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  1. Built the DDDAC MKII USB audio card, modified it to feed SRPP tube amp line stage
  2. 6CL6 vs. 12BY7A
  3. Suggestions for a good tube line amp
  4. 12el6
  5. High Squareness Ratio of a Transformer
  6. What causes a tube to crack?
  7. My 66 Fender bassman tube guitar amp is cutting out intermittently and is making a bl
  8. Ming Da MC-7R transformers for Quad 22 clone.
  9. SimpleSE and Switches
  10. Bias and distortion 6EM7
  11. Need ideas - 6L6GA & 6X5GT
  12. tube microphone preamp design ideas
  13. Firestone Air Chief
  14. Zenith Console find, amp suggestions?
  15. 5842 russian equiv 6S45P or 6C45PI ?
  16. bizarre or good topology idea?
  17. 12 EL6 car preamp
  18. Waxy substance leaking from vintage OPT
  19. Output transformer protection fuses
  20. 5670 SRPP DC coupled to 6S4A
  21. L as last filter element?
  22. Strong cigarette smell in a tube amp
  23. Gas coupling?
  24. Differences between nos Tesla E88CC?
  25. Harmonic parrot food?
  26. Modified 6V6 amp, 350 volt @ 250 K HZ output
  27. best current production el34
  28. Help for correct grounding a Dared VP-845
  29. two 6AL5s as a bridge rectifier
  30. JFET Switching on my tube amp
  31. Leak / Dynaco DIY
  32. S-5 tube amp kits
  33. I wanna build a CHEAP mono tube amp, need advice....
  34. 12ax7
  35. Testing for tube shorts
  36. KT66 alternatives in Quad II amps?
  37. FOR TUBE: 350V High Voltage Regulator
  38. what guideline to match pre and amp?
  39. New to list and 300B amp kits
  40. Krank 100w head w/ only 14v output
  41. Silvertone 1448 Output Transformer?
  42. Primary impedance output transformer
  43. isolation transformer
  44. Cloning transformers
  45. EAR509
  46. EL84 for Ipod and guitar
  47. Tubelab web site down, no more SimpleSE
  48. Schematics of potential interest
  49. super capacitor for dc heater
  50. Need a kit ??
  51. Edcor XSM10K/15K like intestage in tube SE ?
  52. Does anyone know of an LTSpice model for 12B4?
  53. where to order V-Cap ?
  54. Input Volume Pot
  55. Red Army Power-amp
  56. Cloning a HF-60
  57. Michaelson & Austin TVA-1 info
  58. analyze a circuit...quiescence current and R-Load
  59. how to calculate SE Coupling Cap Voltage ?
  60. Tubelab Simple SE Rectifier Problem?
  61. Mullard ECC88
  62. Engineering vs tube rolling
  63. Diode Peak working voltage ?
  64. Help wanted; combining topologies to "new" 807 PPP design ?
  65. Tubelab Simple SE with two Transformers - Centertaps?
  66. Hybrid Amp
  67. transformer information need help
  68. Replacing a cathode resistor with a CCS
  69. DC offset and relays
  70. Sourcing JJ 300B tubes
  71. EICO HF-12 Iron - Use in Guitar Amp?
  72. Decware Vs Rogue Audio
  73. Global Feedback on Mikael's KT88SE
  74. Generating big voltage swings without 'iron'
  75. 6AS7G Grid Voltage ??
  76. Next project 6EM7
  77. Anyone built a tube-based (6BE6 or 6HS8) volume control?
  78. What to replace these caps with?
  79. 5691 plate value ratings
  80. Bussiness trip to Singapore
  81. Paco mike tube amp
  82. Emergency help with Wes' amp
  83. 2A3 without cathode bypass cap???
  84. Best way to burn-in my new SE xfrmers on the bench?
  85. tubelabse pt wiring
  86. Need help with my ST70
  87. 6sn7 direct coupled and transformer coupled
  88. Hickok 605A Test 6DJ8
  89. Grounded Grid Preamp
  90. Beginner WLTM fixer of 300B hum...
  91. Bell 2420 tube amplifier. Bias question. 6v6 push pull
  92. How to figure gain on split-load with positive feedback?
  93. Mikaels KT88SE & VTV Octal Linestage
  94. idiot needs help making sense of funny squigles - Filmosound
  95. Custom Transformer?
  96. How are this schematic ?
  97. Need help with a Tube preamp Kit (6Z4, 6N3)
  98. data sheets for 7239 and 8068
  99. John Swenson's New BDT preamp
  100. no coupling caps
  101. 6SN7GT brand
  102. tube voltage regulator error amp
  103. driving 845's
  104. Just ordered a Korg EMX-1
  105. Maida for Screen Supply
  106. cracked el34 -> replacement squeals
  107. SimpleSE goes Push Pull
  108. Possibly defective Mullard 12AT7?
  109. Basic measurement question re: shorts
  110. EL84 DC 10Y Project
  111. TubeCad Journal FET CCS
  112. russian tube
  113. Source for #81 light bulb for Hickok Fuse
  114. pchw 's tube hybrid amp accurian info
  115. 3c24 se amp
  116. schematic of firstsoundaudio pre amp
  117. 300b-98c mesh bias
  118. 6SN7 coin base tubes
  119. tube rectifiers and electrolytic reforming w/ variac
  120. I'm running my leak stereo 20 single ended. WHAT???
  121. Varnish on old transformer
  122. SE parallel output questions
  123. Darius Loftin White explained
  124. best capacitor
  125. New Sensor's "Mullard" EL34 reissue?
  126. Best Way to Control Plate Voltage?
  127. Any Mods for a Noisy Leak Point one Stereo?
  128. tubes for 87db spendor
  129. 4v for rectifier tube
  130. Need help rebuilding old PA amplifier!
  131. inverted?
