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  1. Contan Audio from Melbourne Aus, any info?
  2. Loctal Base Post
  3. Timber amp with solid copper plate as earth and ground plane
  4. Dynaco ST70 - Which tubes do you like?
  5. 6SL7 in parallel driving 6550
  6. Will this work as a heater for 300b?
  7. Tube grid resistance for 6P45S, fine?
  8. Akido help pls
  9. BEARD P101 information
  10. Got some 6n3c-e (6p3s-e)with blank bulb?
  11. Graaf GM-20
  12. medium power OTL circlotron amplifier
  13. Help me identity this amp
  14. Hajdinjak preamp + 2x mono tube amp -What to do?
  15. Moscode 600 Noisy Fan
  16. component reduction in signal chain
  17. Aikido with Stax
  18. 'High power' shunt regulator
  19. Help need on Xindak XA3200MII hybrid pre-amplifier
  20. ideas for tube burn in / bias match station
  21. KT120 triode operation single stage amp
  22. Question regarding 7199 Tube wiring
  23. Why do modern PP OPTs have 16 Ohm taps?
  24. 10M45 current source
  25. 12bh7 in place of ecc82
  26. High voltage winding no center tap?
  27. Marantz 8b recap
  28. Pair Quad II in all original condition... restore or sell
  29. Where to find tube designers for hire?
  30. 10M45S problem
  31. 300B Load Line and Bias?
  32. Looking for little help with Glassware Janus shunt reg
  33. Quick question about grounding
  34. Source for 6jg5 or equivalent in Europe
  35. Need your help: Change from el34 to 6550 ends in a desaster
  36. conn el 6026 tube amp schematic for hifi stereo
  37. GE 211 "flash" question
  38. Learned something (the hard way) about mica capacitors
  39. Aikido octal floating output
  40. Screened cable for rewiring valve amp
  41. Fault developed, producing static noise
  42. Tubelab SE buzz and crackle
  43. EL34+Ecc83 amp hum
  44. Gold plated Dynaco ST-70 for $3k
  45. Preamp noise level ?
  46. KOSS A1220 - Vintage Tube Headphone Amp - Diagnose and Mod questions...
  47. Rectifier tube cathode and heater
  48. testing voltage on tube filament, without the tube
  49. New semi-custom metal chassis manufacturer
  50. 55 WPC 1625 Mono Block Amps
  51. Masco C-10 Mic/Phono Amp
  52. New driver stage for dynaco mk3
  53. Power Transformer Issue
  54. Marantz 8B
  55. Safety questions
  56. Step Attenuator
  57. amplifier output impedance measurement
  58. Regulated Vs Non-regulated linear Power Supply
  59. Single RIAA passive eq design for differential DC coupled tube circuit
  60. Amp to Drive Lowther DX3's in Rear Loaded Horn
  61. Anyone know what's going on with Antek?
  62. Sources of 120hz hum?
  63. make adapter from 6n2p to 12ax7
  64. DC coupling with a choke?
  65. help with hum 12ax7 preamp
  66. Signal->crossover->3 amps->speaker
  67. I want to build an inexpensive EL 84 integrated amp with a phono section.
  68. Scott17 KT88 SE Tube Amp Build Log
  69. heater currents
  70. 300B Orientation so logo faces forward
  71. Leak stereo 20
  72. Suggestion: Output tube in SET amp for midbass frequency
  73. Monster Hammond Output XFMRs
  74. 6A3 / 6B4G Design
  75. DC7 MK3 up and running.
  76. Marrantz Model 9 Transformer Buy
  77. 6N2P/6Н2П low plate current increases noise?
  78. first tube amp
  79. rogers cadet 111 or Quad 11
  80. New FM-3 Motherboard
  81. 12ax7(ecc83) and 6n2p 12ax7...........differents??
  82. Heater supply
  83. Very upgraded ST-70 kit/build w/ 6550 tubes
  84. Marantz 8b Electrolytics
  85. How biasing mA in tubes
  86. PSU id and help (psu designer ii)
  87. The all DHT SET Headphone Amp
  88. Assistance with rectifiers in PSUD
  89. Music Angel XD 500 MkII Bias setting
  90. Magnoval
  91. S.E.X. amp plate chokes replacements
  92. Ampex 600 Questions
  93. Antek out of business until April
  94. SE EL34 in triode schematic
  95. Sylvania Console?
  96. Can output transfomers be pick and mixed?
  97. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  98. Preamp Design Review Request
  99. Red Plate Of Doom
  100. LED cathode bias noise issue
  101. PCL86 se amplif.
  102. Is This a good Amplier?
  103. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  104. Contemporary Transformer for Doubler
  105. The volume pot - The hidden villain of preamp
  106. Heathkit EUW-15 Univ. Power Supply (Tube)
  107. diamond cathode tubes
  108. 6146B
  109. ef86 based preamp
  110. 12FQ7 Why and will it be shortage?
  111. Trouble w/ Maida regulator bias supply
  112. impedance calculations
  113. calibrate stark 8-77?
