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  1. Another KT-88
  2. Rod Coleman filament supply circuit boards
  3. Losing the treble and transient response in this PX25 SE amp
  4. Calculating Zout for Pentode amp with NFB?
  5. Bypassing a volume pot
  6. Lab supply for cathode bias experiment question..
  7. Rheostat for adjustable "fixed" bias?
  8. Output transformer Question
  9. Real Cost of Decware Amplifiers
  10. Digitally driven tube pre-amp
  11. Real cost of Dynaco ST 70 Kits
  12. Oddball Console Amplifier
  13. Transistor phase splitter (Yaqin MC-84L)
  14. Shuguang to stop 845 and 211
  15. first project.
  16. Se Kt-66
  17. Is there a power supply guru?
  18. Direct Coupling question
  19. What's the best way to hook up an Isolation transformer
  20. Marzio &Jelasi's Direct Coupled SE Amp
  21. 6SN7 or 6SN7GT??
  22. HY40 Power Triode
  23. parallel capacitors in PS question
  24. Looking for feedback on Bottlehead amps
  25. First Watt F3 / Tube Audio Design TAD-125 Hibachi JFET amps
  26. S-5 Push Pull Power Supply Upgrade!
  27. Output Transformer Air Gap
  28. PCF80 -Designing a Pentode Constant Current Sink - help needed.
  29. Purity and simplicity of amp design
  30. DIY Dynaco ST70
  31. Help need some info on this Raytheon
  32. Isolating parallel feed amplifiers
  33. Please help for B+ problem!
  34. "Sallen-Key" Public domain?
  35. Transformer questions / Good headphones?
  36. Which Spud Amp?
  37. Very simple SE Triode Help
  38. Tube friendly speakers
  39. Counterpoint SA5000 schematic
  40. Yaqin MC-10L
  41. Screen Driven Dissimilar Pentode SE Anti-Triode Spud
  42. Power tube bias increasing with signal.
  43. Preamp suggestion required pls
  44. How to change deemphasis from 75uS to 50uS for Fisher FM100
  45. Which 300B ?
  46. Custom OT for 6C33C tube - any advice
  47. s-5 tube amp hum troubles
  48. Cathode feedback on Mikael's SE KT88?
  49. RCA tube rectifier
  50. 300B Schematic
  51. My first amp!
  52. Building a Aikido preamplifier
  53. Tube rolling causes failure...
  54. Briefly subjected heaters to about 12v by accident.
  55. She lives!
  56. Wilcox Gay 5U
  57. 6EM7 project: maybe use more sand?
  58. 12B4A SET - any critiques on this project?
  59. Heathkit Manual
  60. What is this??
  61. Amp and Speakers decision
  62. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  63. Counterpoint 3.1
  64. good book for learning the basics of tubes and tube amps
  65. Heater circuit - to twist or not to twist
  66. Rock and Flame: Wavebourn Barracuda
  67. Low voltage rectifiers?
  68. Horz Sweep amp Pent or screen drive
  69. Lessons learned building a 5VDC Power Supply for a 300B heater
  70. Getting frustrated--- amps and speakers for the noob
  71. Smallish chassis feasible? Multiple pics
  72. Using a Maida Regulator with a CCS
  73. Which Aikido pre-amp PCB for a newbie?
  74. FM transmitter / PA
  75. What value attenuator would you use in front of a 396A in a preamp?
  76. Hybrid OTL Circlotron idea
  77. Heathkit aa-121
  78. Help please checking my B+ design
  79. Selenium rectifiers
  80. isolation transformer - high voltage.
  81. Cathode Bypass in a PP Output Stage
  82. Mcintosh Tube Amplifier Protection Circuit
  83. Where to start? Or: cool these plates down
  84. Hum trouble on old PA amp
  85. Crazy newbie tube driver question
  86. UHF tubes for audio?
  87. Suggestion for this tube preamp
  88. 300B push pull amp
  89. Simple P-P 84 proto
  90. Keeping cost down?
  91. Tube Amp Kit for newbie
  92. 40% Tap direct to plate
  93. Funny bias problem in PP EL34. Please help
  94. Transformer from Heathkit A-7 amp
  95. Any tube stores in Burnaby, Vancouver, Canada?
  96. B+ time delay circuit - your comments
  97. PCB mount line input transformer question
  98. SRPP circuit question
  99. Russian tubes - what pin material?
  100. Auto-bias - easy to convert to or not?
  101. old style anode/grid caps
  102. 6H30 Dual Triode
  103. Why would the frequency response vary so much on a pair of Monoblock amps?
  104. Disassembling output transformer
  105. Tube sockets
  106. H. P. Friedrichs
  107. The Rebuilding of Theta KT-88 Tube amp.
  108. Please check my PS pcb board layout for problems????
  109. Help w/fixing counterpoint Sa7 preamp
  110. IXYS 10M45 CCS IC question
  111. Wing-C 300B tubes and opinions
  112. PX25 DRD Power amp.
  113. rectifier tube recommendation please
  114. 6C33C to more standard triode conversion - any ideas?
