
  106. Assistance with rectifiers in PSUD
  107. Music Angel XD 500 MkII Bias setting
  108. Magnoval
  109. S.E.X. amp plate chokes replacements
  110. Ampex 600 Questions
  111. Antek out of business until April
  112. SE EL34 in triode schematic
  113. Sylvania Console?
  114. Can output transfomers be pick and mixed?
  115. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  116. Preamp Design Review Request
  117. Red Plate Of Doom
  118. LED cathode bias noise issue
  119. PCL86 se amplif.
  120. Is This a good Amplier?
  121. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  122. Contemporary Transformer for Doubler
  123. The volume pot - The hidden villain of preamp
  124. Heathkit EUW-15 Univ. Power Supply (Tube)
  125. diamond cathode tubes
  126. 6146B
  127. ef86 based preamp
  128. 12FQ7 Why and will it be shortage?
  129. Trouble w/ Maida regulator bias supply
  130. impedance calculations
  131. calibrate stark 8-77?
  132. EZLoad Dummy Load
  133. Best kit for a rookie tube builder
  134. schematic question? 805 feedback
  135. 6av5ga distortion spectrum
  136. Single stage line with anode-cathode feedback
  137. VNAV' SUMO Contest 2011
  138. Direct heated triode (dht) cathode bypass: different options
  139. choice of driver for RS 241
  140. Wiring up 3 6.3 Volt Heaters to a 12V supply
  141. Adding LED's to my tubes4hifi sp6 preamp
  142. Stripped down HK A-300
  143. Westrex 2332A amplifiers
  144. Leak st20
  145. Where could I find these sockets???
  146. Hammond L-112
  147. 4-pin tube socket spring clips
  148. Quad FM1 tuner, could be in wrong section
  149. My first tube amp and speaker build I'm loven it
  150. 211 IT amp, battery vs fixed bias
  151. 300B Tube Failure
  152. how to see if a Mullard 12ax7 reissue is long or short plate
  153. Can capacitors, how do they fail?
  154. Long Preamp to Power Amp Cable Lengths
  155. My time at Hovland - HP-100 Lore
  156. hybrid quad design
  157. TooB NooB: Options?
  158. Preamp grounding
  159. Express PCB and POV-ray
  160. Looking for circuit of SE amp. for 4D32
  161. 865 tetrode in triode mode...WOW !
  162. MP-2A preamp
  163. Is a 7 watt per channel amp enough
  164. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  165. Transformers
  166. Pentode curves for GU 50 SE amp with 700V B+
  167. Valve op-amp pre ?
  168. Use only half of OPT secondary?
  169. On/Off cycling
  170. Tube operating points help
  171. OTL Heater Questions
  172. tube output question
  173. RIAA LCR Mythos
  174. first tube amp
  175. M135 retubing and eventual modification
  176. Taylor 211 vs. GE 211
  177. regulated
  178. What should I do with these eico hf-12's?
  179. Dynaco mk3 clone hum issue
  180. First DIY project, which SE tube amp should I build?
  181. 6n11 tube headphone amp
  182. Kt88 Pin alignement problem=did a mistake
  183. LTspice Frustration...help, please..
  184. Bias mods
  185. Maida tracking preregulator?
  186. 230 VAC to 2*140 VAC transformer - 20VA
  187. Re gettering?
  188. Distortion rise on OPT
  189. How to build a transconductance tester for small driver tubes?
  190. Musical Fidelity X-10D Cap Mod
  191. 6N3 & 6E2 tubes.
  192. help with local nfb
  193. What should I build
  194. leak st20
  195. Wright Audio WPA 3.5 Humpot & schematics
  196. the old light bulb trick
  197. Dynaco ST70 KIT - your opinion please
  198. Wire for tubes using a plate cap?
  199. Lundahl LL1660 OPT Franks 6SN7 linestage
  200. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  201. Tomiko 10k PP transformer?
  202. Powerdrive for higher grid wattage A2 transmitter tubes
  203. Marantz Model 5 Amps and Model Seven Preamp
  204. How to calculate output transformers
  205. Grounding considerations with external PS
  206. Cathodyne fet buffered balanced line out
  207. 807pp + input phase splitter
  208. leak st 20
  209. Does anyone know what this is!..???
  210. Thought Exercise: Submini Circlotron OTL Amp
  211. Preamp Grounding PCB
  212. Manley 440: Tubes red cherry after replacing old tubes with new ones
  213. EL95 Parallel Push Pull design
  214. What is the ideal low-noise heater power for high-power output tubes?
  215. Beijing 6N6T
  216. Tube recomedations for my first tube amp
  217. Tube Load Lines and B+
  218. Hybrid rectifier possible in PSUD?
  219. Bias voltage slower to come up
  220. Can You Reccommend a 6922 tube?
  221. Miniblok Resistor Parameter Modulation using Pots
  222. gm70 driver tube tests
  223. 300B Globe physical dimensions
  224. DIY Fisher 800b into a mic pre
  225. OPT Modification Question-Help please?
  226. Cant find origin
  227. Fixing Sneaky Oscillation in P-P Amplifiers
  228. fu-29 Audioromy
  229. Almarro A205A as experimentation platform
  230. Thoughts on layout and potential for improvements
  231. What is the difference between "rectifier tubes" and "power tubes"
  232. uTracer...
  233. EL84/UL84 single valve amp
  234. Mic preamp - strange high frequency roll off problem
  235. Tissbury audio
  236. midification to srpp preamplifier input voltage
  237. DHT SE amp with ultrapath
  238. Tube mic preamp problem
  239. Output transformer: reasons for destruction?
  240. Bewitch KT88
  241. SE OPT Wiring
  242. Budget 300b tubes recommendations
  243. Hum problem through one channel
  244. Audio Research LS22 DIY
  245. 300V Tube Power Supply From 120VAC Without Rectifier?
  246. NOS Tube: Black Spot on Getter Flashing? Help
  247. FET Source Follower Distortion
  248. TUBE/MOSFET/BJT hibrid amp
  249. PYE Black Box amplifier
  250. what OPT for 211 parallel SE amp?

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