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  1. Second Tubelab Simple SE board done
  2. "Sallen-Key" Public domain?
  3. Transformer questions / Good headphones?
  4. Which Spud Amp?
  5. Very simple SE Triode Help
  6. Tube friendly speakers
  7. Counterpoint SA5000 schematic
  8. Yaqin MC-10L
  9. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  10. Power tube bias increasing with signal.
  11. Preamp suggestion required pls
  12. How to change deemphasis from 75uS to 50uS for Fisher FM100
  13. Which 300B ?
  14. Custom OT for 6C33C tube - any advice
  15. s-5 tube amp hum troubles
  16. Cathode feedback on Mikael's SE KT88?
  17. RCA tube rectifier
  18. 300B Schematic
  19. Tubelab wiring
  20. My first amp!
  21. Building a Aikido preamplifier
  22. Tube rolling causes failure...
  23. Briefly subjected heaters to about 12v by accident.
  24. She lives!
  25. Wilcox Gay 5U
  26. 6EM7 project: maybe use more sand?
  27. 12B4A SET - any critiques on this project?
  28. Heathkit Manual
  29. What is this??
  30. Amp and Speakers decision
  31. Hey guitar joe...
  32. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  33. counterpoint 3.1
  34. good book for learning the basics of tubes and tube amps
  35. Heater circuit - to twist or not to twist
  36. Rock and Flame: Wavebourn Barracuda
  37. Low voltage rectifiers?
  38. Horz Sweep amp Pent or screen drive
  39. Lessons learned building a 5VDC Power Supply for a 300B heater
  40. Getting frustrated--- amps and speakers for the noob
  41. Smallish chassis feasible? Multiple pics
  42. Using a Maida Regulator with a CCS
  43. Which Aikido pre-amp PCB for a newbie?
  44. Newbie wants to build Tubelab SE Monos.
  45. FM transmitter / PA
  46. What value attenuator would you use in front of a 396A in a preamp?
  47. Hybrid OTL Circlotron idea
  48. Heathkit aa-121
  49. Help please checking my B+ design
  50. Selenium rectifiers
  51. isolation transformer - high voltage.
  52. Cathode Bypass in a PP Output Stage
  53. Mcintosh Tube Amplifier Protection Circuit
  54. Where to start? Or: cool these plates down
  55. epiphone pacemaker 50 t
  56. Hum trouble on old PA amp
  57. Crazy newbie tube driver question
  58. UHF tubes for audio?
  59. Suggestion for this tube preamp
  60. PCB Board software?
  61. 300B push pull amp
  62. Simple P-P 84 proto
  63. Keeping cost down?
  64. Tube Amp Kit for newbie
  65. 40% Tap direct to plate
  66. Funny bias problem in PP EL34. Please help
  67. Transformer from Heathkit A-7 amp
  68. Any tube stores in Burnaby, Vancouver, Canada?
  69. B+ time delay circuit - your comments
  70. PCB mount line input transformer question
  71. SRPP circuit question
  72. Russian tubes - what pin material?
  73. Auto-bias - easy to convert to or not?
  74. old style anode/grid caps
  75. 6H30 Dual Triode
  76. Why would the frequency response vary so much on a pair of Monoblock amps?
  77. Disassembling output transformer
  78. Tube sockets
  79. H. P. Friedrichs
  80. The Rebuilding of Theta KT-88 Tube amp.
  81. Please check my PS pcb board layout for problems????
  82. glass capacitors
  83. Help w/fixing counterpoint Sa7 preamp
  84. IXYS 10M45 CCS IC question
  85. Wing-C 300B tubes and opinions
  86. PX25 DRD Power amp.
  87. rectifier tube recommendation please
  88. 6C33C to more standard triode conversion - any ideas?
  89. PP EL84 Build Questions (Bevois Valley)
  90. Tube line stage output impedance
  91. volume between gain stages
  92. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  93. Next Project - Darling Amplifier or 45
  94. tube magazines
  95. PSU choke help please
  96. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  97. TubelabSE phase
  98. EML 300B XLS and Mesh comparison
  99. UL - triode switch
  100. Spud anyone?
  101. Nooo! Almost have this amp built!
  102. Need help - Old cap can ID
  103. 16SL7+6SN7 Aikido
  104. 1600Hz Transformer?
  105. Anyone have a Bogen MX 60 Schematic they can post
  106. mc100b burned up
  107. DC heating, parallel diodes
  108. Identify Amperex Tube?
  109. Which speaker tap when going from UL to triode
  110. Tube wont bias...
  111. DIY stepped attenuator
  112. TV-7/DU KT88 Settings?
  113. Filmosound - Tone Knob - Tertiaries
  114. Hybrid Amp, Tube+MOS FET SE
  115. 3.1 integrated possible?
  116. Plate choke material, why to use amorphous core?
  117. Anything obviously wrong with my mic pre amp ?
  118. K-502 or Yamaha RX-V361 for Klipsch F-1?
  119. Help diagnosing phase-splitter
  120. question about Bruce's GGP preamp
  121. Rickenbacher amp HELP!!!
  122. interpreting max. values listed in datasheet
  123. zenith mlt 15 console record player problem
  124. ORIENTED or Not ORIENTED cores for OPT
  125. Audio Research SP-3-A-1 modified.........
  126. Tube heaters in series.
  127. Output transformer listening impressions?
  128. Tube buffer 6H6P after a DAC
  129. S-5 K16LS in enclosure - Pics
  130. Time to mourn the death of Broskie's Tube CAD blog?
  131. 6N6P preamp
  132. our Preamplifier using 2J27S tubes
  133. dc filament design question
  134. 6AV6A for meter driver
  135. AC wiring heaters, A or B ?
  136. Aikido preamp muting
  137. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  138. hummming YAHA
  139. leave a variac on all the time!
