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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Peavey Classic 50 repair
  2. SWR SM-900 - no signal at preamp. Anyone got a schematic?
  3. 1997 Fender Vibrolux rattle sound!
  4. orange thunderverb
  5. Peavey Encore 65 blows fuse
  6. Peavey 5150 combo OT specifications
  7. SVT 7 pro no speaker output
  8. Should I buy this amp?
  9. Peavey Mace 320T
  10. Solder prices...
  11. Peavey Studio Pro 112 Transtube Red Stripe Hum
  12. Marshall 2098 Solid State Lead 100 Repair
  13. 1978 fender twin reverb problems...please help
  14. Ampeg SVT4 pro blown power channel
  15. Fender Stage 185 not making any sound
  16. Fender bandmaster
  17. troubleshooting low volume on a tube amp...
  18. Fender Princeton Reverb Silverface crackling
  19. Polytone Mini Brute II Problem
  20. Peavey Classic 30 - Speaker Short
  21. Fender 5f1 volume loss, overly compressed
  22. Hartke bass cab,input problem
  23. New Build... When the tone control is dimed I get crackle and volume diminishes.
  24. Tech soldering question ..
  25. danelectro honeytone amp.
  26. Bugera 333xl 212 Static and Popping
  27. Feedback in reverb Bandamaster Reverb AA1069
  28. Crate GX-212 Need Reverb Tank Part Number
  29. Peavey XR560 PA head
  30. 66 Fender Bassman hum
  31. Rose Morris AC30 Hum
  32. Fender roc pro 1000 help
  33. ho HUM... hum is driving me nuts
  34. mystery output transformer impedance
  35. SVT 4 Pro hum
  36. amp and speaker ohm help
  37. Blues Junior Buzz
  38. Recapping Filter Cap Clamps
  39. 450+ plate volts from 360v source @ the rectifier???? 6v6 amp
  40. Epiphone Valve Standard - Dropped --> VERY loud Whine/Hum
  41. Speaker switching suggestions for Vox
  42. high pitched squeal from my peavey XXL combo?
  43. 3 amps, same fault in one week: arced-over power tube sockets
  44. Problem with Valvestate 8280
  45. Help with switch wiring Vox V125
  46. Carvin x 60 b problems
  47. Trying to fix a broken Carlsbro Cobra 90 Series "Sherwood" amp
  48. VOX VC4 Foot Controller for Valvetronix (broken bus jack)
  49. Peavey Mark III Bass Head
  50. MArshall AVT 150H inadvertent loss of gain and high pitch squeals.
  51. 92PU06 Crossover?
  52. Magna Electronics Co. Melodier Model M-194-4-J bad OT?
  53. I thought speaker mounting holes were standardized?
  54. Peavey Valveking blows fuses
  55. grounding a 6.3V CT to reduce hum
  56. Best High Quality E- Caps
  57. ampeg reverbrocket2 ps voltage problem?????
