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View Full Version : Maintenance, Troubleshooting & Repair



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  1. New tube in Marshall VS100
  2. Black Face Deluxe Reverb noise issue
  3. all tubes light up but rectifier- Drz Z-28
  4. Arcing Issue
  5. Have four mackie hd1531 powerd speakers all with the same issues, need some help
  6. Wiring a Fender style lamp with 110v, dropping resistor 100k ??
  7. Schematic for 96 Marshall VS100
  8. Epiphone Valve Senior Combo problem
  9. Fender Reverb Head Scratcher
  10. Regal Music amp
  11. Epiphone Galaxie makes buzzing noise
  12. Not Enough Bias Voltage?
  13. '65 TRRI squeals when input is unplugged
  14. Learning the hard way not to take shortcuts
  15. problems with 15 volt power supply in Eden amp
  16. Resistor value question
  17. Grainy/Trashy noise on tube amp
  18. Peavey 6 pin din replacement help
  19. replacement speaker for polytone mini bruteII
  20. Red hot coil in the centre of 6P14P-EV
  21. Best 1/4 Inch Input Jack
  22. Peavey 400BH
  23. Matchless Clubman oscillation
  24. Polytone Mini-Brute I hums
  25. GS15r ampeg gemini reverb out
  26. 18 watt Brownote
  27. Capacitor Voltage rating Question
  28. Problem with new build (dark sounding)
  29. Somebody set up bias on a princeton reverb ri??
  30. Fender Super60 + HARLEY BENTON G412A VINTAGE
  31. SELMER TV6 troubles
  32. fender blues jr problem
  33. Crate BV6212 "Self-Biasing"
  34. Customer of the Month
  35. Problem with excessive current draw
  36. ticking 5F1
  37. Humming Univox U 155
  38. Bias on a Carlsbro 50TOP Evo
  39. Results of light bulb current limiter ?
  40. Best quality octal sockets for 71 superlead?
  41. balancing the bias of quads on SF twin
  42. Mesa .50 caliber with red plates
  43. JCM2000 TSL100...what does this mean?
  44. Amp cutting out
  45. Total noob moment...
  46. Kustom 150SC pops when turned off and on
  47. Marshall Mosfet 100 (5213) Reverb Not Working, Also not the tank
  48. Bad 60z Hum
  49. 5150 Combo problem
  50. Fender SKX-65R non-functioning reverb, NOT the reverb tank
  51. My Palomino V16 stopped working
  52. Jackson JG-2 50 Watt - Intermittent Problem
  53. HeathKit TA-16
  54. Hot Rot De Ville 212 - 2002
  55. Traynor TS120B bass amp
  56. Silvertone 1474 heaters out on both 12AX7s
  57. Dual Rectifier - complete gain and volume drop on channels 2 & 3 HELP!
  58. Westbury Model 1000 - Very Noisy
  59. Traynor YBA-2 eats EL84 for lunch B+ too high?
  60. Anyone else have a slow august for repairs?
  61. Leilani amp by Gourley question
  62. Marshall valvestate 8200 poping noise and low volume from left speaker outs
  63. Marshall head rated at 4ohms
  64. Fender Princeton Chorus - Bad Static and Thunder
  65. Music Man RP100
  66. Marshall AVT150H
  67. A.R.T DST-830 SS / Tube analog /digital troubleshoot / repair
  68. EARLY 90's FENDER BLUES DEVILLE SOUNDS REAL MUDDY, CAN'T READ BIAS CURRENT
  69. Ampeg BA115HP trouble
  70. Just curious if there are any other youngish guys or even gal techs or shop owners
  71. SFVR calls for 5UR4 but has 5AR4
  72. Ampeg B2R
  73. Purpose Of Series Input Resistor?
  74. JCM900 Power transfromer in Europe
  75. How to Lower B+, to compensate for S.S. rectifier?
  76. Behringer Europower PMP1280S power supply?
  77. Ampeg SVT410HLF Cabinet
  78. Distortion problems
  79. Very old Gibson GA20 problem - FIREWORKS!
  80. Scared to plug in motor
  81. Tech things I should've added years ago
  82. Why Do I Do This?-Classic 30 problem
  83. Peavey 400HB revisions/compatibility
  84. 5F6A build shorting/low voltage on power tubes
