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View Full Version : Maintenance, Troubleshooting & Repair



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  1. AMPEG TUBE HEAD Problem!
  2. What's up with my NFB ?????????
  3. Hum in my 5F6-a
  4. Ampeg SVT-5 Pro distortion
  5. JC-120 input jacks...
  6. B&K Tube Tester & output tube question
  7. SS tremolo
  8. Dead channel on marshall vs100h HELP!!!
  9. prosonic reverb hum mod/repair
  10. Weber 5C5 popping/cracking
  11. mackie amp help
  12. Peavey session 500 Pedalsteel amp
  13. Transformer swap Question
  14. Is my OT blown ? and associated question.
  15. A bad case Of Bias,or a hot time in the old amp last night
  16. JC-120 tone disalbed?
  17. Troubles with recent Ampeg tube amps
  18. Mesa 50 cal. volume/gain issues
  19. Music Man RD110-30
  20. Will I find this fuse @ Radio Shack?
  21. Peavey Chorus 400
  22. strange champ problem
  23. Bizarre biasing problem !!
  24. JC-120 Chorus is making my wife seasick!
  25. 65 RI Twin borrowed came back DOA, Help!
  26. 5150 combo broke!!! awwwwwwwww
  27. Still struggling with powering my relays
  28. I need help with an amp schematic please (fuses).
  29. What DC Resistance should a Fender twin OT measure?
  30. DR-Home brew Preamp Tube Plate Voltage Question.
  31. marshall 50/50 output trany wiring?
  32. Would installing a choke help SE hum?
  33. SWR LA-15 very hot
  34. Ampeg BA210sp power down mute mod
  35. Resistor lead diamater
  36. SWR LA-15 'noise suppression' at power up.
  37. need to replace sliders for Acoustic 370 head
  38. Gibson Falcon Reverb Problem.
  39. blew up my peavey xxx need help
  40. peavey mace vt series head fault
  41. yahmaha j-55 reverb problem
  42. peavy problems
  43. Mackie power amp problem
  44. SF Dual Showman Ultralinear blowing 6L6's
  45. 5150ii problem with channel switching
  46. Gallien Krueger 800rb 300 watt side dead.
  47. princeton speaker help?
  48. Weird feedback ?
  49. 70's Hiwatt 4x12
  50. Behringer GM108 problem
  51. Roland Blues Cube 30 question
  52. MusicMan 112 RD50 footswitch wiring?
  53. distorted g-k?