  140. More triodes
  141. Full Wave Rectifier
  142. Blowing B+ fuse
  143. PSRR of CF w/ CCS Sink
  144. MENG Series "EL34B" Integrated Amplifier
  145. Concertina Parafeed, or How to mess with OldEurope's mind...
  146. Phono stage success!
  147. A few pretty pictures and an ugly picture
  148. Rectifier with slow start up?
  149. Calibrating an emission tester
  150. What is this?
  151. 4XKT88 drive
  152. EL84 driven 2a3
  153. need suggestions for "standarizing" tube gain stages
  154. How long until someone tries
  155. Hickok Photo History - hidden web gem!
  156. Common Audio Tubes in standard use
  157. tango input transformer NN-6
  158. Filmosound dual pot
  159. Hi power Moskido with A/B output Bias
  160. how easy to make tube amp?
  161. metal film resistors or carbon?
  162. Quad II tubes replacement
  163. Sirius & FM
  164. Can someone look at a Counterpoint SA7 for me?
  165. The Wintersweet High-Vividity Project
  166. loftin white 801 amp
  167. Pics of unique design of amp chassis?
  168. Heathkit AA-32 modifications / upgrades
  169. Tango XE-20S Specification
  170. Question about Edcor output transformer
  171. SE EL84 output stage?
  172. New ST-70 Driver board from Blackburn Audio
  173. Transformer primary rating question
  174. Heathkit A7(c?) Rebuild
  175. Rewiring a socket to take 6GK6 instead of 6BQ5
  176. 317 CCS Question
  177. Active filter design software
  178. Larry Moore 10Y Squared
  179. Do you hear “pop” when you turn off your amp?
  180. Filmosound - Guitar - Ground
  181. Simple tube phono stage
  182. Tube phono amp repair/redesign help wanted
  183. Repairing a tape echo with tubes (Dynacord Echocord Super 62a)
  184. tube newbie needs guidance
  185. Interesting linestage optimizing ideas
  186. Powered up my Lafayette 224A for the first time!
  187. Hickok Upgrades
  188. Passive BP filter sim results
  189. 100mA heater tubes for phono
  190. Audiotester + M-audio - info + question
  191. Indestructible HV hybrid regulator!
  192. yet another modified 5-20 amplifier
  193. help with OT for 15 watt tube amp
  194. Power supply for 12SL7 phono preamp
  195. few questions
  196. mystery 5881
  197. does lower B+ cause scratchy distortion?
  198. SY please keep us updated about your site
  199. Cleveland Ohio members?
  200. Scope tricks for detecting rectifier/choke switching
  201. To choke or not to choke
  202. Tube rectified LC PS for 6SN7 Aikido - choke DCR question
  203. Convergent Audio Technology (CAT) SL-1 preamplifier
  204. Very low current CCS?
  205. Morgan Jones' E88CC Phono
  206. pse help, unity µ triode as a phase inverter
  207. variable capacitor volume control
  208. What to do with P-P transformer ?
  209. 837 tube for SE Amplifier
  210. calculating transformer current draw question
  211. glass audio 1995 "Single Ended Glory"
  212. Manual for Heathkit AA-121 Power Amp
  213. Low gain triode recommendation plz
  214. Tubelab PP question
  215. Output transformer impedance question
  216. Choke... The side makes difference?
  217. Tubelab...Why "sandy" SE amps?
  218. Fostex Meets Pentode I need some NFB
  219. Oddball Sweep tubes in PP
  220. Noob - where to start?
  221. big doubt: dynakit st35 VS diytube st35clone
  222. Compactron Output Tubes
  223. XPP amp
  224. Tubelab SE ... which 5AR4 ?
  225. Getting only 400 hours on Class A2 PP tube
  226. Pete Millett's 829B amp -> monoblocks
  227. 6JU8A Spec confusion
  228. post on amp design by a newbie
  229. (INDIA) ECC802S/EL84 build, hardware requirements
  230. 6gw8 /ECL86 El Cheapo modifications
  231. Danielak's 300B design
  232. 6080 @ 800µA Question ...
  233. Groundplane layout theory
  234. delay on for 83 mercury vapor
  235. Anyone tried "Weber Copper" SS rectifyers?
  236. Scored a bunch of tubes at HamCon
  237. AB2 Anyone else done similiar
  238. 6v6 pp amplifier
  239. Loud 60 cycle Hum from tube amp.
  240. Building a Preamp
  241. another Big One....:)
  242. JJ factory pictures ...
  243. Good enough CFs
  244. What's a good way to clean tubes w/o taking off the labeling?
  245. 6BX7 or 12B4A for small SE amp?
  246. Schematic collection posted by a kind soul...
  247. Dumb question, but...
  248. Zen Quad 22
  249. I'm baffled -- 6AK6 push-pull amp
  250. pin count question

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