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  1. microphonic tubes
  2. Grounding schemes
  3. OEI and Mercury Magentics Transformers
  4. Impedence for Matchless at half power?
  5. Bias Tool
  6. Route 66 bias.
  7. grill cloth and tolex source
  8. Speaker vs. guitar cables
  9. PA-related question
  10. Which tubes for DRRI ?
  11. Mono/Stereo cab wiring..How?
  12. JJ ECC83S VS. Sovtek 12AX7LPS
  13. What type/brand of wire do you use to wire up your speakers in your cab?
  14. Rivera Rake: Intermittent Tube
  15. pickup hieght
  16. Imoh?
  17. Weber Bias Rite?
  18. Purple thing blew up. :(
  19. Amp not turning on, HELP!!!
  20. How to use 220V Marshall in U.S.??
  21. Adding Stereo/Mono Switch to 4x12 Cab
  22. Series/Parallel wiring question
  23. Amp Crackle When Turned On
  24. Amp making strang noises...
  25. How do I find out how many Ohms my amp is?
  26. Is it me or the Z?
  27. Can Bad PWR Tube damage amp or preamp tubes??
  28. New Allen Amplification Power/Output Trannys
  29. volume decreasing
  30. Plate current
  31. swapping rectifier tubes
  32. Parts sources
  33. JJ tubes?
  34. Amp Shutdown
  35. Resistors
  36. Variac
  37. Ashdown Amps / Marshall
  38. reverb
  39. Amp acting funny
  40. preamp vs. poweramp (basic question)
  41. Wiring question -- speaker phase
  42. Which filter caps for a '66 Twin Reverb?
  43. Tone wise, what`s the difference?
  44. amp damage from having no speaker hooked up
  45. Amp makes fizzy noise when passing signal
  46. Weber Copper Cap Rectifiers are not what they seem
  47. UK Transformer Source + Champ questions
  48. Tubes vs Solid State - the real difference
  49. Late 60's Twin Reverb question
  50. Advice on building a speaker cab...
  51. Amp Volume Factors
  52. "Re-Capping" An Amp
  53. Can tubes and tones change after a couple of hours?
  54. Amp Troubleshooting
  55. What exactly are "caps?"
  56. Old Marshall Speaker Settings
  57. a couple of questions about 6550 tubes?
  58. Can you run 2 heads into a Marshall stereo 4x12?
  59. HELP! Tube question for '69 Deluxe Reverb
  60. mesa dual recto combo
  61. Line out Question
  62. Cabinet Impedances
  63. Dumb Ohm Guy
  64. Sorta Dumb ohm Guy Pt II
  65. Amp modding questions: impedance, new chassis
  66. 70,s twin
  67. shipping amps in this new world market economy
  68. Cabinet Power Handling - How to determine?
  69. 6L6 vs. 7581 swap out...
  70. I'm really confused about bias
  71. 100 Watt amp through 100 watt cab
  72. Help and instruction for the new guy
  73. on the behringer PMX2000 !! inputs would be appreciated...
  74. "Slave" into a power amp
  75. Rectifier Tubes???
  76. Tubes for Budda SuperDrive 30 II
  77. Name that Rectifier?
  78. Just curious - EL34/84s
  79. How to re-glue tolex on Maz 18?
  80. What to clean potentiometers with?
  81. Rectifier tube substitution
  82. Why are transformers so important in amp tone?
  83. Alessandro making a funny popping noise
  84. Att Mesa Rectifier Owners
  85. Sovtek 12AX7LPS
  86. Martha Stewart's new amp mag
  87. Wiring a cab for switchable impedence?
  88. Marshall DSL50 feedback
  89. Marshall 2204 mods
  90. Mesa MK III footswitches
  91. Biasing a Peavey C30??
  92. Amp volume pots
  93. Hard to find guitar wiring schematic
  94. Fixed bias / Cathode bias - Z's
  95. My Shiva rattles - please help
  96. Tubey tendencies
  97. Possible Problem with Marhsall DSL: need some advice
  98. Microphonic Tubes
  99. 1967 Vibro-Champ
  100. Maz 18 - Hum - Humidity
  101. transformers
  102. kinda embarrassed to ask...but
  103. Mullard EL34
  104. Pre-amp output/Power amp input-style Effects Loop question
  105. Plastic jacks - any hope?
  106. Angela Amps
  107. 3 what ? possible or not ?
  108. Yellow Jackets and Alternatives
  109. Amp Repair Literature?
  110. 71 marshall imedance question
  111. Glowing plates - is this OK?
  112. Presence control not working - help!
  113. changing tubes
  114. wacky question
  115. Lowering B+
  116. Selmer question--Unquiet, anyone
  117. Calling Unquiet ...
  118. help: Mounting a 12V DC Fan?
  119. DrZ Maz 18JR Bias Question
  120. Hot Cat rectifier tube options
  121. Help - Toroidal power transformer
  122. Mesa Amp with Digitech RP300
  123. Weber Blues Ceramic Or Alnico?
  124. Practice amp kit
  125. Weber version of Greenback
  126. Speaker wire question?
  127. Bassman project
  128. Where to buy Tubes? Production and NOS
  129. Replacement Output Transformer
  130. Pro Reverb please help!!!!!!
  131. Kendrick/Trainwreck project
  132. '68 twin reverb-reverb/tube questions!