  54. Hot Rod Deluxe Problem
  55. Homebrew reverb problem - Send side I think
  56. Gallien Krueger 700rb Protection Mode
  57. Loud squeal (oscillation?) after replacing output transformer
  58. volume loss
  59. How to care of your tube amplifier
  60. Knob on top of power transformer
  61. 74' Marshall JMP 50w broke
  62. 74' Marshall JMP 50w broke
  63. Superstrange reverb on Normal channel problem... (BFSR)
  64. Fender Deluxe Reverb b/f gives no sound
  65. Peavey Classic 50/212 Lead channel volume
  66. peavey bandit 112 cutting out
  67. TL604CP source or substitute\adaptation of another chip?
  68. Silvertone 1472 Guitar Amp - Tremolo repair
  69. Peavey KB100 - overheating power transistor
  70. BA115 blown tweeter
  71. Acoustic 470 PA Issue
  72. Bassman 70 maintainance
  73. Fender Supersonic: Bias going CRAZY (120ma), weird sound
  74. How noisy is a healthy Peavey TNT115BW?
  75. Does playing at 10 harm a decent amp?
  76. switching issue on fender fm 212r
  77. Capacitor Temperature ratings
  78. Fender Frontman 15r Blown Fuse
  79. Fender Hot Rod Deville
  80. Sovtek Mig 100H Output transformer
  81. Behringer v tone problem
  82. hum 74 twin reverb
  83. peavey encore 65
  84. What makes a preamp tube bias go crazy???
  85. 5150 Noise
  86. Rookie Question: Replacing Tube Socket
  87. jcm 2000 bias problem
  88. JJ 6L6 silver top turns white
  89. Getter halo turned dull and brownish: tube still good?
  90. Rojland Jazz Chorus JC-120 Repair??
  91. Fender Bandmaster AB763 Vibrato problem
  92. Need to make 3 more nights of gig!
  93. Fender "The Twin" (red knob) bias question
  94. Blown Bass Amp (help!!)
  95. Ampeg VT22 filter cap question
  96. Musicman rehab
  97. No Sound, Blue Glow... How'd this happen?!?
  98. No Sound, Blue Glow... How'd this happen?!?
  99. Hot Rod DeVille 410 issue
  100. Bass Pot - AA764
  101. Need help on an AA764 Vibro Champ
  102. Swr 400
  103. Fender 125A32A OT?
  104. Marshall TSL 122 biasing
  105. Bugera 333xl-212 big problem
  106. Carvin Mixer Board "Component I have not seen before"
  107. Amp Shocks Me
  108. What Happened?
  109. The Twin PT- again?
  110. Amp hiss/drone
  111. Looking for a Twin Reverb II faceplate
  112. Marshall VS100 Head...DEAD!?
  113. Behringer PMH3000 power supply
  114. fender faint sound
  115. need help with marshall as100d
  116. Marshall 1959 head - OT vs. EL-34's
  117. Recommendations for Test Equipment Wanted
  118. Volume dial not working on Chmpion 30 DSP
  119. Changed tape in RE-301 and now lacks intensity and output.
  120. unwanted distortion and crackle in laney bass amp
  121. Bassman 70 - both channels hum
  122. How do i set my ohms for a 5150/marshall 1960 lead cab
  123. Reverb tank feedback: could this pig stop squealing???
  124. Identifying different PT primaries
  125. 5150 help
  126. Vibro Champ rising DC leakage problem
  127. Early JC-120: chorus works, controls don't - help?
  128. Problem with my PEAVEY 5150 Help!!!
  129. a question about capacitor size?
  130. Electrolytic Recapping - Low ESR?
  131. Tweed Harvard conversion
  132. Fender Pro Reverb 69 - phase inverter problem
  133. Snap Crackle Pop in my 5F2A
  134. Roland BC-30 low output.... any ideas?
  135. Bad bias pot - Hot Rod Deluxe
  136. Triton pro - After touch strip
  137. Source for 6C10 Tubes? For Ampeg Jet
  138. fender ultra chorus reverb don't work
  139. Jazz chorus output trannies dead
  140. Marshall MF350 question.
  141. "The Twin" is HOT!!!
