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

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