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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Ampeg SVT-3 Pro -- Smoking Toroidal
  2. Goofy Gibson Amp
  3. Guitar Research T60R Zener Diode values
  4. M-80 fade out
  5. Speaker cabinet impedance question
  6. Curious thing on bottom of Ampeg VT-22 cabinet...
  7. Problem with 2003 Marshall JCM 2000 TSL100
  8. Hartke 3500 BJT
  9. AD15 no sound
  10. Marshall 5002 Lead 20 Gut Pic !! - Tech Advice -
  11. Vox Royal Guardsman 1131 problem
  12. blues deluxe reissue problem
  13. AVT-150 repair thread
  14. Older Epiphone amp
  15. Trying to find VOX part
  16. Ampeg BA-115 Crackle/static
  17. MG30dfx headphone jack
  18. 71' Marshall super lead, Replace capacitors?
  19. Peavey Heritage VTX
  20. Problem with my Fender Hot Rod Deluxe
  21. dying amp
  22. Peavey Data Bass
  23. DSL 50 no sound...help
  24. Yamaha EMX660
  25. Help!! Bad Speakers Killed My Amp?
  26. '71 Fender Deluxe reverb Vibrato question
  27. Balanced triodes in PI of Peavey VK's, is it of any use?
  28. Help w Volcano hot EL34 on Music Man 210HD 130
  29. JCM2000 DSL 50 low volume
  30. '71 Fender Deluxe reverb question.
  31. Kitty Hawk preamp repair driving me nuts!!!
  32. Speaker Cab Impedance Question
  33. bug dissected
  34. DSL Hum on Lead Channel
  35. Help: External speaker jack on drri, dead
  36. Gorilla amps: Info on a 10-watter
  37. troubleshooting an Ampeg VH-140C
  38. Deep fried Mc Gretsch! model 7885
  39. Troubleshooting tremolo on a Twin Reverb
  40. Old Fender Blues Deluxe
  41. Got a jvm410 H in and it makes an awful hum on od1 and od2 channels
  42. SFdeluxe with no tremolo
  43. Calculation for heater current
  44. tsl122 pc board
  45. Microphonic tube vs. fillament rattle
  46. Marshall footswitch
  47. GK800RB & Phantom power
  48. Hartke 3500A fault
  49. Ampeg VT-60 bias issue
  50. TSL Clean Channel Buzz
  51. Marshall 1987S Hiss/Hum Problems
  52. "Dorothy, the Evil Twin Is Dead!"
