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  1. Missing 6.3V CT/'Cockeyed Bridge' problem
  2. Best plate voltage for 6dj8 at +-6ma
  3. Max supply voltage for small DHT's
  4. Operating Temperature of KT88?
  5. First Tube Amp
  6. earthing advice on a US amp
  7. distortion at low volume
  8. interstage transformer cheating?
  9. PP EL34 or 6L6 circuits?
  10. Rectifier Capacator (voltage adjust)
  11. Passive RIAA and cap variation
  12. 6T9 push pull with Cathode Coupled input
  13. mixed bias
  14. Need help: tube DAC and Phono pre-amp
  15. Feedback equation
  16. Lafayette PA 675 Schematic ?
  17. phono preamp?
  18. Input tube recommendations...
  19. blind test tube preamp free for all
  20. Estimate Miller of Triode Strapped Pentode
  21. Tube Care for Prolonged Life
  22. bias resistor to use for a PP 300B?
  23. 12AY7 preamp schematic
  24. visio shapes
  25. vt25 in pre amp
  26. Wire Wound Pontentiometers - resistors
  27. Sound City B120
  28. Single supply 6922 buffer with 2SK CCS
  29. Aikido and 30W Class AB power buffer?
  30. Simple Pentode driver for a 45 ?
  31. Sennheiser HD 650 Question
  32. ampeg svt 2 pro preamp problem
  33. Edcor specs?
  34. hook up wire
  35. 6X5, 2x 6SL7 & a 6v6GT....
  36. strange tube? E-8128
  37. Value of grid-leak resistor
  38. TubeTech Valves
  39. 1st build done.
  40. Tube socket does not fit tube
  41. 300B SET Bias Help
  42. This Connector for an Amp Umbilical?
  43. Chassis Grounding and rectifiers
  44. TechTube TM Blackburn status
  45. Protection of tubes/amp...
  46. 6sf5
  47. EF86 - Interstage transformer - EL84 PP AB
  48. Schadeode
  49. High-power amplifier using transmitting tubes
  50. Basic testing/meter question
  51. Mains voltage change for Sonic Frontiers SFS80 ?
  52. transformer unused secondary noobie question
  53. Acrosound High Power Williamson - HELP!!!!
  54. 300B Cathode Feedback + Cathode Bias
  55. "Budget" GM70 SET
  56. Chokes next to output transformers?
  57. Adding more power tubes and make a tube amp switching them?
  58. 1. time biasing...
  59. SE solution wanted
  60. tube rectifier
  61. Baldwin amp, yet another amp conversion project
  62. sorry, yet another newbie - what can I make with these???
  63. Design Help (load line) on a SE Mono Block Amp build
  64. Plate Choke SRPP…. What do think?
  65. Looking for a Fisher chassis 51 mono amp
  66. Majestic Transformers
  67. Inverted Mos HV soft start
  68. Strange S5 K-16LS oscilloscope readings
  69. Why don't pentodes require aligned grids?
  70. First design for a tube noob
  71. Newbie and ASL Wave 8 problems
  72. Evil Experiments - Hammond Paper in Oil Caps
  73. Now I know what this Tranny can do
  74. Pinnacle tubes??
  75. First Project.... and Hello
  76. VTL Integrator schematic
  77. Old transformators...
  78. 12AU7/12AT7/12AX7 preamp schmatic needed
  79. Booz preamp
  80. Mystery "The Fisher" console mono amp
  81. Cracks and hiss in tube guitar amp
  82. Voltage Doubler
  83. Gas Reference Tube (5651/85A1/etc) Internal Impedance
  84. Sakuma-San Pilgramage?
  85. Any HP 8903 audio analyzer owners?
  86. xL508/6KW6/17KW6
  87. 6C45 phono input only?
  88. Initial Thoughts for "Mr. Piggy" SE Amp w/Screen Driven 6P45S
  89. Switch box using VR glow tubes
  90. Ideas for a simple 6080/6AS7 Push-Pull amplifier
  91. TJ 845 Tubes
  92. Looking for a web tutorial on basic calculations
  93. Berman linestage- do I reference heaters or not?!
  94. calculating gain
  95. Simple EL84 amp...
  96. Tube Direct Box - Got design?
  97. Raphaelite Audio Transformers & Sino Tube Amplifier Kits - What's your experience ?
  98. S-5 Electronics K-16LS & 6V6 Substitution
  99. how to calculate current requirement
  100. Stancor Transformer Data Sheet Needed
  101. 6BL7 replecement
  102. Toroid PT question
  103. New SET Amp
  104. What do you guys think..
  105. Output Stage in MJ Question
  106. Input voltage on an integrated tube amp
  107. 6sf5 = 1/2 12ax7?
  108. Observations of amplifier sound
  109. Sovtek KT88
  110. 24 or 24a as driver in 2 stage..?
  111. Too high transformator voltages...
  112. This power supply ok?
  113. 300B valves
  114. Modulation transformer for a driver transformer?
  115. Is 6V DC too low for heater filament?
  116. mundorff 0.47 silver in oil
  117. need manual for heathkit sp2
  118. Interresting Quiz. Which tube is this?
  119. el84 burn in time ?
  120. Tube Amp Compensation Q
  121. Quad II Advice
  122. Bias problem- 1 Socket shows extremely low bias!
  123. ECC88 vs E88CC
  124. Finally, back to my Simple SE project
  125. can trafo laminations rest on chassis?
