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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Sovtek blowing fuses
  2. Marshall Footswitch Conversion Possible?
  3. Marshall MG100hdfx Problem
  4. My VJR Voxy build didn't work, help?
  5. Stupid mistake on my Ampeg B-25
  6. BF Princton Reverb PT Question
  7. Mesa boogie mk iv gone silent!!
  8. crackling sound on my SF super reverb
  9. Silvertone OT
  10. Marshall problem
  11. Fender Acoustasonic Junior - What is wrong with my spring reverb?
  12. Dynacord Eminent I
  13. Another B-25 Question
  14. Benchtop smoke absorber?
  15. Good place to buy parts?
  16. Tektronix 475 Oscilloscope
  17. MARSHALL AVT 150H sometimes works
  18. Grundig tone circuit
  19. 7027A's
  20. Hartke 3500 MOSFET output transistor
  21. Fender FM 212r low level hum
  22. new motherboard for dsl still not working
  23. Tubes warm but not hot?
  24. Mesa M-Pulse 600 BIAS
  25. Ampeg B-25
  26. SWR Workingman's 15 - weird crackle
  27. Ampeg SVT 3 PRO crackling and popping
  28. SOLDANO designed amp/Yamaha
  29. Fender Deville with slight oscillation/flange sound
  30. fender concert 81, clean gets dirty after on awhile
  31. Yamaha T100C
  32. crate rfx120 hum
  33. Bugera 22V?
  34. Power transformer voltage question
  35. Heater wire miswiring fast diagnosis
  36. JCM 800 2203 weird problem
  37. Fender Stage Lead II 2-12
  38. Fender convenience outlets miswired
  39. Peavey Classic 50/50 - Eating Valves (very bright red!)
  40. Kustom Kasino head preamp board
  41. Marshall MG100HDFX. super help needed.
  42. Marshall Tsl 100h Problem
  43. Isolation transformer / amp potiential
  44. Fender Stage 100 DSp Intermittent Output
  45. Peavey Special 130 hum
  46. Reverb Noise
  47. Stiletto channel switching pop
  48. Blues Deluxe weird hum
  49. silicone glue and sound
  50. new speaker whistle
  51. fender twin pro tube
  52. Speaker Reconing Kit
  53. Marshall AVT 100
  54. Dano/Silvertone mystery
  55. Replace Death Cap with Safety Cap?
  56. Bassman AB165 huge hum
  57. "Pop" when switching NFB
  58. JCM 2000 TSL 602 What to replace first????
  59. Chassis Corrosion
  60. Mesa Lonestar hum(generally about hum)
  61. TRex 18watt, gating/farting/blocking?
  62. Behringer pmp3000 will not sound through both mains
  63. SWR Workingman's - distorted
  64. Mesa 2:90 Pop when going to standby
  65. 1963 Reverberocket distortion
  66. Peavey TKO 80 Schematic
  67. Amp turn-off squeak
  68. Distortion/farting in fender frontman 25r
  69. jcm 900 no sound blown OPV fuses
  70. DSL 50 Tube Board rework
  71. Sunn Beta Lead Guitar Head major issues...
  72. Peavey KB100 KB 100 Distorted Output
  73. Peavey Power Board
  74. No Cathode Current / No Sound
  75. Champ 600 debug help
  76. Hotrod Deville preamp problems...
  77. Ampeg vt40 El34 conversion output/headroom
  78. Marmac XL120 Head Repair
  79. Triple XXX head pops, cracks, and hums. HELP
  80. toroid primary gone!
  81. bypass cap values
  82. My Hot Rod Deville (4x10) has picky reverb...
  83. Fender Repair guys
  84. Marshall 2204 - new pots - doesn't work now
  85. Fender Super Six Baby... w/problems :(
  86. Adjusting bias on BDRI (missing TP?)
  87. Hod Rod Deluxe Problems - Please Help
  88. deluxe reverb - can't get plate voltage down
  89. Missing gain in Princeton Reverb
  90. Please help me identify fuses by their ID and look
  91. Roland Cub 60 pwr xfmr replacement
  92. jvm410h volume control on od1 and od2 issues
  93. single ended tube amp help
  94. Replacing caps in Magnatone
  95. polytone brute bass amp back again....
