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  1. Silly transformer question
  2. Marant 8b bias meter
  3. ElectroTone OrganMate spring reverb - mod suggestions?
  4. Opera Consonance resitor question ?
  5. ADI's Double Dyna
  6. DuMont Stereo Tube Console late 50's - What to do?
  7. No Sound from Magnavox EL 1484-1 amp/phono
  8. Elevated Heater Question
  9. 6P45S/EL509 input capacitance in triode mode
  10. 6E6p-e Little Tiny Wire
  11. another aikido ?
  12. NOS 6P3S-e or cheap new 5881? Identify this tube..
  13. Contan Audio from Melbourne Aus, any info?
  14. Loctal Base Post
  15. Timber amp with solid copper plate as earth and ground plane
  16. Dynaco ST70 - Which tubes do you like?
  17. 6SL7 in parallel driving 6550
  18. Will this work as a heater for 300b?
  19. Tube grid resistance for 6P45S, fine?
  20. Akido help pls
  21. BEARD P101 information
  22. Got some 6n3c-e (6p3s-e)with blank bulb?
  23. Graaf GM-20
  24. medium power OTL circlotron amplifier
  25. Help me identity this amp
  26. Hajdinjak preamp + 2x mono tube amp -What to do?
  27. Moscode 600 Noisy Fan
  28. component reduction in signal chain
  29. Aikido with Stax
  30. 'High power' shunt regulator
  31. Help need on Xindak XA3200MII hybrid pre-amplifier
  32. ideas for tube burn in / bias match station
  33. KT120 triode operation single stage amp
  34. Question regarding 7199 Tube wiring
  35. Why do modern PP OPTs have 16 Ohm taps?
  36. 10M45 current source
  37. 12bh7 in place of ecc82
  38. High voltage winding no center tap?
  39. Marantz 8b recap
  40. Pair Quad II in all original condition... restore or sell
  41. Where to find tube designers for hire?
  42. 10M45S problem
  43. 300B Load Line and Bias?
  44. Looking for little help with Glassware Janus shunt reg
  45. Quick question about grounding
  46. Source for 6jg5 or equivalent in Europe
  47. Need your help: Change from el34 to 6550 ends in a desaster
  48. conn el 6026 tube amp schematic for hifi stereo
  49. GE 211 "flash" question
  50. Learned something (the hard way) about mica capacitors
  51. Aikido octal floating output
  52. Screened cable for rewiring valve amp
  53. Fault developed, producing static noise
  54. Tubelab SE buzz and crackle
  55. EL34+Ecc83 amp hum
  56. Gold plated Dynaco ST-70 for $3k
  57. Preamp noise level ?
  58. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  59. Rectifier tube cathode and heater
  60. testing voltage on tube filament, without the tube
  61. New semi-custom metal chassis manufacturer
  62. 55 WPC 1625 Mono Block Amps
  63. Masco C-10 Mic/Phono Amp
  64. New driver stage for dynaco mk3
  65. Power Transformer Issue
  66. Marantz 8B
  67. Safety questions
  68. Step Attenuator
  69. amplifier output impedance measurement
  70. Regulated Vs Non-regulated linear Power Supply
  71. Single RIAA passive eq design for differential DC coupled tube circuit
  72. Amp to Drive Lowther DX3's in Rear Loaded Horn
  73. Anyone know what's going on with Antek?
  74. Sources of 120hz hum?
  75. make adapter from 6n2p to 12ax7
  76. DC coupling with a choke?
  77. help with hum 12ax7 preamp
  78. Signal->crossover->3 amps->speaker
  79. I want to build an inexpensive EL 84 integrated amp with a phono section.
  80. Scott17 KT88 SE Tube Amp Build Log
  81. heater currents
  82. 300B Orientation so logo faces forward
  83. Leak stereo 20
  84. Suggestion: Output tube in SET amp for midbass frequency
  85. Monster Hammond Output XFMRs
  86. 6A3 / 6B4G Design
  87. DC7 MK3 up and running.
  88. Marrantz Model 9 Transformer Buy
  89. 6N2P/6Н2П low plate current increases noise?
  90. first tube amp
  91. rogers cadet 111 or Quad 11
  92. New FM-3 Motherboard
  93. 12ax7(ecc83) and 6n2p 12ax7...........differents??
  94. Heater supply
  95. Very upgraded ST-70 kit/build w/ 6550 tubes
  96. Marantz 8b Electrolytics
  97. How biasing mA in tubes
  98. PSU id and help (psu designer ii)
  99. The all DHT SET Headphone Amp
  100. Assistance with rectifiers in PSUD
  101. Music Angel XD 500 MkII Bias setting
  102. Magnoval
  103. S.E.X. amp plate chokes replacements
  104. Ampex 600 Questions
  105. Antek out of business until April
  106. SE EL34 in triode schematic
  107. Sylvania Console?
  108. Can output transfomers be pick and mixed?
  109. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  110. Preamp Design Review Request
  111. Red Plate Of Doom
  112. LED cathode bias noise issue
  113. PCL86 se amplif.
  114. Is This a good Amplier?
  115. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  116. Contemporary Transformer for Doubler
  117. The volume pot - The hidden villain of preamp
  118. Heathkit EUW-15 Univ. Power Supply (Tube)
  119. diamond cathode tubes
  120. 6146B
  121. ef86 based preamp
  122. 12FQ7 Why and will it be shortage?
