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  1. need suggestion about MC pre-pre
  2. New gain stage .. Opinions???
  3. Using SS to augment < 100Hz?
  4. A help with an soviet transformer.
  5. I thought that I had seen everything
  6. Triatic PP-amp with 6p14p
  7. Single 6N6P stereo pre-amp
  8. Tubelab SE input tube filament
  9. high frequency oscillation and decoupling question
  10. Long tailed pair schematic questions
  11. CCS Kit options
  12. Variac Question for Thatch_Ear
  13. 13e1
  14. Rogers Tube Amp
  15. Pair of McIntosh MC-60 on Dallas Craigslist
  16. Lundahl LL1517. What is it good for?
  17. Edcor OPT Voltage Rating?
  18. Which Tube to Start with?
  19. Basic Transformer hookup wiring
  20. Beta followers, biasing.
  21. 6W 2xEL519 Half-hybrid Class-A OTL
  22. Can a Class AB PP amp be said to be operating in Class A at low signal levels?
  23. Wiring / Layout question
  24. Yaqin MC10K
  25. help me lower the gain of this preamp pls
  26. How to wiring the transformer
  27. "universal" P-P driver board
  28. series or parallel?
  29. Question about Cathode bias in this Magnavox amp. . .
  30. GK71 B+ turn on delay
  31. Paralleling Triodes in a 6SN7GT
  32. 6C33C-B. PP or SE ?
  33. 6550 Triode B+
  34. Aikido Phono Pre.....any good???
  35. Tube Preamp L&amp;R Channel different current draw
  36. amp is dead!
  37. What you think about Ayon Audio Spark SE 6C33 tube 22 W
  38. Running stereo through a single tube with dual triodes?
  39. Looking for 6AQ5 audio preamp schematic!
  40. Quad KT88 oscillation problem
  41. El86 driving high beta bipolar power tr
  42. Wikipedia article: Tube sound
  43. Installed 12&quot; Speaker in Pro Jr---Now What??
  44. How do I design a pentode constant current source plate load?
  45. Socket for 6AQ5
  46. new 845? Who produces it?
  47. Looking for a 45 SE Schematic
  48. Counterpoint SA-12 outputs 2SK134/2SJ49 work??
  49. Tube Amps left outdoors 24/7
  50. The beast OTL
  51. Input transformer: floating input = distortion
  52. Altmann's Split Feedback concept
  53. preamp for a JE LABS 2A3DX amp
  54. Phase flip needed -Interstage Transformer?
  55. Can your amp do this?
  56. AES out of 1625?
  57. Any info on Haltron 6BL8 tubes?
  58. Need Schematic for 12 Volt Tube Buffer
  59. Input impedance for Simple SE?
  60. SR-101 Pioneer Spring Reverb
  61. Basic Transformer Question - how do I know build possibilities?
  62. Source for 2.5VCT 5A filament transformers
  63. Nichicon VR VZ or GU
  64. Missing 6.3V CT/'Cockeyed Bridge' problem
  65. Best plate voltage for 6dj8 at +-6ma
  66. Max supply voltage for small DHT's
  67. Operating Temperature of KT88?
  68. First Tube Amp
  69. earthing advice on a US amp
  70. distortion at low volume
  71. interstage transformer cheating?
  72. PP EL34 or 6L6 circuits?
  73. Rectifier Capacator (voltage adjust)
  74. Passive RIAA and cap variation
  75. 6T9 push pull with Cathode Coupled input
  76. mixed bias
  77. Need help: tube DAC and Phono pre-amp
  78. Feedback equation
  79. Lafayette PA 675 Schematic ?
  80. phono preamp?
  81. Input tube recommendations...
  82. blind test tube preamp free for all
  83. Estimate Miller of Triode Strapped Pentode
  84. Tube Care for Prolonged Life
  85. bias resistor to use for a PP 300B?
  86. 12AY7 preamp schematic
  87. visio shapes
  88. vt25 in pre amp
  89. Wire Wound Pontentiometers - resistors
  90. Sound City B120
  91. Single supply 6922 buffer with 2SK CCS
  92. Aikido and 30W Class AB power buffer?
  93. Simple Pentode driver for a 45 ?
  94. Sennheiser HD 650 Question
  95. ampeg svt 2 pro preamp problem
  96. Edcor specs?
  97. hook up wire
  98. 6X5, 2x 6SL7 &amp; a 6v6GT....
  99. strange tube? E-8128
  100. Value of grid-leak resistor
  101. TubeTech Valves
  102. 1st build done.
  103. Tube socket does not fit tube
  104. 300B SET Bias Help
  105. This Connector for an Amp Umbilical?
  106. Chassis Grounding and rectifiers
  107. TechTube TM Blackburn status
  108. Protection of tubes/amp...
  109. 6sf5
  110. EF86 - Interstage transformer - EL84 PP AB
  111. Schadeode
  112. High-power amplifier using transmitting tubes
  113. Basic testing/meter question
  114. Mains voltage change for Sonic Frontiers SFS80 ?
  115. transformer unused secondary noobie question
  116. Acrosound High Power Williamson - HELP!!!!
  117. 300B Cathode Feedback + Cathode Bias
  118. "Budget" GM70 SET
  119. Chokes next to output transformers?
  120. Adding more power tubes and make a tube amp switching them?
  121. 1. time biasing...
  122. SE solution wanted
  123. tube rectifier
  124. Baldwin amp, yet another amp conversion project
  125. sorry, yet another newbie - what can I make with these???
