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  1. Any HP 8903 audio analyzer owners?
  2. xL508/6KW6/17KW6
  3. 6C45 phono input only?
  4. Initial Thoughts for "Mr. Piggy" SE Amp w/Screen Driven 6P45S
  5. Switch box using VR glow tubes
  6. Ideas for a simple 6080/6AS7 Push-Pull amplifier
  7. TJ 845 Tubes
  8. Looking for a web tutorial on basic calculations
  9. Berman linestage- do I reference heaters or not?!
  10. calculating gain
  11. Simple EL84 amp...
  12. Tube Direct Box - Got design?
  13. Raphaelite Audio Transformers & Sino Tube Amplifier Kits - What's your experience ?
  14. S-5 Electronics K-16LS & 6V6 Substitution
  15. how to calculate current requirement
  16. Stancor Transformer Data Sheet Needed
  17. 6BL7 replecement
  18. Toroid PT question
  19. New SET Amp
  20. What do you guys think..
  21. Output Stage in MJ Question
  22. Input voltage on an integrated tube amp
  23. 6sf5 = 1/2 12ax7?
  24. Observations of amplifier sound
  25. Sovtek KT88
  26. 24 or 24a as driver in 2 stage..?
  27. Too high transformator voltages...
  28. This power supply ok?
  29. 300B valves
  30. Modulation transformer for a driver transformer?
  31. Is 6V DC too low for heater filament?
  32. mundorff 0.47 silver in oil
  33. need manual for heathkit sp2
  34. Interresting Quiz. Which tube is this?
  35. el84 burn in time ?
  36. Tube Amp Compensation Q
  37. Quad II Advice
  38. Bias problem- 1 Socket shows extremely low bias!
  39. ECC88 vs E88CC
  40. Finally, back to my Simple SE project
  41. can trafo laminations rest on chassis?
  42. Ping Poindexter - 6SN7 Moebius Linestage Question
  43. More information wanted on this Phase Splitter Circuit
  44. Converting tube tester to Mutual Conductance
  45. 6UA4-GTA Question
  46. oscilloscope turned guitar amp?
  47. LED cathode bias - how to pick LED?
  48. preamp question
  49. Hickok tube tester calibration help needed
  50. Watch this !
  51. any Welborne Labs Ultrapath owners ?
  52. McIntosh transformer turns ratio
  53. 12E1 & S11E12 as a KT88 substitution
  54. Dynaco ST-70 Triode Conversion Techniques
  55. Larry Moore power supply
  56. SE to Balanced tube preamp idea
  57. Help on Cascode DN2540 CCS
  58. Kt88 Pp
  59. What was the diy world like before the internet?
  60. Updated my website
  61. Marshall AVT 50 preamp gain/distortion increase
  62. Interstage question in 6ac5G design
  63. Using a powered sub with my tube amp
  64. 807pp suggestions and guidance please
  65. 2 stage IT coupled SE suggestions.?
  66. WE429A similar to 6V6?
  67. 6FQ7 in RH84
  68. Deluxe Reverb Re-Issue High Frequency Noise.
  69. What splitter for this design ?
  70. preamp kit?
  71. PP power supply design questions
  72. Hammond 1650P for KT88 PP - any experience?
  73. Gibson tube amp mod for JAZZ
  74. Cathode Bypass caps - how to choose?
  75. Marantz 9 output power switch
  76. Single ended KT88 question
  77. Anyone Have a Hickok 800A
  78. Please post your experience with 6C45 and 6H30
  79. Series-Shunt Regulator I need
  80. Hammond Gripe
  81. capacitors in series- what value balancing resistors?
  82. Substituting Pentode for Triode
  83. Pentode Driver Calculations
  84. DHT and speed issues
  85. Aikido vibration issue
  86. Modified Salas Mosfet Shunt Reg
  87. What if O.H. Schade had MOSFETs?
  88. Please Look at my circuit
  89. EL34 tube amp that needs work on
  90. question on differential stage
  91. Need help with my ST70, decrease in one channel
  92. Diff drive
  93. Stereo Aikido GND help
  94. Hashimoto HL-20K-6 Line Output Transformers
  95. What is the RIGHT way to calculate the Value of the cathode resistor?
  96. Kt88 Se
  97. ping Tom Schlangen
  98. Found An Old Transformer, Now What???
  99. Brook 22A restoration, HELP!!
  100. Optimal operating point for 7N7/6SN7?
  101. Loudness Control Calc - Help Please
  102. Kofi Annan in: "Cascodin' with Steve Bench's RIAA!"
  103. New 300B PP amp completed, phase shift questions
  104. One more PSU2 question
  105. 5U4 Darling power TX advice needed
  106. how to optimize this pentode PP (PP1 clone with S11E12)
  107. Can I change the input to a 6SL7?
  108. Outputtransformer to IGA 6550C ULPP
  109. Question on use PSUD2 software
  110. Please add to my confusion re stepup transformers
  111. filament power supply question
  112. Major Hum Problem
  113. FARMER LAMP amp
  114. Valve amp "master class"
  115. Toroid power transformers - are they a good idea?
  116. EL84 SE amplifier
  117. Gain Problems
  118. My SE KT-88 Build thread
  119. Rolling da(rling's) 6j4wa
  120. Phono pre amp
  121. Michealson Audio Da Vinci Preamp
  122. Acrosound PP 6550: Any Advice?
  123. PS idea: isolating transformer from load
  124. K-16LS Help Please
  125. 6N6P-I life-time
  126. Filament Xformer woes...
  127. The Use of 1:1 Input Transformers in Linestages
  128. 12hg7 vs 12hn7a
  129. Anyone familiar with VAC PA 90C1?
  130. Help restore an RCP 413 tube tester
  131. voltage reg make heat sink live. Bad idea?
