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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Swr 400
  2. Fender 125A32A OT?
  3. Marshall TSL 122 biasing
  4. Bugera 333xl-212 big problem
  5. Carvin Mixer Board "Component I have not seen before"
  6. Amp Shocks Me
  7. What Happened?
  8. The Twin PT- again?
  9. Amp hiss/drone
  10. Looking for a Twin Reverb II faceplate
  11. Marshall VS100 Head...DEAD!?
  12. Behringer PMH3000 power supply
  13. fender faint sound
  14. need help with marshall as100d
  15. Marshall 1959 head - OT vs. EL-34's
  16. Recommendations for Test Equipment Wanted
  17. Volume dial not working on Chmpion 30 DSP
  18. Changed tape in RE-301 and now lacks intensity and output.
  19. unwanted distortion and crackle in laney bass amp
  20. Bassman 70 - both channels hum
  21. How do i set my ohms for a 5150/marshall 1960 lead cab
  22. Reverb tank feedback: could this pig stop squealing???
  23. Identifying different PT primaries
  24. 5150 help
  25. Vibro Champ rising DC leakage problem
  26. Early JC-120: chorus works, controls don't - help?
  27. Problem with my PEAVEY 5150 Help!!!
  28. a question about capacitor size?
  29. Electrolytic Recapping - Low ESR?
  30. Tweed Harvard conversion
  31. Fender Pro Reverb 69 - phase inverter problem
  32. Snap Crackle Pop in my 5F2A
  33. Roland BC-30 low output.... any ideas?
  34. Bad bias pot - Hot Rod Deluxe
  35. Triton pro - After touch strip
  36. Source for 6C10 Tubes? For Ampeg Jet
  37. fender ultra chorus reverb don't work
  38. Jazz chorus output trannies dead
  39. Marshall MF350 question.
  40. "The Twin" is HOT!!!
  41. help troubleshooting fender ultimate chorus
  42. Is it "ghosting"?
  43. What EL34's for MusicMan?
  44. crossover help
  45. 1990's Ampeg Reverberocket 1X12 USA REVERB PROBLEM
  46. Stilletto info
  47. repair checklist
  48. :( HELP! distored cleans on low volumes w/TSL 60
  49. Clipping in the lead channel, need answers:(
  50. HD Deluxe 16volt reg solution
  51. crate volume flux's
  52. Hot Rod Deluxe Hum
  53. BBE B-Max input mod?
  54. Can a Tube Socket Be Repaired?
  55. Help with Peavey Hybrid/Ultraliner output
  56. Soldering Technique
  57. DSL JCM2000 - Phase Inverter Hum/Voltages
  58. Shobud Amp SB15 (Solid State) volume fluctuates
  59. MusicMan 65, transistor driver
  60. Marshall 5212 repair
  61. Peavey 5150 combo NEED HELP!
  62. Fender Evil Twin Red Knob help please
  63. Jcm2000 - hum
  64. Peavey Classic 30 using NOS Tubes
  65. Marshall dsl 50 problem!
  66. 7800/100V cap can for Acoustic 370
  67. Treble Control Dead...!!
  68. Marshall JCM800 (2205) 50w problem
  69. Rheem/Califone 1909R - Need Help!
  70. 5F1 Champ DIY: No sound (Tube/Transformer)
  71. Carvin output amp
  72. Marshall AVT150H trouble
  73. Hot Rod Deville Crackling leaving Standby Mode
  74. Fender silverface / blackface bias question
  75. Marshall jcm900 squeal at power off
  76. Interesting discovery on my V18 (they screwed up!)
  77. BUZ901P BUZ906P replacements
  78. how to fix my fender blues junior
  79. Crate TD70 fades out
  80. Deluxe Reverb RI - No current
  81. Costly rookie mistake?
  82. anything that can be done to sweeten up the reverb?
  83. Need advice on installing an 8 pin IC Socket
  84. peavey renown 400 reverb problem
  85. Weird rattle in Crate V-18
  86. Pv xrd680+
  87. blues Jr Problem
  88. blues deluxe is dying!
  89. 5150 evh power transformer
  90. Blues Junior's smoking.....literally
  91. Hot Rod Deluxe Reverb inop, What are these wires for?
  92. Line 6 exp pedal voltage range
  93. The Twin power trans?
  94. peavy 5150 combo
  95. Special 130 resistor value
  96. Blown output tranny?
  97. Cleaning Pinch Roller on a roland Space Echo?
  98. Marshall 6100 problems.
  99. Funny issue with a SF Fender twin...
  100. Kt66 considered for retube
  101. Geeked! Fixed my first tube amp!
  102. New Power Transformer Install Help JTM30
  103. faulty speaker?
  104. Vibrochamp tone stack problem
  105. bassman AA165 volume does not go to 0
  106. Question about biasing Fender 94 Twin...?
  107. Acoustic 125 with low output
  108. Channel switching - Blues Deluxe
  109. help with SS amp repair (Fender Stage 1600)
  110. My Ampeg BA115 won't stop blowing fuses!
  111. tsl 100 screen grid resistors
  112. 1975 Peavey Deuce question.
  113. Speaker Terminal - broken
  114. Tube burn up
  115. 5150II Not playing once warmed up?
  116. Apology to: GTR TECH and JAG.
  117. mesa triple rectifier
  118. Twin Reverb 65 RI - Reverb Hum
  119. fender quad reverb blown, repair help.
  120. HV on speaker
  121. Fender Stage 112SE - DEAD
  122. Troubleshooting for dummies...
  123. Bogner Shiva: Channel 2 Bass help
  124. Marshall Valvestate 8004 - Blowing TDA1514A's
  125. Need some help troubleshooting an Ashdown FA-60
  126. Bias -V pin 5 jtm60
  127. Marshall JCM 900 New Tubes
  128. jcm 200 dsl 100 head blowing H.T. fuse with the effects loop.?
