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

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