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  1. Diode PIV
  2. What phase inverter style has the best output to linearity ratio?
  3. Steel String Singer
  4. Using 1r to measure plate current
  5. "best" passive balance speaker simulated line-out?
  6. Duncan's PSU - 12AX7/6V6/EL34 current?
  7. Need help with Mr. Crowhurst
  8. Designing for AB2
  9. Parallel SE
  10. Bias pots
  11. Distorting CC resistors
  12. Filter cap bleed resistor with 5AR4?
  13. 6v6 Ab2?????
  14. Hey Satamax - about that avatar ...
  15. Measuring voltages in a very high impedance circuit
  16. need help with wiring a speaker cab.
  17. Significance of Screen Grids?
  18. Mesa/Boogie MarkI Input Jack
  19. 4x6550 stereo power amp
  20. Any thoughts on a UL Twin?
  21. Hi-Gain LTP
  22. Touch Sensitivity
  23. Channel switching kits. Any?
  24. A "Dimed" Switch
  25. Want to build an Orange head
  26. 4X6V6 Cathode Bias
  27. circuitboard designs
  28. Wire and voltage/current requirements
  29. should I go for broke?
  30. larger tail resistor mistake?
  31. champ/princeton alternatives
  32. Phase Inverter and Reverb Phase
  33. Ideal 2xEL84 plate voltage
  34. Question about Power Tube Saturation
  35. Measuring PTs
  36. solid state amps
  37. Power scaling
  38. CFollowers direct coupled into output grids?
  39. "Response" control
  40. S/E OT "Karma"
  41. SE-EL34 Design Help
  42. Parallel vs. series vs. one filter cap
  43. Building with Mosfets
  44. Add diode clipping?
  45. 40ish watt amp through 30 watt speaker, dangerous?
  46. JJ cap can question
  47. heaters
  48. DC Filament Supply
  49. Corrective filters
  50. Transformer Differences
  51. 2xKT88's anyone?
  52. P/T bias winding?
  53. Grounded Cathode
  54. painted traces
  55. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  56. Adding 1x12" to a combo - impedance?
  57. Calculating load resistance?
  58. The Brick
  59. GZ34 with 50uf filter cap???? (Marshall Lead 20)
  60. 12ax7 24vac series heaters? can you...
  61. Engl Fireball - keeping the basic stuff
  62. Getting a 16 Ohm Speaker down to 8ohm
  63. Opinions on this circuit's potential?
  64. GZ34 lying about idle
  65. Marshall JTM45/100 550V!!!
  66. Heater Voltage & Todays Tube Recto's
  67. ac30/4 - dr.z stingray in one amp....but only 18watts
  68. Reverb with two tanks???
  69. What can I make with this transformer?
  70. Transformer questions
  71. OT Laminations - does thickness really matter?
  72. quiet channel switching relays
  73. Orange Amps
  74. Standard Amp "body" and "Limit" controls - what the hell are they?
  75. How To Lower Ac Filament Voltage?
  76. Screen grit resistors
  77. Small SE Xformer 2.5 K what use for it ?
  78. Tone stacks in Fender SS amps...
  79. Best Tremolo Circuits for Amp Build
  80. Cathode follower cathode resistor question
  81. parameters for push pull class A output?
  82. are single ended ot interleaved??
  83. Mesa MK series schemes, inaccuracies, anybody know?
  84. Effects Look in an AX84 October
  85. Vacuum Tube Op-Amp schematics
  86. Carbon Comps On Plates And Cathodes?
  87. transformer supplier
  88. Adjustable Zener circuit.
  89. Transformer current draw for 2xKT88
  90. Combo design with an external speaker jack
  91. Reverb driver circuit causing fartiness?
  92. Impedance Switch Current Rating?
  93. Another "junk iron" question
  94. 6550's in a marshall superlead.
  95. LDRs as pots?
  96. Any benefit for 2 Parallel 50 watt OTs?
  97. Help in finding or designing Schematic
  98. Will this work?
  99. VU Meter
  100. How does this work?
  101. What Values For Tone Circuit?
  102. cap can caps
  103. 120v Light Assembly: Interferes with Power?
  104. Measured Zoom G9.2tt voltages
  105. Full Wave vs. FWB
  106. Quick sanity check re presence control
  107. 80's marshall mods what were they doing?
