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  1. What does your system look like?
  2. Cascoding tubes
  3. Advice with modification of Beard power amp
  4. Harman Kardon TA5000-X power XFMR
  5. This happens when you hire a good designer.
  6. Test & Measurement interface for Soundcard
  7. Where to find large capacity high voltage caps?
  8. 1st Pass at 1st Phono Preamp; Comments?
  9. Transformers to try.
  10. Hum in phono pre - help please
  11. Output transformer cores
  12. Output transformer cores
  13. Presonus Bluetube makeover
  14. Tube Amp Channel Switching
  15. physically small twin triode tube
  16. Tubelab SE 2A3 _ Newbie question.
  17. TJ Full Music Factory Tour Now Online
  18. where to find cool vol control knobs?
  19. $200 6V6 Amp
  20. Audio Research Reference Phono, anyone?
  21. Review of Suppo Audio's first offering - EL84 Push Pull
  22. 6n23p(-ev)
  23. Akikido LSA/HPA 9-Pin or Akikido Octal which one?
  24. TUBE AMP 1946 worth grabbing?
  25. SE Newbie wants to go level 2
  26. Where To Purchase Tube Amp Parts in the UK
  27. The soul of a new "electrostatic" machine
  28. Transformer question
  29. Hybrid caps
  30. 6021 phono pre-amp
  31. How to design input stage with specific input impedance/pot value
  32. Simple SE Grounding Question
  33. James OPT connections?
  34. DIY rtp5 help please?
  35. SS Followers to drive power tubes
  36. Sophia Electric EL34 Schematic
  37. DRD amplifier with CCS?
  38. Phono Preamp
  39. Dynaco ST-70 with a GSI board, Parts diagram and any info PLEASE
  40. transistor AC blocker
  41. PL519 Source
  42. Identify this mullard
  43. Suppo Audio -- New Chinese EL84 PP amp for CHEAP.
  44. Beard p35mkII schematics/photo photo
  45. Bias transformer question
  46. Anyone deliberately dial in 2nd harmonic?
  47. What is the sonic impact of SS CCS in tube equipment
  48. Phase help
  49. El34-kt88
  50. Transconductance amplifier based on hybrid cascode
  51. Chinese 6Z4, also those regulated supplies.
  52. Audion Reference restoration
  53. Anyone try a regulated PS in an Ultrapath preamp?
  54. Source for Resistor sets?
  55. High Zout tube preamps with ss power amps.
  56. PSUD II soft start
  57. About the 6AU6s
  58. Capacitor polarity question
  59. Audio Note line preamp question
  60. EL34 SE amp schematic
  61. looking for 12AT7 / ECC81 phase splitter
  62. 6AS7 getting rare?
  63. How to power up a new Build the first time
  64. power transformer for a 2a3se amp!
  65. 6DJ8 Tube Phono and Line Preamp
  66. ST-35 Build Using PC13 Boards Questions and Thoughts
  67. My new hybrid full single ended amplifier project on going
  68. Punch tools for making metal top plates on amps
  69. antique sound lab AQ1009-845 interstage transformer replacement
  70. The search for the ultimate 6SN7
  71. Looking for a good part web store
  72. Need your advice for tube amp case
  73. Questions about grounding
  74. power supply
  75. Strange idea for an output stage - comments requested
  76. Please comment on this EL84 PP design
  77. 1.5VDC Heater Supply For #26!?
  78. Looking for 300B or 2A3 design suggestions......gearing up for a new project
  79. original philips AD-9058
  80. Bench test equipment, What's yours?
  81. Tube Lab SE Problem
  82. Tube Socket help, I'm looking at a few, but not sure which material to buy?
  83. Sweep tube info/specs
  84. Help for Tango 300b amp
  85. vacuum tubes type 10 and UX201A
  86. 6DQ5 specs for audio
  87. r-core output transformers...
  88. Isolation Transformer Question
  89. Buffer question?
  90. Two positive rails from a center-tapped transformer?
  91. Help reqd - 115V PTX on 230V
  92. Replacing the cathode resistor with a current source in SE ?
  93. First 300b Design, Please comment
  94. 6AX4 datasheet question
  95. Bias Drift
  96. Recommend me a tube...
  97. What happens when Heater Cathode voltage is exceeded?
  98. 100uF Motor Run Caps
  99. HELP Schematics for RL 12 T 15
  100. Phono Stage
  101. TEE Vee Tube fans' SE Cf Amp
  102. Yaqin MC-10L losing volume
  103. Pl84 tubes
  104. AnalogMetric 6L6GC SE amp kit...thoughts about this kit?
  105. 5150 or slo 5-50w clone
  106. ECC88, warm up time
  107. Yaqin MC-10L Heater Voltage
  108. 6c33 otl amblifier
  109. self-oscillation in Dynaco ST-70
  110. computer tube tester
  111. Troubleshooting the decware se84 kit
  112. 6L6 PP problem
  113. First try at an Eagle Schematic/board
  114. opinions on decware zen kit
  115. Powerdrive for PP amp with local feedback and pentode driver ?
  116. having trouble calculating transconductance
  117. Philips console unit with reverb!
  118. 300BSET with Kimmel style mu driver ?
  119. Testing Mullard 12AU7 on Hickok 600A
  120. EL34/6CA7 driven 300B Schematics
  121. C450 Radio Craftsmen info needed
  122. Tubelab Simple SE v.2
  123. Magnetic shielding with aluminum
  124. lampizator dac
  125. AES is At It Again...
  126. Se Amp with Push Pull Transformer
  127. 6550 which breed can take the flog ?