  96. Line 6 AX2 Power Transformer Hookup
  97. Pp el 34 ht waaay too high!
  98. repair question: Tremolo Silvertone 1484
  99. Fender Twin Amp tremolo lives again
  100. Cooked power tranny? (Vibrolux Reverb)
  101. 36 coupe filament problem
  102. Crate GX-120 problem
  103. Marshall JCM-800 "clipping diodes"
  104. Making a footswitch for MG15MS15ZW
  105. too high filament voltage and weird scope reading
  106. JCM 2OOO tsl 602 "won't switch channels"
  107. CE1000 CE2000 int audio
  108. 63 Deluxe questions
  109. Marshall Troubles
  110. Hartke 3500 Mosfet - Powering on, but not much more
  111. Peavey Delta Blues - Blown Fuse (2x now)
  112. Bugera 333xl-212 sound fluctuations
  113. Reverberocket R212R problem
  114. Peavey Classic 50 with Reverb problem
  115. Peavey KB100 Horn Source?
  116. Behringer BX1200 - no sound :(
  117. When a Death Cap Commits Suicide...
  118. Fender Dual Showman Reverb amp. Noisey
  119. Hotrod Deville 2X12 volume increases for a few seconds
  120. Seymour Duncan Convertible with popping noise
  121. JCM2000 - How hot is Too Hot???
  122. Multi-section caps last longer?
  123. Weird "Ground Potential" Experience
  124. older mosfet Trace Elliott unreliability
  125. Identify a modern Cap
  126. Extremely low bias reading, blown fuse/tube in a Valveking after bias pot install
  127. Help with SF Fender Twin tremolo (ultra linear model)
  128. Help with Sunn 200S
  129. SWR Workingman's 10 -- plays for 20s, then dies
  130. amp teck help requested
  131. 5E3 volume noise
  132. Solution to dealing with loose notes
  133. Wax Spilled in Amp - Removal Ideas?
  134. Hot Rod Deluxe channel switch problem
  135. Hot Rod Deluxe channel switch problem
  136. Anybody have a pic of a Fender Concert IIs input jack wiring?
  137. Vibrolux B+ drops by HALF at practice space
  138. silly question about standby switch
  139. New power tranny: rectifier and power lamp blow (Silvertone 1482)
  140. Fender BF Twin Rev Tremolo
  141. Markley CD-120/JMF Spectra Channel Switching
  142. Bizarre 5150 volume problem
  143. Magnatone 280 B built, vibrato questions
  144. Peavey Tour 450
  145. Boss Me-8b and Boss GT-6B Repair Help
  146. Help with a Line 6 Flextone
  147. First post! need help getting a PT back running!
  148. Hum in Triode mode
  149. Eden WT-300
  150. Single Rectifier without power tubes
  151. Peavy Classic Deuce 2 Guitar AMP on switch
  152. Crate VC2010 problem
  153. Fender M80 Chorus Help!!
  154. Crate hybrid
  155. dsl 100 motherboard good in 2007 model?
  156. rectifier???????????????caps????????jtm 60
  157. dsl 50 schematic for 100? work?
  158. Peavey studio pro 112 (redline version)
  159. Fender G DEC Jr Transformer
  160. bugera 333xl no sound
  161. BF Bandmaster Vibrato 'motorboating'(?)
  162. marshall dsl 100 bias running loose 2007 model
  163. acoustic 370 EQ questions
  164. Need black/white pointer knobs for Champ 25.
  165. Gibson GA19RVT Tremolo problem
  166. Fender Frontman 15G aux problem
  167. Crate VC120 no power
  168. Randall RG200 Valve dynamic burning heater resistors
  169. Fender Pro Tube Twin Low Output
  170. PS Filter Capacitors
  171. full schematic SWR workingsman
  172. Marshall MGDFX100 & 30DFX please help
  173. Marshall AVT150 Blowing fuse
  174. BF Fender Bandmaster problem
  175. Ampeg V4B-AV
  176. 60's Ampeg Reverberocket II no clean headroom
  177. Marshall avt50 unstable
  178. Help with a Tweed Champ first build?
  179. Problem With Mesa Studio Preamp
  180. Marshall 4140 Faceplate
  181. swr 550x input jacks
  182. Enzo, I fixed the Acoustic 270, but why?
  183. Yamaha EMX660
  184. problems with 5150 combo
  185. Marshall DSL 100 No Reverb
  186. Blues Deluxe strange hum problem
  187. Noisy Peavey EVH 150
  188. Hiwatt DR-103 Clone PI Issues
  189. Stone SGT60 drawing way too much current(blowing fuses)
  190. Acoustic Model 109 (G60-112) help
  191. Fender 30 ticking
  192. Fender Twin Amp Jumping Channels
  193. Mesa DC-5
  194. Verb tanks
  195. Marshall TSL122 Re-Cap
  196. Fender Showman Help- LOUD Hum
  197. Gibson GA 30 RV Loudness issue...
  198. Carvin XV-212C help
  199. Concert Bias
  200. AVT 150H Replacement Parts
  201. H&K Switchblade schematics?
  202. Fender Deluxe 85 Volume Issue?
  203. Transformer testing
  204. el84 Bias 9V at grid enough?
  205. SWR 350 hum problem
  206. B2Re Ampeg don't let me play
  207. DRRI 6V6s red plating
  208. Blues Junior Power Up Crackle
  209. Bugera 333XL popping noise
  210. Hot Rod deluxe motorboating in drive channel
  211. Peavey 6505 bias and grounding issue
  212. OT? vibrochamp..newb help please?
  213. Fender Twin Amp - Gain channel sucks, clean channel has limited Bass
  214. Sunn Model T rectifier diodes
  215. Ashdown 500 EVO blowing fs3 fuse
  216. gallien krueger MB150S
  217. Behringer BXL 1800A finally working
  218. Speaker coil for dummy load?
  219. Odd microphonic problem
  220. Marshall TSL100
  221. Dumble clone transformers
  222. 5Y3 Red Plate Special
  223. New Fluke Multimeter recommendation?
  224. Capacitor codes?
  225. torque t100 ga
  226. VHT amp problem
  227. Ampeg VT-40, has no sound...
  228. power/standby in one switch?
  229. Bogner XTC FX loop volume and tone drop
  230. Hartke HA3500/VX3500 combo troubleshoot.
  231. Fender 65 DRRI "squelching" noises . .
  232. 67 Vibrolux Reverb - Distortion/no signal???
  233. delete
  234. Line 6 Flextone help
  235. trace elliot 715x dead
  236. Marshall Valvestate 8280 Problems
  237. # 0990775 fender output transformer ??
  238. Vibrolux Reverb volume at zero
  239. Fender Bandmaster/Showman mod reversal
  240. Acoustic 470 PA
  241. Fender Stage 160 Instantly Blowing Fuses
  242. Help need jtm60 amp guru>>>>>>>>>>>>>
  243. Fender Princeton Reverb II troubleshoot
  244. Marshall MG50DFX
  245. HIWATT Amp Problem
  246. Blues Deville 4x10, flooded, no reverb
  247. SWR Workingmans 15" humming
  248. ampeg VL 1002
  249. Peavey GPS 900 pwr amp
  250. epiphone special