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  1. Anyone know this 13E1 design...
  2. LTP w/ positive only supply
  3. 6V6 line preamp
  4. The 6P43P russian tube is a EL84 equivalent ??
  5. Ixys IXCP10M45s IC
  6. Help with hybrid mosfet valve amp
  7. Substitute for 6gw8 in Heathkit aa-32
  8. U-Follower: Output from Cathode or Plate?
  9. Getting rid of oscillations in the preamp
  10. has anyone used the 4-125A in SE amp ?
  11. line preamp using 6SN7 instead of 12AU7
  12. 3-pong conversion for Acoustic amplifier
  13. 6v6pp design
  14. CCS Plate Load
  15. All tube voltage doubler
  16. best value/performance ECC83 on market
  17. Help needed for my preamp
  18. 6H6p cascode differential driving 2A3 PP
  19. Best phono / line preamp
  20. Point to Point
  21. gain curve questions
  22. Questions concerning Aikido Line amp
  23. Partial cathode bypass to effect a treble boost.
  24. SE bass
  25. choke orientation
  26. Musical Fidelity X-PRE schematic
  27. Circuitmaker Spice question
  28. Trouble with a paraphase PI
  29. 27 pre PS question..
  30. 6AV5 g2 driver
  31. Calculate PSU output impedance?
  32. Output stage biasing, with the driver stage
  33. tube pedal plate voltages?
  34. grounding and 12AV6 diodes
  35. 6as7 Pse
  36. Looking for datasheets
  37. Ping Albert from Canada
  38. Old Tektronix booklet
  39. fisher 800c phase inverter adjustment 2
  40. Quick Transformer Question
  41. Power supply for Heathkit
  42. low-power output tube quality
  43. Conn Caprice organ
  44. Conservation of tubes
  45. Brimar EM87
  46. Tube sockets without the ceramic carrier.
  47. SET with tube-based CCS???
  48. fisher 800c modifications
  49. Bottlehead meet.
  50. Tie cathode to heater??
  51. anyone seen it tried like this?
  52. What do people think of the SETH 2A3 PP?
  53. Very high plate voltage EL34 amp
  54. How About Bridging SE
  55. Fisher 800c Has Odd Cathode Reading
  56. What part of DIY do you LOVE?
  57. Priboi tweakers ?
  58. 5751 and 12ax7
  59. LM317 + ceramic cap Q
  60. Derive Triode Curves from Pentode Curves?
  61. 7701 distortion device?
  62. Looking for the perfect giftshop
  63. 300b
  64. Choked ripple killer for SE?
  65. Dynaco Kits
  66. Positive bias for tube CF?
  67. need help
  68. Xindak attenuation for use with Leak Stereo 20, help please
  69. Series heaters = small problem?
  70. Recommend an EL84 tube for HIFI
  71. Help - need some info on this valve amp, please
  72. H. Olson's amps
  73. 12AT7 and the Simple EL84
  74. New K-12g only one channel working
  75. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  76. Rauland Borg 6L6 amp Need Info
  77. Hum Noise!
  78. Tube regulator for solidstate devices
  79. 6gu7 a sub for 6cg7/6fq7?
  80. obsession sd-600 300b mono block
  81. how do you know you need matched pair?
  82. Nobu Shishido's 805 SET interstage
  83. KT88SE, turning OPT
  84. New to tubes.
  85. OB with.......well, TL Audio's iTUBE :)
  86. Matched tubes required?
  87. GU-50 output trafo
  88. Are Hammond power transformers good enough ?
  89. Transformers.
  90. Quicky - magic eye between preamp and power stage
  91. HT to rectifier
  92. 6AV5 spice model
  93. Audio Research LS2 from 110V to 220V
  94. 6V6 PP power xfrmr
  95. I think I've damaged my amp
  96. Which brands apart wyetech uses Grounded grid?
  97. Parallel vs. series filament supply - or another filament idea
  98. 6146W Power Amplifier. Please help!
  99. grommes 511a mono tube amp/reciever
  100. First phono needs QC
  101. Meixing 3008ab problems
  102. protecting a VR tube
  103. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  104. help me i need schematic of Music angel PP el34
  105. How long to pre-heat filaments on 6SN7s?
  106. Amplifier Layout - Help & advice needed
  107. Any good places to shop for diy in beijing?
  108. White CF with 6SN7
  109. Power Amp
  110. is there any sound in a 30A5 / HL94 ?
  111. the hybrid one
  112. 4-1000a se subwoofer amp
  113. ear 834p output resistance
  114. Output transformer push pull
  115. Cheap Lunch?
  116. Source for Alps RK18 pot's..?
  117. Triode strapped tetrode
  118. ok, help me out here......
  119. Homebrew Toroid O/P Tranny
  120. strange noises from ECL86 amp
  121. Retouching knicks and scratches on chassis
  122. MingDa MC-7R noise and gain
  123. start-up sequence of Aikido preamp / SS power amp
  124. Driving a 6B4G with a single 5687/7044/E182CC?
  125. phono stage with different replay equalization?
  126. Lprimary variation in pair old opts
  127. 8417 triode connected tube data
  128. 5763 = El84?