  126. Ping Poindexter - 6SN7 Moebius Linestage Question
  127. More information wanted on this Phase Splitter Circuit
  128. Converting tube tester to Mutual Conductance
  129. 6UA4-GTA Question
  130. oscilloscope turned guitar amp?
  131. LED cathode bias - how to pick LED?
  132. preamp question
  133. Hickok tube tester calibration help needed
  134. Watch this !
  135. any Welborne Labs Ultrapath owners ?
  136. McIntosh transformer turns ratio
  137. 12E1 & S11E12 as a KT88 substitution
  138. Dynaco ST-70 Triode Conversion Techniques
  139. Larry Moore power supply
  140. SE to Balanced tube preamp idea
  141. Help on Cascode DN2540 CCS
  142. Kt88 Pp
  143. What was the diy world like before the internet?
  144. Updated my website
  145. Marshall AVT 50 preamp gain/distortion increase
  146. Interstage question in 6ac5G design
  147. Using a powered sub with my tube amp
  148. 807pp suggestions and guidance please
  149. 2 stage IT coupled SE suggestions.?
  150. WE429A similar to 6V6?
  151. 6FQ7 in RH84
  152. Deluxe Reverb Re-Issue High Frequency Noise.
  153. What splitter for this design ?
  154. preamp kit?
  155. PP power supply design questions
  156. Hammond 1650P for KT88 PP - any experience?
  157. Gibson tube amp mod for JAZZ
  158. Cathode Bypass caps - how to choose?
  159. Marantz 9 output power switch
  160. Single ended KT88 question
  161. Anyone Have a Hickok 800A
  162. Please post your experience with 6C45 and 6H30
  163. Series-Shunt Regulator I need
  164. Hammond Gripe
  165. capacitors in series- what value balancing resistors?
  166. Substituting Pentode for Triode
  167. Pentode Driver Calculations
  168. DHT and speed issues
  169. Aikido vibration issue
  170. Modified Salas Mosfet Shunt Reg
  171. What if O.H. Schade had MOSFETs?
  172. Please Look at my circuit
  173. EL34 tube amp that needs work on
  174. question on differential stage
  175. Need help with my ST70, decrease in one channel
  176. Diff drive
  177. Stereo Aikido GND help
  178. Hashimoto HL-20K-6 Line Output Transformers
  179. What is the RIGHT way to calculate the Value of the cathode resistor?
  180. Kt88 Se
  181. ping Tom Schlangen
  182. Found An Old Transformer, Now What???
  183. Brook 22A restoration, HELP!!
  184. Optimal operating point for 7N7/6SN7?
  185. Loudness Control Calc - Help Please
  186. Kofi Annan in: "Cascodin' with Steve Bench's RIAA!"
  187. New 300B PP amp completed, phase shift questions
  188. One more PSU2 question
  189. 5U4 Darling power TX advice needed
  190. how to optimize this pentode PP (PP1 clone with S11E12)
  191. Can I change the input to a 6SL7?
  192. Outputtransformer to IGA 6550C ULPP
  193. Question on use PSUD2 software
  194. Please add to my confusion re stepup transformers
  195. filament power supply question
  196. Major Hum Problem
  197. FARMER LAMP amp
  198. Valve amp "master class"
  199. Toroid power transformers - are they a good idea?
  200. EL84 SE amplifier
  201. Gain Problems
  202. My SE KT-88 Build thread
  203. Rolling da(rling's) 6j4wa
  204. Phono pre amp
  205. Michealson Audio Da Vinci Preamp
  206. Acrosound PP 6550: Any Advice?
  207. PS idea: isolating transformer from load
  208. K-16LS Help Please
  209. 6N6P-I life-time
  210. Filament Xformer woes...
  211. The Use of 1:1 Input Transformers in Linestages
  212. 12hg7 vs 12hn7a
  213. Anyone familiar with VAC PA 90C1?
  214. Help restore an RCP 413 tube tester
  215. voltage reg make heat sink live. Bad idea?
  216. Audio Innovations series 800 reactivation + some mods
  217. Using 2 rectifiers off 1 power supply
  218. Tube power supply
  219. Improving low bass of a Scott 299c
  220. 1939 Radioshack Catalog online...Anyone have a time machine?
  221. VCCS filament supply for 813
  222. digital volume control
  223. Philips AD3800AM and AD9710AM clones
  224. MTP6N60E replacement
  225. Upgrading output transformers
  226. Cascode RIAA
  227. need a manual for selectron model 40 tube tester??
  228. Volume swinging problem
  229. How to use the almost Group buy Diyaudio CCS circuit
  230. Big voltage swing tube recommendation please
  231. Morgan Jones KT88 PP
  232. Mystery Tube Amplifier -- Help?????
  233. tube tester how can i tell if have match pair?
  234. Photo flash caps for the power supply?
  235. Finding bias point in PP fixed bias
  236. 6V6 Push Pull
  237. Transformer Mounting Braces
  238. Rozenblit 6as7 otl questions
  239. Genesis pre-amplifier schematic wanted
  240. 6H30PI/6922 Preamp Circuit
  241. PFB line amp
  242. 2A3C Mono plate: Shuguang Or Sovtek?
  243. Any kit reccomendation would be helpful
  244. Cleaning tubes...
  245. Anyone recognise these tubes...
  246. big ol' 26lb. output transformer...
  247. ECC88 Help
  248. European Triode Festival ETF08: still some places vacant!
  249. Dynaco MK IV Mystery
  250. 6as7/6080 Se Otl

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