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  1. [Question] Ground Error?
  2. TOMIKO OPT-SE, any good?
  3. 6550 Williamson - Low Bass Response...
  4. Preamp design question
  5. Reading Oscilloscope Traces -For Dummies
  6. Power Supply Question
  7. PI Question Guitar Amp Related
  8. Altec 1568A modifications for comments and help…. again
  9. H & K Tube 20 unruly gain
  10. Electro-Harmonix interview
  11. Using LED bias for 4.5 mA cathode current, is it a good idea?
  12. amp dead?
  13. 7189 vs EL84 +458v plate
  14. What does your Aikido drive?
  15. Help with Decware SE84 Kit!
  16. Hybrid Amplifier in Small cases
  17. audio mixer with tubes?
  18. Epiphone Galaxy 25 transformer problem
  19. Help with KT88 biasing
  20. Bad Schottky??
  21. Aikido Diagnostic
  22. Could this become a Baby Huey killer ?
  23. SV83 vs EL84
  24. KT88 PP-5 Monoblock Amplifier
  25. RE604 SET amp
  26. Dropping rectifier filament voltage
  27. need suggestion about MC pre-pre
  28. New gain stage .. Opinions???
  29. Using SS to augment < 100Hz?
  30. A help with an soviet transformer.
  31. I thought that I had seen everything
  32. Triatic PP-amp with 6p14p
  33. Single 6N6P stereo pre-amp
  34. Tubelab SE input tube filament
  35. high frequency oscillation and decoupling question
  36. Long tailed pair schematic questions
  37. CCS Kit options
  38. Variac Question for Thatch_Ear
  39. 13e1
  40. Rogers Tube Amp
  41. Pair of McIntosh MC-60 on Dallas Craigslist
  42. Lundahl LL1517. What is it good for?
  43. Edcor OPT Voltage Rating?
  44. Which Tube to Start with?
  45. Basic Transformer hookup wiring
  46. Beta followers, biasing.
  47. 6W 2xEL519 Half-hybrid Class-A OTL
  48. Can a Class AB PP amp be said to be operating in Class A at low signal levels?
  49. Wiring / Layout question
  50. Yaqin MC10K
  51. help me lower the gain of this preamp pls
  52. How to wiring the transformer
  53. "universal" P-P driver board
  54. series or parallel?
  55. Question about Cathode bias in this Magnavox amp. . .
  56. GK71 B+ turn on delay
  57. Paralleling Triodes in a 6SN7GT
  58. 6C33C-B. PP or SE ?
  59. 6550 Triode B+
  60. Aikido Phono Pre.....any good???
  61. Tube Preamp L&amp;R Channel different current draw
  62. amp is dead!
  63. What you think about Ayon Audio Spark SE 6C33 tube 22 W
  64. Running stereo through a single tube with dual triodes?
  65. Looking for 6AQ5 audio preamp schematic!
  66. Quad KT88 oscillation problem
  67. El86 driving high beta bipolar power tr
  68. Wikipedia article: Tube sound
  69. Installed 12&quot; Speaker in Pro Jr---Now What??
  70. How do I design a pentode constant current source plate load?
  71. Socket for 6AQ5
  72. new 845? Who produces it?
  73. Looking for a 45 SE Schematic
  74. Counterpoint SA-12 outputs 2SK134/2SJ49 work??
  75. Tube Amps left outdoors 24/7
  76. The beast OTL
  77. Input transformer: floating input = distortion
  78. Altmann's Split Feedback concept
  79. preamp for a JE LABS 2A3DX amp
  80. Phase flip needed -Interstage Transformer?
  81. Can your amp do this?
  82. AES out of 1625?
  83. Any info on Haltron 6BL8 tubes?
  84. Need Schematic for 12 Volt Tube Buffer
  85. Input impedance for Simple SE?
  86. SR-101 Pioneer Spring Reverb
  87. Basic Transformer Question - how do I know build possibilities?
  88. Source for 2.5VCT 5A filament transformers
  89. Nichicon VR VZ or GU
  90. Missing 6.3V CT/'Cockeyed Bridge' problem
  91. Best plate voltage for 6dj8 at +-6ma
  92. Max supply voltage for small DHT's
  93. Operating Temperature of KT88?
  94. First Tube Amp
  95. earthing advice on a US amp
  96. distortion at low volume
  97. interstage transformer cheating?
  98. PP EL34 or 6L6 circuits?
  99. Rectifier Capacator (voltage adjust)
  100. Passive RIAA and cap variation
  101. 6T9 push pull with Cathode Coupled input
  102. mixed bias
  103. Need help: tube DAC and Phono pre-amp
  104. Feedback equation
  105. Lafayette PA 675 Schematic ?
  106. phono preamp?
  107. Input tube recommendations...
  108. blind test tube preamp free for all
  109. Estimate Miller of Triode Strapped Pentode
  110. Tube Care for Prolonged Life
  111. bias resistor to use for a PP 300B?
  112. 12AY7 preamp schematic
  113. visio shapes
  114. vt25 in pre amp
  115. Wire Wound Pontentiometers - resistors
  116. Sound City B120
  117. Single supply 6922 buffer with 2SK CCS
  118. Aikido and 30W Class AB power buffer?
  119. Simple Pentode driver for a 45 ?
  120. Sennheiser HD 650 Question
  121. ampeg svt 2 pro preamp problem
  122. Edcor specs?
  123. hook up wire
  124. 6X5, 2x 6SL7 &amp; a 6v6GT....
