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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Cant seem to figure this one out......Soldano designed Yamaha T50C
  2. Super Reverb
  3. BNC or Banana Jacks to 1/4 jack
  4. Trouble shooting Silvertone twin twelve, squeal
  5. Hartke 3500 problem
  6. 50's Rickenbacker M8 amp died today. Help!
  7. Advice needed- best way to lower plate voltage
  8. Trouble with Fender frontman 15g
  9. Problem with a plexi
  10. loud hum w/ my Mesa
  11. Crate V18 does anyone have schematic for the smps pcb?
  12. Ampeg BA115 Trouble Shooting
  13. Fried my Ampeg AX-70!?
  14. Peavey Classic VT tube problem
  15. KT88 Champ
  16. Sunn Model T cap job
  17. el-84 red plating
  18. Help with Peavy Classic 50 4*10
  19. Peavey Chorus 400
  20. peavy bandit reverb out.
  21. Crate vintage club 30 volume spikes?
  22. Which Bias Probe to get? Compu-Bias or ??
  23. Crate G10-XL info
  24. Power Tube Rattle
  25. Not sending to reverb on Traynor YCV20
  26. Fender Super 210, no clean channel, stays loud
  27. SVT short, OPT suspected.
  28. Line 6 AX2 repair help
  29. Ampeg SVT-5 Pro Misc Questions
  30. Test point input signal
  31. Bugera V22
  32. Help fixing my Mesa Boogie Mark IV
  33. Need help with a 1988ish Polytone
  34. Fender Frontman 65R - hiss when cable plugged in
  35. Bad OT affect bias, cause redplating?
  36. new combo smell is it normal
  37. Orange Rocker 30 volume in&out
  38. Acoustic B200 short problem.
  39. Diagnosis assistant
  40. How to wire this Hiwatt Custom 20 fix?
  41. PT hum in Orange OR 80
  42. 60Hz Hum in Mesa Boogie Triaxis
  43. Epiphone Galaxie 10 Power Transformer
  44. Dummy Loads??!
  45. 1970's Fender Princeton: No Sound
  46. How to not destroy pots when removing knobs???
  47. Ampeg Gemini II can cap values
  48. Delta Blues reverb op amp
  49. Help with Biasing a Bassman 5F6A
  50. Roc Pro 1000 stuck on disortion?
  51. Peavey Dual amp
  52. HiWatt DR201 Bias Problem
  53. Capacitor Failure
  54. Help for a complete new guy
  55. B-52 matrix 200 with no output.
  56. Sound Cuts From Marshall vs65r
  57. A power or volume drop on a Fender Supersonic
  58. Bad pots, Come on?
  59. What did I do wrong?
  60. Cornford Carrera - Crackling/hissing
  61. Mesa Boogie Duel rec. 3 ch. solo head with no power amp output
  62. Getting bias vltage from a non-centertapped secondary
  63. hartke 3500 power-on problem
  64. '84 Marshall 5005 Lead 12 power switch
  65. Tremolo Not Working-1972 Super Reverb
  66. fender stage 100 amp buzzing
  67. Laney becomes intermittent after two hours...
  68. Help with Carvin Legacy please - newbie
  69. Bassman 100 grid leak and bias Q's
  70. Hookup wire
  71. Noisy Princeton Reverb Clone
  72. Hot Rod Deluxe Master Pot
  73. Output wattage opinions?
  74. newbie help with marshall amp please
  75. '74 Pro Reverb with hum and reverb noise
  76. Removing powertubes and running
  77. Need Help with Fender Twin Reverb
  78. Power supply for a preamp
  79. need help with a resistor value
  80. Help with Marshall Please
  81. noise peavey classic 50
  82. Peavey XR 600E repairs
  83. nmv twin reverb vibrato
  84. Fender Twin-Amp Feedback
  85. Laney LC15 problem
  86. level dependant buzz/static
  87. 1964 Gibson GA17RVT "Scout" volume......
  88. Marshall 8004 Woes
  89. Trace Acoustic TA100R Schem.
  90. 1973 Princeton. Low volume.
  91. why is SFDR picking up more buzz than BF Bassman?
  92. Deluxe Reverb Stock Speaker Trouble
  93. Peavey Classic VTX
  94. Carvin BelAir - Low Voltage, Output, lot's of problems
  95. PREMIER AMPS B-160 and B-220
  96. My new Mesa Boogie Mark III Red Stripe
  97. Belgiums bitch
  98. Got a fender blues deville mexican, fixed a few problems but reverb feedsback bad.
  99. Marshall Haze 40C Tube 4 turns sign wave into hard very loud sq. wave to early,ideas?
  100. piezo preamp
  101. Vibro Champ not Vib-ing
  102. Deluxe Reverb Reissue Hum Issue
  103. Kustom 150 power supply 50% high
  104. Vibro Champ from parts... B+ voltage low, 155v
  105. Fender Footswitch trouble
  106. Amp Hiss
  107. AC30 TB/6 Vib/Trem Controls
  108. VOX AD100VT Troubleshoot
  109. plugging 8 ohm speaker into super reverb
  110. PV XXX channel sw problem
  111. Deluxe Reverb Power transformer - 0990761
  112. buzzing amp
  113. Mode Four smokin' but with real smoke!
  114. Ampeg SVT4-Pro Problems
  115. Peavey 130 Hum
  116. Crate Vintage Club 50 Head Is Hissing and Crackling
  117. trouble with ashdown evo2 300 and trace elliott gp7 amp heads
  118. Fender Squier 15 input jack
  119. Peavey Vypyr 15
  120. mesa problems
  121. Behringer ULM2000 microphone
  122. switch for an Ibanez TS9
  123. 5V4 in Champ
  124. Testing an output transformer
  125. CS800 Proper Schematic
  126. Hiwatt 200 problems
  127. Old Pro Reverb
  128. Help with output transformer
  129. Roland cube 100 guitar amp- loss of power
  130. Marshall g100rcd smoke checked?
  131. Is this "Crossover Distortion"?
  132. rattle in GT EL84s, again!
