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  1. Transformer primary rating question
  2. Heathkit A7(c?) Rebuild
  3. Rewiring a socket to take 6GK6 instead of 6BQ5
  4. 317 CCS Question
  5. Active filter design software
  6. Larry Moore 10Y Squared
  7. Do you hear “pop” when you turn off your amp?
  8. Filmosound - Guitar - Ground
  9. Simple tube phono stage
  10. Tube phono amp repair/redesign help wanted
  11. Repairing a tape echo with tubes (Dynacord Echocord Super 62a)
  12. tube newbie needs guidance
  13. Interesting linestage optimizing ideas
  14. Powered up my Lafayette 224A for the first time!
  15. Hickok Upgrades
  16. Passive BP filter sim results
  17. 100mA heater tubes for phono
  18. Audiotester + M-audio - info + question
  19. Indestructible HV hybrid regulator!
  20. yet another modified 5-20 amplifier
  21. help with OT for 15 watt tube amp
  22. Power supply for 12SL7 phono preamp
  23. few questions
  24. mystery 5881
  25. does lower B+ cause scratchy distortion?
  26. SY please keep us updated about your site
  27. Cleveland Ohio members?
  28. Scope tricks for detecting rectifier/choke switching
  29. To choke or not to choke
  30. Tube rectified LC PS for 6SN7 Aikido - choke DCR question
  31. Convergent Audio Technology (CAT) SL-1 preamplifier
  32. Very low current CCS?
  33. Morgan Jones' E88CC Phono
  34. pse help, unity µ triode as a phase inverter
  35. variable capacitor volume control
  36. What to do with P-P transformer ?
  37. 837 tube for SE Amplifier
  38. calculating transformer current draw question
  39. glass audio 1995 "Single Ended Glory"
  40. Manual for Heathkit AA-121 Power Amp
  41. Low gain triode recommendation plz
  42. Tubelab PP question
  43. Output transformer impedance question
  44. Choke... The side makes difference?
  45. Tubelab...Why "sandy" SE amps?
  46. Fostex Meets Pentode I need some NFB
  47. Oddball Sweep tubes in PP
  48. Noob - where to start?
  49. big doubt: dynakit st35 VS diytube st35clone
  50. Compactron Output Tubes
  51. XPP amp
  52. Tubelab SE ... which 5AR4 ?
  53. Getting only 400 hours on Class A2 PP tube
  54. Pete Millett's 829B amp -> monoblocks
  55. 6JU8A Spec confusion
  56. post on amp design by a newbie
  57. (INDIA) ECC802S/EL84 build, hardware requirements
  58. 6gw8 /ECL86 El Cheapo modifications
  59. Danielak's 300B design
  60. 6080 @ 800µA Question ...
  61. Groundplane layout theory
  62. delay on for 83 mercury vapor
  63. Anyone tried "Weber Copper" SS rectifyers?
  64. Scored a bunch of tubes at HamCon
  65. AB2 Anyone else done similiar
  66. 6v6 pp amplifier
  67. Loud 60 cycle Hum from tube amp.
  68. Building a Preamp
  69. another Big One....:)
  70. JJ factory pictures ...
  71. Good enough CFs
  72. What's a good way to clean tubes w/o taking off the labeling?
  73. 6BX7 or 12B4A for small SE amp?
  74. Schematic collection posted by a kind soul...
  75. Dumb question, but...
  76. Zen Quad 22
  77. I'm baffled -- 6AK6 push-pull amp
  78. pin count question
  79. 1G3 Max Dissapation?
  80. Edcor Transformers
  81. 12EL6 preamp
  82. Request for EICO HF-20 experiences and ideas
  83. So would this work?
  84. A valve pre amp for my disco and electric guitar.
  85. Small-signal (or small power) pentode that can handle 400V (or more)?
  86. Are 6GM8's rare?
  87. How to lower mains voltage using resistors
  88. Music angel XD-SE EL34
  89. Potential project for some inherited transformers
  90. Car Tube Amp?
  91. Marantz 7 Preamp
  92. Euridice pramp but with 45
  93. Tubelab SE Parafeed Monoblocks (5 channel)
  94. Can 6AK6's take high voltages?
  95. Tube equal to one section of a 12AX7?
  96. HK 'Deuce front end on G2 drive output stage?
  97. Direct-coupled cathode/source follower driver in PP?
  98. CCS power supply loading..
  99. Photo Gallery -- Simple SE build
  100. Buying vintage good tubes
  101. current tube manufacturers and or brands
  102. PSU with TL783-question
  103. Hashimoto H-20-7U for 6v6 in triode SE..?
  104. Speakers impedance
  105. mesh plate el34 (supereTNT)
  106. Tagboard amps
  107. 807 single ended guitar amp
  108. Built the DDDAC MKII USB audio card, modified it to feed SRPP tube amp line stage
  109. 6CL6 vs. 12BY7A
  110. Suggestions for a good tube line amp
  111. 12el6
  112. High Squareness Ratio of a Transformer
  113. What causes a tube to crack?
  114. My 66 Fender bassman tube guitar amp is cutting out intermittently and is making a bl
  115. Ming Da MC-7R transformers for Quad 22 clone.
  116. SimpleSE and Switches
  117. Bias and distortion 6EM7
  118. Need ideas - 6L6GA & 6X5GT
  119. tube microphone preamp design ideas
  120. Firestone Air Chief
  121. Zenith Console find, amp suggestions?
  122. 5842 russian equiv 6S45P or 6C45PI ?
  123. bizarre or good topology idea?
