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  1. Bias Drift
  2. Recommend me a tube...
  3. What happens when Heater Cathode voltage is exceeded?
  4. 100uF Motor Run Caps
  5. HELP Schematics for RL 12 T 15
  6. Phono Stage
  7. TEE Vee Tube fans' SE Cf Amp
  8. Yaqin MC-10L losing volume
  9. Pl84 tubes
  10. AnalogMetric 6L6GC SE amp kit...thoughts about this kit?
  11. 5150 or slo 5-50w clone
  12. ECC88, warm up time
  13. Yaqin MC-10L Heater Voltage
  14. 6c33 otl amblifier
  15. self-oscillation in Dynaco ST-70
  16. computer tube tester
  17. Troubleshooting the decware se84 kit
  18. 6L6 PP problem
  19. First try at an Eagle Schematic/board
  20. opinions on decware zen kit
  21. Powerdrive for PP amp with local feedback and pentode driver ?
  22. having trouble calculating transconductance
  23. Philips console unit with reverb!
  24. 300BSET with Kimmel style mu driver ?
  25. Testing Mullard 12AU7 on Hickok 600A
  26. EL34/6CA7 driven 300B Schematics
  27. C450 Radio Craftsmen info needed
  28. Tubelab Simple SE v.2
  29. Magnetic shielding with aluminum
  30. lampizator dac
  31. AES is At It Again...
  32. Se Amp with Push Pull Transformer
  33. 6550 which breed can take the flog ?
  34. Chassis Question
  35. EL82 in triode with silverstepper (TVC)
  36. Joined the 12b4 line stage club. And worth it!
  37. ECL86/PCL86 Schematic
  38. Ambient temperature and tubes
  39. Vintage output transformers
  40. -ve grid voltage
  41. Ming Da MC-3008-A2 Mono Blocks
  42. V-Reg, Gyrator, Low (relative) voltage tubes
  43. Simple Tube amp
  44. Jolida 502A replace power switch
  45. Tubelab build selector switch question
  46. Matching tubes pot in old Fenders
  47. tubes supplier
  48. RadioDaze out of the tube business
  49. 8000+ hours on my Simple SE
  50. C-L-C-parallel-R-C
  51. musical power supplies
  52. Trimpots sound better than equivalent resistors for biasing?
  53. Anyone have a simple circuit for . .
  54. PP Tube Biasing, how good is good enough?
  55. Aesthetics
  56. Point to point, from scatch build of the K-12G
  57. What 6550 for Conrad MV75
  58. Motorboating phono input on Stromberg Carlson ASR433
  59. Sunn Sceptre: Weak Vibrato Cause?
  60. Pioneer sr-101
  61. 6AU6 in Push Pull: Opinions please
  62. Audionote M7 and Foreplay III
  63. vintage triode
  64. Help with design review wanted
  65. 6J52P pentode driver?
  66. a gutar amp I built
  67. Looking for a good valve preamp
  68. Anyone try the "Hazen mod" to G3 supressor grid
  69. 6L6GC -Which Shuguang can take the Heat?
  70. Using Toroidal PTs as tube OTs - methods and sources
  71. With a little help... KT88 PP UL Amp
  72. TechTube Featured In November AudioXpress
  73. Yaqin MC-100b channel imbalance
  74. Regulated Tube Preamp question
  75. Has anybody purchased from Mable Audio?
  76. PS voltage changes after capacitor replacement
  77. Non-magnetic bolts that hold an output transformer together
  78. Audio Innovations Series 500 Rewire
  79. Which audio electrolytics in tube voltages -- Your comments please !
  80. Some general opt questions.
  81. Looking for ANYTHING on the Audioromy 838 w/805A Tube..
  82. modifying zenith 7d31 amp console
  83. Questions on JE Labs transformer coupled line stage
  84. Onix/Melody SP3 Upgrades and Mods
  85. Motorboating with Regulated Supply
  86. 27 & 6SN7 Preamp - Crossover
  87. Budget 2A3?
  88. first go at design - pp
  89. Tube Amp for MP3 Player
  90. Sonic signatures of KT88, 300B, 805, 845 in SET & PP Configurations
  91. Marshall amp loses bias
  92. Building the Baby Huey EL84 pushpull amplifier
  93. Tube Voltage Regulator, Is it worth the effort?
  94. Best tubeamp for metal, tight bass
  95. Donor stereo 845 amp- now what!?
  96. "Optimal" output grid loading?
  97. wax poured out!
  98. Yet another do-nothing tOOb hack.
  99. What is a CCS - how do you design one?
  100. Strange Aikido problem when home power fluctuates
  101. Need to regulate 450v --> 300v
  102. new to the forum and looking for el86 info
  103. Why not invert the Tubelab SE board?
  104. Steve Bench Crossover Questions
  105. Audio Note M7 - 7F7 CCS
  106. Anyone have schema for katodcoupled 6C33 P-P?
  107. Ltspice and Valve models
  108. VTV Push-Pull 6SN7/KT88 Amp: DIY or China?
  109. How to identify type of bias used for my tube amp
  110. VR Tube Question
  111. Ampmaker Kits
  112. P-P with some muscle
  113. buzz w/ nothing plugged into inputs. Goes away once jacked in.
  114. CV6 / CV1135 / E1148 / VT232 VHF oscillator triode data
  115. HELP HELP HELP mesa rectifier
  116. simple se with source selector
  117. Measuring tube/component temperature
  118. Parallel Single Ended Amplifier Design using Acro TO-290s?
  119. Elevate heater trouble
  120. Adjusting the sensitivity on a 6e2 magic eye tube
  121. tube amp for automobile / need ideas
  122. 6550A HF Amp
  123. problem - scratchy sound, rythmical
  124. eico st70 irons!what to do?
