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View Full Version : Maintenance, Troubleshooting & Repair


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  1. Blues Deville 4x10, flooded, no reverb
  2. SWR Workingmans 15" humming
  3. ampeg VL 1002
  4. Peavey GPS 900 pwr amp
  5. epiphone special
  6. Need help finding output transformer for Gibson BR-1 amp.
  7. Problem with +/- 15 supply to op amps
  8. SOVTEK Midget 50 Head blowing main fuse
  9. Princeton Reverb problems
  10. Allen Accomplice actin' funny
  11. Orange Rockerverb - Reverb -real 'bong-ie' sounding
  12. Crown K1 Volume Pots
  13. Flash Upon Power Up
  14. Behringer PMP3000
  15. Blues Jr. reverb problem
  16. Peavey 400BH blows fuse
  17. Fender Bassman Blackface '64 restore
  18. How to determine faults
  19. Problems w/ Hiwatt lead 50 head
  20. Ampeg v4-b problems
  21. PEAVEY - Rage 12 Watt - Problem
  22. Peavey Combo 300 problems
  23. What parts to save?
  24. Celestion G12T-75 Speaker Rattle problem
  25. Traynor YBA-1A...low distorted output.
  26. Strange preamp voltages in a Gibson GA-5 (like 5F1 tweed Champ)
  27. Fender Sidekick 35-Reverb Troubles
  28. Classic 50/212 Mod Trouble
  29. Fender Twin Reverb Silverface Repair Issue
  30. Fender Blues DeVille Hiss Problem
  31. boogie studio 22+ power transf substitute.
  32. Marshall Super bass red plating
  33. JCM800 6550 tube substitution and fuses
  34. Crate CPB150
  35. Fender Super-Sonic Driving Ground
  36. LR Baggs Acoustic Reference
  37. Crate G130cxl chorus "rate" pot value
  38. JCM 600 troubles
  39. How does a Tube Rectifier fail?
  40. Peavey Basic 60 Static
  41. Ampeg BA-115 Style Switch Cuts Out
  42. Noisy Silvertone 1484
  43. what's my next step up in solder irons?
  44. Peavey Artist VT,,need some help!
  45. I accidently installed a helicopter in my dumbleator!
  46. Marshall AVT150H losing power in OD2 channel
  47. Fender Blues Deluxe Components Source
  48. Buzz when touching polepieces
  49. bugera 333xl back with new info
  50. Amp Problem
  51. Peavey Classic 50/50 issues
  52. Fender Champ problems
  53. Fender Blues Deluxe Help
  54. Peavey Deuce SS preamp section
  55. Can I slow down this trermolo? - GA-5T
  56. Heath ta-16
  57. stuck rail
  58. Please tell me why I got a horrible shock
  59. Ampeg VT120 Acting Funny
  60. mesa boogie become monophonic
  61. Kustom 200 question
  62. New Peavey Vypyr 15 (problem?)
  63. Music Man 210 (chasis 2275-65)
  64. Peavey Minx 110 cutting in and out
  65. Roland JC120 issues
  66. Boogie - odd voltages
  67. fx loop sucking tone
  68. Marshall wires dsl 100
  69. volume drops, then goes. help?
  70. Peavey Express 112 Sheffield
  71. Best 30-40W tube design?
  72. Marshall MG 15 DFX and Valvestate VS schematics
  73. Madison Divinity II Head volume problems
  74. Gallien Krueger 700RB II - Bad Ground
  75. JCM 900-4100 preamp question
  76. Test equipment......
  77. Peavey Mace doesn't power up anymore
  78. Marshall AVT275 - No Sound From Main Speakers
  79. marshall vs 100 need help
  80. PIN Chart/Diagram
  81. 12dw7/ecc832
  82. Peavey TNT 100 Problem/ Questions
  83. Hot Rod Deville 212
  84. Fender Sidekick 35- transformer substitution
  85. Keyboard - Internal Zip drive
  86. 1966 Bandmaster and 60Hz hum....?