  115. PP EL84 Build Questions (Bevois Valley)
  116. Tube line stage output impedance
  117. volume between gain stages
  118. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  119. Next Project - Darling Amplifier or 45
  120. tube magazines
  121. PSU choke help please
  122. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  123. TubelabSE phase
  124. EML 300B XLS and Mesh comparison
  125. UL - triode switch
  126. Spud anyone?
  127. Nooo! Almost have this amp built!
  128. Need help - Old cap can ID
  129. 16SL7+6SN7 Aikido
  130. Anyone have a Bogen MX 60 Schematic they can post
  131. mc100b burned up
  132. DC heating, parallel diodes
  133. Identify Amperex Tube?
  134. Which speaker tap when going from UL to triode
  135. Tube wont bias...
  136. DIY stepped attenuator
  137. TV-7/DU KT88 Settings?
  138. Filmosound - Tone Knob - Tertiaries
  139. Hybrid Amp, Tube+MOS FET SE
  140. 3.1 integrated possible?
  141. Plate choke material, why to use amorphous core?
  142. Anything obviously wrong with my mic pre amp ?
  143. K-502 or Yamaha RX-V361 for Klipsch F-1?
  144. Help diagnosing phase-splitter
  145. question about Bruce's GGP preamp
  146. interpreting max. values listed in datasheet
  147. zenith mlt 15 console record player problem
  148. ORIENTED or Not ORIENTED cores for OPT
  149. Audio Research SP-3-A-1 modified.........
  150. Tube heaters in series.
  151. Output transformer listening impressions?
  152. Tube buffer 6H6P after a DAC
  153. S-5 K16LS in enclosure - Pics
  154. Time to mourn the death of Broskie's Tube CAD blog?
  155. 6N6P preamp
  156. our Preamplifier using 2J27S tubes
  157. dc filament design question
  158. 6AV6A for meter driver
  159. AC wiring heaters, A or B ?
  160. Aikido preamp muting
  161. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  162. hummming YAHA
  163. leave a variac on all the time!
  164. More triodes
  165. Full Wave Rectifier
  166. Blowing B+ fuse
  167. PSRR of CF w/ CCS Sink
  168. MENG Series "EL34B" Integrated Amplifier
  169. Concertina Parafeed, or How to mess with OldEurope's mind...
  170. Phono stage success!
  171. A few pretty pictures and an ugly picture
  172. Rectifier with slow start up?
  173. Calibrating an emission tester
  174. What is this?
  175. 4XKT88 drive
  176. EL84 driven 2a3
  177. need suggestions for "standarizing" tube gain stages
  178. How long until someone tries
  179. Common Audio Tubes in standard use
  180. tango input transformer NN-6
  181. Filmosound dual pot
  182. Hi power Moskido with A/B output Bias
  183. how easy to make tube amp?
  184. metal film resistors or carbon?
  185. Quad II tubes replacement
  186. Sirius & FM
  187. Can someone look at a Counterpoint SA7 for me?
  188. The Wintersweet High-Vividity Project
  189. loftin white 801 amp
  190. Pics of unique design of amp chassis?
  191. Heathkit AA-32 modifications / upgrades
  192. Tango XE-20S Specification
  193. Question about Edcor output transformer
  194. SE EL84 output stage?
  195. New ST-70 Driver board from Blackburn Audio
  196. Transformer primary rating question
  197. Heathkit A7(c?) Rebuild
  198. Rewiring a socket to take 6GK6 instead of 6BQ5
  199. 317 CCS Question
  200. Active filter design software
  201. Larry Moore 10Y Squared
  202. Do you hear “pop” when you turn off your amp?
  203. Simple tube phono stage
  204. Tube phono amp repair/redesign help wanted
  205. tube newbie needs guidance
  206. Interesting linestage optimizing ideas
  207. Powered up my Lafayette 224A for the first time!
  208. Passive BP filter sim results
  209. 100mA heater tubes for phono
  210. Audiotester + M-audio - info + question
  211. Indestructible HV hybrid regulator!
  212. yet another modified 5-20 amplifier
  213. help with OT for 15 watt tube amp
  214. Power supply for 12SL7 phono preamp
  215. few questions
  216. mystery 5881
  217. does lower B+ cause scratchy distortion?
  218. SY please keep us updated about your site
  219. Cleveland Ohio members?
  220. Scope tricks for detecting rectifier/choke switching
  221. To choke or not to choke
  222. Tube rectified LC PS for 6SN7 Aikido - choke DCR question
  223. Convergent Audio Technology (CAT) SL-1 preamplifier
  224. Very low current CCS?
  225. Morgan Jones' E88CC Phono
  226. pse help, unity µ triode as a phase inverter
  227. variable capacitor volume control
  228. What to do with P-P transformer ?
  229. 837 tube for SE Amplifier
  230. calculating transformer current draw question
  231. glass audio 1995 "Single Ended Glory"
  232. Manual for Heathkit AA-121 Power Amp
  233. Low gain triode recommendation plz
  234. Output transformer impedance question
  235. Choke... The side makes difference?
  236. Fostex Meets Pentode I need some NFB
  237. Oddball Sweep tubes in PP
  238. Noob - where to start?
  239. big doubt: dynakit st35 VS diytube st35clone
  240. Compactron Output Tubes
  241. XPP amp
  242. Getting only 400 hours on Class A2 PP tube
  243. Pete Millett's 829B amp -> monoblocks
  244. 6JU8A Spec confusion
  245. post on amp design by a newbie
  246. (INDIA) ECC802S/EL84 build, hardware requirements
  247. 6gw8 /ECL86 El Cheapo modifications
  248. Danielak's 300B design
  249. 6080 @ 800µA Question ...
  250. Groundplane layout theory

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