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  1. Output Stage in MJ Question
  2. Input voltage on an integrated tube amp
  3. 6sf5 = 1/2 12ax7?
  4. Observations of amplifier sound
  5. Sovtek KT88
  6. 24 or 24a as driver in 2 stage..?
  7. Too high transformator voltages...
  8. This power supply ok?
  9. 300B valves
  10. Modulation transformer for a driver transformer?
  11. Is 6V DC too low for heater filament?
  12. mundorff 0.47 silver in oil
  13. need manual for heathkit sp2
  14. Interresting Quiz. Which tube is this?
  15. el84 burn in time ?
  16. Tube Amp Compensation Q
  17. Quad II Advice
  18. Bias problem- 1 Socket shows extremely low bias!
  19. ECC88 vs E88CC
  20. Finally, back to my Simple SE project
  21. can trafo laminations rest on chassis?
  22. Ping Poindexter - 6SN7 Moebius Linestage Question
  23. More information wanted on this Phase Splitter Circuit
  24. Converting tube tester to Mutual Conductance
  25. 6UA4-GTA Question
  26. oscilloscope turned guitar amp?
  27. LED cathode bias - how to pick LED?
  28. preamp question
  29. Hickok tube tester calibration help needed
  30. Watch this !
  31. any Welborne Labs Ultrapath owners ?
  32. McIntosh transformer turns ratio
  33. 12E1 & S11E12 as a KT88 substitution
  34. Dynaco ST-70 Triode Conversion Techniques
  35. Larry Moore power supply
  36. SE to Balanced tube preamp idea
  37. Help on Cascode DN2540 CCS
  38. Kt88 Pp
  39. What was the diy world like before the internet?
  40. Updated my website
  41. Marshall AVT 50 preamp gain/distortion increase
  42. Interstage question in 6ac5G design
  43. Using a powered sub with my tube amp
  44. 807pp suggestions and guidance please
  45. 2 stage IT coupled SE suggestions.?
  46. WE429A similar to 6V6?
  47. 6FQ7 in RH84
  48. Deluxe Reverb Re-Issue High Frequency Noise.
  49. What splitter for this design ?
  50. preamp kit?
  51. PP power supply design questions
  52. Hammond 1650P for KT88 PP - any experience?
  53. Gibson tube amp mod for JAZZ
  54. Cathode Bypass caps - how to choose?
  55. Marantz 9 output power switch
  56. Single ended KT88 question
  57. Anyone Have a Hickok 800A
  58. Please post your experience with 6C45 and 6H30
  59. Series-Shunt Regulator I need
  60. Hammond Gripe
  61. capacitors in series- what value balancing resistors?
  62. Substituting Pentode for Triode
  63. Pentode Driver Calculations
  64. DHT and speed issues
  65. Aikido vibration issue
  66. Modified Salas Mosfet Shunt Reg
  67. What if O.H. Schade had MOSFETs?
  68. Please Look at my circuit
  69. EL34 tube amp that needs work on
  70. question on differential stage
  71. Need help with my ST70, decrease in one channel
  72. Diff drive
  73. Stereo Aikido GND help
  74. Hashimoto HL-20K-6 Line Output Transformers
  75. What is the RIGHT way to calculate the Value of the cathode resistor?
  76. Kt88 Se
  77. ping Tom Schlangen
  78. Found An Old Transformer, Now What???
  79. Brook 22A restoration, HELP!!
  80. Optimal operating point for 7N7/6SN7?
  81. Loudness Control Calc - Help Please
  82. Kofi Annan in: "Cascodin' with Steve Bench's RIAA!"
  83. New 300B PP amp completed, phase shift questions
  84. One more PSU2 question
  85. 5U4 Darling power TX advice needed
  86. how to optimize this pentode PP (PP1 clone with S11E12)
  87. Can I change the input to a 6SL7?
  88. Outputtransformer to IGA 6550C ULPP
  89. Question on use PSUD2 software
  90. Please add to my confusion re stepup transformers
  91. filament power supply question
  92. Major Hum Problem
  93. FARMER LAMP amp
  94. Valve amp "master class"
  95. Toroid power transformers - are they a good idea?
  96. EL84 SE amplifier
  97. Gain Problems
  98. My SE KT-88 Build thread
  99. Rolling da(rling's) 6j4wa
  100. Phono pre amp
  101. Michealson Audio Da Vinci Preamp
  102. Acrosound PP 6550: Any Advice?
  103. PS idea: isolating transformer from load
  104. K-16LS Help Please
  105. 6N6P-I life-time
  106. Filament Xformer woes...
  107. The Use of 1:1 Input Transformers in Linestages
  108. 12hg7 vs 12hn7a
  109. Anyone familiar with VAC PA 90C1?
  110. Help restore an RCP 413 tube tester
  111. voltage reg make heat sink live. Bad idea?
  112. Audio Innovations series 800 reactivation + some mods
  113. Using 2 rectifiers off 1 power supply
  114. Tube power supply
  115. Improving low bass of a Scott 299c
  116. 1939 Radioshack Catalog online...Anyone have a time machine?
  117. VCCS filament supply for 813
  118. digital volume control
  119. Philips AD3800AM and AD9710AM clones
  120. MTP6N60E replacement
  121. Upgrading output transformers
  122. Cascode RIAA
  123. need a manual for selectron model 40 tube tester??