  132. Old Tube Radio - Restoration Project
  133. quick - need parts retailers Wash DC area
  134. H&K Tubeman Circuit Questions (added schematics!)
  135. Marshalls: Why did 600V B+ become 470V?
  136. Raising filament winding above cathode with a EZ81 in the circuit OK?
  137. Problem with Beard Audio
  138. 100K pot in a preamp?
  139. Motor Run Capacitor
  140. Power transformer for 6883B tube uses?
  141. EAGLE PCB help with socket on it
  142. Rca Mi-38188
  143. C- Battery Supply
  144. Seperating Preamp from Amp in Integrated Amps
  145. Wind my own output transformer for 100w bass amp
  146. Please help me in getting rid of the buzz.
  147. Tube Phono stage dilema
  148. Grounding with single tap secondary...
  149. VTL - Manley stereo 75
  150. What about KT100 in SE ?
  151. Tube amplifier kit needed to drive low efficiency speaker
  152. feeling very pleased with myself
  153. Quicksilver Retube
  154. My Totem Arro 4 ohm load on KT-88 based amp
  155. using flash camera (and maybe laptop screen or fluorescent) inverters to power tubes
  156. for fans of the EL38 - the E3375
  157. 811a Opt
  158. Guitar amp for Wes is running!
  159. Pure class-A or class AB?
  160. 12B4 PP Full Differential Amp Notion
  161. My opinion on Audio Note M10 schematic - Japan version
  162. B&K 650 tubecharts
  163. Help, I need your advice - What Next?
  164. Sloppy, Unreadable, Childlike schematics
  165. Anybody going to tomorrow's NVCF fair in Leamington?
  166. Randall RGT 100 Amp Problem
  167. Pete's SE E-Linear
  168. 0A2 or 0D3 ?
  169. Counterpoint SA7 modification.. shottky diodes.. thoughts?
  170. LTP feedback
  171. Need help with my super six...
  172. EL509 as a CF
  173. SE Diode
  174. 6FD7, 6BM8 or other
  175. My OLD Project....... cheap tube audio project!!!
  176. tube noise
  177. Fisher 400 questions
  178. RL12P35 amplifier
  179. 6AS7 ppp
  180. 6j5 dc coupled to 12b4a as 2a3 driver
  181. '81 Twin problems
  182. The sound of different EL34īs.
  183. Output transformer and FB
  184. Triode curves for 6AU5
  185. 26/el-84 amp possible..?
  186. Vaic 52B monos
  187. Hour Meter for a Tube Amp..
  188. volume pot replacement
  189. Any Ampeg SVT-II (non-pro) schematics???
  190. Ampex 600
  191. Tubing Testing...how are these numbers?
  192. No-R No-C Power Supply
  193. Are my Speakers efficient enough for my Amp?
  194. doesn't sound quite right
  195. 6DJ8 alternates?
  196. Is this the dumbest question?
  197. Fuse between B+ and output transformer?
  198. Telefunken Double Label Error...Ever seen this?
  199. 300B Summer Build Question
  200. 1,25kW tube amplifier/modulator
  201. 12sn7 heater-cathode voltage
  202. Toroidal output transformers with screen drive- why not?
  203. Help With 6v6 Spice Model
  204. Different 5AR4's have different voltages and warm up time.
  205. Edcor OPT in S5 Electronics K-16LS kit?
  206. SRPP Powersupply, replace R with choke ?
  207. First tube amp
  208. Best low-signal direct heated triodes?
  209. 25-position switched attenuator using a pair of 5-position switches?
  210. Help with dead Jadis Defy7 Amp
  211. Bring test points to chassis - Tubelab
  212. Heads up! New unbuilt Dynaco ST-70 kit on ebay
  213. Remote control for integrated tube amp
  214. EL34 pp "fixed" bias is wandering
  215. US sources Russian Surplus
  216. 6550 SE class project (continued)
  217. Convert RCA tuner/pre to high perf AM only
  218. Metal Can 6CA7s
  219. Bypassing B+ in PP amp
  220. Tube shunt regulator for phono amp
  221. Triplett tube tester help
  222. Motor run Caps Question
  223. speaker that can be driven by tube amp
  224. Which perf board?
  225. Looking for schematic/info for a Knight KN 3050 PA Amp
  226. Need help with volume control.
  227. Flame triodes!
  228. make OPT
  229. Tube GU50 made in Russia
  230. Expectations of new tube specs
  231. DC on preamp input
  232. We're up and going!
  233. Putting serial number on tubes
  234. Which of these tubes is best?
  235. Stepped attenuator resistor calculation software
  236. Help with PSU for tube DAC output stage
  237. single-tube (6GN8) amplifier?
  238. Dukane schematic needed
  239. Bloody pinouts!
  240. Testing 5651WA on the bench
  241. phase splitter concerns ?
  242. phono pre RIAA 2001
  243. Quick output transformer wiring question
  244. Can I.....
  245. Cathode FB P.P. Strange behaviour.
  246. Historic Valve Assembly Vids Mullard Content
  247. Unknown output impedance
  248. Any matching in 12AT7 sections? (SimpleSE)
  249. Over-voltage on heaters...
  250. Stray capacitance of CCS

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