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  1. Load Resistance, etc., chart for Class A push pull 6L6s?
  2. Question about preamp, boost and line-stage
  3. help please
  4. Practical phase inverter article
  5. Tube vs. Jfet Preamp for Dynaco ST-35 tube power amp
  6. Rio W-41 no sound
  7. Help: TDA1541A DAC Output To Tube Gainstage
  8. Pieter's take on an all DHT headphone amplifier.
  9. toroidal chokes
  10. Truly Silly Transformer Question
  11. Elementary resistance question
  12. Russian 310A + 300B
  13. 1959 RCA tube amplifier needs help
  14. What's going on?
  15. Aikido 9-pin All-in-one Testing question
  16. Gyrator in Tail of LTP
  17. tubemaster EL84
  18. Silly transformer question
  19. Marant 8b bias meter
  20. Opera Consonance resitor question ?
  21. ADI's Double Dyna
  22. DuMont Stereo Tube Console late 50's - What to do?
  23. No Sound from Magnavox EL 1484-1 amp/phono
  24. Elevated Heater Question
  25. 6P45S/EL509 input capacitance in triode mode
  26. 6E6p-e Little Tiny Wire
  27. another aikido ?
  28. NOS 6P3S-e or cheap new 5881? Identify this tube..
  29. Contan Audio from Melbourne Aus, any info?
  30. Loctal Base Post
  31. Timber amp with solid copper plate as earth and ground plane
  32. Dynaco ST70 - Which tubes do you like?
  33. 6SL7 in parallel driving 6550
  34. Will this work as a heater for 300b?
  35. Tube grid resistance for 6P45S, fine?
  36. Akido help pls
  37. BEARD P101 information
  38. Got some 6n3c-e (6p3s-e)with blank bulb?
  39. Graaf GM-20
  40. medium power OTL circlotron amplifier
  41. Help me identity this amp
  42. Hajdinjak preamp + 2x mono tube amp -What to do?
  43. Moscode 600 Noisy Fan
  44. component reduction in signal chain
  45. Aikido with Stax
  46. Help need on Xindak XA3200MII hybrid pre-amplifier
  47. ideas for tube burn in / bias match station
  48. KT120 triode operation single stage amp
  49. Question regarding 7199 Tube wiring
  50. Why do modern PP OPTs have 16 Ohm taps?
  51. 10M45 current source
  52. 12bh7 in place of ecc82
  53. High voltage winding no center tap?
  54. Marantz 8b recap
  55. Pair Quad II in all original condition... restore or sell
  56. Where to find tube designers for hire?
  57. 10M45S problem
  58. 300B Load Line and Bias?
  59. Looking for little help with Glassware Janus shunt reg
  60. Quick question about grounding
  61. Source for 6jg5 or equivalent in Europe
  62. Need your help: Change from el34 to 6550 ends in a desaster
  63. conn el 6026 tube amp schematic for hifi stereo
  64. GE 211 "flash" question
  65. Learned something (the hard way) about mica capacitors
  66. Aikido octal floating output
  67. Screened cable for rewiring valve amp
  68. Fault developed, producing static noise
  69. Tubelab SE buzz and crackle
  70. EL34+Ecc83 amp hum
  71. Gold plated Dynaco ST-70 for $3k
  72. Preamp noise level ?
  73. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  74. Rectifier tube cathode and heater
  75. testing voltage on tube filament, without the tube
  76. New semi-custom metal chassis manufacturer
  77. 55 WPC 1625 Mono Block Amps
  78. Masco C-10 Mic/Phono Amp
  79. New driver stage for dynaco mk3
  80. Power Transformer Issue
  81. Marantz 8B
  82. Safety questions
  83. Step Attenuator
  84. amplifier output impedance measurement
  85. Regulated Vs Non-regulated linear Power Supply
  86. Single RIAA passive eq design for differential DC coupled tube circuit
  87. Amp to Drive Lowther DX3's in Rear Loaded Horn
  88. Anyone know what's going on with Antek?
  89. Sources of 120hz hum?
  90. make adapter from 6n2p to 12ax7
  91. DC coupling with a choke?
  92. help with hum 12ax7 preamp
  93. Signal->crossover->3 amps->speaker
  94. I want to build an inexpensive EL 84 integrated amp with a phono section.
  95. Scott17 KT88 SE Tube Amp Build Log
  96. heater currents
  97. 300B Orientation so logo faces forward
  98. Leak stereo 20
  99. Suggestion: Output tube in SET amp for midbass frequency
  100. Monster Hammond Output XFMRs
  101. 6A3 / 6B4G Design
  102. DC7 MK3 up and running.
  103. Marrantz Model 9 Transformer Buy
  104. 6N2P/6Н2П low plate current increases noise?
  105. first tube amp
  106. rogers cadet 111 or Quad 11
  107. New FM-3 Motherboard
  108. 12ax7(ecc83) and 6n2p 12ax7...........differents??
