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  1. Big valve preamp
  2. Question about biasing heater above cathode in a direct coupled circuit.
  3. center tapped choke inverter
  4. Guitar tube pre DIY suggestions..?
  5. Which One Of These Tube Amps Should I Buy?
  6. Tube Info
  7. Circuit/Equipment Designer
  8. help needed with noise in phono preamp
  9. Pentode driver and IT?
  10. Plate Caps for 832A
  11. 300b advice
  12. Designs on your noob, err, tube
  13. 7788 Triode Curves
  14. EL81/6CJ6 operating point
  15. Separate cathode resistors in push pull output
  16. C3m linestage
  17. Anyone know this 13E1 design...
  18. LTP w/ positive only supply
  19. 6V6 line preamp
  20. The 6P43P russian tube is a EL84 equivalent ??
  21. Ixys IXCP10M45s IC
  22. Help with hybrid mosfet valve amp
  23. Substitute for 6gw8 in Heathkit aa-32
  24. U-Follower: Output from Cathode or Plate?
  25. Getting rid of oscillations in the preamp
  26. has anyone used the 4-125A in SE amp ?
  27. line preamp using 6SN7 instead of 12AU7
  28. 3-pong conversion for Acoustic amplifier
  29. 6v6pp design
  30. CCS Plate Load
  31. All tube voltage doubler
  32. best value/performance ECC83 on market
  33. Help needed for my preamp
  34. 6H6p cascode differential driving 2A3 PP
  35. Best phono / line preamp
  36. Point to Point
  37. gain curve questions
  38. Questions concerning Aikido Line amp
  39. Partial cathode bypass to effect a treble boost.
  40. SE bass
  41. choke orientation
  42. Musical Fidelity X-PRE schematic
  43. Circuitmaker Spice question
  44. Trouble with a paraphase PI
  45. 27 pre PS question..
  46. 6AV5 g2 driver
  47. Calculate PSU output impedance?
  48. Output stage biasing, with the driver stage
  49. tube pedal plate voltages?
  50. grounding and 12AV6 diodes
  51. 6as7 Pse
  52. Looking for datasheets
  53. Ping Albert from Canada
  54. Old Tektronix booklet
  55. fisher 800c phase inverter adjustment 2
  56. Quick Transformer Question
  57. Power supply for Heathkit
  58. low-power output tube quality
  59. Conn Caprice organ
  60. Conservation of tubes
  61. Brimar EM87
  62. Tube sockets without the ceramic carrier.
  63. SET with tube-based CCS???
  64. fisher 800c modifications
  65. Bottlehead meet.
  66. Tie cathode to heater??
  67. anyone seen it tried like this?
  68. What do people think of the SETH 2A3 PP?
  69. Very high plate voltage EL34 amp
  70. How About Bridging SE
  71. Fisher 800c Has Odd Cathode Reading
  72. What part of DIY do you LOVE?
  73. Priboi tweakers ?
  74. 5751 and 12ax7
  75. LM317 + ceramic cap Q
  76. Derive Triode Curves from Pentode Curves?
  77. 7701 distortion device?
  78. Looking for the perfect giftshop
  79. 300b
  80. Choked ripple killer for SE?
  81. Dynaco Kits
  82. Positive bias for tube CF?
  83. need help
  84. Xindak attenuation for use with Leak Stereo 20, help please
  85. Series heaters = small problem?
  86. Recommend an EL84 tube for HIFI
  87. Help - need some info on this valve amp, please
  88. H. Olson's amps
  89. 12AT7 and the Simple EL84
  90. New K-12g only one channel working
  91. Kofi Annan in: "Kofi Makes a 300b DRD... and You Get to Help!"
  92. Rauland Borg 6L6 amp Need Info
  93. Hum Noise!
  94. Tube regulator for solidstate devices
  95. 6gu7 a sub for 6cg7/6fq7?
  96. obsession sd-600 300b mono block
  97. how do you know you need matched pair?
  98. Nobu Shishido's 805 SET interstage
  99. KT88SE, turning OPT
  100. New to tubes.
  101. OB with.......well, TL Audio's iTUBE :)
  102. Matched tubes required?
  103. GU-50 output trafo
  104. Are Hammond power transformers good enough ?
  105. Transformers.
  106. Quicky - magic eye between preamp and power stage
  107. HT to rectifier
  108. 6AV5 spice model
  109. Audio Research LS2 from 110V to 220V
  110. 6V6 PP power xfrmr
  111. I think I've damaged my amp
  112. Which brands apart wyetech uses Grounded grid?
  113. Parallel vs. series filament supply - or another filament idea
  114. 6146W Power Amplifier. Please help!
  115. grommes 511a mono tube amp/reciever
  116. First phono needs QC
  117. Meixing 3008ab problems
  118. protecting a VR tube
  119. what's the purpose of pins 3 and 7 in an 8pin VR tube?
  120. help me i need schematic of Music angel PP el34
  121. How long to pre-heat filaments on 6SN7s?
  122. Amplifier Layout - Help & advice needed
  123. Any good places to shop for diy in beijing?
  124. White CF with 6SN7
  125. Cheapo Guitar Amp
  126. Power Amp
  127. is there any sound in a 30A5 / HL94 ?