  129. 5687 to 6L6 SE ?
  130. TubeCad Feedforward Shunt Regulator
  131. "12EA6" Pentode !
  132. short-circuit rectifier EZ80 !
  133. Good radio tube:6AQ5/6005
  134. Replaced pulled tubes with a resistor?
  135. Choke input PSU, drawbacks?
  136. Heater PS alternative / Redux
  137. Gold or silver dress-up rings for tube amps.
  138. 50C5 conversion
  139. Sa-5.1 blow fuse
  140. Hum problem of preamp
  141. Chassis ground blows fuse
  142. 7193 (2c22) preamp buzz/hum
  143. Se Opt
  144. Does anhone use those switching power supply for the heaters?
  145. Tube Minidoc, featuring New York Noise
  146. Help Choosing A Sowter Trans For My DAC?
  147. fisher 800c clipping at ultra low volume
  148. "audiodigit" tubalizer & tubepre original schematic
  149. F704
  150. tube socket PCB library or dimensions
  151. motorboating
  152. 6AN8 Triode connection + EL 84 PP
  153. Please help amend 6AS7PP circuit
  154. El84 Pp
  155. 6V6 Ultralinear
  156. Dear Moderators
  157. 845 se
  158. Bell 2122-B integrated amp - tube suggestions
  159. Wirewound pot for Rk
  160. KT88/90 F2011 Schematic
  161. United Electric 967
  162. Scott 222c mods...?
  163. Switching supply for 300B filaments
  164. ECF80/6BL8
  165. 24v tube buffer & line stage schematic
  166. Vintage gear hunting
  167. Seperate PSU Transformers? Filament Supplys?
  168. 828 is better
  169. Hum on a choke loaded stage
  170. SE Transformer question
  171. Design question - How to make amp porn visible?
  172. Leak Stereo 20 - Johan's Square Wave Theory
  173. K-12G First Time Build
  174. Vishay vt52-55 resistors in a tube amp
  175. EL84 Push-Pull ccs bias
  176. Eight 807's in Push Pull?
  177. Working with Current O/P DAC Chips
  178. Unison research Preludio schematic
  179. Rewinding Power transformer
  180. Information needed on RCA SPECIAL RED TUBES
  181. Score?
  182. Herron phono
  183. tube preamp + SS power amp.
  184. Puzzler
  185. HI-Fi 6p13p
  186. Resistor values
  187. To chassies SE amp,PSU question
  188. Grounding & board Layout questions
  189. Look for a beefy driver tube.
  190. ECC81
  191. 5687 v.s. 6922 preamp/xover
  192. amorphous iron core good or not
  193. Pre-Amp
  194. submini tube preamp is a success
  195. Roll off frequency.
  196. Materials Technology for Electron Tubes by Walter H. Kohl
  197. Grundig TK 46 manual
  198. How to determine a tube is shorted?
  199. Power supply problem
  200. SS power trans for tube experiments
  201. how to set output current on G Pimm's CCS circuit?
  202. Tube testing questions
  203. Push Pull Output Transformer wiring problem
  204. shunt regulator using VR tubes (with ccs like g pimm) and circuit load
  205. Stepped attenuators vs. Carbon pots
  206. hum/buzz with pot all the way up
  207. VacuTrace ... In Chicago?
  208. Lifesaver question on earthing
  209. Affordable, but good attenuators?
  210. Gu50 Set ?
  211. mounting an EL34 upside-down
  212. Direct coupled PP 2a3 amp - maths needed!!
  213. My 1st scratch build complete......
  214. Very Basic EL84 or EL34 DIY Amp
  215. Curcio Daniel Preamp Mods?
  216. Tube designs: 45 driving 45/2a3/300b?
  217. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  218. Marantz 8 B : Output Transformer
  219. has anyone used a fan on their project?
  220. Audio Research SP12 heater arrangement
  221. tv damper diodes
  222. volume pot quite close to a tube - is this okay?
  223. UTC s42 special series
  224. 6H30P preamp schematics
  225. Digital potentiometer corrupt tube amps
  226. Alternative filament supply for 01A line stage
  227. Lamination Size
  228. Yaqin MC10L and KT88
  229. Help me read tube data sheets
  230. Quick Question (Driving 6L6GC's)
  231. Cause for concern -- scorch mark in tube
  232. why not 10k pot
  233. Dynaco Stereo 70 Output Transformer
  234. 6CJ3 rectifier or 6D22S rectifier
  235. Back-to-Back trannies
  236. Hamfest in Toronto area next weekend
  237. st70 bass response
  238. Triode "Champ" transformer v Edcor
  239. Low vs High aka Series vs Parallel Filaments
  240. Bogen monster MO200A schematic
  241. The Great Tempe Audio Shootout
  242. opinions on this p-p kt88
  243. Any XLR Tube Buffer Plans?
  244. Mystery transformers
  245. I need help with my next project
  246. A thought on Cathode feedback
  247. EL34 SE, direct coupled
  248. Ccs
  249. Hybrid amp: ECH83 + TDA2030A
  250. Leaving tube preamp always powered on.

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