  85. Marshall MHZ40 footswitch problem
  86. Neon/LDR Tremolo Repair
  87. Ampeg PortaBass 250
  88. super reverb output values, please
  89. SWR Workingmans 12 - amp blows fuse
  90. Maximum Input Voltage?
  91. Ampeg SVT-II Loud Hum
  92. Tubes glowing blue get extremely hot extremley fast
  93. Cathode biased 6L6 amp (modelled after twin 5c8) very quiet after playing a while
  94. Two Marshall Haze 40's with the same difficult problem
  95. Mackie/Tapco Thump 18 tip
  96. Marshall JCM 800 Lead series 2205, help please!
  97. Crate GXT-100 PT
  98. crate v15 bias
  99. Dumb tube questions
  100. Out of my depth with Stromberg-Carlson AU-34 rebuild!
  101. Silvertone 1484 Replacement Knobs
  102. Ampeg svtiii pro relay
  103. Gibson GA5-T Skylark Tremolo Annoyance (6BM8 version)
  104. Peavey Triumph 120 - Bad relay causing bad sound?
  105. Fender Concert
  106. Peavey Mark III - 260C: Getting 40 VDC out to the speaker
  107. 66' twin
  108. Bad Cat Hot Cat build ?
  109. Another Supro... model 88T
  110. Ampeg V-4R repair
  111. Vox UL4120 power amp voltages
  112. Anyone have or know of a good source for beringer parts?
  113. Matching impedence of Marshall Valvestate head to a Mesa Boogie 4x12 cab
  114. Tremolo issue - AB763 amp
  115. Marshall JMP 50W Voltage Question
  116. Remove tube from base
  117. Fender Frontman 212R major issues- PLEASE HELP!
  118. Crate battery amp V-reg problem
  119. 2001 bad cat black cat, vibrating sound
  120. Again Troubles with Roland Bolt-30 - Dead/ Unknown parts
  121. SWR SM-900 Distorting
  122. AA764 blackface Vibro Champ cooking cathode resistor.
  123. Peavey TNT 130, DDT forever active
  124. Need help with SVT II Pro
  125. Bad PS hum on Ultra Linear Twin
  126. Marshall T64/T65 cross?
  127. '59 Fender Bassman Reissue low volume
  128. Peavey Bandit Problem - Hum, no output
  129. Cap ID , Does anyone recognize these?
  130. Peavey Deuce - loosing power
  131. Randall RG80 Hum
  132. Marshall Artist 3203--fizzy, scratchy distortion
  133. Help. Is my Peavey Studio Chorus 210 FUBAR'd?
  134. Power supply capacitors,, What's up?
  135. Bugera 333XL Biasing Instructions
  136. Marshall g100r cd head
  137. Crate blue voodoo werid feedback noise not making sense need help
  138. Dr.Z Z-28 Choke and transformer values?
  139. Marshall Jcm 2000 volume fade out!
  140. AMPEG SVT PRO 7 switches OFF after 2 seconds - why ?
  141. SWR Mo' Bass Rail Problems
  142. Help! 5e3 is making a ocsillation noise
  143. fender pro jr cap & resistor betw plates
  144. Electrolytic replacements for vintage amps
  145. Marshall mf350 mode 4
  146. 64 Fender Pro Reverb Problems
  147. Gibson Sabre
  148. Earth amps are like Peaveys?
  149. Power transformer strong enough for a small SE Tube Amp with 3 tubes ?
  150. Crate Amp GLX65
  151. Power transformers - OK to use 240VAC primaries with a 230VAC power outlet?
  152. Sunn Concert lead PA
  153. Help with Crate CA-125 Acoustic Amp
  154. Problems on Marshall Valvestate vs100 (Head) - tha amp hums and no sound
  155. Output Transformer Troubleshooting
  156. Twin reverb sparky distortion
  157. '66 Blackface bassman choking from oscillation (??)
  158. Acoustic 370 Amp Power Module Troubleshooting Question
  159. Vx Valvetronix VT15
  160. Ampeg b25b problem
  161. Bias current sweetspot for 1975 Princeton?
  162. DSL401 resistor value concern
  163. SWR Workingman's 2004...fuse F1 value?
  164. Mesa Boogie F-30 Dead Channel Issue?
  165. Blackfaced SF Twin Reverb issues
  166. Crate RFX120
  167. Peavey Mace VT 2x12 // Sounds like ring modulator, Help!
  168. 2205 reverb drive transformer.
