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  1. Conservation of tubes
  2. Brimar EM87
  3. Tube sockets without the ceramic carrier.
  4. SET with tube-based CCS???
  5. fisher 800c modifications
  6. Bottlehead meet.
  7. Tie cathode to heater??
  8. anyone seen it tried like this?
  9. What do people think of the SETH 2A3 PP?
  10. Very high plate voltage EL34 amp
  11. How About Bridging SE
  12. Fisher 800c Has Odd Cathode Reading
  13. What part of DIY do you LOVE?
  14. Priboi tweakers ?
  15. 5751 and 12ax7
  16. LM317 + ceramic cap Q
  17. Derive Triode Curves from Pentode Curves?
  18. 7701 distortion device?
  19. Looking for the perfect giftshop
  20. 300b
  21. Choked ripple killer for SE?
  22. Dynaco Kits
  23. Positive bias for tube CF?
  24. need help
  25. Xindak attenuation for use with Leak Stereo 20, help please
  26. Series heaters = small problem?
  27. Recommend an EL84 tube for HIFI
  28. Help - need some info on this valve amp, please
  29. H. Olson's amps
  30. 12AT7 and the Simple EL84
  31. New K-12g only one channel working
  32. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  33. Rauland Borg 6L6 amp Need Info
  34. Hum Noise!
  35. Tube regulator for solidstate devices
  36. 6gu7 a sub for 6cg7/6fq7?
  37. obsession sd-600 300b mono block
  38. how do you know you need matched pair?
  39. Nobu Shishido's 805 SET interstage
  40. KT88SE, turning OPT
  41. New to tubes.
  42. OB with.......well, TL Audio's iTUBE :)
  43. Matched tubes required?
  44. GU-50 output trafo
  45. Are Hammond power transformers good enough ?
  46. Transformers.
  47. Quicky - magic eye between preamp and power stage
  48. HT to rectifier
  49. 6AV5 spice model
  50. Audio Research LS2 from 110V to 220V
  51. 6V6 PP power xfrmr
  52. I think I've damaged my amp
  53. Which brands apart wyetech uses Grounded grid?
  54. Parallel vs. series filament supply - or another filament idea
  55. 6146W Power Amplifier. Please help!
  56. grommes 511a mono tube amp/reciever
  57. First phono needs QC
  58. Meixing 3008ab problems
  59. protecting a VR tube
  60. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  61. help me i need schematic of Music angel PP el34
  62. How long to pre-heat filaments on 6SN7s?
  63. Amplifier Layout - Help & advice needed
  64. Any good places to shop for diy in beijing?
  65. White CF with 6SN7
  66. Cheapo Guitar Amp
  67. Power Amp
  68. is there any sound in a 30A5 / HL94 ?
  69. the hybrid one
  70. 4-1000a se subwoofer amp
  71. ear 834p output resistance
  72. Output transformer push pull
  73. Cheap Lunch?
  74. Source for Alps RK18 pot's..?
  75. Triode strapped tetrode
  76. ok, help me out here......
  77. Homebrew Toroid O/P Tranny
  78. GIBSON GA-79RVT Stereo Cab plans or dims
  79. strange noises from ECL86 amp
  80. Retouching knicks and scratches on chassis
  81. MingDa MC-7R noise and gain
  82. start-up sequence of Aikido preamp / SS power amp
  83. Driving a 6B4G with a single 5687/7044/E182CC?
  84. phono stage with different replay equalization?
  85. Lprimary variation in pair old opts
  86. 8417 triode connected tube data
  87. 5763 = El84?
  88. 5687 to 6L6 SE ?
  89. TubeCad Feedforward Shunt Regulator
  90. "12EA6" Pentode !
  91. Marshall EL34-100/100
  92. short-circuit rectifier EZ80 !
  93. Good radio tube:6AQ5/6005
  94. Replaced pulled tubes with a resistor?
  95. Choke input PSU, drawbacks?
  96. Heater PS alternative / Redux
  97. Gold or silver dress-up rings for tube amps.
  98. 50C5 conversion
  99. Sa-5.1 blow fuse
  100. Hum problem of preamp
  101. Chassis ground blows fuse
  102. 7193 (2c22) preamp buzz/hum
  103. Se Opt
  104. Does anhone use those switching power supply for the heaters?
  105. Tube Minidoc, featuring New York Noise
  106. Help Choosing A Sowter Trans For My DAC?
  107. fisher 800c clipping at ultra low volume
  108. "audiodigit" tubalizer & tubepre original schematic
  109. Dht Guitar Amps
  110. rating of series caps
  111. F704
  112. tube socket PCB library or dimensions
  113. motorboating
  114. 6AN8 Triode connection + EL 84 PP
  115. Please help amend 6AS7PP circuit
  116. El84 Pp
  117. 6V6 Ultralinear
  118. Dear Moderators
  119. 845 se
  120. Bell 2122-B integrated amp - tube suggestions
  121. Wirewound pot for Rk
  122. KT88/90 F2011 Schematic
  123. United Electric 967
  124. Scott 222c mods...?
  125. Switching supply for 300B filaments
  126. ECF80/6BL8
  127. 24v tube buffer & line stage schematic
  128. Vintage gear hunting
  129. Seperate PSU Transformers? Filament Supplys?
  130. 828 is better
  131. Hum on a choke loaded stage
  132. SE Transformer question
  133. Design question - How to make amp porn visible?
  134. Leak Stereo 20 - Johan's Square Wave Theory
  135. K-12G First Time Build
  136. Vishay vt52-55 resistors in a tube amp
  137. EL84 Push-Pull ccs bias
  138. Eight 807's in Push Pull?
  139. Working with Current O/P DAC Chips
  140. Unison research Preludio schematic
  141. Rewinding Power transformer
  142. Information needed on RCA SPECIAL RED TUBES
  143. Score?
  144. Herron phono
  145. tube preamp + SS power amp.
