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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Special 130 resistor value
  2. Blown output tranny?
  3. Cleaning Pinch Roller on a roland Space Echo?
  4. Marshall 6100 problems.
  5. Funny issue with a SF Fender twin...
  6. Kt66 considered for retube
  7. Geeked! Fixed my first tube amp!
  8. New Power Transformer Install Help JTM30
  9. faulty speaker?
  10. Vibrochamp tone stack problem
  11. bassman AA165 volume does not go to 0
  12. Question about biasing Fender 94 Twin...?
  13. Acoustic 125 with low output
  14. Channel switching - Blues Deluxe
  15. help with SS amp repair (Fender Stage 1600)
  16. My Ampeg BA115 won't stop blowing fuses!
  17. tsl 100 screen grid resistors
  18. 1975 Peavey Deuce question.
  19. Speaker Terminal - broken
  20. Tube burn up
  21. 5150II Not playing once warmed up?
  22. Apology to: GTR TECH and JAG.
  23. mesa triple rectifier
  24. Twin Reverb 65 RI - Reverb Hum
  25. fender quad reverb blown, repair help.
  26. HV on speaker
  27. Fender Stage 112SE - DEAD
  28. Troubleshooting for dummies...
  29. Bogner Shiva: Channel 2 Bass help
  30. Marshall Valvestate 8004 - Blowing TDA1514A's
  31. Need some help troubleshooting an Ashdown FA-60
  32. Bias -V pin 5 jtm60
  33. Marshall JCM 900 New Tubes
  34. jcm 200 dsl 100 head blowing H.T. fuse with the effects loop.?
  35. Unsteady Bias on 5F6A
  36. GK1001rb - Help!
  37. Fender Twin Po Tube = 100 watt boat whistle
  38. Bad power tube or oscillation?
  39. Speaker Recone?
  40. Bias Question - Rookie Needs Guidance
  41. 65 Fender Twin Reissue - No Reverb
  42. Seek OT-215 Substitute
  43. Testing caps?
  44. Transformer shunt bias adjustment
  45. 5150 vs. 380V
  46. Gibson Duo-Medalist - too much treble, not enough volume!
  47. JCM 2000 DSL 100w help - audio problems, burning smell
  48. Floor vs. Wall Mounted Reverb Pans???
  49. Roland Studio 6V troubleshooting question
  50. Finding the source (hissing problem)
  51. favorite wire stripper for small guage wire?
  52. Transistor search. 2sk184gr & 2sk363gr
  53. Looking for Dome Knobs with Dot Pointer
  54. Noise from logo light
  55. Firefly - First build problems
  56. Super Reverb RI resonance/microphonics? Weird.
  57. Pv 2000
  58. problem with filament rectified supply
  59. Hum - PT inducing this into the OT?
  60. 70's Ampeg SVT crackling, popping, fan problem
  61. Question about Mesa MkIIB schematic....
  62. When to change tubes on mesa boogies?
  63. loud popping volume.
  64. Microphonics driving me nuts!
  65. JCM800 Burning Tubes - HELP!!!
  66. Pedal problems
  67. Funky axial electrolytics
  68. Need info on Crate PA-B8350
  69. Ampeg VT-22 question
  70. My peavey bandit works rather weird
  71. HR DeVille 112 noise
  72. ? about LM3080N used in a peavey amp
  73. Bogen CHB 35A Always a bit Distorted
  74. 70's Ampeg SVT repair help needed
  75. fender tube
  76. To crimp or NOT crimp
  77. BF Super Twin Reverb - Burnt resistor
  78. JCM 900 dual reverb effects loop problem
  79. TRRI blew up - no power - please help
  80. Ampeg svp1600
  81. Ampeg B-15T
  82. Mesa Mark 3 preamp tube heater voltage
  83. QUESTION: Biasing a '65 Reissue Deluxe Reverb
  84. fender deluxe 90 DSP problem
  85. overcompressed sound in new amp
  86. Kustom Dual 35 DFX Schematics
  87. how does it work?
  88. Mesa MkII bias caps
  89. DR Treble response
  90. blues deville floating relay
  91. ESR Meter
  92. power supply caps
  93. AC15 reissue problems
  94. SF Twin Reverb Distortion - Filter Caps???
  95. Ampeg SVT 400 T Distortion
  96. Peavey Bandit 112 Transtube - Dodgy pots?
  97. plate resistor problem....?
  98. Acoustic 470 Lamp Driver Issue
  99. Problem with DR reverb driver
  100. vox valvetronics self test mode
  101. peavey 5150 / marshll 1987x
  102. Mesa Boogie Mark 3 Gain Loss
  103. speaker wiring question
  104. Danelectro Cadet 122 problems
  105. Ampeg SB12 Hum
  106. randall bass amp distorts
  107. Showman tremolo on without footswitch
  108. Frontman 25R Channel Switching/Footswitch Problem.
  109. Fender M-80
  110. 86 Carvin X100 trouble.No Volume,cooked resistor
  111. parasitic?
