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  1. Phono Preamp
  2. Dynaco ST-70 with a GSI board, Parts diagram and any info PLEASE
  3. transistor AC blocker
  4. PL519 Source
  5. Identify this mullard
  6. Suppo Audio -- New Chinese EL84 PP amp for CHEAP.
  7. Beard p35mkII schematics/photo photo
  8. Bias transformer question
  9. Anyone deliberately dial in 2nd harmonic?
  10. What is the sonic impact of SS CCS in tube equipment
  11. Phase help
  12. El34-kt88
  13. Transconductance amplifier based on hybrid cascode
  14. Chinese 6Z4, also those regulated supplies.
  15. Audion Reference restoration
  16. Anyone try a regulated PS in an Ultrapath preamp?
  17. Source for Resistor sets?
  18. High Zout tube preamps with ss power amps.
  19. PSUD II soft start
  20. About the 6AU6s
  21. Capacitor polarity question
  22. Audio Note line preamp question
  23. EL34 SE amp schematic
  24. looking for 12AT7 / ECC81 phase splitter
  25. 6AS7 getting rare?
  26. How to power up a new Build the first time
  27. power transformer for a 2a3se amp!
  28. 6DJ8 Tube Phono and Line Preamp
  29. ST-35 Build Using PC13 Boards Questions and Thoughts
  30. My new hybrid full single ended amplifier project on going
  31. Punch tools for making metal top plates on amps
  32. antique sound lab AQ1009-845 interstage transformer replacement
  33. The search for the ultimate 6SN7
  34. Looking for a good part web store
  35. Need your advice for tube amp case
  36. Questions about grounding
  37. power supply
  38. Strange idea for an output stage - comments requested
  39. Please comment on this EL84 PP design
  40. 1.5VDC Heater Supply For #26!?
  41. Looking for 300B or 2A3 design suggestions......gearing up for a new project
  42. original philips AD-9058
  43. Bench test equipment, What's yours?
  44. Gain calculating in 12ax7 guitar preamp
  45. Tube Lab SE Problem
  46. Tube Socket help, I'm looking at a few, but not sure which material to buy?
  47. Sweep tube info/specs
  48. Help for Tango 300b amp
  49. vacuum tubes type 10 and UX201A
  50. 6DQ5 specs for audio
  51. r-core output transformers...
  52. Isolation Transformer Question
  53. Buffer question?
  54. el95 pp amp for guitar
  55. Two positive rails from a center-tapped transformer?
  56. Help reqd - 115V PTX on 230V
  57. Replacing the cathode resistor with a current source in SE ?
  58. First 300b Design, Please comment
  59. 6AX4 datasheet question
  60. Bias Drift
  61. Recommend me a tube...
  62. What happens when Heater Cathode voltage is exceeded?
  63. 100uF Motor Run Caps
  64. HELP Schematics for RL 12 T 15
  65. Phono Stage
  66. TEE Vee Tube fans' SE Cf Amp
  67. Yaqin MC-10L losing volume
  68. Pl84 tubes
  69. AnalogMetric 6L6GC SE amp kit...thoughts about this kit?
  70. 5150 or slo 5-50w clone
  71. ECC88, warm up time
  72. Yaqin MC-10L Heater Voltage
  73. 6c33 otl amblifier
  74. self-oscillation in Dynaco ST-70
  75. computer tube tester
  76. Troubleshooting the decware se84 kit
  77. 6L6 PP problem
  78. First try at an Eagle Schematic/board
  79. opinions on decware zen kit
  80. Powerdrive for PP amp with local feedback and pentode driver ?
  81. having trouble calculating transconductance
  82. Philips console unit with reverb!
  83. 300BSET with Kimmel style mu driver ?
  84. Testing Mullard 12AU7 on Hickok 600A
  85. EL34/6CA7 driven 300B Schematics
  86. C450 Radio Craftsmen info needed
  87. Tubelab Simple SE v.2
  88. Magnetic shielding with aluminum
  89. lampizator dac
  90. AES is At It Again...
  91. Se Amp with Push Pull Transformer
  92. 6550 which breed can take the flog ?
  93. Chassis Question
  94. EL82 in triode with silverstepper (TVC)
  95. Joined the 12b4 line stage club. And worth it!
  96. ECL86/PCL86 Schematic
  97. Ambient temperature and tubes
  98. Vintage output transformers
  99. -ve grid voltage
  100. Ming Da MC-3008-A2 Mono Blocks
  101. V-Reg, Gyrator, Low (relative) voltage tubes
  102. Simple Tube amp
  103. Jolida 502A replace power switch
  104. Tubelab build selector switch question
  105. Matching tubes pot in old Fenders
  106. tubes supplier
  107. RadioDaze out of the tube business
  108. 8000+ hours on my Simple SE
  109. C-L-C-parallel-R-C
  110. musical power supplies
  111. Trimpots sound better than equivalent resistors for biasing?
  112. Anyone have a simple circuit for . .
  113. PP Tube Biasing, how good is good enough?
  114. Aesthetics
  115. Point to point, from scatch build of the K-12G
  116. What 6550 for Conrad MV75
  117. Motorboating phono input on Stromberg Carlson ASR433
  118. Sunn Sceptre: Weak Vibrato Cause?
  119. Pioneer sr-101
  120. 6AU6 in Push Pull: Opinions please
  121. Audionote M7 and Foreplay III
  122. vintage triode
  123. Help with design review wanted
  124. 6J52P pentode driver?
  125. a gutar amp I built
  126. Looking for a good valve preamp
  127. Anyone try the "Hazen mod" to G3 supressor grid
  128. 6L6GC -Which Shuguang can take the Heat?