  87. Fender performer 1000 ( PR 209)
  88. Peavey XR 680c Volume cuts&Jumps
  89. HR Deville problem....?
  90. Late 90's Peavey Transtube Supreme repair (power transistor questions)...
  91. Stage 160 pre amp into FM 212 power amp question
  92. Fender Blues DeVille Faceplate?
  93. Thanks For The Help!
  94. MPSU95 sub?
  95. Transformer testing?
  96. New 5150 owner, need some help
  97. Peavey Duel 212 problem
  98. AC30SS hi-res schematics
  99. Crate RFX 65 RetroFex Hum
  100. Peavey 400 B/G Mark III Bass Amp Problem
  101. Acoustic 270 repair
  102. 7189 questions
  103. Peavey encore 65
  104. Need ampage v-4 filter caps
  105. Bassman 100 tubes drawing low current
  106. Silvertone 1484 Twin Twelve Tremolo Not Working
  107. Wire colors JMP 50 OT?
  108. 12v transformer for relays
  109. silvertone 1484 reverb(?)
  110. peavey PV-4C trips reset Switch
  111. Motorboating and NFB
  112. Fender Bassman 6G6A Intermittent HT
  113. EVH 5150 iii Schematics
  114. AMPEG Echo Twin ET-2 Question
  115. Low voltage Orange
  116. Marshall Mode Four MF350 Problems
  117. behringer gm 108
  118. Weird voltages in T50
  119. simple, but i need HELP AMPEG 115 amp
  120. 69 Marshall Super Lead blowing fuses
  121. 96 Fender Twin (PR266) Reverb Static Problem
  122. Getting a Hickok tube tester going again.
  123. Extra tap on primary side of power transformer. What is it?
  124. EVH 5150 III (5153) clipping with Wah
  125. Behringer BX600 optocoupler?
  126. WAY high plate voltage in Fender clone
  127. BZZZZZZZT!!!! Suprise!
  128. Early Marshall 1987/Tremolo Standby Snubber Caps....?
  129. Silvertone 1482
  130. Never assume
  131. Bugera 6262 mod.
  132. 80s Fender Concert
  133. Marshall VS102R hum
  134. Fender Twin Amp - need help
  135. Dead Fender Stage 185-replacing thermisto
  136. 69 Laney socket arcing over
  137. australian transformer help
  138. Silverface Combo To Head Conversions
  139. 6V6 tube pin #1 stuck in tube socket...help.
  140. Ampeg BA115 busted?
  141. Stinky Hot Rod Deluxe
  142. Eden Metro 2 ohm load problem
  143. 1973 Fender Twin Reverb - Tinny Sharp sound
  144. Crate Blue Voodoo B60 abnormal signal distortion problem
  145. Fender Twin Amp Tremolo not working
  146. bandmaster rectifier diode type?
  147. Too Much Gain with ax84 amps build
  148. "Manufacturer bypassed" fuses - WTF?
  149. AVT-150 mute circuit
  150. PV 260c driver sub
  151. Randall RG100ESXP sparks and LEDs don't work
  152. Vox V125 Centre Tapped Pots
  153. Suggestions for Boogie Trem-O-Verb Problem?
  154. Possible dumb question alert:: OT Primary/Secondary impedance ?
  155. Crate head gx2200h channel problems
  156. Simulated Tube Rectifier
  157. Marshall Repair Newbie
  158. Silvertone 1474: Sounds like DC on a pot but...
  159. Marshall PROBLEMO!
  160. 1973 bassman 50 problem
  161. JCM900 Volume Fades
  162. Question about capacitor values and voltages....?
  163. Supro/Wards Airline GIM-9131A Tremolo
  164. Champ preamp tube oscillates
  165. Crate Volume Control Problem
  166. Bugera 333xl 212 combo problem
  167. Another Marshall Hum Problem - help!
  168. Heathkit
  169. question Polytone Mini Brute III / IV / M-PA
  170. Peavey TubeFex Pre Amp Error Codes???
  171. Help repairing Ampeg 1540 Crossover
  172. Hum - Marshall Valvestate VS265R
  173. 1975 Fender Twin 2nd channel distorting - Help!
