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  1. DIY Dynaco ST70
  2. Help need some info on this Raytheon
  3. Isolating parallel feed amplifiers
  4. Please help for B+ problem!
  5. Second Tubelab Simple SE board done
  6. "Sallen-Key" Public domain?
  7. Transformer questions / Good headphones?
  8. Which Spud Amp?
  9. Very simple SE Triode Help
  10. Tube friendly speakers
  11. Counterpoint SA5000 schematic
  12. Yaqin MC-10L
  13. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  14. Power tube bias increasing with signal.
  15. Preamp suggestion required pls
  16. How to change deemphasis from 75uS to 50uS for Fisher FM100
  17. Which 300B ?
  18. Custom OT for 6C33C tube - any advice
  19. s-5 tube amp hum troubles
  20. Cathode feedback on Mikael's SE KT88?
  21. RCA tube rectifier
  22. 300B Schematic
  23. Tubelab wiring
  24. My first amp!
  25. Building a Aikido preamplifier
  26. Tube rolling causes failure...
  27. Briefly subjected heaters to about 12v by accident.
  28. She lives!
  29. Wilcox Gay 5U
  30. 6EM7 project: maybe use more sand?
  31. 12B4A SET - any critiques on this project?
  32. Heathkit Manual
  33. What is this??
  34. Amp and Speakers decision
  35. Hey guitar joe...
  36. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  37. counterpoint 3.1
  38. good book for learning the basics of tubes and tube amps
  39. Heater circuit - to twist or not to twist
  40. Rock and Flame: Wavebourn Barracuda
  41. Low voltage rectifiers?
  42. Horz Sweep amp Pent or screen drive
  43. Lessons learned building a 5VDC Power Supply for a 300B heater
  44. Getting frustrated--- amps and speakers for the noob
  45. Smallish chassis feasible? Multiple pics
  46. Using a Maida Regulator with a CCS
  47. Which Aikido pre-amp PCB for a newbie?
  48. Newbie wants to build Tubelab SE Monos.
  49. FM transmitter / PA
  50. What value attenuator would you use in front of a 396A in a preamp?
  51. Hybrid OTL Circlotron idea
  52. Heathkit aa-121
  53. Help please checking my B+ design
  54. Selenium rectifiers
  55. isolation transformer - high voltage.
  56. Cathode Bypass in a PP Output Stage
  57. Mcintosh Tube Amplifier Protection Circuit
  58. Where to start? Or: cool these plates down
  59. epiphone pacemaker 50 t
  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. Rickenbacher amp HELP!!!
  126. interpreting max. values listed in datasheet
  127. zenith mlt 15 console record player problem
  128. ORIENTED or Not ORIENTED cores for OPT
  129. Audio Research SP-3-A-1 modified.........
  130. Tube heaters in series.
  131. Output transformer listening impressions?
  132. Tube buffer 6H6P after a DAC
  133. S-5 K16LS in enclosure - Pics
  134. Time to mourn the death of Broskie's Tube CAD blog?
  135. 6N6P preamp
  136. our Preamplifier using 2J27S tubes
  137. dc filament design question
  138. 6AV6A for meter driver
  139. AC wiring heaters, A or B ?
  140. Aikido preamp muting
  141. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  142. hummming YAHA
  143. leave a variac on all the time!
  144. More triodes
  145. Full Wave Rectifier
  146. Blowing B+ fuse
  147. PSRR of CF w/ CCS Sink
  148. MENG Series "EL34B" Integrated Amplifier
  149. Concertina Parafeed, or How to mess with OldEurope's mind...
  150. Phono stage success!
  151. A few pretty pictures and an ugly picture
  152. Rectifier with slow start up?
  153. Calibrating an emission tester
  154. What is this?
  155. 4XKT88 drive
  156. EL84 driven 2a3
  157. need suggestions for "standarizing" tube gain stages
  158. How long until someone tries
  159. Hickok Photo History - hidden web gem!
  160. Common Audio Tubes in standard use
  161. tango input transformer NN-6
  162. Filmosound dual pot
  163. Hi power Moskido with A/B output Bias
  164. how easy to make tube amp?
