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  1. New gain stage .. Opinions???
  2. Using SS to augment < 100Hz?
  3. A help with an soviet transformer.
  4. I thought that I had seen everything
  5. Triatic PP-amp with 6p14p
  6. Single 6N6P stereo pre-amp
  7. Tubelab SE input tube filament
  8. high frequency oscillation and decoupling question
  9. Long tailed pair schematic questions
  10. CCS Kit options
  11. Variac Question for Thatch_Ear
  12. 13e1
  13. Rogers Tube Amp
  14. Pair of McIntosh MC-60 on Dallas Craigslist
  15. Lundahl LL1517. What is it good for?
  16. Edcor OPT Voltage Rating?
  17. Which Tube to Start with?
  18. Basic Transformer hookup wiring
  19. Beta followers, biasing.
  20. 6W 2xEL519 Half-hybrid Class-A OTL
  21. Can a Class AB PP amp be said to be operating in Class A at low signal levels?
  22. Wiring / Layout question
  23. Yaqin MC10K
  24. help me lower the gain of this preamp pls
  25. How to wiring the transformer
  26. "universal" P-P driver board
  27. series or parallel?
  28. Question about Cathode bias in this Magnavox amp. . .
  29. GK71 B+ turn on delay
  30. Paralleling Triodes in a 6SN7GT
  31. 6C33C-B. PP or SE ?
  32. 6550 Triode B+
  33. Aikido Phono Pre.....any good???
  34. Tube Preamp L&amp;R Channel different current draw
  35. amp is dead!
  36. What you think about Ayon Audio Spark SE 6C33 tube 22 W
  37. Running stereo through a single tube with dual triodes?
  38. Looking for 6AQ5 audio preamp schematic!
  39. Quad KT88 oscillation problem
  40. El86 driving high beta bipolar power tr
  41. Installed 12&quot; Speaker in Pro Jr---Now What??
  42. How do I design a pentode constant current source plate load?
  43. Socket for 6AQ5
  44. new 845? Who produces it?
  45. Looking for a 45 SE Schematic
  46. Counterpoint SA-12 outputs 2SK134/2SJ49 work??
  47. Tube Amps left outdoors 24/7
  48. The beast OTL
  49. Input transformer: floating input = distortion
  50. Altmann's Split Feedback concept
  51. preamp for a JE LABS 2A3DX amp
  52. Phase flip needed -Interstage Transformer?
  53. Can your amp do this?
  54. AES out of 1625?
  55. Any info on Haltron 6BL8 tubes?
  56. Need Schematic for 12 Volt Tube Buffer
  57. Input impedance for Simple SE?
  58. SR-101 Pioneer Spring Reverb
  59. Basic Transformer Question - how do I know build possibilities?
  60. Source for 2.5VCT 5A filament transformers
  61. Nichicon VR VZ or GU
  62. Missing 6.3V CT/'Cockeyed Bridge' problem
  63. Best plate voltage for 6dj8 at +-6ma
  64. Max supply voltage for small DHT's
  65. Operating Temperature of KT88?
  66. First Tube Amp
  67. earthing advice on a US amp
  68. distortion at low volume
  69. interstage transformer cheating?
  70. PP EL34 or 6L6 circuits?
  71. Rectifier Capacator (voltage adjust)
  72. Passive RIAA and cap variation
  73. 6T9 push pull with Cathode Coupled input
  74. mixed bias
  75. Need help: tube DAC and Phono pre-amp
  76. Feedback equation
  77. Lafayette PA 675 Schematic ?
  78. phono preamp?
  79. Input tube recommendations...
  80. blind test tube preamp free for all
  81. Estimate Miller of Triode Strapped Pentode
  82. Tube Care for Prolonged Life
  83. bias resistor to use for a PP 300B?
  84. 12AY7 preamp schematic
  85. visio shapes
  86. vt25 in pre amp
  87. Wire Wound Pontentiometers - resistors
  88. Sound City B120
  89. Single supply 6922 buffer with 2SK CCS
  90. Aikido and 30W Class AB power buffer?
  91. Simple Pentode driver for a 45 ?
  92. Sennheiser HD 650 Question
  93. Edcor specs?
  94. hook up wire
  95. 6X5, 2x 6SL7 &amp; a 6v6GT....
  96. strange tube? E-8128
  97. Value of grid-leak resistor
  98. TubeTech Valves
  99. 1st build done.
  100. Tube socket does not fit tube
  101. 300B SET Bias Help
  102. This Connector for an Amp Umbilical?
  103. Chassis Grounding and rectifiers
  104. TechTube TM Blackburn status
  105. Protection of tubes/amp...
  106. 6sf5
  107. EF86 - Interstage transformer - EL84 PP AB
  108. Schadeode
  109. High-power amplifier using transmitting tubes
  110. Basic testing/meter question
  111. Mains voltage change for Sonic Frontiers SFS80 ?
  112. transformer unused secondary noobie question
  113. Acrosound High Power Williamson - HELP!!!!
  114. 300B Cathode Feedback + Cathode Bias
  115. "Budget" GM70 SET
  116. Chokes next to output transformers?
  117. Adding more power tubes and make a tube amp switching them?
  118. 1. time biasing...
  119. SE solution wanted
  120. tube rectifier
  121. Baldwin amp, yet another amp conversion project
  122. sorry, yet another newbie - what can I make with these???
