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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Silvertone 1484 help needed
  2. PEAVEY BRAVO 112 crunch channel bad switch?
  3. 78 Crate CR-1R, 72 Gibson G20, 2006 Randall RG 100 G3 100 watt valve dynamic
  4. Ampeg svt cl hum issues
  5. Polytone Mini Brute lll, lV, M-PA
  6. Need help trouble shooting peavey xl-500 mix amp
  7. Serious ?grounding? problem - kind of scary...
  8. Silvertone 1484 diode substitutes
  9. Trouble with Peavey Backstage 110 amp
  10. '67 Ampeg Jet, no trem & high voltage
  11. Buzz/click!-dead when switching off standby
  12. New Matamp schems
  13. Where to get replacement parts for a Fender Twin Reverb?
  14. Phase linear 700b help!
  15. Complete newbie to amp repair
  16. Peavey TNT Fuse blowing
  17. Park G10 amp at 4Ohm Speaker?
  18. Need schematic for a Crate VC6112
  19. Crate Blue Voodoo 120H acting up:
  20. Mesa DC-5, Massive Hum on Clean Channel
  21. My gibson amp
  22. Peavey Classic vtx series- Troubleshooting repair help needed!!!
  23. fender studio lead amp problem
  24. Dear god not the Selmer again... & PPIMV...
  25. Peavey VT Classic 212 Broken Phase Help
  26. Yamaha G50-112 owners manual wanted
  27. marshall atv100 have no distortion?
  28. Palomino V8 loud hum.
  29. 5e3 volume interaction
  30. SWR workingmans 15 Frying resistors
  31. 59 Bassman reissue cuts out after 10 minutes
  32. Crate Vintage 30
  33. peavey 5150 212 won't power on
  34. SVT 350 XLR out HUM
  35. 65 Twin Reverb Vibrato Problem. Please Help
  36. Ampeg SVT-6PRO death & resurrection
  37. Sunn Sceptre
  38. Blue Voodoo clean channel hiss without volume
  39. Peavey Ultra switching pops
  40. peavey400bh
  41. Princeton speaker rattling in the breeze
  42. solder type ????
  43. Randall RG200
  44. Fender Pro Tube Pro Reverb - Dead Tremolo and Noisy Reverb
  45. Fender Bassman
  46. Ampeg VL502 problem
  47. Power xfrmer wire color? Help!
  48. Could someone explain how this amp was working?
  49. fender stage 100 dsp 112 combo
  50. Peavey KB60 acting up
  51. overheating resistors
  52. please tell me its not a crate
  53. 5150iii channel two compressing
  54. Randall RG50TC problem
  55. how dangerous are floating ground amps (old Supro)
  56. volume loss Crate V32
  57. volume loss Crate V32
  58. Fender Stage 100 DSP
  59. Squire Champ 15/Fender Frontman 15(R)
  60. svt 4 pro going mute
  61. VHT Pitbull 50/12 Issues... Help!
  62. Peavey Studio 210
  63. B-52 AT100 very low volume/fuse blows when standby turned off
  64. Behringer GMX212 amplifier problem
  65. anyone have pic of cts alnico 10' speaker?
