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View Full Version : Maintenance, Troubleshooting & Repair



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  1. master reverb 30 starting to choke
  2. Mesa F-50 noise on clean channel
  3. Marshall JCM 2000 repair issues
  4. Fender lamps
  5. Deluxe reverb reissue doesn't like loud
  6. Vox AC30TB gain problem
  7. Chassis Clips
  8. Peavey 5150 combo amp fuse?
  9. Marshall JCM: Loud hum goes away when I touch the chassis
  10. Ampeg SVT-6 Pro Random Noises
  11. Behringer BXL 1800A
  12. General capacitor value (swapping) and function question
  13. Gibson G-10 (solid state) Output Stage Problem
  14. Help: Fender Pro Junior Undertones?
  15. Marshall dsl 201 combo
  16. Fender 75 Tube order?
  17. ampeg SVT noise issue
  18. standby switch
  19. Holden Slave mods
  20. Peavey VYPYR 15
  21. Fender Hot Rod Deville: clean channel switching problem
  22. How to get started with an oscilloscope?
  23. Marshall TSL 100 Issue
  24. Ampeg v4 trouble that needs to be shot
  25. crate bl120 crashes
  26. No sound from Vintage Deluxe Reverb
  27. Is a 6G6-A Bassman quiet for it's power?
  28. JCM2000 DSL pcb pots?
  29. crate v33h channel switching pop noise
  30. Ashdown mag 300 combo amp, quit on me.
  31. Ampeg B15S humming
  32. valve brands for fender amps?
  33. power loss in '66 blackface princeton n/r
  34. Tube burning station
  35. Fender Pro 185 Footswitch / Reverb Problem
  36. Cracking noise Classic 30/advice on replacement
  37. Help in removing master volume from silverface Twin
  38. Is ther an easy way to diagnose screen grid resistors?
  39. Op Amp tester
  40. SWR schem?
  41. Roland JC-60 input jack mystery - HELP!?
  42. Fuchs Amp Sizzles, Ground Noise
  43. JCM 2000 Reverb
  44. Marshall AVT150 problems
  45. '65 Twin Reverb R-Issue B+ noise problem
  46. Mesa Mark iii
  47. GK knobs WTF??
  48. ADA MicroTube 200 smoking issues
  49. Music man circuit breaker
  50. Dart amp
  51. Redplating on one tube
  52. Koch Twintone
  53. High-Pitched Squealing at High Volumes
  54. Ampeg SVP-1500 Protecting
  55. Super Reverb (no reverb)
  56. Ampeg B12XT Motorboating on Intensity
  57. Blown part in Fender Blues Deluxe Reissue
  58. 1980 twin reverb trouble shoot
  59. This may be a stupid question, but..
  60. need some help please!
  61. Peavey C30: moan from the speaker
  62. Fender PS 160 Vocal Amp Trany problems???
  63. New to forum.. please help
  64. soldering iron question.
  65. switch-on transient in solid-state amp
  66. JCM 800 poweramp not fully functioning
  67. Any large retailers still sell fuses???
  68. 1975 Twin Reverb - Which tubes?
  69. Vox Valvetronix - How the F*** do I get this thing apart?
  70. Peavey Deuce: Power Supply Board Component
  71. Crown CE2000....anyone actually repairing this junk?
  72. Acoustic 370 Repair - Atlanta, GA area
  73. Silvertone 1485 dual OT?
  74. watkins tremelo amp (1960)
  75. Fender FM65 DSP lockup
  76. Heater voltages too high?
  77. Ampeg SVT Classic goes into standby on its own
  78. magnatone 213 finished - vibrato doesn't work
  79. Sudden loud buzzing on Ashdown bass amp
  80. Marshall 8100 head hums!
  81. Old Symphonic 16-S Record Player Problems
  82. Bandmaster Reverb vibrato
  83. bandmaster reverb won't adjust
  84. Princeton 65: what to make of TP values
  85. Peavey C30 squeals
  86. M-80 popping buzzing
  87. Is This a Bias Trim Pot?
  88. Another AVT150 TDA7293 problem - please help
  89. Biasing Question: Marshall JCM602
  90. Fender Champion 600 On/off toggle switch
  91. Good book on solid-state troubleshooting and repair
  92. Bad Cat Panther with creeping bias
  93. No chorus effect on JC-120
  94. Engl Powerball
  95. Looking for a Ampeg VH-140C schematics
  96. Dynacord Eminent II
  97. Behringer PMX2000 Fried!
  98. Peavey 5150II Tube Question
  99. Holden Wasp 4xKT88 power tube arcing.
  100. Mark VIII Bass Head
  101. filter cap failure - gradual or sudden?