  129. Unsteady Bias on 5F6A
  130. GK1001rb - Help!
  131. Fender Twin Po Tube = 100 watt boat whistle
  132. Bad power tube or oscillation?
  133. Speaker Recone?
  134. Bias Question - Rookie Needs Guidance
  135. 65 Fender Twin Reissue - No Reverb
  136. Seek OT-215 Substitute
  137. Testing caps?
  138. Transformer shunt bias adjustment
  139. 5150 vs. 380V
  140. Gibson Duo-Medalist - too much treble, not enough volume!
  141. JCM 2000 DSL 100w help - audio problems, burning smell
  142. Floor vs. Wall Mounted Reverb Pans???
  143. Roland Studio 6V troubleshooting question
  144. Finding the source (hissing problem)
  145. favorite wire stripper for small guage wire?
  146. Transistor search. 2sk184gr & 2sk363gr
  147. Looking for Dome Knobs with Dot Pointer
  148. Noise from logo light
  149. Firefly - First build problems
  150. Super Reverb RI resonance/microphonics? Weird.
  151. Pv 2000
  152. problem with filament rectified supply
  153. Hum - PT inducing this into the OT?
  154. 70's Ampeg SVT crackling, popping, fan problem
  155. Question about Mesa MkIIB schematic....
  156. When to change tubes on mesa boogies?
  157. loud popping volume.
  158. Microphonics driving me nuts!
  159. JCM800 Burning Tubes - HELP!!!
  160. Pedal problems
  161. Funky axial electrolytics
  162. Need info on Crate PA-B8350
  163. Ampeg VT-22 question
  164. My peavey bandit works rather weird
  165. HR DeVille 112 noise
  166. ? about LM3080N used in a peavey amp
  167. Bogen CHB 35A Always a bit Distorted
  168. 70's Ampeg SVT repair help needed
  169. fender tube
  170. To crimp or NOT crimp
  171. BF Super Twin Reverb - Burnt resistor
  172. JCM 900 dual reverb effects loop problem
  173. TRRI blew up - no power - please help
  174. Ampeg svp1600
  175. Ampeg B-15T
  176. Mesa Mark 3 preamp tube heater voltage
  177. QUESTION: Biasing a '65 Reissue Deluxe Reverb
  178. fender deluxe 90 DSP problem
  179. overcompressed sound in new amp
  180. Kustom Dual 35 DFX Schematics
  181. how does it work?
  182. Mesa MkII bias caps
  183. DR Treble response
  184. blues deville floating relay
  185. ESR Meter
  186. power supply caps
  187. AC15 reissue problems
  188. SF Twin Reverb Distortion - Filter Caps???
  189. Ampeg SVT 400 T Distortion
  190. Peavey Bandit 112 Transtube - Dodgy pots?
  191. plate resistor problem....?
  192. Acoustic 470 Lamp Driver Issue
  193. Problem with DR reverb driver
  194. vox valvetronics self test mode
  195. peavey 5150 / marshll 1987x
  196. Mesa Boogie Mark 3 Gain Loss
  197. speaker wiring question
  198. Danelectro Cadet 122 problems
  199. Ampeg SB12 Hum
  200. randall bass amp distorts
  201. Showman tremolo on without footswitch
  202. Frontman 25R Channel Switching/Footswitch Problem.
  203. Fender M-80
  204. 86 Carvin X100 trouble.No Volume,cooked resistor
  205. parasitic?
  206. VS65R - No Output, Preamp works
  207. Need help with Fender Schematic
  208. Marshall Valve Problem
  209. Arcing in power tubes
  210. Fender HD Deluxe -Update on using different dropping resistors
  211. Marshall DSL 401 No Sound! Really Need some help!!
  212. marshall that whistle
  213. Randall distorts
  214. Marshall tubes marked vlve000..etc
  215. Help: Diagnosing Non-Functional Reverb
  216. Mystery Caps in my amp??? need help
  217. Fender Champion 600 Switch
  218. Sunn Beta Lead blown?
  219. Ampeg VT60 schematic needed
  220. RE-301 noise on reverb
  221. 22/33uf Filter Caps
  222. Ultra 112 Ch. Switching Nightmare.....
  223. Advice for learning
  224. Biasing Ampeg amp Teach me!
  225. Behringer GMX110 - 20vDC at Speaker Output
  226. Peavey Transformer 112; loud hum
  227. Jcm 2000 marshall Dls 100
  228. Need Help/Advise
  229. Mesa MkIIB - Relay Buzzing
  230. Could it be this simple? (Fender Dual Pro)
  231. 4 Tube amp Questions for noob
  232. Noisy Elmwood - could it be damaged?
  233. Triple Rectifier - hissing
  234. QUESTION: How to Diagnose a defective speaker?
  235. Help with marshall jtm-30 & 60
  236. 68 'twin Vibrato
  237. AC30 needs retubing
  238. Old Princeton Reverb keeps blowing fuses
  239. Morley EVO-1 oilcan echo
  240. SVT fan coming through speakers
  241. MG100HDFX - Help required please.....
  242. Amp crackle with note - I'm stumped!
  243. Unspecific Peavey 5150 question...
  244. Black face Dual Showman ??s
  245. Fender Hotrod Deluxe poweramp distorting
  246. Vox AD60VT loses memory when using foot controller
  247. Amps blowing fuses. Please help.
  248. power tubes flashing along with trem, help!
  249. Yamaha G50-112 Schematic Needed
  250. peavey clone again