  123. Trouble w/ Maida regulator bias supply
  124. impedance calculations
  125. calibrate stark 8-77?
  126. EZLoad Dummy Load
  127. Best kit for a rookie tube builder
  128. schematic question? 805 feedback
  129. 6av5ga distortion spectrum
  130. Single stage line with anode-cathode feedback
  131. VNAV' SUMO Contest 2011
  132. Direct heated triode (dht) cathode bypass: different options
  133. choice of driver for RS 241
  134. Wiring up 3 6.3 Volt Heaters to a 12V supply
  135. Adding LED's to my tubes4hifi sp6 preamp
  136. Stripped down HK A-300
  137. Westrex 2332A amplifiers
  138. Leak st20
  139. Where could I find these sockets???
  140. Hammond L-112
  141. 4-pin tube socket spring clips
  142. Quad FM1 tuner, could be in wrong section
  143. My first tube amp and speaker build I'm loven it
  144. 211 IT amp, battery vs fixed bias
  145. 300B Tube Failure
  146. how to see if a Mullard 12ax7 reissue is long or short plate
  147. Can capacitors, how do they fail?
  148. Long Preamp to Power Amp Cable Lengths
  149. My time at Hovland - HP-100 Lore
  150. hybrid quad design
  151. TooB NooB: Options?
  152. Preamp grounding
  153. Express PCB and POV-ray
  154. Looking for circuit of SE amp. for 4D32
  155. 865 tetrode in triode mode...WOW !
  156. MP-2A preamp
  157. Is a 7 watt per channel amp enough
  158. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  159. Transformers
  160. Pentode curves for GU 50 SE amp with 700V B+
  161. Valve op-amp pre ?
  162. Use only half of OPT secondary?
  163. On/Off cycling
  164. Tube operating points help
  165. OTL Heater Questions
  166. tube output question
  167. RIAA LCR Mythos
  168. first tube amp
  169. M135 retubing and eventual modification
  170. Taylor 211 vs. GE 211
  171. regulated
  172. What should I do with these eico hf-12's?
  173. Dynaco mk3 clone hum issue
  174. First DIY project, which SE tube amp should I build?
  175. 6n11 tube headphone amp
  176. Kt88 Pin alignement problem=did a mistake
  177. LTspice Frustration...help, please..
  178. Bias mods
  179. Maida tracking preregulator?
  180. 230 VAC to 2*140 VAC transformer - 20VA
  181. Re gettering?
  182. Distortion rise on OPT
  183. How to build a transconductance tester for small driver tubes?
  184. Musical Fidelity X-10D Cap Mod
  185. 6N3 & 6E2 tubes.
  186. help with local nfb
  187. What should I build
  188. leak st20
  189. Wright Audio WPA 3.5 Humpot & schematics
  190. the old light bulb trick
  191. Dynaco ST70 KIT - your opinion please
  192. Wire for tubes using a plate cap?
  193. Lundahl LL1660 OPT Franks 6SN7 linestage
  194. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  195. Tomiko 10k PP transformer?
  196. Powerdrive for higher grid wattage A2 transmitter tubes
  197. Marantz Model 5 Amps and Model Seven Preamp
  198. How to calculate output transformers
  199. Grounding considerations with external PS
  200. Cathodyne fet buffered balanced line out
  201. 807pp + input phase splitter
  202. leak st 20
  203. Questions about Champ mods, NF loop and more
  204. Does anyone know what this is!..???
  205. Thought Exercise: Submini Circlotron OTL Amp
  206. Preamp Grounding PCB
  207. Manley 440: Tubes red cherry after replacing old tubes with new ones
  208. EL95 Parallel Push Pull design
  209. What is the ideal low-noise heater power for high-power output tubes?
  210. Beijing 6N6T
  211. Tube recomedations for my first tube amp
  212. Tube Load Lines and B+
  213. Hybrid rectifier possible in PSUD?
  214. Hickok calibration
  215. Bias voltage slower to come up
  216. Can You Reccommend a 6922 tube?
  217. Miniblok Resistor Parameter Modulation using Pots
  218. gm70 driver tube tests
  219. 300B Globe physical dimensions
  220. DIY Fisher 800b into a mic pre
  221. OPT Modification Question-Help please?
  222. Cant find origin
  223. Fixing Sneaky Oscillation in P-P Amplifiers
  224. fu-29 Audioromy
  225. Almarro A205A as experimentation platform
  226. Thoughts on layout and potential for improvements
  227. What is the difference between "rectifier tubes" and "power tubes"
  228. uTracer...
  229. EL84/UL84 single valve amp
  230. Mic preamp - strange high frequency roll off problem
  231. Tissbury audio
  232. midification to srpp preamplifier input voltage
  233. DHT SE amp with ultrapath
  234. Tube mic preamp problem
  235. Output transformer: reasons for destruction?
  236. Bewitch KT88
  237. SE OPT Wiring
  238. maggie 185 to stereo guitar amp?
  239. Budget 300b tubes recommendations
  240. Hum problem through one channel
  241. Audio Research LS22 DIY
  242. 300V Tube Power Supply From 120VAC Without Rectifier?
  243. NOS Tube: Black Spot on Getter Flashing? Help
  244. FET Source Follower Distortion
  245. TUBE/MOSFET/BJT hibrid amp
  246. PYE Black Box amplifier
  247. Tube tester
  248. what OPT for 211 parallel SE amp?
  249. Opinions for 6550 bias.
  250. 832A as a Single Ended Tetrode Amp?

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