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  1. Preamp suggestion required pls
  2. How to change deemphasis from 75uS to 50uS for Fisher FM100
  3. Which 300B ?
  4. Custom OT for 6C33C tube - any advice
  5. s-5 tube amp hum troubles
  6. Cathode feedback on Mikael's SE KT88?
  7. RCA tube rectifier
  8. 300B Schematic
  9. Tubelab wiring
  10. My first amp!
  11. Building a Aikido preamplifier
  12. Tube rolling causes failure...
  13. Briefly subjected heaters to about 12v by accident.
  14. She lives!
  15. Wilcox Gay 5U
  16. 6EM7 project: maybe use more sand?
  17. 12B4A SET - any critiques on this project?
  18. Heathkit Manual
  19. What is this??
  20. Amp and Speakers decision
  21. Hey guitar joe...
  22. Question about Low Impedence Filters on a Bogen PA Head Need Info.
  23. counterpoint 3.1
  24. good book for learning the basics of tubes and tube amps
  25. Heater circuit - to twist or not to twist
  26. Rock and Flame: Wavebourn Barracuda
  27. Low voltage rectifiers?
  28. Horz Sweep amp Pent or screen drive
  29. Lessons learned building a 5VDC Power Supply for a 300B heater
  30. Getting frustrated--- amps and speakers for the noob
  31. Smallish chassis feasible? Multiple pics
  32. Using a Maida Regulator with a CCS
  33. Which Aikido pre-amp PCB for a newbie?
  34. Newbie wants to build Tubelab SE Monos.
  35. FM transmitter / PA
  36. What value attenuator would you use in front of a 396A in a preamp?
  37. Hybrid OTL Circlotron idea
  38. Heathkit aa-121
  39. Help please checking my B+ design
  40. Selenium rectifiers
  41. isolation transformer - high voltage.
  42. Cathode Bypass in a PP Output Stage
  43. Mcintosh Tube Amplifier Protection Circuit
  44. Where to start? Or: cool these plates down
  45. epiphone pacemaker 50 t
  46. Hum trouble on old PA amp
  47. Crazy newbie tube driver question
  48. UHF tubes for audio?
  49. Suggestion for this tube preamp
  50. PCB Board software?
  51. 300B push pull amp
  52. Simple P-P 84 proto
  53. Keeping cost down?
  54. Tube Amp Kit for newbie
  55. 40% Tap direct to plate
  56. Funny bias problem in PP EL34. Please help
  57. Transformer from Heathkit A-7 amp
  58. Any tube stores in Burnaby, Vancouver, Canada?
  59. B+ time delay circuit - your comments
  60. PCB mount line input transformer question
  61. SRPP circuit question
  62. Russian tubes - what pin material?
  63. Auto-bias - easy to convert to or not?
  64. old style anode/grid caps
  65. 6H30 Dual Triode
  66. Why would the frequency response vary so much on a pair of Monoblock amps?
  67. Disassembling output transformer
  68. Tube sockets
  69. H. P. Friedrichs
  70. The Rebuilding of Theta KT-88 Tube amp.
  71. Please check my PS pcb board layout for problems????
  72. glass capacitors
  73. Help w/fixing counterpoint Sa7 preamp
  74. IXYS 10M45 CCS IC question
  75. Wing-C 300B tubes and opinions
  76. PX25 DRD Power amp.
  77. rectifier tube recommendation please
  78. 6C33C to more standard triode conversion - any ideas?
  79. PP EL84 Build Questions (Bevois Valley)
  80. Tube line stage output impedance
  81. volume between gain stages
  82. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  83. Next Project - Darling Amplifier or 45
  84. tube magazines
  85. PSU choke help please
  86. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  87. TubelabSE phase
  88. EML 300B XLS and Mesh comparison
  89. UL - triode switch
  90. Spud anyone?
  91. Nooo! Almost have this amp built!
  92. Need help - Old cap can ID
  93. 16SL7+6SN7 Aikido
  94. 1600Hz Transformer?
  95. Anyone have a Bogen MX 60 Schematic they can post
  96. mc100b burned up
  97. DC heating, parallel diodes
  98. Identify Amperex Tube?
  99. Which speaker tap when going from UL to triode
  100. Tube wont bias...
  101. DIY stepped attenuator
  102. TV-7/DU KT88 Settings?
  103. Filmosound - Tone Knob - Tertiaries
  104. Hybrid Amp, Tube+MOS FET SE
  105. 3.1 integrated possible?
  106. Plate choke material, why to use amorphous core?
  107. Anything obviously wrong with my mic pre amp ?
  108. K-502 or Yamaha RX-V361 for Klipsch F-1?
  109. Help diagnosing phase-splitter
  110. question about Bruce's GGP preamp
  111. Rickenbacher amp HELP!!!
  112. interpreting max. values listed in datasheet
  113. zenith mlt 15 console record player problem
  114. ORIENTED or Not ORIENTED cores for OPT
  115. Audio Research SP-3-A-1 modified.........
  116. Tube heaters in series.
  117. Output transformer listening impressions?
  118. Tube buffer 6H6P after a DAC
  119. S-5 K16LS in enclosure - Pics
  120. Time to mourn the death of Broskie's Tube CAD blog?
  121. 6N6P preamp
  122. our Preamplifier using 2J27S tubes
  123. dc filament design question
  124. 6AV6A for meter driver
  125. AC wiring heaters, A or B ?
  126. Aikido preamp muting
  127. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  128. hummming YAHA
  129. leave a variac on all the time!