  125. How Lampizator CD tube player sound?
  126. Maestro soya amplificador
  127. Can I use my tube amp as a preamp ?
  128. Simple SE with 6BG6GA - magic smoke escapes...
  129. Shunt Cascode Power Valve Driver
  130. Did Siemens ever publish data for their own D3A ?
  131. Motor run caps as power supply filter
  132. Measure unknown choke?
  133. 6528a....HELP ME PLEASE...PLEASE..
  134. Are any of these tubes useful to me?
  135. Heaters The Key Too Sweet Tube Tone.
  136. PP Output Transformer design
  137. "Kingfisher" P-P Amp using 7591A Outputs and Fisher 500B Iron
  138. 832 ultra-linear push pull?
  139. 3A5 thoughts
  140. ECC86 vs. ECC88
  141. RH84 builder!
  142. 10GV8 Bias point for the K-12G
  143. EL34 amp blowing up, anode glowing red hot
  144. Steve Bench's LR Phono Stage - Cathode Bias Circuit Question
  145. Tubelab SE w/Parafeed
  146. Chinese 805 SET monoblock
  147. Vreg or Ireg for Phono heaters
  148. Traynor YMV-1 Voicemaster to Guitar conversion
  149. Pentode preamp tube hum balance
  150. New (old) Friends
  151. How to avoid oscillation and get max BW out of crappy OPT
  152. Power Measurements at normal listening levels
  153. Best way to terminate unused OPT winding?
  154. patent on single-ended amplifier, anno 2008
  155. Headphones amplifier with highish gnfb
  156. Bias meter for AQ1008DT
  157. Change Tubes
  158. PLC84 amp
  159. Color Coding for Fisher 500B Iron
  160. Tubelab SE with 45 tubes only
  161. 6L6GC, ECC33, EF37 Amp.. Just cant get it right
  162. 10dB increase in volume needs what gain?
  163. El Cheapo feedback loop adjustment
  164. KT88 blocks? With E80CC + 6922 driver?
  165. 200+/- USA Tubes Plus "Weston Model 891" Tube Checker
  166. Violator Amp
  167. What to do with 3500uF 650V caps???
  168. SS Rectification
  169. Passive filter at tube amp input
  170. Found this Trio WX-400
  171. PSUD & The JE Labs 2A3
  172. 815
  173. x1 Oscilloscope probes
  174. Iron LTP Schade-PP
  175. Single Ended Pentode Spud and Feedback
  176. Yes, I've searched. Can I use a PP OPT in a SE amp ?
  177. DC on toroid PT windings
  178. Audible benefits of larger coupling caps than required?
  179. Any benefits of regulated current heater supply?
  180. Power Transformer Kaput ???
  181. aikido phono schematic qustion
  182. Easy question for experienced tubies
  183. valves dont sound so good when pink....
  184. Aikido Resistor Help
  185. Mobile Phone Interference
  186. Thank you DIY Audio
  187. Fisher 80-R Can't Find a Schematic
  188. SRPP layout
  189. Rogers E40a Amplifier Schematic
  190. Encapsulating OPTs
  191. Does anyone have 6BQ6 (sweep tube) triode plate curves to share?
  192. JAN6418 and microphony
  193. can the 6n9s take 300v? (ru 6sl7)
  194. Output impedance of various MOSFET followers at low (<10mA) currents
  195. Big Box O' Tubes
  196. 6j7g 832a amp
  197. Quick Question on Dc coupling
  198. PP question - best driver stage!
  199. SRPP+, or did JRB "borrow" from here?
  200. 5651(A) 85Kr
  201. Ampex 6v6 PP.. worth saving?
  202. The DeForest 504 tube
  203. Sven 6P1P PP Amp
  204. Black 6V6GT - originals
  205. tube phasing for more power?
  206. measuring output transformer inductance?
  207. Question re paralleling common-cathode tube sections
  208. There's so much bait for dumb fishies out there!
  209. Biasing G3 in beamies
  210. 6DJ8 vs 6N1P (6H1N)
  211. Test equipment collection
  212. Rca mi-9358a
  213. FISHER - 500b Caps Leave Them In ???
  214. tek 454
  215. RCA Calypso
  216. New to Valve Amps and Confused???
  217. Anyone used the TL783 as a CCS
  218. Katelelo
  219. EFE-1 (PP EL-34) by Miolljub Mile Nestorovic
  220. Ping netlist - ECC88 spice models
  221. Please help analyse 807 PPP
  222. DIY Tube Pre with remote
  223. P-P Katodfollower with 6c33c
  224. valve sub
  225. Help on outboard PSU for tube amp
  226. Looking for ARC LS8MKII circuit?
  227. Entire Assembly Glowing in 20 Seconds
  228. 6X5GT PS Problem
  229. Sad News About Blackburn / Tech Tube
  230. Loose top caps.
  231. rh807 choke question?
  232. 6021 Cascode
  233. 6U7-G as driver in a RH 807?
  234. Possible Ebay bargain
  235. Possible Ebay bargin
  236. 845 tube question
  237. Broken VCM163
  238. my ongoing amp project since 2004 or so, ver. 13.29.b1.xx.n
  239. Datasheet wanted
  240. SE 833A Help
  241. PS ripple vs output impedance for PP AB1
  242. Simple SE with 807?
  243. Dynaco Bias Balance kit
  244. EL42 Tube
  245. 6GV8 at lowish voltage
  246. 703A tube source?
  247. Music Angel EL34 PP + 6N2 schematics ( MINIL3 )
  248. "Back To Back" transformers
  249. Dual HF small signal pentodes ?
  250. pre amp output delay circuit?

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