  126. Design Help (load line) on a SE Mono Block Amp build
  127. Plate Choke SRPP…. What do think?
  128. Looking for a Fisher chassis 51 mono amp
  129. Majestic Transformers
  130. Inverted Mos HV soft start
  131. Strange S5 K-16LS oscilloscope readings
  132. Why don't pentodes require aligned grids?
  133. First design for a tube noob
  134. Newbie and ASL Wave 8 problems
  135. Evil Experiments - Hammond Paper in Oil Caps
  136. Now I know what this Tranny can do
  137. Pinnacle tubes??
  138. First Project.... and Hello
  139. VTL Integrator schematic
  140. Old transformators...
  141. 12AU7/12AT7/12AX7 preamp schmatic needed
  142. Booz preamp
  143. Mystery &quot;The Fisher&quot; console mono amp
  144. Cracks and hiss in tube guitar amp
  145. Voltage Doubler
  146. Gas Reference Tube (5651/85A1/etc) Internal Impedance
  147. Sakuma-San Pilgramage?
  148. Any HP 8903 audio analyzer owners?
  149. xL508/6KW6/17KW6
  150. 6C45 phono input only?
  151. Initial Thoughts for "Mr. Piggy" SE Amp w/Screen Driven 6P45S
  152. Switch box using VR glow tubes
  153. Ideas for a simple 6080/6AS7 Push-Pull amplifier
  154. TJ 845 Tubes
  155. Looking for a web tutorial on basic calculations
  156. Berman linestage- do I reference heaters or not?!
  157. calculating gain
  158. Simple EL84 amp...
  159. Tube Direct Box - Got design?
  160. Raphaelite Audio Transformers &amp; Sino Tube Amplifier Kits - What's your experience ?
  161. S-5 Electronics K-16LS & 6V6 Substitution
  162. how to calculate current requirement
  163. Stancor Transformer Data Sheet Needed
  164. 6BL7 replecement
  165. Toroid PT question
  166. New SET Amp
  167. What do you guys think..
  168. Output Stage in MJ Question
  169. Input voltage on an integrated tube amp
  170. 6sf5 = 1/2 12ax7?
  171. Observations of amplifier sound
  172. Sovtek KT88
  173. 24 or 24a as driver in 2 stage..?
  174. Too high transformator voltages...
  175. This power supply ok?
  176. 300B valves
  177. Modulation transformer for a driver transformer?
  178. Is 6V DC too low for heater filament?
  179. mundorff 0.47 silver in oil
  180. need manual for heathkit sp2
  181. Interresting Quiz. Which tube is this?
  182. el84 burn in time ?
  183. Tube Amp Compensation Q
  184. Quad II Advice
  185. Bias problem- 1 Socket shows extremely low bias!
  186. ECC88 vs E88CC
  187. Finally, back to my Simple SE project
  188. can trafo laminations rest on chassis?
  189. Ping Poindexter - 6SN7 Moebius Linestage Question
  190. More information wanted on this Phase Splitter Circuit
  191. Converting tube tester to Mutual Conductance
  192. 6UA4-GTA Question
  193. oscilloscope turned guitar amp?
  194. LED cathode bias - how to pick LED?
  195. preamp question
  196. Hickok tube tester calibration help needed
  197. Watch this !
  198. any Welborne Labs Ultrapath owners ?
  199. McIntosh transformer turns ratio
  200. 12E1 & S11E12 as a KT88 substitution
  201. Dynaco ST-70 Triode Conversion Techniques
  202. Larry Moore power supply
  203. SE to Balanced tube preamp idea
  204. Help on Cascode DN2540 CCS
  205. Kt88 Pp
  206. What was the diy world like before the internet?
  207. Updated my website
  208. Marshall AVT 50 preamp gain/distortion increase
  209. Interstage question in 6ac5G design
  210. Using a powered sub with my tube amp
  211. 807pp suggestions and guidance please
  212. 2 stage IT coupled SE suggestions.?
  213. WE429A similar to 6V6?
  214. 6FQ7 in RH84
  215. Deluxe Reverb Re-Issue High Frequency Noise.
  216. What splitter for this design ?
  217. preamp kit?
  218. PP power supply design questions
  219. Hammond 1650P for KT88 PP - any experience?
  220. Gibson tube amp mod for JAZZ
  221. Cathode Bypass caps - how to choose?
  222. Marantz 9 output power switch
  223. Single ended KT88 question
  224. Anyone Have a Hickok 800A
  225. Please post your experience with 6C45 and 6H30
  226. Series-Shunt Regulator I need
  227. Hammond Gripe
  228. capacitors in series- what value balancing resistors?
  229. Substituting Pentode for Triode
  230. Pentode Driver Calculations
  231. DHT and speed issues
  232. Aikido vibration issue
  233. Modified Salas Mosfet Shunt Reg
  234. What if O.H. Schade had MOSFETs?
  235. Please Look at my circuit
  236. EL34 tube amp that needs work on
  237. question on differential stage
  238. Need help with my ST70, decrease in one channel
  239. Diff drive
  240. Stereo Aikido GND help
  241. Hashimoto HL-20K-6 Line Output Transformers
  242. What is the RIGHT way to calculate the Value of the cathode resistor?
  243. Kt88 Se
  244. ping Tom Schlangen
  245. Found An Old Transformer, Now What???
  246. Brook 22A restoration, HELP!!
  247. Optimal operating point for 7N7/6SN7?
  248. Loudness Control Calc - Help Please
  249. Kofi Annan in: "Cascodin' with Steve Bench's RIAA!"
  250. New 300B PP amp completed, phase shift questions

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