  130. More triodes
  131. Full Wave Rectifier
  132. Blowing B+ fuse
  133. PSRR of CF w/ CCS Sink
  134. MENG Series "EL34B" Integrated Amplifier
  135. Concertina Parafeed, or How to mess with OldEurope's mind...
  136. Phono stage success!
  137. A few pretty pictures and an ugly picture
  138. Rectifier with slow start up?
  139. Calibrating an emission tester
  140. What is this?
  141. 4XKT88 drive
  142. EL84 driven 2a3
  143. need suggestions for "standarizing" tube gain stages
  144. How long until someone tries
  145. Hickok Photo History - hidden web gem!
  146. Common Audio Tubes in standard use
  147. tango input transformer NN-6
  148. Filmosound dual pot
  149. Hi power Moskido with A/B output Bias
  150. how easy to make tube amp?
  151. metal film resistors or carbon?
  152. Quad II tubes replacement
  153. Sirius & FM
  154. Can someone look at a Counterpoint SA7 for me?
  155. The Wintersweet High-Vividity Project
  156. loftin white 801 amp
  157. Pics of unique design of amp chassis?
  158. Heathkit AA-32 modifications / upgrades
  159. Tango XE-20S Specification
  160. Question about Edcor output transformer
  161. SE EL84 output stage?
  162. New ST-70 Driver board from Blackburn Audio
  163. Transformer primary rating question
  164. Heathkit A7(c?) Rebuild
  165. Rewiring a socket to take 6GK6 instead of 6BQ5
  166. 317 CCS Question
  167. Active filter design software
  168. Larry Moore 10Y Squared
  169. Do you hear “pop” when you turn off your amp?
  170. Filmosound - Guitar - Ground
  171. Simple tube phono stage
  172. Tube phono amp repair/redesign help wanted
  173. Repairing a tape echo with tubes (Dynacord Echocord Super 62a)
  174. tube newbie needs guidance
  175. Interesting linestage optimizing ideas
  176. Powered up my Lafayette 224A for the first time!
  177. Hickok Upgrades
  178. Passive BP filter sim results
  179. 100mA heater tubes for phono
  180. Audiotester + M-audio - info + question
  181. Indestructible HV hybrid regulator!
  182. yet another modified 5-20 amplifier
  183. help with OT for 15 watt tube amp
  184. Power supply for 12SL7 phono preamp
  185. few questions
  186. mystery 5881
  187. does lower B+ cause scratchy distortion?
  188. SY please keep us updated about your site
  189. Cleveland Ohio members?
  190. Scope tricks for detecting rectifier/choke switching
  191. To choke or not to choke
  192. Tube rectified LC PS for 6SN7 Aikido - choke DCR question
  193. Convergent Audio Technology (CAT) SL-1 preamplifier
  194. Very low current CCS?
  195. Morgan Jones' E88CC Phono
  196. pse help, unity µ triode as a phase inverter
  197. variable capacitor volume control
  198. What to do with P-P transformer ?
  199. 837 tube for SE Amplifier
  200. calculating transformer current draw question
  201. glass audio 1995 "Single Ended Glory"
  202. Manual for Heathkit AA-121 Power Amp
  203. Low gain triode recommendation plz
  204. Tubelab PP question
  205. Output transformer impedance question
  206. Choke... The side makes difference?
  207. Tubelab...Why "sandy" SE amps?
  208. Fostex Meets Pentode I need some NFB
  209. Oddball Sweep tubes in PP
  210. Noob - where to start?
  211. big doubt: dynakit st35 VS diytube st35clone
  212. Compactron Output Tubes
  213. XPP amp
  214. Tubelab SE ... which 5AR4 ?
  215. Getting only 400 hours on Class A2 PP tube
  216. Pete Millett's 829B amp -> monoblocks
  217. 6JU8A Spec confusion
  218. post on amp design by a newbie
  219. (INDIA) ECC802S/EL84 build, hardware requirements
  220. 6gw8 /ECL86 El Cheapo modifications
  221. Danielak's 300B design
  222. 6080 @ 800µA Question ...
  223. Groundplane layout theory
  224. delay on for 83 mercury vapor
  225. Anyone tried "Weber Copper" SS rectifyers?
  226. Scored a bunch of tubes at HamCon
  227. AB2 Anyone else done similiar
  228. 6v6 pp amplifier
  229. Loud 60 cycle Hum from tube amp.
  230. Building a Preamp
  231. another Big One....:)
  232. JJ factory pictures ...
  233. Good enough CFs
  234. What's a good way to clean tubes w/o taking off the labeling?
  235. 6BX7 or 12B4A for small SE amp?
  236. Schematic collection posted by a kind soul...
  237. Dumb question, but...
  238. Zen Quad 22
  239. I'm baffled -- 6AK6 push-pull amp
  240. pin count question
  241. 1G3 Max Dissapation?
  242. Edcor Transformers
  243. 12EL6 preamp
  244. Request for EICO HF-20 experiences and ideas
  245. So would this work?
  246. A valve pre amp for my disco and electric guitar.
  247. Small-signal (or small power) pentode that can handle 400V (or more)?
  248. Are 6GM8's rare?
  249. How to lower mains voltage using resistors
  250. Music angel XD-SE EL34

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