  109. Heater supply
  110. Very upgraded ST-70 kit/build w/ 6550 tubes
  111. Marantz 8b Electrolytics
  112. How biasing mA in tubes
  113. PSU id and help (psu designer ii)
  114. The all DHT SET Headphone Amp
  115. Assistance with rectifiers in PSUD
  116. Music Angel XD 500 MkII Bias setting
  117. Magnoval
  118. S.E.X. amp plate chokes replacements
  119. Ampex 600 Questions
  120. Antek out of business until April
  121. SE EL34 in triode schematic
  122. Sylvania Console?
  123. Can output transfomers be pick and mixed?
  124. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  125. Preamp Design Review Request
  126. Red Plate Of Doom
  127. LED cathode bias noise issue
  128. PCL86 se amplif.
  129. Is This a good Amplier?
  130. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  131. Contemporary Transformer for Doubler
  132. The volume pot - The hidden villain of preamp
  133. Heathkit EUW-15 Univ. Power Supply (Tube)
  134. diamond cathode tubes
  135. 6146B
  136. ef86 based preamp
  137. 12FQ7 Why and will it be shortage?
  138. Trouble w/ Maida regulator bias supply
  139. impedance calculations
  140. calibrate stark 8-77?
  141. EZLoad Dummy Load
  142. Best kit for a rookie tube builder
  143. schematic question? 805 feedback
  144. 6av5ga distortion spectrum
  145. Single stage line with anode-cathode feedback
  146. VNAV' SUMO Contest 2011
  147. Direct heated triode (dht) cathode bypass: different options
  148. choice of driver for RS 241
  149. Wiring up 3 6.3 Volt Heaters to a 12V supply
  150. Adding LED's to my tubes4hifi sp6 preamp
  151. Stripped down HK A-300
  152. Westrex 2332A amplifiers
  153. Leak st20
  154. Where could I find these sockets???
  155. Hammond L-112
  156. 4-pin tube socket spring clips
  157. Quad FM1 tuner, could be in wrong section
  158. My first tube amp and speaker build I'm loven it
  159. 211 IT amp, battery vs fixed bias
  160. 300B Tube Failure
  161. how to see if a Mullard 12ax7 reissue is long or short plate
  162. Can capacitors, how do they fail?
  163. Long Preamp to Power Amp Cable Lengths
  164. My time at Hovland - HP-100 Lore
  165. hybrid quad design
  166. TooB NooB: Options?
  167. Preamp grounding
  168. Express PCB and POV-ray
  169. Looking for circuit of SE amp. for 4D32
  170. 865 tetrode in triode mode...WOW !
  171. MP-2A preamp
  172. Is a 7 watt per channel amp enough
  173. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  174. Transformers
  175. Pentode curves for GU 50 SE amp with 700V B+
  176. Valve op-amp pre ?
  177. Use only half of OPT secondary?
  178. On/Off cycling
  179. Tube operating points help
  180. OTL Heater Questions
  181. tube output question
  182. RIAA LCR Mythos
  183. first tube amp
  184. M135 retubing and eventual modification
  185. Taylor 211 vs. GE 211
  186. regulated
  187. What should I do with these eico hf-12's?
  188. Dynaco mk3 clone hum issue
  189. First DIY project, which SE tube amp should I build?
  190. 6n11 tube headphone amp
  191. Kt88 Pin alignement problem=did a mistake
  192. LTspice Frustration...help, please..
  193. Bias mods
  194. Maida tracking preregulator?
  195. 230 VAC to 2*140 VAC transformer - 20VA
  196. Re gettering?
  197. Distortion rise on OPT
  198. How to build a transconductance tester for small driver tubes?
  199. Musical Fidelity X-10D Cap Mod
  200. 6N3 & 6E2 tubes.
  201. help with local nfb
  202. What should I build
  203. leak st20
  204. Wright Audio WPA 3.5 Humpot & schematics
  205. the old light bulb trick
  206. Dynaco ST70 KIT - your opinion please
  207. Wire for tubes using a plate cap?
  208. Lundahl LL1660 OPT Franks 6SN7 linestage
  209. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  210. Tomiko 10k PP transformer?
  211. Powerdrive for higher grid wattage A2 transmitter tubes
  212. Marantz Model 5 Amps and Model Seven Preamp
  213. How to calculate output transformers
  214. Grounding considerations with external PS
  215. Cathodyne fet buffered balanced line out
  216. 807pp + input phase splitter
  217. leak st 20
  218. Does anyone know what this is!..???
  219. Thought Exercise: Submini Circlotron OTL Amp
  220. Preamp Grounding PCB
  221. Manley 440: Tubes red cherry after replacing old tubes with new ones
  222. EL95 Parallel Push Pull design
  223. What is the ideal low-noise heater power for high-power output tubes?
  224. Beijing 6N6T
  225. Tube recomedations for my first tube amp
  226. Tube Load Lines and B+
  227. Hybrid rectifier possible in PSUD?
  228. Hickok calibration
  229. Bias voltage slower to come up
  230. Can You Reccommend a 6922 tube?
  231. Miniblok Resistor Parameter Modulation using Pots
  232. gm70 driver tube tests
  233. 300B Globe physical dimensions
  234. DIY Fisher 800b into a mic pre
  235. OPT Modification Question-Help please?
  236. Cant find origin
  237. Fixing Sneaky Oscillation in P-P Amplifiers
  238. fu-29 Audioromy
  239. Almarro A205A as experimentation platform
  240. Thoughts on layout and potential for improvements
  241. What is the difference between "rectifier tubes" and "power tubes"
  242. uTracer...
  243. EL84/UL84 single valve amp
  244. Mic preamp - strange high frequency roll off problem
  245. Tissbury audio
  246. midification to srpp preamplifier input voltage
  247. DHT SE amp with ultrapath
  248. Tube mic preamp problem
  249. Output transformer: reasons for destruction?
  250. Bewitch KT88

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