  132. Audio Innovations series 800 reactivation + some mods
  133. Using 2 rectifiers off 1 power supply
  134. Tube power supply
  135. Improving low bass of a Scott 299c
  136. 1939 Radioshack Catalog online...Anyone have a time machine?
  137. VCCS filament supply for 813
  138. digital volume control
  139. Philips AD3800AM and AD9710AM clones
  140. MTP6N60E replacement
  141. Upgrading output transformers
  142. Cascode RIAA
  143. need a manual for selectron model 40 tube tester??
  144. Volume swinging problem
  145. How to use the almost Group buy Diyaudio CCS circuit
  146. Big voltage swing tube recommendation please
  147. Morgan Jones KT88 PP
  148. Mystery Tube Amplifier -- Help?????
  149. tube tester how can i tell if have match pair?
  150. Photo flash caps for the power supply?
  151. Finding bias point in PP fixed bias
  152. 6V6 Push Pull
  153. Transformer Mounting Braces
  154. Rozenblit 6as7 otl questions
  155. Genesis pre-amplifier schematic wanted
  156. 6H30PI/6922 Preamp Circuit
  157. PFB line amp
  158. 2A3C Mono plate: Shuguang Or Sovtek?
  159. Any kit reccomendation would be helpful
  160. Cleaning tubes...
  161. Anyone recognise these tubes...
  162. big ol' 26lb. output transformer...
  163. ECC88 Help
  164. European Triode Festival ETF08: still some places vacant!
  165. Dynaco MK IV Mystery
  166. 6as7/6080 Se Otl
  167. 6GW8 substitute tube 6BM8?
  168. Choke question
  169. Screen driven output stage
  170. Peavey Delta Blues Reverb Frustration
  171. 2a3 parallel driven 6sn7 schem
  172. WMD or Big Freakin Power Supply
  173. DIY My tube tester
  174. Help! May have dropped 12sn7 in place of 6sn7
  175. Got a bucketload of tubes, need identification
  176. Help from Allen Wright SuperReg owner
  177. Moscode 600
  178. Signal caps to keep on hand
  179. pin-compatible EF86 alternative?
  180. Capless Parafeed (with apologies to SY)
  181. T Eaton Viking schematics?
  182. S5 K-16LS mods, tweaks?
  183. 5687 fully balanced line stage
  184. Subminiature sockets
  185. What Do I Have Here?
  186. Bad vacuum?
  187. Th. Lösch Phono Amp: Question about IC used & ECC808 to ECC83
  188. Balanced 24V Aikido question
  189. How to wire a 'Buck' transformer
  190. OT question - will it work?
  191. ID Unknown Tube
  192. Time delay start board for tube amps
  193. Hum reduction ideas (again)
  194. Utc Ls-33
  195. K-16ls
  196. Potential valve damping tweak
  197. Conversion Tube PA and Bass Tone
  198. Wanted. Simple EL34 Push Pull Design
  199. PCB advice
  200. Hybrid voltage quadrupler?
  201. my fu80 amp
  202. Pre-amp for BeoMaster
  203. Question re: chokes
  204. Inundated Electrolytics
  205. power transformer recommendation
  206. PS decoupling cap placement
  207. USSR Russian Caps. KBG-MN or K75-24?
  208. #10SE Tested project
  209. schematics help
  210. HF Decoupling Caps questions
  211. 1A7 Heptode (Pentagrid Converter) Audio Preamplifier
  212. Useful power transformer design thread on Analogue
  213. Understanding Simple SE design choices
  214. Fender Pro Amp
  215. Hewlet Packard transformer
  216. 6BG6 for KT66
  217. new learning
  218. TV-7D/U Tube setting --- 6550
  219. ecc40 LTP
  220. Latest incarnation of music angel kt88
  221. Tubelab SE oscillation?
  222. 6SL7 5E3 - together at last?
  223. AN Shinri schematic wanted
  224. Found a box of old toobs
  225. Choke input filter LF noise
  226. Aikido line stage - plus phono line stage
  227. Hook up wire?
  228. Irritating problem with soft start
  229. OTL with 6AN5
  230. Mono Blocs Completed...
  231. Magic Eye for solid state Tuner?
  232. a question about drive power
  233. converting BAL to UNBAL using tubes and without transformers
  234. Aikiado question
  235. Top cap tubes+ arc welder
  236. Small beginner amplifier and hello :)
  237. Blackburn MicroTech TechTube(TM) Valves update!
  238. Resistor setup for integrated amp & headphones?
  239. Brook 2A3 PP amp ID help
  240. heater voltage
  241. kobayashi 300B push-pull
  242. Triode strapping a tetrode...
  243. Any info on 3572 Half wave Rectier
  244. Question Conrad Johnson reg. psu?
  245. Another 300B SE
  246. 7-pin Low Rp tube
  247. S-5 K-16LS Kit arrived in Germany !!
  248. Transcendar RIP?
  249. 6N6P in an Aikido?
  250. Were can i bay a Telefunken 6ak5 ?

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