  128. the hybrid one
  129. 4-1000a se subwoofer amp
  130. ear 834p output resistance
  131. Output transformer push pull
  132. Cheap Lunch?
  133. Source for Alps RK18 pot's..?
  134. Triode strapped tetrode
  135. ok, help me out here......
  136. Homebrew Toroid O/P Tranny
  137. GIBSON GA-79RVT Stereo Cab plans or dims
  138. strange noises from ECL86 amp
  139. Retouching knicks and scratches on chassis
  140. MingDa MC-7R noise and gain
  141. start-up sequence of Aikido preamp / SS power amp
  142. Driving a 6B4G with a single 5687/7044/E182CC?
  143. phono stage with different replay equalization?
  144. Lprimary variation in pair old opts
  145. 8417 triode connected tube data
  146. 5763 = El84?
  147. 5687 to 6L6 SE ?
  148. TubeCad Feedforward Shunt Regulator
  149. "12EA6" Pentode !
  150. Marshall EL34-100/100
  151. short-circuit rectifier EZ80 !
  152. Good radio tube:6AQ5/6005
  153. Replaced pulled tubes with a resistor?
  154. Choke input PSU, drawbacks?
  155. Heater PS alternative / Redux
  156. Gold or silver dress-up rings for tube amps.
  157. 50C5 conversion
  158. Sa-5.1 blow fuse
  159. Hum problem of preamp
  160. Chassis ground blows fuse
  161. 7193 (2c22) preamp buzz/hum
  162. Se Opt
  163. Does anhone use those switching power supply for the heaters?
  164. Tube Minidoc, featuring New York Noise
  165. Help Choosing A Sowter Trans For My DAC?
  166. fisher 800c clipping at ultra low volume
  167. "audiodigit" tubalizer & tubepre original schematic
  168. Dht Guitar Amps
  169. rating of series caps
  170. F704
  171. tube socket PCB library or dimensions
  172. motorboating
  173. 6AN8 Triode connection + EL 84 PP
  174. Please help amend 6AS7PP circuit
  175. El84 Pp
  176. 6V6 Ultralinear
  177. Dear Moderators
  178. 845 se
  179. Bell 2122-B integrated amp - tube suggestions
  180. Wirewound pot for Rk
  181. KT88/90 F2011 Schematic
  182. United Electric 967
  183. Scott 222c mods...?
  184. Switching supply for 300B filaments
  185. ECF80/6BL8
  186. 24v tube buffer & line stage schematic
  187. Vintage gear hunting
  188. Seperate PSU Transformers? Filament Supplys?
  189. 828 is better
  190. Hum on a choke loaded stage
  191. SE Transformer question
  192. Design question - How to make amp porn visible?
  193. Leak Stereo 20 - Johan's Square Wave Theory
  194. K-12G First Time Build
  195. Vishay vt52-55 resistors in a tube amp
  196. EL84 Push-Pull ccs bias
  197. Eight 807's in Push Pull?
  198. Working with Current O/P DAC Chips
  199. Unison research Preludio schematic
  200. Rewinding Power transformer
  201. Information needed on RCA SPECIAL RED TUBES
  202. Score?
  203. Herron phono
  204. tube preamp + SS power amp.
  205. Puzzler
  206. HI-Fi 6p13p
  207. Resistor values
  208. To chassies SE amp,PSU question
  209. Grounding & board Layout questions
  210. Look for a beefy driver tube.
  211. ECC81
  212. 5687 v.s. 6922 preamp/xover
  213. amorphous iron core good or not
  214. Pre-Amp
  215. submini tube preamp is a success
  216. Roll off frequency.
  217. Materials Technology for Electron Tubes by Walter H. Kohl
  218. Grundig TK 46 manual
  219. I'm anti-expensive audio parts but man, a good capacitor can make a difference
  220. How to determine a tube is shorted?
  221. Power supply problem
  222. SS power trans for tube experiments
  223. how to set output current on G Pimm's CCS circuit?
  224. Tube testing questions
  225. Push Pull Output Transformer wiring problem
  226. shunt regulator using VR tubes (with ccs like g pimm) and circuit load
  227. Stepped attenuators vs. Carbon pots
  228. hum/buzz with pot all the way up
  229. Cap and resistor types in guitar tube amp
  230. VacuTrace ... In Chicago?
  231. Lifesaver question on earthing
  232. Affordable, but good attenuators?
  233. Gu50 Set ?
  234. mounting an EL34 upside-down
  235. Direct coupled PP 2a3 amp - maths needed!!
  236. My 1st scratch build complete......
  237. Very Basic EL84 or EL34 DIY Amp
  238. Curcio Daniel Preamp Mods?
  239. Tube designs: 45 driving 45/2a3/300b?
  240. Adding secondary of output transformer into cathodes of output stage ? Eico ST-70
  241. Marantz 8 B : Output Transformer
  242. has anyone used a fan on their project?
  243. Audio Research SP12 heater arrangement
  244. tv damper diodes
  245. volume pot quite close to a tube - is this okay?
  246. UTC s42 special series
  247. 6H30P preamp schematics
  248. Digital potentiometer corrupt tube amps
  249. Alternative filament supply for 01A line stage
  250. Lamination Size

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