  58. Ampeg SVT-400T Thump/DC On Power On
  59. Vox V125 Assistance?
  60. Marshall jcm 900 2100 noisy buzz/hiss/squeal
  61. Vox AC30cc2x HT Fuse Holder
  62. Ampeg Gemini VI - Can't Crank It
  63. Bugera BVP5500 fault
  64. Guya-tone GA-830. Low output.
  65. 73 Super Reverb RIZES from the dead
  66. Marshall G15R CD Has a Hum Increased with Second gain Increase????
  67. Problem with Boogie MkIIa
  68. Vox Royal Gaurdsman - normal channel low volume?
  69. Bad Sozo caps???
  70. Fender Twin amp won't power on
  71. Marshall 5212 Split Fifty Problem
  72. good place to insert an effect loop
  73. Amp fuses
  74. Randall RH200 - Unknown Resistor
  75. High Power Resistors Getting Hot - Too Hot?
  76. Help with Vox AC30 CC2
  77. Enzo, MarkusBass, and other SVT 4-Pro Masters
  78. Bugera 1990 help
  79. Princeton Reverb rebuild
  80. How do I test an adjustable voltage regulator in my guitar preamp?
  81. Setting up a 66 blackface for bass
  82. Super reverb preamp pin voltages
  83. Recommendation for oscilloscope test leads for guitar amps.
  84. cathode bypass caps voltage in princeton reverb
  85. Trouble with Mesa Stiletto Deuce
  86. Peavey Triple XXX Head has strange problem Please Help
  87. Bugera 333 Channel Switching Circuit
  88. Yamaha MagicStomp
  89. Fender M-80 Combo amp Mods or revisions on power supply or circuit?
  90. ADA MicroTube Output Design
  91. Tremolux 5G9 - tremolo not working
  92. Trace Elliott Commando killing output transistors
  93. Advice about multiple circuts
  94. Sunn Beta Bass preamp troubles
  95. Audio generator recommendation for n00b.
  96. Fender M-80 Combo amd 1x12 needing a schematic
  97. 73 Super Reverb
  98. Peavey Ultra (Mega) combo problems
  99. Fender Twin Reverb Reissue distorted reverb
  100. Ampeg "Joey"???
  101. Traynor Guitar Mate Reverb
  102. Spider jam schematics
  103. Have I killed my output tranny?
  104. Troubleshooting by Tube Substitution a Fender Twin Reverb
  105. Operadio pia125
  106. elevated heater center tap
  107. Fender Blues Jr III - FX Loop negates reverb
  108. MESA Mk3 reverb question
  109. Jcm 900 mkiii direct line out buzz
  110. Peavey Classic 50 Main transformer
  111. Transistor Crossover part help
  112. Bassman 200 Power Transformer?
  113. Peavey Classic 50 50 Power Amp Bias mod/repair
  114. Blackfaced Fender Twin Reverb Master Vol buzzing
  115. Fendet twin reverb osillating when the reverb depth is increased
  116. ADA MicroTube 100 Popping Fuses
  117. Peavey Studio Chorus smoking resistor
  118. Carvin X-50B with glowing second grids of EL34
  119. taking the blanket off a Valveking...
  120. Fixing my Peavey rage 158. What kinda pots and any mods while im in there.
  121. GMX212 Doenst record my presets!
  122. Crate Vintage Club 30 Squeal
  123. The Peavey 6505 and a New Failure Mode
  124. Fender Bassman 135; what to do with that voltage divider?
  125. How do you find a break in a cable?
  126. JC 120 wont turn on help please
  127. Marshall jcm 2000 dsl blowing ht fuse.
  128. Hot Rod Deville BAD Oscillation On More Drive
  129. Silvertone 1471 rehab
  130. Old panaramic amp, reverb and tremolo issues
  131. Help troubleshooting treble pot issue
  132. Ampeg V2
  133. Power trans "gurgling"
  134. CompuBias readings on 1974 Vibrolux... does it seems "cold"?
  135. Marshall Valvestate 2000 avt150 fuse help plus.
  136. Marshall JCM2000 Power Transformer - Taps For 220V?
  137. Mesa MK IV footswitch system
  138. Koch Amp burnt PCB
  139. Fender Hot Rod Deluxe Reverb Buzzing
  140. Hot Rod Deville With Harsh Crackle/Distortion
  141. Crackle in Marshall VS100
  142. Peavey Bass Mark III 400BH won't power on
  143. SVT4-pro question
  144. Marshall Valvestate 8100 / 8080 Shorting Output
  145. replacing 2 prong ac cord
  146. While biasing a Fender Tremolux (AA763) the biasing is current is increasing?
  147. FX loop buzz only when unplugged again
  148. Valveking troubles
  149. short bursts of hi freq squeal?
  150. Marshall DSL 100 overall volume issue
  151. Line 6 Spider 2 head trouble
  152. Lets try again..>AC30TB clone build trouble
  153. tag board wiring
  154. Backline 600 schematic
  155. Peavey Delta Blues 30 (15x1)
  156. need information about lŽacoustics 112p monitor
  157. Is a rebias needed if using the same tubes?
  158. Distortion issue – question about bias
  159. Acoustic Model120 Part identification
  160. Marshall Haze MHZ15 Bias Clarification
  161. old Egnater ie4 preamp died!, smells burnt!, help!
  162. 120 Hz hum on a solid state amp is usually...