  169. Peavey Classic VTX very low B+
  170. Peavey TNT 115 Oscillating
  171. Reverb tank
  172. TSL100 Hum
  173. Hot Rod Deluxe Trouble
  174. vintage Traynor ygl-3 mark 3 reverb problem
  175. Marshall Mode Four MF350 crackling at power on
  176. Solved Hartke 3500 shutdown problem
  177. Arshall AVT 150 High-Pitched Noise
  178. HELP!....Ampeg SVT 3 Pro
  179. jcm 2000 tsl100 problems on a sunday!!!
  180. Trouble in amp land!
  181. Ampeg VL-502 and Lee Jackson GP-1000 Preamp Problem, Help Please
  182. B52 AT100 Bias Instructions
  183. JCM2000 Unusual low volume on clean channel
  184. Worlds best solder sucker
  185. 1/4" Panel Mount 4 and 6 Leg Through Hole Jacks
  186. Peavey XXX massive distortion
  187. Bugera help
  188. Has anyone every dropped and dented a transformer on the corner??
  189. Early 70's Equalizer with reverb box!
  190. Marshall ST1 Pcb
  191. Marshall Amps
  192. Classic 30 Dropping Resistor
  193. Marshall AVT100: DFX Not Working
  194. Fender bandmaster reissue r69 keeps burning up
  195. '61 Gibson GA30RV ... power problems
  196. Fender Princeton Reverb Reissue w/ hum problem at idle = bad rectifier
  197. 65 Deluxe Reissue Tremolo Not functional
  198. Peavey Heritage VTX....problem
  199. guitar amp dont have power no lights in panel peavey vypyr 75
  200. Trouble with 2006 Deluxe Reverb Reissue
  201. carlbro stingray bass head
  202. TSL Clean Channel Problem (sound coming out through with all controls on 0)
  203. Sunn Studio PA troubleshooting
  204. peavey triumph 60 problem
  205. Fender Hot Rod DeVille 410 cutting in and out
  206. Sano 50wr tremolo
  207. Ampeg VT40 problems
  208. VOX AC30TB reissue voltage selector
  209. Software based function generator
  210. Gibson GA20 (old, octal preamp)
  211. Gibson Thor bias?
  212. My music man 65 is driving me nuts Hums even with out tubes fuse blows
  213. Ampeg G-15 Reverb Help
  214. Marshall jcm 2000 problem
  215. AMP BH-260 Low Output
  216. AC30 CC2 crackling...?
  217. Marshall tsl bias range too high at lowest setting. Resistor change?
  218. Marshall 2205 very bright- drifted R9 resister?
  219. Ampeg vintage svt help - need replacement hum control pot
  220. Peavey 6505+ schematics
  221. silent swr workingman 15
  222. JCM 900 2100 w/ potential blown PT
  223. RC4558NB
  224. Mesa Solo 50 Head - Low-ish Output
  225. "The reverb doesn't work. I think it has dirt in it. You should maybe try...
  226. New eyelet board + complete parts kit for AB763 / Deluxe Reverb
  227. Scratchy soundingPots
  228. Crate CR-165B amp ?
  229. Noisy Reverb on Rivera R55-12
  230. Peavey valveking 100 head blowing the fuse for the 14V circuit
  231. Marshall G80RCD trouble
  232. Peavey Bandit 112 problem
  233. Peavey XR-1200 / CS-400 Blowing Fuses and Power transistors
  234. Know a good 8" speaker??
  235. Biasing peavey windsor
  236. 1 pair output tubes rapidly draw excessive current
  237. Its me again withe the old peavey
  238. No Sound, hum, or hiss from SLO Clone
  239. Oscillation help
  240. Valvestate 100 OD ch issues
  241. Marhsall jcm2000 DSL-401 - footswitch won't switch between od1/od2 (front panel will)
  242. Fender Hot Rod Deluxe question
  243. Is anyone intrested in helping me get an old peavey running?
  244. got power light on but no sound?
  245. Weird Vibrato oscillation in a Princeton Reverb Clone build
  246. Fender Super 60 Reverb Tank Replacement
  247. Fender Super 60 Input Jack Repair
  248. Crate B160XL problems...
  249. Mesa Boogie Mk4 Slow to warm up
  250. Need help identifying this amp