  66. Peavey Transtube Supreme Schematic
  67. Help me understand
  68. Channel 2 Fading Out
  69. 61 Reverberocket Reverb Problem
  70. More on Marshall TSL100
  71. Switched Tube Consequences?
  72. Can pulling tubes out one at a time help you locate hum?
  73. Burning 6L6 screen resistors
  74. Please help Marshall jmc 800 (2205) loud hum running out of things 2 look 4.
  75. Ampeg B4R Issue
  76. Replacement power transistors for old JC-120?
  77. Bridge Bad, Would You Replace Regulators?
  78. Diode question
  79. 59' reissue troubles, cracks and hisses
  80. Working Man's 12 blows fuse
  81. barcusberry 1601
  82. Mesa Express - Switching the transformer
  83. Wrong Transformer in Vibro Champ?
  84. Musicman 130 (2275-130) problems
  85. Locating loud hum/noise
  86. Damper diodes as rectifiers
  87. Fender Twin blowing fuses
  88. Fender Twin amp nasty buzz
  89. 16mm 10K Pot for line 6 source
  90. Marshall DSL 100 reissue - hum
  91. Isolation Transformer help
  92. 4x6L6 heater troubles
  93. G80rcd marshall
  94. 5F1 Distortion Like Blown Speaker
  95. Fender Hotrod Deluxe noice
  96. Acoustic 125 guitar combo issues.. no output!
  97. SS amp blues...
  98. Unknown orange PT wire
  99. Deluxe Reverb FAILED at gig!
  100. Peavey Classic30 troubleshooting help please
  101. Crate GFX 120 - Constant hum
  102. Ampeg GT10 Xsistor part number
  103. Help with hum in Vox AC15H1TV
  104. troubleshooting Ampeg B-15-N
  105. Trace Elliot lamp
  106. Hot Rod Deluxe...low volume, weird voltages
  107. Peavey Classic 50 2/12 question
  108. Bogner Alchemist
  109. Trace Elliot GP12
  110. Model T Reissue (Fender) w/ hole burnt in PCB... PT ok?
  111. Bassman 100
  112. SE 5F1-type bias ?
  113. Marshall JMP1 Preamp Clean Channel problem
  114. Fender Deluxe 900 static
  115. Vox AC4TV Buzz Problem
  116. 5F6-A Choke Problem/Questions?
  117. Faulty Laney VH100R
  118. Identify Vox capacitors?
  119. Power transformer gurgling
  120. crate TX50a limo
  121. Radio station coming in through Amp
  122. PCB Trace Repairs
  123. tech question on crate bx-100
  124. Vypyr, almost no low end... mods?
  125. marshall mg100 hdfx mute circuit ??
  126. farty bass problem, Bassman 10
  127. Mackie SWA1501
  128. Problem Behringher PMP 1280s
  129. Sunn Col 300 one thing after another...
  130. Fender red-knob "85" Cracks up.
  131. peavey triumph 60 lost gain channels
  132. Behringer MX 3282A mixer, no output
  133. Super Reverb Bias?
  134. Bad Buzz
  135. Marshall JCM 2000 DSL bias help
  136. Peavey Transtube EFX 212 Lost Balls, static distortion
  137. Ampeg SVT Classic - How Much Background hum is "normal"?
  138. Mesa Heartbreaker Head
  139. no sound from an AB763 clone
  140. Ampeg SVT4 Pro repair
  141. Bias adjustment SFSR
  142. Repairing an old Crate VC-3112W
  143. Can you guys help me understand what happened here?
  144. replacement power transformer for Spectra 212-T?