  125. strange tube? E-8128
  126. Value of grid-leak resistor
  127. TubeTech Valves
  128. 1st build done.
  129. Tube socket does not fit tube
  130. 300B SET Bias Help
  131. This Connector for an Amp Umbilical?
  132. Chassis Grounding and rectifiers
  133. TechTube TM Blackburn status
  134. Protection of tubes/amp...
  135. 6sf5
  136. EF86 - Interstage transformer - EL84 PP AB
  137. Schadeode
  138. High-power amplifier using transmitting tubes
  139. Basic testing/meter question
  140. Mains voltage change for Sonic Frontiers SFS80 ?
  141. transformer unused secondary noobie question
  142. Acrosound High Power Williamson - HELP!!!!
  143. 300B Cathode Feedback + Cathode Bias
  144. "Budget" GM70 SET
  145. Chokes next to output transformers?
  146. Adding more power tubes and make a tube amp switching them?
  147. 1. time biasing...
  148. SE solution wanted
  149. tube rectifier
  150. Baldwin amp, yet another amp conversion project
  151. sorry, yet another newbie - what can I make with these???
  152. Design Help (load line) on a SE Mono Block Amp build
  153. Plate Choke SRPP…. What do think?
  154. Looking for a Fisher chassis 51 mono amp
  155. Majestic Transformers
  156. Inverted Mos HV soft start
  157. Strange S5 K-16LS oscilloscope readings
  158. Why don't pentodes require aligned grids?
  159. First design for a tube noob
  160. Newbie and ASL Wave 8 problems
  161. Evil Experiments - Hammond Paper in Oil Caps
  162. Now I know what this Tranny can do
  163. Pinnacle tubes??
  164. First Project.... and Hello
  165. VTL Integrator schematic
  166. Old transformators...
  167. 12AU7/12AT7/12AX7 preamp schmatic needed
  168. Booz preamp
  169. Mystery &quot;The Fisher&quot; console mono amp
  170. Cracks and hiss in tube guitar amp
  171. Voltage Doubler
  172. Gas Reference Tube (5651/85A1/etc) Internal Impedance
  173. Sakuma-San Pilgramage?
  174. Any HP 8903 audio analyzer owners?
  175. xL508/6KW6/17KW6
  176. 6C45 phono input only?
  177. Initial Thoughts for "Mr. Piggy" SE Amp w/Screen Driven 6P45S
  178. Switch box using VR glow tubes
  179. Ideas for a simple 6080/6AS7 Push-Pull amplifier
  180. TJ 845 Tubes
  181. Looking for a web tutorial on basic calculations
  182. Berman linestage- do I reference heaters or not?!
  183. calculating gain
  184. Simple EL84 amp...
  185. Tube Direct Box - Got design?
  186. Raphaelite Audio Transformers &amp; Sino Tube Amplifier Kits - What's your experience ?
  187. S-5 Electronics K-16LS & 6V6 Substitution
  188. how to calculate current requirement
  189. Stancor Transformer Data Sheet Needed
  190. 6BL7 replecement
  191. Toroid PT question
  192. New SET Amp
  193. What do you guys think..
  194. Output Stage in MJ Question
  195. Input voltage on an integrated tube amp
  196. 6sf5 = 1/2 12ax7?
  197. Observations of amplifier sound
  198. Sovtek KT88
  199. 24 or 24a as driver in 2 stage..?
  200. Too high transformator voltages...
  201. This power supply ok?
  202. 300B valves
  203. Modulation transformer for a driver transformer?
  204. Is 6V DC too low for heater filament?
  205. mundorff 0.47 silver in oil
  206. need manual for heathkit sp2
  207. Interresting Quiz. Which tube is this?
  208. el84 burn in time ?
  209. Tube Amp Compensation Q
  210. Quad II Advice
  211. Bias problem- 1 Socket shows extremely low bias!
  212. ECC88 vs E88CC
  213. Finally, back to my Simple SE project
  214. can trafo laminations rest on chassis?
  215. Ping Poindexter - 6SN7 Moebius Linestage Question
  216. More information wanted on this Phase Splitter Circuit
  217. Converting tube tester to Mutual Conductance
  218. 6UA4-GTA Question
  219. oscilloscope turned guitar amp?
  220. LED cathode bias - how to pick LED?
  221. preamp question
  222. Hickok tube tester calibration help needed
  223. Watch this !
  224. any Welborne Labs Ultrapath owners ?
  225. McIntosh transformer turns ratio
  226. 12E1 & S11E12 as a KT88 substitution
  227. Dynaco ST-70 Triode Conversion Techniques
  228. Larry Moore power supply
  229. SE to Balanced tube preamp idea
  230. Help on Cascode DN2540 CCS
  231. Kt88 Pp
  232. What was the diy world like before the internet?
  233. Updated my website
  234. Marshall AVT 50 preamp gain/distortion increase
  235. Interstage question in 6ac5G design
  236. Using a powered sub with my tube amp
  237. 807pp suggestions and guidance please
  238. 2 stage IT coupled SE suggestions.?
  239. WE429A similar to 6V6?
  240. 6FQ7 in RH84
  241. Deluxe Reverb Re-Issue High Frequency Noise.
  242. What splitter for this design ?
  243. preamp kit?
  244. PP power supply design questions
  245. Hammond 1650P for KT88 PP - any experience?
  246. Gibson tube amp mod for JAZZ
  247. Cathode Bypass caps - how to choose?
  248. Marantz 9 output power switch
  249. Single ended KT88 question
  250. Anyone Have a Hickok 800A

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