  128. Chassis Question
  129. EL82 in triode with silverstepper (TVC)
  130. Joined the 12b4 line stage club. And worth it!
  131. ECL86/PCL86 Schematic
  132. Ambient temperature and tubes
  133. Vintage output transformers
  134. -ve grid voltage
  135. Ming Da MC-3008-A2 Mono Blocks
  136. V-Reg, Gyrator, Low (relative) voltage tubes
  137. Simple Tube amp
  138. Jolida 502A replace power switch
  139. Tubelab build selector switch question
  140. tubes supplier
  141. RadioDaze out of the tube business
  142. 8000+ hours on my Simple SE
  143. C-L-C-parallel-R-C
  144. musical power supplies
  145. Trimpots sound better than equivalent resistors for biasing?
  146. Anyone have a simple circuit for . .
  147. PP Tube Biasing, how good is good enough?
  148. Aesthetics
  149. Point to point, from scatch build of the K-12G
  150. What 6550 for Conrad MV75
  151. Motorboating phono input on Stromberg Carlson ASR433
  152. Pioneer sr-101
  153. 6AU6 in Push Pull: Opinions please
  154. Audionote M7 and Foreplay III
  155. vintage triode
  156. Help with design review wanted
  157. 6J52P pentode driver?
  158. a gutar amp I built
  159. Looking for a good valve preamp
  160. Anyone try the "Hazen mod" to G3 supressor grid
  161. 6L6GC -Which Shuguang can take the Heat?
  162. Using Toroidal PTs as tube OTs - methods and sources
  163. With a little help... KT88 PP UL Amp
  164. TechTube Featured In November AudioXpress
  165. Yaqin MC-100b channel imbalance
  166. Regulated Tube Preamp question
  167. Has anybody purchased from Mable Audio?
  168. PS voltage changes after capacitor replacement
  169. Non-magnetic bolts that hold an output transformer together
  170. Audio Innovations Series 500 Rewire
  171. Which audio electrolytics in tube voltages -- Your comments please !
  172. Some general opt questions.
  173. Looking for ANYTHING on the Audioromy 838 w/805A Tube..
  174. modifying zenith 7d31 amp console
  175. Questions on JE Labs transformer coupled line stage
  176. Onix/Melody SP3 Upgrades and Mods
  177. Motorboating with Regulated Supply
  178. 27 & 6SN7 Preamp - Crossover
  179. Budget 2A3?
  180. first go at design - pp
  181. Tube Amp for MP3 Player
  182. Sonic signatures of KT88, 300B, 805, 845 in SET & PP Configurations
  183. Building the Baby Huey EL84 pushpull amplifier
  184. Tube Voltage Regulator, Is it worth the effort?
  185. Best tubeamp for metal, tight bass
  186. Donor stereo 845 amp- now what!?
  187. "Optimal" output grid loading?
  188. wax poured out!
  189. Yet another do-nothing tOOb hack.
  190. What is a CCS - how do you design one?
  191. Strange Aikido problem when home power fluctuates
  192. Need to regulate 450v --> 300v
  193. new to the forum and looking for el86 info
  194. Why not invert the Tubelab SE board?
  195. Steve Bench Crossover Questions
  196. Audio Note M7 - 7F7 CCS
  197. Anyone have schema for katodcoupled 6C33 P-P?
  198. Ltspice and Valve models
  199. VTV Push-Pull 6SN7/KT88 Amp: DIY or China?
  200. How to identify type of bias used for my tube amp
  201. VR Tube Question
  202. Ampmaker Kits
  203. P-P with some muscle
  204. buzz w/ nothing plugged into inputs. Goes away once jacked in.
  205. CV6 / CV1135 / E1148 / VT232 VHF oscillator triode data
  206. HELP HELP HELP mesa rectifier
  207. simple se with source selector
  208. Measuring tube/component temperature
  209. Parallel Single Ended Amplifier Design using Acro TO-290s?
  210. Elevate heater trouble
  211. Adjusting the sensitivity on a 6e2 magic eye tube
  212. tube amp for automobile / need ideas
  213. 6550A HF Amp
  214. problem - scratchy sound, rythmical
  215. eico st70 irons!what to do?
  216. How Lampizator CD tube player sound?
  217. Maestro soya amplificador
  218. Can I use my tube amp as a preamp ?
  219. Simple SE with 6BG6GA - magic smoke escapes...
  220. Shunt Cascode Power Valve Driver
  221. Did Siemens ever publish data for their own D3A ?
  222. Motor run caps as power supply filter
  223. Measure unknown choke?
  224. 6528a....HELP ME PLEASE...PLEASE..
  225. Are any of these tubes useful to me?
  226. Heaters The Key Too Sweet Tube Tone.
  227. PP Output Transformer design
  228. "Kingfisher" P-P Amp using 7591A Outputs and Fisher 500B Iron
  229. 832 ultra-linear push pull?
  230. 3A5 thoughts
  231. ECC86 vs. ECC88
  232. RH84 builder!
  233. 10GV8 Bias point for the K-12G
  234. EL34 amp blowing up, anode glowing red hot
  235. Steve Bench's LR Phono Stage - Cathode Bias Circuit Question
  236. Tubelab SE w/Parafeed
  237. Chinese 805 SET monoblock
  238. Vreg or Ireg for Phono heaters
  239. Pentode preamp tube hum balance
  240. New (old) Friends
  241. How to avoid oscillation and get max BW out of crappy OPT
  242. Power Measurements at normal listening levels
  243. Best way to terminate unused OPT winding?
  244. patent on single-ended amplifier, anno 2008
  245. Headphones amplifier with highish gnfb
  246. Bias meter for AQ1008DT
  247. Change Tubes
  248. PLC84 amp
  249. Color Coding for Fisher 500B Iron
  250. Tubelab SE with 45 tubes only

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