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

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