  124. Volume swinging problem
  125. How to use the almost Group buy Diyaudio CCS circuit
  126. Big voltage swing tube recommendation please
  127. Morgan Jones KT88 PP
  128. Mystery Tube Amplifier -- Help?????
  129. tube tester how can i tell if have match pair?
  130. Photo flash caps for the power supply?
  131. Finding bias point in PP fixed bias
  132. 6V6 Push Pull
  133. Transformer Mounting Braces
  134. Rozenblit 6as7 otl questions
  135. Genesis pre-amplifier schematic wanted
  136. 6H30PI/6922 Preamp Circuit
  137. PFB line amp
  138. 2A3C Mono plate: Shuguang Or Sovtek?
  139. Any kit reccomendation would be helpful
  140. Cleaning tubes...
  141. Anyone recognise these tubes...
  142. big ol' 26lb. output transformer...
  143. ECC88 Help
  144. European Triode Festival ETF08: still some places vacant!
  145. Dynaco MK IV Mystery
  146. 6as7/6080 Se Otl
  147. 6GW8 substitute tube 6BM8?
  148. Choke question
  149. Screen driven output stage
  150. Peavey Delta Blues Reverb Frustration
  151. 2a3 parallel driven 6sn7 schem
  152. WMD or Big Freakin Power Supply
  153. DIY My tube tester
  154. Help! May have dropped 12sn7 in place of 6sn7
  155. Got a bucketload of tubes, need identification
  156. Help from Allen Wright SuperReg owner
  157. Moscode 600
  158. Signal caps to keep on hand
  159. pin-compatible EF86 alternative?
  160. Capless Parafeed (with apologies to SY)
  161. T Eaton Viking schematics?
  162. S5 K-16LS mods, tweaks?
  163. 5687 fully balanced line stage
  164. Subminiature sockets
  165. What Do I Have Here?
  166. Bad vacuum?
  167. Th. Lösch Phono Amp: Question about IC used & ECC808 to ECC83
  168. Balanced 24V Aikido question
  169. How to wire a 'Buck' transformer
  170. OT question - will it work?
  171. ID Unknown Tube
  172. Time delay start board for tube amps
  173. Hum reduction ideas (again)
  174. Utc Ls-33
  175. K-16ls
  176. Potential valve damping tweak
  177. Conversion Tube PA and Bass Tone
  178. Wanted. Simple EL34 Push Pull Design
  179. PCB advice
  180. Hybrid voltage quadrupler?
  181. my fu80 amp
  182. Pre-amp for BeoMaster
  183. Question re: chokes
  184. Inundated Electrolytics
  185. power transformer recommendation
  186. PS decoupling cap placement
  187. USSR Russian Caps. KBG-MN or K75-24?
  188. #10SE Tested project
  189. schematics help
  190. HF Decoupling Caps questions
  191. 1A7 Heptode (Pentagrid Converter) Audio Preamplifier
  192. Useful power transformer design thread on Analogue
  193. Understanding Simple SE design choices
  194. Fender Pro Amp
  195. Hewlet Packard transformer
  196. 6BG6 for KT66
  197. new learning
  198. TV-7D/U Tube setting --- 6550
  199. ecc40 LTP
  200. Latest incarnation of music angel kt88
  201. Tubelab SE oscillation?
  202. 6SL7 5E3 - together at last?
  203. AN Shinri schematic wanted
  204. Found a box of old toobs
  205. Choke input filter LF noise
  206. Aikido line stage - plus phono line stage
  207. Hook up wire?
  208. Irritating problem with soft start
  209. OTL with 6AN5
  210. Mono Blocs Completed...
  211. Magic Eye for solid state Tuner?
  212. a question about drive power
  213. converting BAL to UNBAL using tubes and without transformers
  214. Aikiado question
  215. Top cap tubes+ arc welder
  216. Small beginner amplifier and hello :)
  217. Blackburn MicroTech TechTube(TM) Valves update!
  218. Resistor setup for integrated amp & headphones?
  219. Brook 2A3 PP amp ID help
  220. heater voltage
  221. kobayashi 300B push-pull
  222. Triode strapping a tetrode...
  223. Any info on 3572 Half wave Rectier
  224. Question Conrad Johnson reg. psu?
  225. Another 300B SE
  226. 7-pin Low Rp tube
  227. S-5 K-16LS Kit arrived in Germany !!
  228. Transcendar RIP?
  229. 6N6P in an Aikido?
  230. Were can i bay a Telefunken 6ak5 ?
  231. SE 245 driverstage
  232. 12ax7 srpp dac output
  233. How this circuit works (Baby Huey type)
  234. New tubeamp
  235. Snubber caps
  236. Counterpoint sa220
  237. Resistor before tube rectifier
  238. TCJ Push-Pull calculator v2
  239. Heathkit AG-9A audio generator schematic !!!
  240. Sources for James Transformers
  241. High Voltage Soldering (IPC Standards?)
  242. Speakers for Flea Powered Amps <1.5W
  243. Opinions on Allen & Bradley Carbon Composite resistors
  244. wich tube is best for the yaqin cd buffer ?
  245. Mikael Abdellah's SE KT88 bass response + tightness
  246. How best to use the PSU xformer I have
  247. 6L6GC AB2 Amp
  248. Kofi Annan in: "I'd Like Me a Mic Pre!"
  249. Too much gain - help with changing driver tube.
  250. EL95 SE schematic wanted

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