  112. VS65R - No Output, Preamp works
  113. Need help with Fender Schematic
  114. Marshall Valve Problem
  115. Arcing in power tubes
  116. Fender HD Deluxe -Update on using different dropping resistors
  117. Marshall DSL 401 No Sound! Really Need some help!!
  118. marshall that whistle
  119. Randall distorts
  120. Marshall tubes marked vlve000..etc
  121. Help: Diagnosing Non-Functional Reverb
  122. Mystery Caps in my amp??? need help
  123. Fender Champion 600 Switch
  124. Sunn Beta Lead blown?
  125. Ampeg VT60 schematic needed
  126. RE-301 noise on reverb
  127. 22/33uf Filter Caps
  128. Ultra 112 Ch. Switching Nightmare.....
  129. Advice for learning
  130. Biasing Ampeg amp Teach me!
  131. Behringer GMX110 - 20vDC at Speaker Output
  132. Peavey Transformer 112; loud hum
  133. Jcm 2000 marshall Dls 100
  134. Need Help/Advise
  135. Mesa MkIIB - Relay Buzzing
  136. Could it be this simple? (Fender Dual Pro)
  137. 4 Tube amp Questions for noob
  138. Noisy Elmwood - could it be damaged?
  139. Triple Rectifier - hissing
  140. QUESTION: How to Diagnose a defective speaker?
  141. Help with marshall jtm-30 & 60
  142. 68 'twin Vibrato
  143. AC30 needs retubing
  144. Old Princeton Reverb keeps blowing fuses
  145. Morley EVO-1 oilcan echo
  146. SVT fan coming through speakers
  147. MG100HDFX - Help required please.....
  148. Amp crackle with note - I'm stumped!
  149. Unspecific Peavey 5150 question...
  150. Black face Dual Showman ??s
  151. Fender Hotrod Deluxe poweramp distorting
  152. Vox AD60VT loses memory when using foot controller
  153. Amps blowing fuses. Please help.
  154. power tubes flashing along with trem, help!
  155. Yamaha G50-112 Schematic Needed
  156. peavey clone again
  157. Fender Ultimate Chrous
  158. Roland Cube60 problem
  159. Peavey Classic 30 1x12 gone dead
  160. Blues Deluxe Reissue low volume
  161. magantone 431 chirping when vibrato is on
  162. Kendrick Gusher
  163. DRRI question????
  164. transformer wiring
  165. Vox AC-15 Problem
  166. SVT-2 Pro problems
  167. No output from 5150II
  168. Installing 3 prong cord in GA5
  169. Cornford Hurricane Reverb issue
  170. Need Output Modules for MF350
  171. Low Power w/ SF Bassman
  172. Help!!! Marshall DSL 401 Issue!!!
  173. fender princeton 650 making popping noises
  174. Dsl 401
  175. Rusted SVT transformers
  176. Fender reverb send/return as effects loop?
  177. Music Man 2275-65 break-up
  178. Acoustic 150b unwanted disortion
  179. Behringer BX1200 low Output
  180. Silvertone 1482
  181. Russian 6V6's arcing internally
  182. peavey classic 50 won't turn on, burnt cap.. help!
  183. Treble Control popping noise
  184. scratchy presence pot
  185. Rivera R55 cap popped
  186. Amp cuts out at loud volume
  187. Marshall hdfx schems?
  188. SJ 83100 transistor data sheet
  189. Can I bias my 6505+ / 5150-II?
  190. Question about tube pins and schematics
  191. Question about discharging capacitors
  192. Gallien Krueger fan not working
  193. Pignose B100V
  194. Music Man Capacitors
  195. Very Unstable Amp - Oscillation
  196. Should these resistors be replaced? Pic
  197. Verlage VTR-100 Schematic Needed
  198. JMP1 preamp battery replacement - solder or glue it in?
  199. Questions about cap job I had done
  200. SF Twin Reverb - fuse blowing
  201. vox valvetronics head
  202. Marshall TSL 122: Almost no volume
  203. My amp won't come off standby... please help.
  204. Invader 60 1970's Head
  205. Fender Rumble 100 Extension Speaker
  206. Oh my god!!!!!!!
  207. Mesa Simul 2:90
  208. Peavey XR400 fried 200H module
  209. jcm900
  210. Looking for vox info
  211. Trace Elliot V-type preamp noisy ground
  212. Peavey TNT100 - DC298 dead transformer
  213. line out for peavey tnt 100
  214. JCM900 chips?
  215. Peavey classic duel 212 scratchy popping noise
  216. Recapping Gibson G-10 questions
  217. Marshall caps....what type?
  218. Trying to repair the tremolo in a Silvertone 1472
  219. Pa 100, updates and prob with reverb
  220. Carvin PB150 biasing
  221. Marshall Valvestate 8008 pots, log or lin?
  222. No reverb in Hot Rod Deluxe
  223. Fender 65 Deluxe Reverb RI shutting down...
  224. ampeg v4 buzzing output with just power switch on
  225. Fender Ultra Chorus, Noisey Left Channel.
  226. Amplifier cut outs
  227. Heyboer color codes
  228. Marshall AVT50H
  229. Slide on Connectors for Valve JR
  230. Acoustic 370 grounding issue, ch2 buzz
  231. Dead Harmony h303a
  232. Help on Marshall AVT150H gone bad..please
  233. G-dec
  234. Sound Fluctuation with Single Rectifier! HELP
  235. Sound Fluctuation with Single Rectifier! HELP
  236. Marshall mg250dfx...HELP
  237. Need work from an amp tech...
  238. Yamaha P7000S
  239. Burning Fuses
  240. Marshall squeals like a pig
  241. Acoustic 320, low output (again!)
  242. tiny terror clone -> just humm, sound
  243. Pignose G40v- maintenance?
  244. HA3500a with a very hot Heatsink
  245. old Laney 610v B+ what tubes?
  246. Noob, did I hurt my new amp?
  247. Hot Rod Deville - speaker mounting screws
  248. Fender Pro 185 need resistor
  249. What the heck is B+, and that A on AA764 Champ Schematic?
  250. Marshall JCM2000 DSL 100 biasing?