  145. Shielding question
  146. Neve pickup/preamp system dead
  147. vibro champ tone controls problem
  148. Marshall MG100HDFX Question
  149. DRRI & intermittent problems
  150. selmer trebble and bass 50r sv crackling sound and treble channel down
  151. Killed my Fluke 87 III
  152. Bias for AMPEG SVT 3 pro
  153. Broken volume pot on Valvestate 8080
  154. RCA 40409 & 40410 Transistors
  155. Acoustic 370 blows internal fuse when turned on
  156. EV 1.0kW
  157. Cliff jack nut thread/diameter?
  158. Hartke Model 2000 Repair
  159. boogie mk iv graphic
  160. Fender Twin PT Wires
  161. 68 bandmaster bass pot does nothing bass has disapeared
  162. Ampeg M15 hum
  163. Need supplier for Vox AD50VT PT
  164. Crate G40C will not switch channels!
  165. Mesa 2:90 Voltage Chart
  166. Anyone repair reverb tanks ?
  167. Steelphon GA810 Unknown fuse value
  168. Crate Vintage Club 50 Fixed/Cathode Bias Mod help
  169. How to bias a Silvertone 1482
  170. Reverb hum Valvestate VR65
  171. B-52 AT112 Repair Help
  172. Fender Hot Rod DeVille 212 screeching problem.
  173. high-pitch squeal
  174. Hum Help
  175. Marshall re-issue
  176. Gallien Kreuger 200mv
  177. New (old) amp dilemma....??
  178. Trying to fix loss of volume in a 1978 Randall RG300 Head (SS)
  179. Fender Silverface baffle trim material available for sale?
  180. Bass amps and fuzz pedals... OUCH
  181. Lonestar Special blows fuses
  182. Hum on blackface deluxe that goes when normal channel Vol 2/3 up???
  183. Fender FM212R Squeals at 4ohms, but not 8?
  184. crate limo TX-50D not working
  185. Bad Cat problem/questions
  186. Clean channel clipping low notes
  187. I've really done it this time
  188. Mesa Rocket 44 bias circuit mod?
  189. Blowing rectifier tubes
  190. Marshall EL34 100/100 Poweramp schematic
  191. debugging old peavey blues classic
  192. Heater pulsing normal?
  193. Fender Pro Jr Schematic Question
  194. questions about floating paraphase inverters
  195. Troubleshooting Selmer T'n'B Mk III
  196. Hot Rod Deville Bias Runaway
  197. Testing Mosfets in circuit
  198. Bad Buzzing in SF Bandmaster Reverb
  199. HUM preamp heater short?
  200. Fender '94 Twin Amp Noise...
  201. Nomination: Worst fuse holders ever
  202. Acoustic Control Corporation TO-220 transistor identification
  203. GK 600B resisto-roast
  204. Blue Glow Question
  205. Gibson EH-150
  206. AC30CC repair help/advice
  207. jcm 2000 dsl blowing tubes!
  208. Amp ticking
  209. Need specs. for Line 6 Amp
  210. Mesa Boogie Mark IV tube problem?
  211. Hiwatt custom 20 tube 60 hz hum ideas?
  212. Fender Performer 650
  213. ESR Meter / Tester
  214. hot air desoldering reflow station
  215. Peavey Triumph cuts out until it warms up.
  216. Peavey Classic 20 - Oops
  217. Ampeg SVT4 Pro failure
  218. Good Work Surface
  219. Another Problem with another Peavey Classic VTX 212 65 Watts
  220. I need schematics for crate stealth 50
  221. Marshall MG100HDFX low on volume.
  222. Fener BXR300C hum
  223. How do I internally join inputs in a plexi-style circuit ?
  224. noise noise noise
  225. Marshall AVT150H Blowing Fuses
  226. Berhinger PMP 5000
  227. Help with channel switching on the dreaded JCM2000DSL 100
  228. Tubes Help
  229. Peavey Combo 300 no output
  230. Ampeg v2 red plate help!
  231. Crate VC50 hot tranny/slight hum...
  232. Carlsbro 60 watt twin channel
  233. Stagepas 300
  234. Marshall JCM 2000 Super Lead - won't turn on
  235. Fender HR DeVille probs...
  236. Best High Current Connector
  237. Marshall Specialist tremolo not working
  238. Some info. On Line 6 AX2?
  239. Super Reverb Attempt to Clone with ugly distortion
  240. Sunn 300T signal gain
  241. Crate VC-3112 stuck on B channel. Help please.
  242. Crosstalk channel bleed trouble shooting
  243. Marshall AVT150H Repair help needed.
  244. "The Twin" Fender Amp bias adjust
  245. Crate V-100h Head Died
  246. Bugera Problem
  247. Dean Markly CD-30 Tube Amp has me baffled...
  248. Roland JC 120 effects loop
  249. Fender Performer 1000 problems
  250. Behringer PMH2000 schematic