  174. Hum in a Marshall
  175. Ampeg SVT 4 Pro power issue
  176. Crate Blue Voodoo 6212 Low Output
  177. Can Cap replacements for Traynor YGL-3
  178. Marshall AVT-50 volume drop-out
  179. Bugera 333xl-212 Issue AGAIN
  180. Vox Cambridge 30 Reverb Twin keeps blowing TDA2050
  181. Need 5B3 Deluxe OT recommendations
  182. Fender Studio Lead spares
  183. Ceramic cap voltage ratings.
  184. Behringer 880S Left Main Cuts out
  185. My 65 Reissue Princeton has no power.
  186. fender sidekick reverb 30
  187. Marshal VS100 transformer problem? (audio sample included)
  188. Peavey Max 115 - No Output HELP!
  189. peavey encore circa 1984
  190. send back to mesa?
  191. Bugera 333xl-212 Issue
  192. High B+ with Mojo 761 EX
  193. part values
  194. QSC service bulletins
  195. RI Marshall Super Lead 100 with bias issue
  196. Peavey Delta Blues - Cap job and the PCB
  197. Ampeg B-15 Trouble
  198. Shared cathodes but not plates
  199. 5150 problem
  200. Source for SS schematics (Marshall AVT50)
  201. Peavey Bandit 65 - Problem in volume knob
  202. New 7868 vs. NOS or Used?
  203. Bandmaster PT and OT part numbers
  204. finding/replacing filter capacitors....
  205. Peavey VTM 120-- please help
  206. FireFly Tube Amp Oscillation
  207. Electrovoice 81PMX Powered Mixing Board
  208. Blown trace on PCB
  209. Ampeg V4 distorting when increasing volume
  210. Princeton Reverb II switching
  211. 5E3 Deluxe Problems
  212. Valve Junior V3 Head input mod gone wrong...
  213. trouble shoot traynor yrm-1 reverb master
  214. Bugera 333Xl 212 Huge Problem
  215. Warning about amps with switching power supplies
  216. Fender Sidekick Reverb 15 repair - also, schematic?
  217. Just a compliment to you
  218. Ampeg V4 cap job using non-original value multi-caps...
  219. Airline 62-9015A
  220. Got a Bias Meter, now what!? Calling all experts...
  221. Marshall MG100HDFX Volume Drop
  222. Dead Line 6 Spider II HD
  223. Peavey Special 112 problem in effects loop
  224. Polytone Mini Brute
  225. Fender Hot Rod Deluxe: Sound comes and goes intermittently
  226. 36 watt (marshall 18 modified) neg. feedback
  227. Peavey Classic 100 help
  228. Hummmmmmmmm.....
  229. Marshall DSL201 with low volume
  230. Ampeg transformer question.
  231. PV Mark IV 16ch head scratcher
  232. Sovtek Mig-60 trouble
  233. Blues Deluxe part numbers
  234. FX loop issues
  235. Peavey classic 50/50 amp head
  236. Finally got a Compu Bias... need help interpreting data for Fender Princeton
  237. Grid Wires??
  238. Blues Junior Hum Problem
  239. Ampeg Rocket bias problem
  240. 2001 Fender Super Reverb
  241. wanted- low voltage (600vct or less) tremolux PT
  242. Fender Super Farting?
  243. Gibson GA40 RVT Cutting Out
  244. Legion Sound LSP-8 - any info on schemos?
  245. Fender M-80 Chorus
  246. 5e3 runaway
  247. Fender Twin transformer runs hot?
  248. Peavey Impuls disassembly?
  249. power cap polarity
  250. Acoustic 370 oscillation in power stage