  124. 12 EL6 car preamp
  125. Waxy substance leaking from vintage OPT
  126. Output transformer protection fuses
  127. 5670 SRPP DC coupled to 6S4A
  128. L as last filter element?
  129. Strong cigarette smell in a tube amp
  130. Gas coupling?
  131. Differences between nos Tesla E88CC?
  132. Harmonic parrot food?
  133. Modified 6V6 amp, 350 volt @ 250 K HZ output
  134. best current production el34
  135. Help for correct grounding a Dared VP-845
  136. two 6AL5s as a bridge rectifier
  137. JFET Switching on my tube amp
  138. Leak / Dynaco DIY
  139. S-5 tube amp kits
  140. I wanna build a CHEAP mono tube amp, need advice....
  141. 12ax7
  142. Testing for tube shorts
  143. KT66 alternatives in Quad II amps?
  144. FOR TUBE: 350V High Voltage Regulator
  145. what guideline to match pre and amp?
  146. New to list and 300B amp kits
  147. Krank 100w head w/ only 14v output
  148. Silvertone 1448 Output Transformer?
  149. Primary impedance output transformer
  150. isolation transformer
  151. Cloning transformers
  152. EAR509
  153. EL84 for Ipod and guitar
  154. Tubelab web site down, no more SimpleSE
  155. Schematics of potential interest
  156. super capacitor for dc heater
  157. Need a kit ??
  158. Edcor XSM10K/15K like intestage in tube SE ?
  159. Does anyone know of an LTSpice model for 12B4?
  160. where to order V-Cap ?
  161. Input Volume Pot
  162. Red Army Power-amp
  163. Cloning a HF-60
  164. Michaelson & Austin TVA-1 info
  165. analyze a circuit...quiescence current and R-Load
  166. how to calculate SE Coupling Cap Voltage ?
  167. Tubelab Simple SE Rectifier Problem?
  168. Mullard ECC88
  169. Engineering vs tube rolling
  170. Diode Peak working voltage ?
  171. Help wanted; combining topologies to "new" 807 PPP design ?
  172. Tubelab Simple SE with two Transformers - Centertaps?
  173. Hybrid Amp
  174. transformer information need help
  175. Replacing a cathode resistor with a CCS
  176. DC offset and relays
  177. Sourcing JJ 300B tubes
  178. EICO HF-12 Iron - Use in Guitar Amp?
  179. Decware Vs Rogue Audio
  180. Global Feedback on Mikael's KT88SE
  181. Generating big voltage swings without 'iron'
  182. 6AS7G Grid Voltage ??
  183. Next project 6EM7
  184. Anyone built a tube-based (6BE6 or 6HS8) volume control?
  185. What to replace these caps with?
  186. 5691 plate value ratings
  187. Bussiness trip to Singapore
  188. Paco mike tube amp
  189. Emergency help with Wes' amp
  190. 2A3 without cathode bypass cap???
  191. Best way to burn-in my new SE xfrmers on the bench?
  192. tubelabse pt wiring
  193. Need help with my ST70
  194. 6sn7 direct coupled and transformer coupled
  195. Hickok 605A Test 6DJ8
  196. Grounded Grid Preamp
  197. Beginner WLTM fixer of 300B hum...
  198. Bell 2420 tube amplifier. Bias question. 6v6 push pull
  199. How to figure gain on split-load with positive feedback?
  200. Mikaels KT88SE & VTV Octal Linestage
  201. idiot needs help making sense of funny squigles - Filmosound
  202. Custom Transformer?
  203. How are this schematic ?
  204. Need help with a Tube preamp Kit (6Z4, 6N3)
  205. data sheets for 7239 and 8068
  206. John Swenson's New BDT preamp
  207. no coupling caps
  208. 6SN7GT brand
  209. tube voltage regulator error amp
  210. driving 845's
  211. Just ordered a Korg EMX-1
  212. Maida for Screen Supply
  213. cracked el34 -> replacement squeals
  214. SimpleSE goes Push Pull
  215. Possibly defective Mullard 12AT7?
  216. Basic measurement question re: shorts
  217. EL84 DC 10Y Project
  218. TubeCad Journal FET CCS
  219. russian tube
  220. Source for #81 light bulb for Hickok Fuse
  221. pchw 's tube hybrid amp accurian info
  222. 3c24 se amp
  223. schematic of firstsoundaudio pre amp
  224. 300b-98c mesh bias
  225. 6SN7 coin base tubes
  226. tube rectifiers and electrolytic reforming w/ variac
  227. I'm running my leak stereo 20 single ended. WHAT???
  228. Varnish on old transformer
  229. SE parallel output questions
  230. Darius Loftin White explained
  231. best capacitor
  232. New Sensor's "Mullard" EL34 reissue?
  233. Best Way to Control Plate Voltage?
  234. Any Mods for a Noisy Leak Point one Stereo?
  235. tubes for 87db spendor
  236. 4v for rectifier tube
  237. Need help rebuilding old PA amplifier!
  238. inverted?
  239. Old Tube Radio - Restoration Project
  240. quick - need parts retailers Wash DC area
  241. H&K Tubeman Circuit Questions (added schematics!)
  242. Marshalls: Why did 600V B+ become 470V?
  243. Raising filament winding above cathode with a EZ81 in the circuit OK?
  244. Problem with Beard Audio
  245. 100K pot in a preamp?
  246. Motor Run Capacitor
  247. Power transformer for 6883B tube uses?
  248. EAGLE PCB help with socket on it
  249. Rca Mi-38188
  250. C- Battery Supply

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