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  1. Transformer from Heathkit A-7 amp
  2. Any tube stores in Burnaby, Vancouver, Canada?
  3. B+ time delay circuit - your comments
  4. PCB mount line input transformer question
  5. SRPP circuit question
  6. Russian tubes - what pin material?
  7. Auto-bias - easy to convert to or not?
  8. old style anode/grid caps
  9. 6H30 Dual Triode
  10. Why would the frequency response vary so much on a pair of Monoblock amps?
  11. Disassembling output transformer
  12. Tube sockets
  13. H. P. Friedrichs
  14. The Rebuilding of Theta KT-88 Tube amp.
  15. Please check my PS pcb board layout for problems????
  16. glass capacitors
  17. Help w/fixing counterpoint Sa7 preamp
  18. IXYS 10M45 CCS IC question
  19. Wing-C 300B tubes and opinions
  20. PX25 DRD Power amp.
  21. rectifier tube recommendation please
  22. 6C33C to more standard triode conversion - any ideas?
  23. PP EL84 Build Questions (Bevois Valley)
  24. Tube line stage output impedance
  25. volume between gain stages
  26. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  27. Next Project - Darling Amplifier or 45
  28. tube magazines
  29. PSU choke help please
  30. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  31. TubelabSE phase
  32. EML 300B XLS and Mesh comparison
  33. UL - triode switch
  34. Spud anyone?
  35. Nooo! Almost have this amp built!
  36. Need help - Old cap can ID
  37. 16SL7+6SN7 Aikido
  38. 1600Hz Transformer?
  39. Anyone have a Bogen MX 60 Schematic they can post
  40. mc100b burned up
  41. DC heating, parallel diodes
  42. Identify Amperex Tube?
  43. Which speaker tap when going from UL to triode
  44. Tube wont bias...
  45. DIY stepped attenuator
  46. TV-7/DU KT88 Settings?
  47. Filmosound - Tone Knob - Tertiaries
  48. Hybrid Amp, Tube+MOS FET SE
  49. 3.1 integrated possible?
  50. Plate choke material, why to use amorphous core?
  51. Anything obviously wrong with my mic pre amp ?
  52. K-502 or Yamaha RX-V361 for Klipsch F-1?
  53. Help diagnosing phase-splitter
  54. question about Bruce's GGP preamp
  55. Rickenbacher amp HELP!!!
  56. interpreting max. values listed in datasheet
  57. zenith mlt 15 console record player problem
  58. ORIENTED or Not ORIENTED cores for OPT
  59. Audio Research SP-3-A-1 modified.........
  60. Tube heaters in series.
  61. Output transformer listening impressions?
  62. Tube buffer 6H6P after a DAC
  63. S-5 K16LS in enclosure - Pics
  64. Time to mourn the death of Broskie's Tube CAD blog?
  65. 6N6P preamp
  66. our Preamplifier using 2J27S tubes
  67. dc filament design question
  68. 6AV6A for meter driver
  69. AC wiring heaters, A or B ?
  70. Aikido preamp muting
  71. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  72. hummming YAHA
  73. leave a variac on all the time!
  74. More triodes
  75. Full Wave Rectifier
  76. Blowing B+ fuse
  77. PSRR of CF w/ CCS Sink
  78. MENG Series "EL34B" Integrated Amplifier
  79. Concertina Parafeed, or How to mess with OldEurope's mind...
  80. Phono stage success!
  81. A few pretty pictures and an ugly picture
  82. Rectifier with slow start up?
  83. Calibrating an emission tester
  84. What is this?
  85. 4XKT88 drive
  86. EL84 driven 2a3
  87. need suggestions for "standarizing" tube gain stages
  88. How long until someone tries
  89. Hickok Photo History - hidden web gem!
  90. Common Audio Tubes in standard use
  91. tango input transformer NN-6
  92. Filmosound dual pot
  93. Hi power Moskido with A/B output Bias
  94. how easy to make tube amp?
  95. metal film resistors or carbon?
  96. Quad II tubes replacement
  97. Sirius & FM
  98. Can someone look at a Counterpoint SA7 for me?
  99. The Wintersweet High-Vividity Project
  100. loftin white 801 amp
  101. Pics of unique design of amp chassis?
  102. Heathkit AA-32 modifications / upgrades
  103. Tango XE-20S Specification
  104. Question about Edcor output transformer
  105. SE EL84 output stage?
  106. New ST-70 Driver board from Blackburn Audio
  107. Transformer primary rating question
  108. Heathkit A7(c?) Rebuild
  109. Rewiring a socket to take 6GK6 instead of 6BQ5
  110. 317 CCS Question
  111. Active filter design software
  112. Larry Moore 10Y Squared
  113. Do you hear “pop” when you turn off your amp?
  114. Filmosound - Guitar - Ground
  115. Simple tube phono stage
  116. Tube phono amp repair/redesign help wanted
  117. Repairing a tape echo with tubes (Dynacord Echocord Super 62a)
  118. tube newbie needs guidance
  119. Interesting linestage optimizing ideas
  120. Powered up my Lafayette 224A for the first time!
  121. Hickok Upgrades
  122. Passive BP filter sim results
  123. 100mA heater tubes for phono
  124. Audiotester + M-audio - info + question
  125. Indestructible HV hybrid regulator!
  126. yet another modified 5-20 amplifier
  127. help with OT for 15 watt tube amp
  128. Power supply for 12SL7 phono preamp
  129. few questions
  130. mystery 5881
  131. does lower B+ cause scratchy distortion?