  163. Blues DeVille pots?
  164. Geloso G226-A troubles
  165. squealing reverb in a Supro Corsica
  166. Fender Frontman FM25R channel switching problem
  167. Ashdown thermal problem
  168. Ab763 weak tremolo issue
  169. figuring out rectified DC volts; reversing a transformer
  170. Need a CTS pot for Crate amp?
  171. I'm looking for the red led for a 4 button Fender Twin Amp footswitch
  172. Am I missing something??
  173. Roland Cube 60 has 50 mV of DC offset.... What is considered too much?
  174. Yamaha G100-112 series II - parametric EQ pops
  175. need part # for VOX
  176. DUH!
  177. Deluxe Reverb rectifier tube
  178. Peavey Butcher Low Voltages
  179. crate gx-130c
  180. voltage divider for a power source
  181. Bugera Amps
  182. Peavey XXX and JJ E34L problem???
  183. Gemini VI GS-15R Schematic question - balance the output tubes
  184. Fender Vibro-King CSR4 tremolo speed issue...
  185. Sovtek Mig-60 blowing fuse
  186. Where can I find a 10k Audio slider control for my old Carvin
  187. Fender Studio Amp grill cloth trim
  188. Bassman20 Fun&Games&Agony
  189. bizarre power supply issue
  190. Blackheart LG Head - no sound
  191. Marshall Valvestate 80V (8080) problem
  192. Hot Rod deluxe intermittent volume loss problem
  193. Tube Amp Shutting Off
  194. Tube blown or what?
  195. Any of you a T.C. Electronics warranty station? Need a part
  196. Biasing A Red Knob Dual Showman
  197. Variac (GE Volt-pac) Wiring Guidance Requested
  198. Fender M80 bass amp distortion on output
  199. peavey mace power transformer failure
  200. Peavey TKO bass amp
  201. irritating "sheen" on "A" notes
  202. Gibson GA 20 RVT - Tremelo Opt-coupler (500) replacement?
  203. Connector Problems
  204. Low distorted output, no channel switching on Blues Deluxe
  205. Champ blowing fuse
  206. Ampix
  207. SWR SM-900 Troubles
  208. replacement rectifier
  209. Signal related crackle
  210. Kustom PC 5065
  211. JCM800 head with oscillating volume + pops and hum
  212. AC30 with intermittent volume
  213. What's the best glue to secure filter caps?
  214. 4x6v6 amp not loud?
  215. HotRod Deville motorboats only on Drive channel
  216. Peavey VTM 60
  217. Peavey Classic 30 cant handle low end from 2001 Gibson R8 Les Paul
  218. Peavey Windsor Studio The output tube el 34 bournd out
  219. Is this a screen resistor problem?
  220. Laney L5-112T efx loop problem.
  221. Peavey classic 50/50 240V wiring
  222. Carlsbro GLX 80 Limited Edition - Crackling on clean channel
  223. DIY AA764 Champ Squeals Loudly
  224. How do I open a Fishman Loudbox?
  225. Is anybody familiar with the Peavey Classic 100 top?
  226. Bugera 333xl Sudden Reverb Circuit Hiss
  227. 5150 II tubes
  228. Acoustic G60T Combo - No channel switching
  229. Boston area source for tubes and amp parts
  230. Bad Cat Hot Cat "Gain" channel static noise?
  231. Need a replacement tube/pwr supply pcb for DSL100
  232. Blackstar 100 head, power tubes redplate
  233. Vintage amp issues
  234. Cathode bias *cap* issue - weird whistle
  235. Need help with a Fender Stage 160
  236. Crate V100H, Loud Technologies, Parts, Replacement Power Supply
  237. Weird bias loss!
  238. Marshall tsl fx loop bleed - help needed!
  239. 65 Twin Reissue problems
  240. Ampeg BA-115T keeps blowing fuses!
  241. Fender stage 100 blowing outputs
  242. measuring low value resistors
  243. Marshall MG15DFX clicking andpopping when turned on
  244. AVT 150 problem please help me
  245. SWR 350 problem
  246. silvertone 1484 filter cap can replacement
  247. How can I reduce hum in a Fender Champ?
  248. keep blowing the same capacitor
  249. Kustom K50 Main PCB Mounted 'Can' Style Diode(?) Help
  250. Ampeg SVT 3 pro PT secondaries