  53. Fender FM 65
  54. Peavey Classic 50 help
  55. Ampeg SVT 4 Pro Board Layout diagram
  56. B-52 At-100 Transformer
  57. Hafler P225 amp has goofy problem
  58. SWR W/M15 Combo hot component
  59. newtronics signal generator
  60. The heater cable toasted
  61. Powered speaker schematic needed
  62. Blues Junior ribbon wiring change
  63. No sound from Marshall MG50dfx
  64. Trouble with my Peavey Classic 30...suggestions?
  65. Sovtek blowing fuses
  66. Marshall Footswitch Conversion Possible?
  67. Marshall MG100hdfx Problem
  68. My VJR Voxy build didn't work, help?
  69. Stupid mistake on my Ampeg B-25
  70. BF Princton Reverb PT Question
  71. Mesa boogie mk iv gone silent!!
  72. crackling sound on my SF super reverb
  73. Silvertone OT
  74. Marshall problem
  75. Fender Acoustasonic Junior - What is wrong with my spring reverb?
  76. Dynacord Eminent I
  77. Another B-25 Question
  78. Benchtop smoke absorber?
  79. Good place to buy parts?
  80. Tektronix 475 Oscilloscope
  81. MARSHALL AVT 150H sometimes works
  82. Grundig tone circuit
  83. 7027A's
  84. Hartke 3500 MOSFET output transistor
  85. Fender FM 212r low level hum
  86. new motherboard for dsl still not working
  87. Tubes warm but not hot?
  88. Mesa M-Pulse 600 BIAS
  89. Ampeg B-25
  90. SWR Workingman's 15 - weird crackle
  91. Ampeg SVT 3 PRO crackling and popping
  92. SOLDANO designed amp/Yamaha
  93. Fender Deville with slight oscillation/flange sound
  94. fender concert 81, clean gets dirty after on awhile
  95. Yamaha T100C
  96. crate rfx120 hum
  97. Bugera 22V?
  98. Power transformer voltage question
  99. Heater wire miswiring fast diagnosis
  100. JCM 800 2203 weird problem
  101. Fender Stage Lead II 2-12
  102. Fender convenience outlets miswired
  103. Peavey Classic 50/50 - Eating Valves (very bright red!)
  104. Kustom Kasino head preamp board
  105. Marshall MG100HDFX. super help needed.
  106. Marshall Tsl 100h Problem
  107. Isolation transformer / amp potiential
  108. Fender Stage 100 DSp Intermittent Output
  109. Peavey Special 130 hum
  110. Reverb Noise
  111. Stiletto channel switching pop
  112. Blues Deluxe weird hum
  113. silicone glue and sound
  114. new speaker whistle
  115. fender twin pro tube
  116. Speaker Reconing Kit
  117. Marshall AVT 100
  118. Dano/Silvertone mystery
  119. Replace Death Cap with Safety Cap?
  120. Bassman AB165 huge hum
  121. "Pop" when switching NFB
  122. JCM 2000 TSL 602 What to replace first????
  123. Chassis Corrosion
  124. Mesa Lonestar hum(generally about hum)
  125. TRex 18watt, gating/farting/blocking?
  126. Behringer pmp3000 will not sound through both mains
  127. SWR Workingman's - distorted
  128. Mesa 2:90 Pop when going to standby
  129. 1963 Reverberocket distortion
  130. Peavey TKO 80 Schematic
  131. Amp turn-off squeak
  132. Distortion/farting in fender frontman 25r
  133. jcm 900 no sound blown OPV fuses
  134. DSL 50 Tube Board rework
  135. Sunn Beta Lead Guitar Head major issues...
  136. Peavey KB100 KB 100 Distorted Output
  137. Peavey Power Board
  138. No Cathode Current / No Sound
  139. Champ 600 debug help
  140. Hotrod Deville preamp problems...
  141. Ampeg vt40 El34 conversion output/headroom
  142. Marmac XL120 Head Repair
  143. Triple XXX head pops, cracks, and hums. HELP
  144. toroid primary gone!
  145. bypass cap values
  146. My Hot Rod Deville (4x10) has picky reverb...
  147. Fender Repair guys
  148. Marshall 2204 - new pots - doesn't work now
  149. Fender Super Six Baby... w/problems :(
  150. Adjusting bias on BDRI (missing TP?)
  151. Hod Rod Deluxe Problems - Please Help
  152. deluxe reverb - can't get plate voltage down
  153. Missing gain in Princeton Reverb
  154. Please help me identify fuses by their ID and look
  155. Roland Cub 60 pwr xfmr replacement
  156. jvm410h volume control on od1 and od2 issues
  157. single ended tube amp help
  158. Replacing caps in Magnatone
  159. polytone brute bass amp back again....