  114. EZLoad Dummy Load
  115. Best kit for a rookie tube builder
  116. schematic question? 805 feedback
  117. 6av5ga distortion spectrum
  118. Single stage line with anode-cathode feedback
  119. VNAV' SUMO Contest 2011
  120. Direct heated triode (dht) cathode bypass: different options
  121. choice of driver for RS 241
  122. Wiring up 3 6.3 Volt Heaters to a 12V supply
  123. Adding LED's to my tubes4hifi sp6 preamp
  124. Stripped down HK A-300
  125. Westrex 2332A amplifiers
  126. Leak st20
  127. Where could I find these sockets???
  128. Hammond L-112
  129. 4-pin tube socket spring clips
  130. Quad FM1 tuner, could be in wrong section
  131. My first tube amp and speaker build I'm loven it
  132. 211 IT amp, battery vs fixed bias
  133. 300B Tube Failure
  134. how to see if a Mullard 12ax7 reissue is long or short plate
  135. Can capacitors, how do they fail?
  136. Long Preamp to Power Amp Cable Lengths
  137. My time at Hovland - HP-100 Lore
  138. hybrid quad design
  139. TooB NooB: Options?
  140. Preamp grounding
  141. Express PCB and POV-ray
  142. Looking for circuit of SE amp. for 4D32
  143. 865 tetrode in triode mode...WOW !
  144. MP-2A preamp
  145. Is a 7 watt per channel amp enough
  146. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  147. Transformers
  148. Pentode curves for GU 50 SE amp with 700V B+
  149. Valve op-amp pre ?
  150. Use only half of OPT secondary?
  151. On/Off cycling
  152. Tube operating points help
  153. OTL Heater Questions
  154. tube output question
  155. RIAA LCR Mythos
  156. first tube amp
  157. M135 retubing and eventual modification
  158. Taylor 211 vs. GE 211
  159. regulated
  160. What should I do with these eico hf-12's?
  161. Dynaco mk3 clone hum issue
  162. First DIY project, which SE tube amp should I build?
  163. 6n11 tube headphone amp
  164. Kt88 Pin alignement problem=did a mistake
  165. LTspice Frustration...help, please..
  166. Bias mods
  167. Maida tracking preregulator?
  168. 230 VAC to 2*140 VAC transformer - 20VA
  169. Re gettering?
  170. Distortion rise on OPT
  171. How to build a transconductance tester for small driver tubes?
  172. Musical Fidelity X-10D Cap Mod
  173. 6N3 & 6E2 tubes.
  174. help with local nfb
  175. What should I build
  176. leak st20
  177. Wright Audio WPA 3.5 Humpot & schematics
  178. the old light bulb trick
  179. Dynaco ST70 KIT - your opinion please
  180. Wire for tubes using a plate cap?
  181. Lundahl LL1660 OPT Franks 6SN7 linestage
  182. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  183. Tomiko 10k PP transformer?
  184. Powerdrive for higher grid wattage A2 transmitter tubes
  185. Marantz Model 5 Amps and Model Seven Preamp
  186. How to calculate output transformers
  187. Grounding considerations with external PS
  188. Cathodyne fet buffered balanced line out
  189. 807pp + input phase splitter
  190. leak st 20
  191. Does anyone know what this is!..???
  192. Thought Exercise: Submini Circlotron OTL Amp
  193. Preamp Grounding PCB
  194. Manley 440: Tubes red cherry after replacing old tubes with new ones
  195. EL95 Parallel Push Pull design
  196. What is the ideal low-noise heater power for high-power output tubes?
  197. Beijing 6N6T
  198. Tube recomedations for my first tube amp
  199. Tube Load Lines and B+
  200. Hybrid rectifier possible in PSUD?
  201. Hickok calibration
  202. Bias voltage slower to come up
  203. Can You Reccommend a 6922 tube?
  204. Miniblok Resistor Parameter Modulation using Pots
  205. gm70 driver tube tests
  206. 300B Globe physical dimensions
  207. DIY Fisher 800b into a mic pre
  208. OPT Modification Question-Help please?
  209. Cant find origin
  210. Fixing Sneaky Oscillation in P-P Amplifiers
  211. fu-29 Audioromy
  212. Almarro A205A as experimentation platform
  213. Thoughts on layout and potential for improvements
  214. What is the difference between "rectifier tubes" and "power tubes"
  215. uTracer...
  216. EL84/UL84 single valve amp
  217. Mic preamp - strange high frequency roll off problem
  218. Tissbury audio
  219. midification to srpp preamplifier input voltage
  220. DHT SE amp with ultrapath
  221. Tube mic preamp problem
  222. Output transformer: reasons for destruction?
  223. Bewitch KT88
  224. SE OPT Wiring
  225. Budget 300b tubes recommendations
  226. Hum problem through one channel
  227. Audio Research LS22 DIY
  228. 300V Tube Power Supply From 120VAC Without Rectifier?
  229. NOS Tube: Black Spot on Getter Flashing? Help
  230. FET Source Follower Distortion
  231. TUBE/MOSFET/BJT hibrid amp
  232. PYE Black Box amplifier
  233. Tube tester
  234. what OPT for 211 parallel SE amp?
  235. Opinions for 6550 bias.
  236. 832A as a Single Ended Tetrode Amp?
  237. DCPP - "Engineer's Amplifier" : Need a bit of help
  238. quicky rebuild 6v6 to 807
  239. Old fire bottles.
  240. Regulated Power Supply using 6550
  241. GU50 SE vs 300B SE tube amp??
  242. Help with voltages
  243. New to valves & this forum.
  244. new amp 2a3 pp
  245. Telefunken EL153 SE circuity
  246. RH 84 Variation: Direct Coupled Pentode
  247. Single Transformer, two valve rectifiers
  248. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  249. Tube Screening Cans
  250. PSU grounding

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