  132. SY please keep us updated about your site
  133. Cleveland Ohio members?
  134. Scope tricks for detecting rectifier/choke switching
  135. To choke or not to choke
  136. Tube rectified LC PS for 6SN7 Aikido - choke DCR question
  137. Convergent Audio Technology (CAT) SL-1 preamplifier
  138. Very low current CCS?
  139. Morgan Jones' E88CC Phono
  140. pse help, unity µ triode as a phase inverter
  141. variable capacitor volume control
  142. What to do with P-P transformer ?
  143. 837 tube for SE Amplifier
  144. calculating transformer current draw question
  145. glass audio 1995 "Single Ended Glory"
  146. Manual for Heathkit AA-121 Power Amp
  147. Low gain triode recommendation plz
  148. Tubelab PP question
  149. Output transformer impedance question
  150. Choke... The side makes difference?
  151. Tubelab...Why "sandy" SE amps?
  152. Fostex Meets Pentode I need some NFB
  153. Oddball Sweep tubes in PP
  154. Noob - where to start?
  155. big doubt: dynakit st35 VS diytube st35clone
  156. Compactron Output Tubes
  157. XPP amp
  158. Tubelab SE ... which 5AR4 ?
  159. Getting only 400 hours on Class A2 PP tube
  160. Pete Millett's 829B amp -> monoblocks
  161. 6JU8A Spec confusion
  162. post on amp design by a newbie
  163. (INDIA) ECC802S/EL84 build, hardware requirements
  164. 6gw8 /ECL86 El Cheapo modifications
  165. Danielak's 300B design
  166. 6080 @ 800µA Question ...
  167. Groundplane layout theory
  168. delay on for 83 mercury vapor
  169. Anyone tried "Weber Copper" SS rectifyers?
  170. Scored a bunch of tubes at HamCon
  171. AB2 Anyone else done similiar
  172. 6v6 pp amplifier
  173. Loud 60 cycle Hum from tube amp.
  174. Building a Preamp
  175. another Big One....:)
  176. JJ factory pictures ...
  177. Good enough CFs
  178. What's a good way to clean tubes w/o taking off the labeling?
  179. 6BX7 or 12B4A for small SE amp?
  180. Schematic collection posted by a kind soul...
  181. Dumb question, but...
  182. Zen Quad 22
  183. I'm baffled -- 6AK6 push-pull amp
  184. pin count question
  185. 1G3 Max Dissapation?
  186. Edcor Transformers
  187. 12EL6 preamp
  188. Request for EICO HF-20 experiences and ideas
  189. So would this work?
  190. A valve pre amp for my disco and electric guitar.
  191. Small-signal (or small power) pentode that can handle 400V (or more)?
  192. Are 6GM8's rare?
  193. How to lower mains voltage using resistors
  194. Music angel XD-SE EL34
  195. Potential project for some inherited transformers
  196. Car Tube Amp?
  197. Marantz 7 Preamp
  198. Euridice pramp but with 45
  199. Tubelab SE Parafeed Monoblocks (5 channel)
  200. Can 6AK6's take high voltages?
  201. Tube equal to one section of a 12AX7?
  202. HK 'Deuce front end on G2 drive output stage?
  203. Direct-coupled cathode/source follower driver in PP?
  204. CCS power supply loading..
  205. Photo Gallery -- Simple SE build
  206. Buying vintage good tubes
  207. current tube manufacturers and or brands
  208. PSU with TL783-question
  209. Hashimoto H-20-7U for 6v6 in triode SE..?
  210. Speakers impedance
  211. mesh plate el34 (supereTNT)
  212. Tagboard amps
  213. 807 single ended guitar amp
  214. Built the DDDAC MKII USB audio card, modified it to feed SRPP tube amp line stage
  215. 6CL6 vs. 12BY7A
  216. Suggestions for a good tube line amp
  217. 12el6
  218. High Squareness Ratio of a Transformer
  219. What causes a tube to crack?
  220. My 66 Fender bassman tube guitar amp is cutting out intermittently and is making a bl
  221. Ming Da MC-7R transformers for Quad 22 clone.
  222. SimpleSE and Switches
  223. Bias and distortion 6EM7
  224. Need ideas - 6L6GA & 6X5GT
  225. tube microphone preamp design ideas
  226. Firestone Air Chief
  227. Zenith Console find, amp suggestions?
  228. 5842 russian equiv 6S45P or 6C45PI ?
  229. bizarre or good topology idea?
  230. 12 EL6 car preamp
  231. Waxy substance leaking from vintage OPT
  232. Output transformer protection fuses
  233. 5670 SRPP DC coupled to 6S4A
  234. L as last filter element?
  235. Strong cigarette smell in a tube amp
  236. Gas coupling?
  237. Differences between nos Tesla E88CC?
  238. Harmonic parrot food?
  239. Modified 6V6 amp, 350 volt @ 250 K HZ output
  240. best current production el34
  241. Help for correct grounding a Dared VP-845
  242. two 6AL5s as a bridge rectifier
  243. JFET Switching on my tube amp
  244. Leak / Dynaco DIY
  245. S-5 tube amp kits
  246. I wanna build a CHEAP mono tube amp, need advice....
  247. 12ax7
  248. Testing for tube shorts
  249. KT66 alternatives in Quad II amps?
  250. FOR TUBE: 350V High Voltage Regulator

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