  123. Design Help (load line) on a SE Mono Block Amp build
  124. Plate Choke SRPP…. What do think?
  125. Looking for a Fisher chassis 51 mono amp
  126. Majestic Transformers
  127. Inverted Mos HV soft start
  128. Strange S5 K-16LS oscilloscope readings
  129. Why don't pentodes require aligned grids?
  130. First design for a tube noob
  131. Newbie and ASL Wave 8 problems
  132. Evil Experiments - Hammond Paper in Oil Caps
  133. Now I know what this Tranny can do
  134. Pinnacle tubes??
  135. First Project.... and Hello
  136. VTL Integrator schematic
  137. Old transformators...
  138. 12AU7/12AT7/12AX7 preamp schmatic needed
  139. Booz preamp
  140. Mystery &quot;The Fisher&quot; console mono amp
  141. Voltage Doubler
  142. Gas Reference Tube (5651/85A1/etc) Internal Impedance
  143. Sakuma-San Pilgramage?
  144. Any HP 8903 audio analyzer owners?
  145. xL508/6KW6/17KW6
  146. 6C45 phono input only?
  147. Initial Thoughts for "Mr. Piggy" SE Amp w/Screen Driven 6P45S
  148. Switch box using VR glow tubes
  149. Ideas for a simple 6080/6AS7 Push-Pull amplifier
  150. TJ 845 Tubes
  151. Looking for a web tutorial on basic calculations
  152. Berman linestage- do I reference heaters or not?!
  153. calculating gain
  154. Simple EL84 amp...
  155. Tube Direct Box - Got design?
  156. Raphaelite Audio Transformers &amp; Sino Tube Amplifier Kits - What's your experience ?
  157. S-5 Electronics K-16LS & 6V6 Substitution
  158. how to calculate current requirement
  159. Stancor Transformer Data Sheet Needed
  160. 6BL7 replecement
  161. Toroid PT question
  162. New SET Amp
  163. What do you guys think..
  164. Output Stage in MJ Question
  165. Input voltage on an integrated tube amp
  166. 6sf5 = 1/2 12ax7?
  167. Observations of amplifier sound
  168. Sovtek KT88
  169. 24 or 24a as driver in 2 stage..?
  170. Too high transformator voltages...
  171. This power supply ok?
  172. 300B valves
  173. Modulation transformer for a driver transformer?
  174. Is 6V DC too low for heater filament?
  175. mundorff 0.47 silver in oil
  176. need manual for heathkit sp2
  177. Interresting Quiz. Which tube is this?
  178. el84 burn in time ?
  179. Tube Amp Compensation Q
  180. Quad II Advice
  181. Bias problem- 1 Socket shows extremely low bias!
  182. ECC88 vs E88CC
  183. Finally, back to my Simple SE project
  184. can trafo laminations rest on chassis?
  185. Ping Poindexter - 6SN7 Moebius Linestage Question
  186. More information wanted on this Phase Splitter Circuit
  187. Converting tube tester to Mutual Conductance
  188. 6UA4-GTA Question
  189. LED cathode bias - how to pick LED?
  190. preamp question
  191. Hickok tube tester calibration help needed
  192. Watch this !
  193. any Welborne Labs Ultrapath owners ?
  194. McIntosh transformer turns ratio
  195. 12E1 & S11E12 as a KT88 substitution
  196. Dynaco ST-70 Triode Conversion Techniques
  197. Larry Moore power supply
  198. SE to Balanced tube preamp idea
  199. Help on Cascode DN2540 CCS
  200. Kt88 Pp
  201. What was the diy world like before the internet?
  202. Updated my website
  203. Interstage question in 6ac5G design
  204. Using a powered sub with my tube amp
  205. 807pp suggestions and guidance please
  206. 2 stage IT coupled SE suggestions.?
  207. WE429A similar to 6V6?
  208. 6FQ7 in RH84
  209. What splitter for this design ?
  210. preamp kit?
  211. PP power supply design questions
  212. Hammond 1650P for KT88 PP - any experience?
  213. Cathode Bypass caps - how to choose?
  214. Marantz 9 output power switch
  215. Single ended KT88 question
  216. Anyone Have a Hickok 800A
  217. Please post your experience with 6C45 and 6H30
  218. Series-Shunt Regulator I need
  219. Hammond Gripe
  220. capacitors in series- what value balancing resistors?
  221. Substituting Pentode for Triode
  222. Pentode Driver Calculations
  223. DHT and speed issues
  224. Aikido vibration issue
  225. Modified Salas Mosfet Shunt Reg
  226. What if O.H. Schade had MOSFETs?
  227. Please Look at my circuit
  228. EL34 tube amp that needs work on
  229. question on differential stage
  230. Need help with my ST70, decrease in one channel
  231. Diff drive
  232. Stereo Aikido GND help
  233. Hashimoto HL-20K-6 Line Output Transformers
  234. What is the RIGHT way to calculate the Value of the cathode resistor?
  235. Kt88 Se
  236. ping Tom Schlangen
  237. Found An Old Transformer, Now What???
  238. Brook 22A restoration, HELP!!
  239. Optimal operating point for 7N7/6SN7?
  240. Loudness Control Calc - Help Please
  241. Kofi Annan in: "Cascodin' with Steve Bench's RIAA!"
  242. New 300B PP amp completed, phase shift questions
  243. One more PSU2 question
  244. 5U4 Darling power TX advice needed
  245. how to optimize this pentode PP (PP1 clone with S11E12)
  246. Can I change the input to a 6SL7?
  247. Outputtransformer to IGA 6550C ULPP
  248. Question on use PSUD2 software
  249. Please add to my confusion re stepup transformers
  250. filament power supply question

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