  129. Using Toroidal PTs as tube OTs - methods and sources
  130. With a little help... KT88 PP UL Amp
  131. TechTube Featured In November AudioXpress
  132. Yaqin MC-100b channel imbalance
  133. Regulated Tube Preamp question
  134. Has anybody purchased from Mable Audio?
  135. PS voltage changes after capacitor replacement
  136. Non-magnetic bolts that hold an output transformer together
  137. Audio Innovations Series 500 Rewire
  138. Which audio electrolytics in tube voltages -- Your comments please !
  139. Some general opt questions.
  140. Looking for ANYTHING on the Audioromy 838 w/805A Tube..
  141. modifying zenith 7d31 amp console
  142. Questions on JE Labs transformer coupled line stage
  143. Onix/Melody SP3 Upgrades and Mods
  144. Motorboating with Regulated Supply
  145. 27 & 6SN7 Preamp - Crossover
  146. Budget 2A3?
  147. first go at design - pp
  148. Tube Amp for MP3 Player
  149. Sonic signatures of KT88, 300B, 805, 845 in SET & PP Configurations
  150. Marshall amp loses bias
  151. Building the Baby Huey EL84 pushpull amplifier
  152. Tube Voltage Regulator, Is it worth the effort?
  153. Best tubeamp for metal, tight bass
  154. Donor stereo 845 amp- now what!?
  155. "Optimal" output grid loading?
  156. wax poured out!
  157. Yet another do-nothing tOOb hack.
  158. What is a CCS - how do you design one?
  159. Strange Aikido problem when home power fluctuates
  160. Need to regulate 450v --> 300v
  161. new to the forum and looking for el86 info
  162. Why not invert the Tubelab SE board?
  163. Steve Bench Crossover Questions
  164. Audio Note M7 - 7F7 CCS
  165. Anyone have schema for katodcoupled 6C33 P-P?
  166. Ltspice and Valve models
  167. VTV Push-Pull 6SN7/KT88 Amp: DIY or China?
  168. How to identify type of bias used for my tube amp
  169. VR Tube Question
  170. Ampmaker Kits
  171. P-P with some muscle
  172. buzz w/ nothing plugged into inputs. Goes away once jacked in.
  173. CV6 / CV1135 / E1148 / VT232 VHF oscillator triode data
  174. HELP HELP HELP mesa rectifier
  175. simple se with source selector
  176. Measuring tube/component temperature
  177. Parallel Single Ended Amplifier Design using Acro TO-290s?
  178. Elevate heater trouble
  179. Adjusting the sensitivity on a 6e2 magic eye tube
  180. tube amp for automobile / need ideas
  181. 6550A HF Amp
  182. problem - scratchy sound, rythmical
  183. eico st70 irons!what to do?
  184. How Lampizator CD tube player sound?
  185. Maestro soya amplificador
  186. Can I use my tube amp as a preamp ?
  187. Simple SE with 6BG6GA - magic smoke escapes...
  188. Shunt Cascode Power Valve Driver
  189. Did Siemens ever publish data for their own D3A ?
  190. Motor run caps as power supply filter
  191. Measure unknown choke?
  192. 6528a....HELP ME PLEASE...PLEASE..
  193. Are any of these tubes useful to me?
  194. Heaters The Key Too Sweet Tube Tone.
  195. PP Output Transformer design
  196. "Kingfisher" P-P Amp using 7591A Outputs and Fisher 500B Iron
  197. 832 ultra-linear push pull?
  198. 3A5 thoughts
  199. ECC86 vs. ECC88
  200. RH84 builder!
  201. 10GV8 Bias point for the K-12G
  202. EL34 amp blowing up, anode glowing red hot
  203. Steve Bench's LR Phono Stage - Cathode Bias Circuit Question
  204. Tubelab SE w/Parafeed
  205. Chinese 805 SET monoblock
  206. Vreg or Ireg for Phono heaters
  207. Traynor YMV-1 Voicemaster to Guitar conversion
  208. Pentode preamp tube hum balance
  209. New (old) Friends
  210. How to avoid oscillation and get max BW out of crappy OPT
  211. Power Measurements at normal listening levels
  212. Best way to terminate unused OPT winding?
  213. patent on single-ended amplifier, anno 2008
  214. Headphones amplifier with highish gnfb
  215. Bias meter for AQ1008DT
  216. Change Tubes
  217. PLC84 amp
  218. Color Coding for Fisher 500B Iron
  219. Tubelab SE with 45 tubes only
  220. 6L6GC, ECC33, EF37 Amp.. Just cant get it right
  221. 10dB increase in volume needs what gain?
  222. El Cheapo feedback loop adjustment
  223. KT88 blocks? With E80CC + 6922 driver?
  224. 200+/- USA Tubes Plus "Weston Model 891" Tube Checker
  225. Violator Amp
  226. What to do with 3500uF 650V caps???
  227. SS Rectification
  228. Passive filter at tube amp input
  229. Found this Trio WX-400
  230. PSUD & The JE Labs 2A3
  231. 815
  232. x1 Oscilloscope probes
  233. Iron LTP Schade-PP
  234. Single Ended Pentode Spud and Feedback
  235. Yes, I've searched. Can I use a PP OPT in a SE amp ?
  236. DC on toroid PT windings
  237. Audible benefits of larger coupling caps than required?
  238. Any benefits of regulated current heater supply?
  239. Power Transformer Kaput ???
  240. aikido phono schematic qustion
  241. Easy question for experienced tubies
  242. valves dont sound so good when pink....
  243. Aikido Resistor Help
  244. Mobile Phone Interference
  245. Thank you DIY Audio
  246. Fisher 80-R Can't Find a Schematic
  247. SRPP layout
  248. Rogers E40a Amplifier Schematic
  249. Encapsulating OPTs
  250. Does anyone have 6BQ6 (sweep tube) triode plate curves to share?

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