  133. Help....Glitch noise in my TR Custom
  134. Amp repair/tech in Philly??
  135. Pros and cons of rectified?
  136. Hooking up multiple amps
  137. Hoffman board kit question
  138. Variac
  139. Using SWR California Blonde for Bass
  140. Channel jumpering question
  141. Mesa Nomad power tubes question
  142. Tubes Versus Transistors
  143. Bias modulated trem help
  144. Weber load dump or Mini-Mass
  145. Speaker Frequecy Graphs???
  146. How does bias mod trem work?
  147. easy question (I think)
  148. Replacing tube rectifier with solid state plug
  149. I Think the Caps in my '62 Fender Brown Princeton 6G2 are Shot
  150. Want to understand your amp better?
  151. Tube question
  152. Sovtek 12AX7WA vs Sovtek 12AX7LP
  153. How Do the Big Guys Break In Their Speakers??
  154. Would a power conditioner tame the intermittent buzz in my house?
  155. class A, cathode bias, and tube life
  156. Tube questions from a tube doofus
  157. Attenuator Y/N ?
  158. Build Suggestions/Recommendations
  159. Impedance/Resistance
  160. How do you measure OPT impedance?
  161. Ever heard an OPT actually make vibration noises??
  162. microphonic tubes question
  163. hellhound crackles?!?!?
  164. EL84 question
  165. EI 12AX7s in a Soldano
  166. 12AX7/ECC83 Valve life
  167. Can One of You Uber-Techs Explain the Numbers and Letters To Me?
  168. effects loop
  169. Shiva FX Loop question
  170. Need Help With With Preamp Tubes In a Maz Sr.
  171. Effects loop problem
  172. Two heads, One cab?
  173. Good source for grill cloth, jacks and other amp building supplies
  174. New valves..must I re-bias?
  175. Series / Parallel wiring question (speakers)...
  176. Please help me find this transistor
  177. Removal of Feedback Circuit?
  178. Which soldering Iron?
  179. twin reverb inputs
  180. Tubes for Marshall Bluesbreaker RI
  181. Pre-Amp Tube Shields
  182. Older Matchless preamp tubes?
  183. fixing a reverb tank
  184. Boogie Mark IV Question.
  185. Bewildered, but not shocked!...........[tube biasing question]
  186. Can I safely swap preamp tubes w/amp on in standby?
  187. 2 in one day! Those silver preamp tube shields ...
  188. Tone King Meteor reverb update mod....
  189. Cosmetic Issue: Removing/Replacing Trim Piping??
  190. 6l6 swap with el-34? Bogner Shiva??
  191. Aluminum vs. Copper for a chassis?
  192. 6BG6GA for a 6l6GC - too good to be true?
  193. Tech. question re speaker suitability for closed or open back cabs
  194. ID 12AX7A's on line???
  195. Hum on clean channel only
  196. KT66s - Me like a lot
  197. Univalve problem
  198. building a 2*12 cab
  199. Best Tweed Kit?
  200. is it safe to run 8 ohm into 16 ohm?
  201. tube tester recommendations?
  202. 18 vs 22 vs 18 watts: Amp volume
  203. Installing a trim pot
  204. ID these 12ax7's
  205. How dumb am I? (amp troubleshooting)
  206. Channel switching/cable question
  207. Any amp techs looking for an odd project to work on?
  208. Power Supply Caps question.
  209. guitar amp voltage question
  210. Very old (new to me) amp
  211. Favorite sounding caps and resistors
  212. Preamp tube sequence in the Carr Rambler...
  213. Fender Chassis In Music Man Cab?
  214. Star Ground?
  215. U.S.A Wiring
  216. Mullard 6v6's in my Marshall 1987
  217. Most important components for tone
  218. Doping speakers
  219. JBL D120 F repair?
  220. bassman heads and phase
  221. Mounting a Bias Pot?
  222. Fender Prosonic improvements?
  223. Retubing a blackface Bandmaster
  224. Voltages too high on a Jim Kelley amp.. what to do?
  225. hey.. i need help with my vibro champ
  226. Tube Replacement Soldano
  227. FX Loop Question
  228. Upgrading power and output trannies....
  229. Tube Shields
  230. FX loop...........
  231. Amp techs in Philadelphia, PA
  232. Speaker wiring...
  233. Cone cry on celestion speakers, or ?!?
  234. Slave outs
  235. Intermittent Amp Operation, Please HELP!
  236. Wiring a 4X10 cab
  237. Newbie Question - Connecting to 1936 cabinet
  238. A new tube design?
  239. Bassman Mods???
  240. Ground (earth) Color HELP QUICK
  241. Additional speaker wiring questions...and MORE!
  242. 60 or 50HZ does it matter (Hogy)
  243. Half-power the simple way?
  244. Cathode bias and NFB
  245. Amp power versus wattage
  246. Tearing Down A 6L6GC
  247. Dr. Z Maz Jr............
  248. Can you Help me look at this Diagram?
  249. Cabinet wiring question
  250. Anyone have the 80s Dumble Schematic