  160. Line 6 AX2 Power Transformer Hookup
  161. Pp el 34 ht waaay too high!
  162. repair question: Tremolo Silvertone 1484
  163. Fender Twin Amp tremolo lives again
  164. Cooked power tranny? (Vibrolux Reverb)
  165. 36 coupe filament problem
  166. Crate GX-120 problem
  167. Marshall JCM-800 "clipping diodes"
  168. Making a footswitch for MG15MS15ZW
  169. too high filament voltage and weird scope reading
  170. JCM 2OOO tsl 602 "won't switch channels"
  171. CE1000 CE2000 int audio
  172. 63 Deluxe questions
  173. Marshall Troubles
  174. Hartke 3500 Mosfet - Powering on, but not much more
  175. Peavey Delta Blues - Blown Fuse (2x now)
  176. Bugera 333xl-212 sound fluctuations
  177. Reverberocket R212R problem
  178. Peavey Classic 50 with Reverb problem
  179. Peavey KB100 Horn Source?
  180. Behringer BX1200 - no sound :(
  181. When a Death Cap Commits Suicide...
  182. Fender Dual Showman Reverb amp. Noisey
  183. Hotrod Deville 2X12 volume increases for a few seconds
  184. Seymour Duncan Convertible with popping noise
  185. JCM2000 - How hot is Too Hot???
  186. Multi-section caps last longer?
  187. Weird "Ground Potential" Experience
  188. older mosfet Trace Elliott unreliability
  189. Identify a modern Cap
  190. Extremely low bias reading, blown fuse/tube in a Valveking after bias pot install
  191. Help with SF Fender Twin tremolo (ultra linear model)
  192. Help with Sunn 200S
  193. SWR Workingman's 10 -- plays for 20s, then dies
  194. amp teck help requested
  195. 5E3 volume noise
  196. Solution to dealing with loose notes
  197. Wax Spilled in Amp - Removal Ideas?
  198. Hot Rod Deluxe channel switch problem
  199. Hot Rod Deluxe channel switch problem
  200. Anybody have a pic of a Fender Concert IIs input jack wiring?
  201. Vibrolux B+ drops by HALF at practice space
  202. silly question about standby switch
  203. New power tranny: rectifier and power lamp blow (Silvertone 1482)
  204. Fender BF Twin Rev Tremolo
  205. Markley CD-120/JMF Spectra Channel Switching
  206. Bizarre 5150 volume problem
  207. Magnatone 280 B built, vibrato questions
  208. Peavey Tour 450
  209. Boss Me-8b and Boss GT-6B Repair Help
  210. Help with a Line 6 Flextone
  211. First post! need help getting a PT back running!
  212. Hum in Triode mode
  213. Eden WT-300
  214. Single Rectifier without power tubes
  215. Peavy Classic Deuce 2 Guitar AMP on switch
  216. Crate VC2010 problem
  217. Fender M80 Chorus Help!!
  218. Crate hybrid
  219. dsl 100 motherboard good in 2007 model?
  220. rectifier???????????????caps????????jtm 60
  221. dsl 50 schematic for 100? work?
  222. Peavey studio pro 112 (redline version)
  223. Fender G DEC Jr Transformer
  224. bugera 333xl no sound
  225. BF Bandmaster Vibrato 'motorboating'(?)
  226. marshall dsl 100 bias running loose 2007 model
  227. acoustic 370 EQ questions
  228. Need black/white pointer knobs for Champ 25.
  229. Gibson GA19RVT Tremolo problem
  230. Fender Frontman 15G aux problem
  231. Crate VC120 no power
  232. Randall RG200 Valve dynamic burning heater resistors
  233. Fender Pro Tube Twin Low Output
  234. PS Filter Capacitors
  235. full schematic SWR workingsman
  236. Marshall MGDFX100 & 30DFX please help
  237. Marshall AVT150 Blowing fuse
  238. BF Fender Bandmaster problem
  239. Ampeg V4B-AV
  240. 60's Ampeg Reverberocket II no clean headroom
  241. Marshall avt50 unstable
  242. Help with a Tweed Champ first build?
  243. Problem With Mesa Studio Preamp
  244. Marshall 4140 Faceplate
  245. swr 550x input jacks
  246. Enzo, I fixed the Acoustic 270, but why?
  247. Yamaha EMX660
  248. problems with 5150 combo
  249. Marshall DSL 100 No Reverb
  250. Blues Deluxe strange hum problem