  102. pcb input jack replacement
  103. Peavey Classic 20 transformer source
  104. High-pitch noise in old tube amp (oscillation?)
  105. JTM Blowing Main Fuse?
  106. Marshall MG100HDFX head broken input jack
  107. Disharmonic distortions
  108. Matching speaker Ohms and amp Ohms
  109. Vox AC15 RE keeps blowing fuses
  110. Fender princeton 112 plus blowing fuses??
  111. Lucky find- what's your best find?
  112. '66 Ampeg Reverbrocket Transformers
  113. Loud hum
  114. Vibro Champ filters self-discharging - why?
  115. Beheinger hum?
  116. Peavey m 2600 old style one channel out
  117. older Roland Cube 60 .....low hummmmmm
  118. Fender HRD channel switching
  119. MusicMan 130, questions.
  120. Mesa V-Twin problem
  121. ic confusion
  122. Help Biasing my Vox ac50 cph
  123. Marshall AVT150H Sound?
  124. My vox ac50 classic plus head wont go off standby.
  125. Help!! I connected a burned my Fender DeVille
  126. Transformers
  127. Heathkit IO-103 oscilloscope
  128. Current rating for heater wiring in power transformer
  129. Cyber Champ preamp dead
  130. B52 AT-100 Reverb Problem
  131. Shorted Power Transformer Primary - Help!
  132. guitar research help
  133. Help with Crate Vintage Club 50
  134. help with Vox amp
  135. Ampeg B4 R slow power up anyone see this before?
  136. Locating Noise
  137. Questions about Bassman70
  138. Transformers for (silverface) Bassman 70
  139. How do I eliminate 120 cycle hum/noise from my solid-state amplifier?
  140. Fuse blow out on Valveking 112 and Amp Won't turn on again
  141. Peavey TNT-no output, and I think it's my fault
  142. Marshall DSL 100 Low Gain Problem HELP!!!
  143. Mesa Boogie Nomad 45 - Reverb INOP
  144. Musicman 2275-130 - tremolo issues
  145. filament supply question
  146. another squealing champ
  147. Orange AD30- Channel Switch Problem
  148. behringer in speaker crossover limiter bulb
  149. JMP -1 12AX7 tube voltages.
  150. ReCap kit from Fliptops.net for my V4
  151. Crate GX1200 devices?
  152. Ampeg VL-503 Blowing Fuses
  153. Help on my jcm 800 mods
  154. Alto power amps
  155. DC Pre-Amp Tube Filaments on vintage Fender - pros and cons?
  156. SWR Baby Blue 2
  157. Question for Enzo on Fender Frontman 25R
  158. Peavey duel 212 and rectoverb problem
  159. Kustom pcb
  160. Fender Supersonic Output Tube Substitution
  161. Peavey Firebass 700
  162. Help with Harmony 303a
  163. amp buzz
  164. Peavey XXX needs a love tap 2 work
  165. Reverb Tank for a Epiphone Blues Custom
  166. Help troubleshooting fender princeton
  167. Princeton Reverb - the immortal hum
  168. Short in amp: house circuit breaker pops, amp fuse does not.
  169. valvestate 8080 blows fuse
  170. Musicman trouble shooting has caused hum, and only hum.
  171. Jcm2000 dsl100
  172. Identify Ampeg PT Leads?
  173. Marshall MG250DFX - Smoke Generator!
  174. switchcraft beauty nuts
  175. There's a baby with a harmonica inside my amp.
  176. Crate GX-65 Transformer popped
  177. mesa boogie toggle switch replacements
  178. 1972 Twin Reverb-Flashing grids/tubes when played with a guitar!
  179. vox ac30 tb 1965 problems
  180. Amp makes high picth sound but not feedback
  181. JC-120 from bad to worse
  182. Sovtek transformer specs
  183. powering rectifier w/6v tap
  184. capstan sandblaster
  185. 50 watt fender OPT reflected Z
  186. Tubes losing power
  187. Silvertone 1484 stray note
  188. "DI YA" Potentiometers
  189. marshall jcm 2000 dsl 50 problem
  190. M80 BASS combo, anybody want to help a dufus??
  191. power transformer problem??? maybe
  192. volume problems
  193. Identify this cap?
  194. Pot for Ampeg Reverberocket 2
  195. Really hot grid resistors!??
  196. Anybody ever fixed a Fender XFL1000 Power Amp?
  197. Problems with AC30 tbx standby/rectifier/fuses
  198. Hum disappears with dummy plug... but what does it mean?!
  199. Classic 30 help
  200. Peavey TNT 150 bass amp has no high gain
  201. marshall head trouble
  202. Pv 5150
  203. Danger of helping Single Post members
  204. low volume output
  205. Gibson ES 150 volume issue
  206. blown bass amp
  207. Marshall DSL401 clean channel cutting out
  208. Smoking resistors in a guitar SS amp
  209. SWR Workingman's 15 Schematic
  210. Ampeg Reverberocket: intermittent noise problem?
  211. Amps with different input voltage rating questions
  212. Fender SS amp no sound
  213. GT Studio Guitar Preamp Help
  214. Marshall avt 100 - no fx
  215. Circiit board repair
  216. Peavey Classic 30 - Tube failure?
  217. obtaining the LM4701T power amplifier ic
  218. Peavey Studio Chorus 210: one channel not working, possible chorus prolblem
  219. Old Standel SI15b outputs
  220. 900 slx trouble
  221. will big ass filter caps newter my tone?
  222. what to check when pwr tube blows?
  223. Spetra 315
  224. Soldering gun, or big-ass iron?
  225. Bogner Ecstasy Squealing
  226. Can someone post me a pic of a Vibrolux power board
  227. How powerful of a soldering iron do I need..
  228. Multimeter Advice......
  229. Cab Speaker Wiring........
  230. Lead free solder rework
  231. deluxe reverb reissue fading out
  232. changing rheostats
  233. Marshall AS-100D plugged to 220V instead 110
  234. PDF Document warning
  235. Deluxe reverb reissue help
  236. fender bandmaster idenification and tremolo problems
  237. JCM 2000 DSL 100 Bias problem
  238. Line 6 Spider III 30 amp....how the heck do you remove the amp from the cab?
  239. very old amp w/non PM speaker. Customer wants PM speaker installed.
  240. GA-20 low power
  241. Trace Elliot Velocette Redplate
  242. Marshall jcm 2000 DSL sound cuts out!
  243. Princeton
  244. Ampeg BA115 blown out from loud playing?
  245. Recapping Ampeg B-15S
  246. TL604
  247. Peavey Studio Chorus 210
  248. Marshall 30dfx very little sound
  249. New ac cord for 100w Twin
  250. Mesa Rectifier Problem