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  1. H. P. Friedrichs
  2. The Rebuilding of Theta KT-88 Tube amp.
  3. Please check my PS pcb board layout for problems????
  4. glass capacitors
  5. Help w/fixing counterpoint Sa7 preamp
  6. IXYS 10M45 CCS IC question
  7. Wing-C 300B tubes and opinions
  8. PX25 DRD Power amp.
  9. rectifier tube recommendation please
  10. 6C33C to more standard triode conversion - any ideas?
  11. PP EL84 Build Questions (Bevois Valley)
  12. Tube line stage output impedance
  13. volume between gain stages
  14. Dyna ST70 PWR Tranny 6.3V Crnt Spec?
  15. Next Project - Darling Amplifier or 45
  16. tube magazines
  17. PSU choke help please
  18. PCB Trace properties for PP tube amplifier ( 12AQ5, 6v6 etc)
  19. TubelabSE phase
  20. EML 300B XLS and Mesh comparison
  21. UL - triode switch
  22. Spud anyone?
  23. Nooo! Almost have this amp built!
  24. Need help - Old cap can ID
  25. 16SL7+6SN7 Aikido
  26. 1600Hz Transformer?
  27. Anyone have a Bogen MX 60 Schematic they can post
  28. mc100b burned up
  29. DC heating, parallel diodes
  30. Identify Amperex Tube?
  31. Which speaker tap when going from UL to triode
  32. Tube wont bias...
  33. DIY stepped attenuator
  34. TV-7/DU KT88 Settings?
  35. Filmosound - Tone Knob - Tertiaries
  36. Hybrid Amp, Tube+MOS FET SE
  37. 3.1 integrated possible?
  38. Plate choke material, why to use amorphous core?
  39. Anything obviously wrong with my mic pre amp ?
  40. K-502 or Yamaha RX-V361 for Klipsch F-1?
  41. Help diagnosing phase-splitter
  42. question about Bruce's GGP preamp
  43. Rickenbacher amp HELP!!!
  44. interpreting max. values listed in datasheet
  45. zenith mlt 15 console record player problem
  46. ORIENTED or Not ORIENTED cores for OPT
  47. Audio Research SP-3-A-1 modified.........
  48. Tube heaters in series.
  49. Output transformer listening impressions?
  50. Tube buffer 6H6P after a DAC
  51. S-5 K16LS in enclosure - Pics
  52. Time to mourn the death of Broskie's Tube CAD blog?
  53. 6N6P preamp
  54. our Preamplifier using 2J27S tubes
  55. dc filament design question
  56. 6AV6A for meter driver
  57. AC wiring heaters, A or B ?
  58. Aikido preamp muting
  59. Help! New Yaoin MC-100B with intermittent crackling noise from speakers
  60. hummming YAHA
  61. leave a variac on all the time!
  62. More triodes
  63. Full Wave Rectifier
  64. Blowing B+ fuse
  65. PSRR of CF w/ CCS Sink
  66. MENG Series "EL34B" Integrated Amplifier
  67. Concertina Parafeed, or How to mess with OldEurope's mind...
  68. Phono stage success!
  69. A few pretty pictures and an ugly picture
  70. Rectifier with slow start up?
  71. Calibrating an emission tester
  72. What is this?
  73. 4XKT88 drive
  74. EL84 driven 2a3
  75. need suggestions for "standarizing" tube gain stages
  76. How long until someone tries
  77. Hickok Photo History - hidden web gem!
  78. Common Audio Tubes in standard use
  79. tango input transformer NN-6
  80. Filmosound dual pot
  81. Hi power Moskido with A/B output Bias
  82. how easy to make tube amp?
  83. metal film resistors or carbon?
  84. Quad II tubes replacement
  85. Sirius & FM
  86. Can someone look at a Counterpoint SA7 for me?
  87. The Wintersweet High-Vividity Project
  88. loftin white 801 amp
  89. Pics of unique design of amp chassis?
  90. Heathkit AA-32 modifications / upgrades
  91. Tango XE-20S Specification
  92. Question about Edcor output transformer
  93. SE EL84 output stage?
  94. New ST-70 Driver board from Blackburn Audio
  95. Transformer primary rating question
  96. Heathkit A7(c?) Rebuild
  97. Rewiring a socket to take 6GK6 instead of 6BQ5
  98. 317 CCS Question
  99. Active filter design software
  100. Larry Moore 10Y Squared
  101. Do you hear “pop” when you turn off your amp?
  102. Filmosound - Guitar - Ground
  103. Simple tube phono stage
  104. Tube phono amp repair/redesign help wanted
  105. Repairing a tape echo with tubes (Dynacord Echocord Super 62a)
  106. tube newbie needs guidance
  107. Interesting linestage optimizing ideas
  108. Powered up my Lafayette 224A for the first time!
  109. Hickok Upgrades
  110. Passive BP filter sim results
  111. 100mA heater tubes for phono
  112. Audiotester + M-audio - info + question
  113. Indestructible HV hybrid regulator!
  114. yet another modified 5-20 amplifier
  115. help with OT for 15 watt tube amp
  116. Power supply for 12SL7 phono preamp
  117. few questions
  118. mystery 5881
  119. does lower B+ cause scratchy distortion?