  108. Help! Bias voltage from full wave bridge
  109. 2 channel single ended
  110. Tube amp basics
  111. Seymore Duncan Twin Tube Classic pedal
  112. XLR out without isolation-transformer
  113. High Gain Phase Inverter - MOSFET Follies 8-)
  114. Ampeg log pots: 10 or 30%
  115. Fender vs Marshall cap anxiety
  116. Mod to basic AC15 circuit
  117. 5R4 Test
  118. Speaker Switch Relay
  119. quick question about biasing a 5150
  120. split plate loads
  121. KT-88 UL screen Q
  122. Cathode bias el34 design
  123. wire ratings
  124. 12 VDC heaters confirmation
  125. Epiphone Valve junior
  126. Fixed bias for double single ended?
  127. Filter cap limit?
  128. fired up the super champ
  129. Spice model for OT?
  130. Feb '07 amp build seminar
  131. CF-driven phase inverter?
  132. Cabinet simulator and speaker load
  133. AC15 Schematic
  134. How to design with Schematic Program?
  135. Understanding cathode bias more
  136. 12bh7 for direct coupling
  137. CFs - to direct couple, or not?
  138. Making a good clean and distorted amp????
  139. Standby switch question
  140. torroidal PTs
  141. Long Tail Pair PI with signal to both grids
  142. Adding line out
  143. Matchless DC30 preamp
  144. overdrive circuit
  145. Output Tube Saturation BOX
  146. Simple pot question
  147. Cut control questions
  148. Help - PA Amp for guitar - increasing output?
  149. 12AU7s or 6N1Ps?
  150. headphone jack?
  151. Replacing 6N7 with 6SL7?
  152. 6L6EH Bias for SE amp
  153. Connecting 2 amps to 1 speaker
  154. ECL80 question.
  155. 6AN8A or 7199 as input tube?
  156. new build/pics with 6AU6A pentode preamp
  157. Question about unequal OT primaries and push-pull
  158. AC30 with 6V6s, help with tweaking...
  159. Duncan's TSC Question
  160. Time to get an O-scope...tips?
  161. Need history lesson on 4210 circuit changes
  162. Difference between 5150 and 5150 II?
  163. putting together a SE marshallish amp
  164. Switching circuit load on PT bias tap question
  165. building an amp: Variac
  166. max. uF rating NOS 5Y3GT
  167. 6V6 Grid-Cathode Cap on SF Vibrochamp -- Why?
  168. Determining Size of Choke
  169. Couple Questions
  170. updated new build pics/schemo 6AU6
  171. Grid stopper value?
  172. A Stupid Ohm's Law Problem
  173. 6GE8 as reverb tube, etc.?
  174. Another O-scope thread: Multiplexer?
  175. 5AR4 used with four 6L6s?
  176. 6V6 cathode-bias level & tube idle-bias...
  177. Bass preamp - inductor driven midrange - help!
  178. Oscilloscope roundup?
  179. Vox Tone Stack Weirdness
  180. Help Building a Champ??
  181. 'Scope has arrived...triggering?
  182. Determining current capacity of a htr winding
  183. 5e3, 6V6 grid wire routing
  184. Marshall 2205 Volume and Gain Controls
  185. Need help with preamp power x-former selection PLEASE!!!
  186. Harmonic Vibrato
  187. 2 channel champ with BF tonestacks
  188. Switching 2 amps into 1 cab
  189. protoboards for tube design?
  190. Question about 6L6 to EL34 mod in a Fender
  191. Question about heater wiring in a Champ build
  192. 20W SLO project
  193. Electro Harmonix 6v6gt, New build
  194. Wiring difference
  195. Power Scaled Express build complete
  196. Power supply filter caps?
  197. line out circuits at speaker
  198. decoupling caps
  199. Cathode vs Fixed
  200. The 'Marshall' Sound
  201. 30 Watt Class A
  202. internal DI box
  203. Mid Control For Fender E-Series?
  204. Center tap impedance?
  205. Ceriatone Parts
  206. Marshall must be confident...
  207. Peavey Ultra 60
  208. Mark IV EQ
  209. Single ended OT absolutely needs to be air gapped?
  210. Fasel wah inductor use in preamp
  211. Fender Tweed/Marshall question
  212. Bass pre-amp
  213. Newbie question, Half Power?
  214. Tone Stack Calculator
  215. Tube Amp Power Trans voltage question....
  216. Regulated supply LFO vibrato???
  217. Componenet Spacing
  218. Spring reverb 1, DSP 0
  219. How To get Fixed Bias when you Don't Have a Bias Tap
  220. Why Does the Vibrato Ch on Fender amps sound better
  221. 8 & 16 ohm taps at the same time
  222. Regenerative feedback sustainer???
  223. IsoCab
  224. LDR VTL5C3 Response Time?
  225. Coupling Capacitor Leakage Current?
  226. Technical Books On-Line
  227. Resistor Safeguards Leaky Coupling Capacitor?
  228. What would YOU build in a...
  229. DC Elevation for heater CT
  230. If I use 1/2 of 12ax7
  231. Point-to-point wiring or turret board?
  232. Z-mounting a stand-up
  233. Tone stack question(s)
  234. Filter values...specifically screen grid node
  235. Questions about Fast, Ultra-Fast, Hyper- Recovery Diodes
  236. Best of British / USA + modern / vintage
  237. Primary impedance for 4x6L6?
  238. Rocket Clone
  239. Amp design based on Ampeg R12RT
  240. Wire Color ?
  241. Tweed preamp with reverb
  242. strange interstage divider, why would a company do it this way
  243. OT Inductance vs High Freq Response
  244. Mojo Oil Filled Caps
  245. Which Orange Drop?
  246. Primary Z early Portaflexes
  247. Overfiltering?
  248. Does a cathod follower invert the phase?
  249. SE Amp - How Many Watts?
  250. Mesa subway rocket power section