  146. Puzzler
  147. HI-Fi 6p13p
  148. Resistor values
  149. To chassies SE amp,PSU question
  150. Grounding & board Layout questions
  151. Look for a beefy driver tube.
  152. ECC81
  153. 5687 v.s. 6922 preamp/xover
  154. amorphous iron core good or not
  155. Pre-Amp
  156. submini tube preamp is a success
  157. Roll off frequency.
  158. Materials Technology for Electron Tubes by Walter H. Kohl
  159. Grundig TK 46 manual
  160. I'm anti-expensive audio parts but man, a good capacitor can make a difference
  161. How to determine a tube is shorted?
  162. Power supply problem
  163. SS power trans for tube experiments
  164. how to set output current on G Pimm's CCS circuit?
  165. Tube testing questions
  166. Push Pull Output Transformer wiring problem
  167. shunt regulator using VR tubes (with ccs like g pimm) and circuit load
  168. Stepped attenuators vs. Carbon pots
  169. hum/buzz with pot all the way up
  170. Cap and resistor types in guitar tube amp
  171. VacuTrace ... In Chicago?
  172. Lifesaver question on earthing
  173. Affordable, but good attenuators?
  174. Gu50 Set ?
  175. mounting an EL34 upside-down
  176. Direct coupled PP 2a3 amp - maths needed!!
  177. My 1st scratch build complete......
  178. Very Basic EL84 or EL34 DIY Amp
  179. Curcio Daniel Preamp Mods?
  180. Tube designs: 45 driving 45/2a3/300b?
  181. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  182. Marantz 8 B : Output Transformer
  183. has anyone used a fan on their project?
  184. Audio Research SP12 heater arrangement
  185. tv damper diodes
  186. volume pot quite close to a tube - is this okay?
  187. UTC s42 special series
  188. 6H30P preamp schematics
  189. Digital potentiometer corrupt tube amps
  190. Alternative filament supply for 01A line stage
  191. Lamination Size
  192. Yaqin MC10L and KT88
  193. Help me read tube data sheets
  194. Quick Question (Driving 6L6GC's)
  195. Cause for concern -- scorch mark in tube
  196. why not 10k pot
  197. Dynaco Stereo 70 Output Transformer
  198. 6CJ3 rectifier or 6D22S rectifier
  199. Back-to-Back trannies
  200. Spring Reverb transformer
  201. Hamfest in Toronto area next weekend
  202. st70 bass response
  203. Triode "Champ" transformer v Edcor
  204. Low vs High aka Series vs Parallel Filaments
  205. Bogen monster MO200A schematic
  206. The Great Tempe Audio Shootout
  207. opinions on this p-p kt88
  208. Any XLR Tube Buffer Plans?
  209. Mystery transformers
  210. I need help with my next project
  211. A thought on Cathode feedback
  212. EL34 SE, direct coupled
  213. Ccs
  214. Hybrid amp: ECH83 + TDA2030A
  215. Leaving tube preamp always powered on.
  216. Variable 6922 heater to cathode voltage limit...?
  217. Is this risky?
  218. What to do with some WE tubes and others
  219. 6B4G SRPP
  220. pentode in triode mode SE vs a DHT SE like 2a3/300b
  221. dynakit decware bottlehead ... which to pick
  222. 6JC6 triode strapped?
  223. Searching for Raw Turrets
  224. Help.. EZ81 power supply diagram
  225. Ear 8l6
  226. Bogen H-30 guitar mod
  227. Voltage measurements from a blown 5AR4 vs. good 5Y3
  228. Sanity check on a 2A3 ultrapath with Pentode driver
  229. Star ground with dissimilar metals: concern?
  230. 5AR4 marked as 5V4GA?
  231. Calculating cathode bypass cap.
  232. Please need help! TUBE BIAS PROBE
  233. Aikido Phono Stage
  234. Using an El84 as a driver
  235. Transfromer value of this 300B circuit
  236. Chassis Layout & PS questions
  237. help needed for 1st DIY tube amp - Sakuma 845 SE
  238. Ideas for 4v filament triodes/pentodes
  239. Comments on Power Amp Viability
  240. Balanced active crossover advice
  241. The Tube Center
  242. Help1 with a 3 channel 2a3 amplifier
  243. volume control hum/noise
  244. PS choke magnetic induction
  245. Circlotron power supply question
  246. Autoformer as choke?
  247. E182CC
  248. Fender Hotrod Deville 212
  249. Grundig Fine Arts OTL Amplifier
  250. Damper diodes, 6ax4 and or 6w4?

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