  120. SY please keep us updated about your site
  121. Cleveland Ohio members?
  122. Scope tricks for detecting rectifier/choke switching
  123. To choke or not to choke
  124. Tube rectified LC PS for 6SN7 Aikido - choke DCR question
  125. Convergent Audio Technology (CAT) SL-1 preamplifier
  126. Very low current CCS?
  127. Morgan Jones' E88CC Phono
  128. pse help, unity µ triode as a phase inverter
  129. variable capacitor volume control
  130. What to do with P-P transformer ?
  131. 837 tube for SE Amplifier
  132. calculating transformer current draw question
  133. glass audio 1995 "Single Ended Glory"
  134. Manual for Heathkit AA-121 Power Amp
  135. Low gain triode recommendation plz
  136. Tubelab PP question
  137. Output transformer impedance question
  138. Choke... The side makes difference?
  139. Tubelab...Why "sandy" SE amps?
  140. Fostex Meets Pentode I need some NFB
  141. Oddball Sweep tubes in PP
  142. Noob - where to start?
  143. big doubt: dynakit st35 VS diytube st35clone
  144. Compactron Output Tubes
  145. XPP amp
  146. Tubelab SE ... which 5AR4 ?
  147. Getting only 400 hours on Class A2 PP tube
  148. Pete Millett's 829B amp -> monoblocks
  149. 6JU8A Spec confusion
  150. post on amp design by a newbie
  151. (INDIA) ECC802S/EL84 build, hardware requirements
  152. 6gw8 /ECL86 El Cheapo modifications
  153. Danielak's 300B design
  154. 6080 @ 800µA Question ...
  155. Groundplane layout theory
  156. delay on for 83 mercury vapor
  157. Anyone tried "Weber Copper" SS rectifyers?
  158. Scored a bunch of tubes at HamCon
  159. AB2 Anyone else done similiar
  160. 6v6 pp amplifier
  161. Loud 60 cycle Hum from tube amp.
  162. Building a Preamp
  163. another Big One....:)
  164. JJ factory pictures ...
  165. Good enough CFs
  166. What's a good way to clean tubes w/o taking off the labeling?
  167. 6BX7 or 12B4A for small SE amp?
  168. Schematic collection posted by a kind soul...
  169. Dumb question, but...
  170. Zen Quad 22
  171. I'm baffled -- 6AK6 push-pull amp
  172. pin count question
  173. 1G3 Max Dissapation?
  174. Edcor Transformers
  175. 12EL6 preamp
  176. Request for EICO HF-20 experiences and ideas
  177. So would this work?
  178. A valve pre amp for my disco and electric guitar.
  179. Small-signal (or small power) pentode that can handle 400V (or more)?
  180. Are 6GM8's rare?
  181. How to lower mains voltage using resistors
  182. Music angel XD-SE EL34
  183. Potential project for some inherited transformers
  184. Car Tube Amp?
  185. Marantz 7 Preamp
  186. Euridice pramp but with 45
  187. Tubelab SE Parafeed Monoblocks (5 channel)
  188. Can 6AK6's take high voltages?
  189. Tube equal to one section of a 12AX7?
  190. HK 'Deuce front end on G2 drive output stage?
  191. Direct-coupled cathode/source follower driver in PP?
  192. CCS power supply loading..
  193. Photo Gallery -- Simple SE build
  194. Buying vintage good tubes
  195. current tube manufacturers and or brands
  196. PSU with TL783-question
  197. Hashimoto H-20-7U for 6v6 in triode SE..?
  198. Speakers impedance
  199. mesh plate el34 (supereTNT)
  200. Tagboard amps
  201. 807 single ended guitar amp
  202. Built the DDDAC MKII USB audio card, modified it to feed SRPP tube amp line stage
  203. 6CL6 vs. 12BY7A
  204. Suggestions for a good tube line amp
  205. 12el6
  206. High Squareness Ratio of a Transformer
  207. What causes a tube to crack?
  208. My 66 Fender bassman tube guitar amp is cutting out intermittently and is making a bl
  209. Ming Da MC-7R transformers for Quad 22 clone.
  210. SimpleSE and Switches
  211. Bias and distortion 6EM7
  212. Need ideas - 6L6GA & 6X5GT
  213. tube microphone preamp design ideas
  214. Firestone Air Chief
  215. Zenith Console find, amp suggestions?
  216. 5842 russian equiv 6S45P or 6C45PI ?
  217. bizarre or good topology idea?
  218. 12 EL6 car preamp
  219. Waxy substance leaking from vintage OPT
  220. Output transformer protection fuses
  221. 5670 SRPP DC coupled to 6S4A
  222. L as last filter element?
  223. Strong cigarette smell in a tube amp
  224. Gas coupling?
  225. Differences between nos Tesla E88CC?
  226. Harmonic parrot food?
  227. Modified 6V6 amp, 350 volt @ 250 K HZ output
  228. best current production el34
  229. Help for correct grounding a Dared VP-845
  230. two 6AL5s as a bridge rectifier
  231. JFET Switching on my tube amp
  232. Leak / Dynaco DIY
  233. S-5 tube amp kits
  234. I wanna build a CHEAP mono tube amp, need advice....
  235. 12ax7
  236. Testing for tube shorts
  237. KT66 alternatives in Quad II amps?
  238. FOR TUBE: 350V High Voltage Regulator
  239. what guideline to match pre and amp?
  240. New to list and 300B amp kits
  241. Krank 100w head w/ only 14v output
  242. Silvertone 1448 Output Transformer?
  243. Primary impedance output transformer
  244. isolation transformer
  245. Cloning transformers
  246. EAR509
  247. EL84 for Ipod and guitar
  248. Tubelab web site down, no more SimpleSE
  249. Schematics of potential interest
  250. super capacitor for dc heater

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