  142. help troubleshooting fender ultimate chorus
  143. Is it "ghosting"?
  144. What EL34's for MusicMan?
  145. crossover help
  146. 1990's Ampeg Reverberocket 1X12 USA REVERB PROBLEM
  147. Stilletto info
  148. repair checklist
  149. :( HELP! distored cleans on low volumes w/TSL 60
  150. Clipping in the lead channel, need answers:(
  151. HD Deluxe 16volt reg solution
  152. crate volume flux's
  153. Hot Rod Deluxe Hum
  154. BBE B-Max input mod?
  155. Can a Tube Socket Be Repaired?
  156. Help with Peavey Hybrid/Ultraliner output
  157. Soldering Technique
  158. DSL JCM2000 - Phase Inverter Hum/Voltages
  159. Shobud Amp SB15 (Solid State) volume fluctuates
  160. MusicMan 65, transistor driver
  161. Marshall 5212 repair
  162. Peavey 5150 combo NEED HELP!
  163. Fender Evil Twin Red Knob help please
  164. Jcm2000 - hum
  165. Peavey Classic 30 using NOS Tubes
  166. Marshall dsl 50 problem!
  167. 7800/100V cap can for Acoustic 370
  168. Treble Control Dead...!!
  169. Marshall JCM800 (2205) 50w problem
  170. Rheem/Califone 1909R - Need Help!
  171. 5F1 Champ DIY: No sound (Tube/Transformer)
  172. Carvin output amp
  173. Marshall AVT150H trouble
  174. Hot Rod Deville Crackling leaving Standby Mode
  175. Fender silverface / blackface bias question
  176. Marshall jcm900 squeal at power off
  177. Interesting discovery on my V18 (they screwed up!)
  178. BUZ901P BUZ906P replacements
  179. how to fix my fender blues junior
  180. Crate TD70 fades out
  181. Deluxe Reverb RI - No current
  182. Costly rookie mistake?
  183. anything that can be done to sweeten up the reverb?
  184. Need advice on installing an 8 pin IC Socket
  185. peavey renown 400 reverb problem
  186. Weird rattle in Crate V-18
  187. Pv xrd680+
  188. blues Jr Problem
  189. blues deluxe is dying!
  190. 5150 evh power transformer
  191. Blues Junior's smoking.....literally
  192. Hot Rod Deluxe Reverb inop, What are these wires for?
  193. Line 6 exp pedal voltage range
  194. The Twin power trans?
  195. peavy 5150 combo
  196. Special 130 resistor value
  197. Blown output tranny?
  198. Cleaning Pinch Roller on a roland Space Echo?
  199. Marshall 6100 problems.
  200. Funny issue with a SF Fender twin...
  201. Kt66 considered for retube
  202. Geeked! Fixed my first tube amp!
  203. New Power Transformer Install Help JTM30
  204. faulty speaker?
  205. Vibrochamp tone stack problem
  206. bassman AA165 volume does not go to 0
  207. Question about biasing Fender 94 Twin...?
  208. Acoustic 125 with low output
  209. Channel switching - Blues Deluxe
  210. help with SS amp repair (Fender Stage 1600)
  211. My Ampeg BA115 won't stop blowing fuses!
  212. tsl 100 screen grid resistors
  213. 1975 Peavey Deuce question.
  214. Speaker Terminal - broken
  215. Tube burn up
  216. 5150II Not playing once warmed up?
  217. Apology to: GTR TECH and JAG.
  218. mesa triple rectifier
  219. Twin Reverb 65 RI - Reverb Hum
  220. fender quad reverb blown, repair help.
  221. HV on speaker
  222. Fender Stage 112SE - DEAD
  223. Troubleshooting for dummies...
  224. Bogner Shiva: Channel 2 Bass help
  225. Marshall Valvestate 8004 - Blowing TDA1514A's
  226. Need some help troubleshooting an Ashdown FA-60
  227. Bias -V pin 5 jtm60
  228. Marshall JCM 900 New Tubes
  229. jcm 200 dsl 100 head blowing H.T. fuse with the effects loop.?
  230. Unsteady Bias on 5F6A
  231. GK1001rb - Help!
  232. Fender Twin Po Tube = 100 watt boat whistle
  233. Bad power tube or oscillation?
  234. Speaker Recone?
  235. Bias Question - Rookie Needs Guidance
  236. 65 Fender Twin Reissue - No Reverb
  237. Seek OT-215 Substitute
  238. Testing caps?
  239. Transformer shunt bias adjustment
  240. 5150 vs. 380V
  241. Gibson Duo-Medalist - too much treble, not enough volume!
  242. JCM 2000 DSL 100w help - audio problems, burning smell
  243. Floor vs. Wall Mounted Reverb Pans???
  244. Roland Studio 6V troubleshooting question
  245. Finding the source (hissing problem)
  246. favorite wire stripper for small guage wire?
  247. Transistor search. 2sk184gr & 2sk363gr
  248. Looking for Dome Knobs with Dot Pointer
  249. Noise from logo light
  250. Firefly - First build problems