  165. metal film resistors or carbon?
  166. Quad II tubes replacement
  167. Sirius & FM
  168. Can someone look at a Counterpoint SA7 for me?
  169. The Wintersweet High-Vividity Project
  170. loftin white 801 amp
  171. Pics of unique design of amp chassis?
  172. Heathkit AA-32 modifications / upgrades
  173. Tango XE-20S Specification
  174. Question about Edcor output transformer
  175. SE EL84 output stage?
  176. New ST-70 Driver board from Blackburn Audio
  177. Transformer primary rating question
  178. Heathkit A7(c?) Rebuild
  179. Rewiring a socket to take 6GK6 instead of 6BQ5
  180. 317 CCS Question
  181. Active filter design software
  182. Larry Moore 10Y Squared
  183. Do you hear “pop” when you turn off your amp?
  184. Filmosound - Guitar - Ground
  185. Simple tube phono stage
  186. Tube phono amp repair/redesign help wanted
  187. Repairing a tape echo with tubes (Dynacord Echocord Super 62a)
  188. tube newbie needs guidance
  189. Interesting linestage optimizing ideas
  190. Powered up my Lafayette 224A for the first time!
  191. Hickok Upgrades
  192. Passive BP filter sim results
  193. 100mA heater tubes for phono
  194. Audiotester + M-audio - info + question
  195. Indestructible HV hybrid regulator!
  196. yet another modified 5-20 amplifier
  197. help with OT for 15 watt tube amp
  198. Power supply for 12SL7 phono preamp
  199. few questions
  200. mystery 5881
  201. does lower B+ cause scratchy distortion?
  202. SY please keep us updated about your site
  203. Cleveland Ohio members?
  204. Scope tricks for detecting rectifier/choke switching
  205. To choke or not to choke
  206. Tube rectified LC PS for 6SN7 Aikido - choke DCR question
  207. Convergent Audio Technology (CAT) SL-1 preamplifier
  208. Very low current CCS?
  209. Morgan Jones' E88CC Phono
  210. pse help, unity µ triode as a phase inverter
  211. variable capacitor volume control
  212. What to do with P-P transformer ?
  213. 837 tube for SE Amplifier
  214. calculating transformer current draw question
  215. glass audio 1995 "Single Ended Glory"
  216. Manual for Heathkit AA-121 Power Amp
  217. Low gain triode recommendation plz
  218. Tubelab PP question
  219. Output transformer impedance question
  220. Choke... The side makes difference?
  221. Tubelab...Why "sandy" SE amps?
  222. Fostex Meets Pentode I need some NFB
  223. Oddball Sweep tubes in PP
  224. Noob - where to start?
  225. big doubt: dynakit st35 VS diytube st35clone
  226. Compactron Output Tubes
  227. XPP amp
  228. Tubelab SE ... which 5AR4 ?
  229. Getting only 400 hours on Class A2 PP tube
  230. Pete Millett's 829B amp -> monoblocks
  231. 6JU8A Spec confusion
  232. post on amp design by a newbie
  233. (INDIA) ECC802S/EL84 build, hardware requirements
  234. 6gw8 /ECL86 El Cheapo modifications
  235. Danielak's 300B design
  236. 6080 @ 800µA Question ...
  237. Groundplane layout theory
  238. delay on for 83 mercury vapor
  239. Anyone tried "Weber Copper" SS rectifyers?
  240. Scored a bunch of tubes at HamCon
  241. AB2 Anyone else done similiar
  242. 6v6 pp amplifier
  243. Loud 60 cycle Hum from tube amp.
  244. Building a Preamp
  245. another Big One....:)
  246. JJ factory pictures ...
  247. Good enough CFs
  248. What's a good way to clean tubes w/o taking off the labeling?
  249. 6BX7 or 12B4A for small SE amp?
  250. Schematic collection posted by a kind soul...

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