  133. Fender Showman output?
  134. Yamaha T100C
  135. Peavey Stereo Chorus 400 footswitch circuit needed.
  136. Marshall MHZ40C - Buzzing
  137. My Classic 30 DIED!!!
  138. Behringer GMX110 fried power amplifier
  139. Echoplex EP2 Hum
  140. How I "safely" use 2-prong amps until I change to 3-prong!
  141. Low voltages in 1972 Orange Graphic 80
  142. Need help! channel and crunch switch not working!!!
  143. need diagnosis help for dead amp
  144. Bridge rectifier issue...
  145. Mig-50 PI type parasitics after a few hours
  146. Fender Princeton Chorus
  147. Peavey Bass 400 m3 DC on Output
  148. Ampeg B-15T distortion
  149. Unidentified Model
  150. peavey 5150 sounds bad
  151. Vibro Champ Rebuild - Plate voltage high
  152. Bugera 333xl sounds bad suddenly
  153. Crate GTX212 Squeals on power up
  154. Crate PX-600 Whistles when turned off
  155. G1 amp in a Case
  156. Fender Frontman 15G 60hz Hum
  157. Peavey Vypyr 15 problems
  158. Carlsbro top 50 OT installation
  159. Help with Peavey Bravo
  160. Traynor Bassmaster Tubes
  161. Hum in DIY preamp
  162. Yamaha G50 112
  163. Sunn concert bass repaires
  164. NO sound out of 30 watt Peavey Delta Blues!
  165. Ruby EL84
  166. Quiet champ, blown OT?
  167. Need help yesterday
  168. Yamaha fifty 210, G50-210
  169. Diagnose a cheapo amp?
  170. Old Amp Hum
  171. Noisy presence pot
  172. Vintage Ampeg SVT troubles
  173. Trace Elliot SuperTramp Twin losing power
  174. Bassman reissue problem
  175. Gibsonette 6V6GT Biasing
  176. Traynor YGM-replaced filter caps/NF mod and now volume works strange...
  177. Fuzzy signal to speaker on Peavey Nashville 400
  178. Tube holder for Peavey Classic 30? Hmm, I wonder if there is suc a beast??
  179. Fender "The Twin" noise in channel 2
  180. help with Fender PD 150 Deluxe (Passport POS)
  181. Fender Reverb FR 1000
  182. Crate GT-50H Combo Amp
  183. Another Marshall MG50DFX with no sound...?
  184. Power Transformer Heat
  185. Glockenklang Soul
  186. Marshall MG250HDFX No Output
  187. Was given a Marshall MG 50DFX but no volume
  188. Marshall JCM 2000-DSL50 output issue
  189. Marshall Valvestate VS30- Hum/No Output
  190. Marshall 8080 - Lack of volume on boost channel.
  191. Shorted Transistors in a Crate PX-600DP
  192. encore 65 - problems/distortion/reverb
  193. Peavey 5150 has lost it's Gain... Help
  194. JCM 600 bias problem
  195. Amp tune -up?
  196. Mackie SWA 1501 fuse blowing
  197. Phase Inverter Test
  198. Please Help troubleshoot Vibroverb
  199. Yamaha G50-112II DC Board
  200. Hughes and Kettner Trilogy switching
  201. 67-68 Bandmaster
  202. Crossover part please
  203. Crate Vintage Club 50 causing fits
  204. SF Bandmaster L.F. Oscillation
  205. CARLSBRO GRX7 MIXER PA AMP INTERNAL FUSE BLOWS Help Please
  206. Audible oscillation while plugged into dummy load
  207. buying tube ?
  208. help with fender deluxe 90 dsp
  209. Fender Hotrod Deville prob.
  210. hum problem in swr basic black
  211. Super Champ XD Stuck On Channel 2
  212. Appreciat Diagnostic Help for Old Roland Orange Cube-60 Guitar Amp
  213. Help: Removing cap cans heavily soldered to chassis on Traynor YGM-3
  214. AVT150H Valve Replacement
  215. Vox JMI AC30 (1964) Servicing
  216. Schematic for Lexicon Signature 284
  217. Fender Deluxe 112 problem (cracking/popping)
  218. are my tubes matched or not ?
  219. dsl 401 no sound
  220. Orange Rocker 30 Head Case
  221. Half Tube Tremolo/Vibrato?
  222. Finding tube sockets with 1-3/8" mounting center
  223. Replacement diodes for Reverbojet rectifier
  224. Can I Super Glue A Loose Tube To It's Base?
  225. Fender 'Twin Amp' c2002
  226. Death cap
  227. AVT150H, fuse and resistors.
  228. Ticking in Princeton Reverb Tremolo...
  229. Hartke 3500 power amp module - any replacements?
  230. Bias current vs class op question.
  231. Fender Cyber Twin no master Volume
  232. Ampeg SVT 6 Mosfets
  233. capanalyzer 88 series 11
  234. Popping Fuses. Op-amp replacement question...
  235. help!(faulty behringer bx1200)
  236. bugera 333xl effects loop problem
  237. Hiwatt Classic 100 power section
  238. Dual Marshall Footswitch
  239. troubleshooting Fender 3016 amp
  240. Hot rode deville no sound
  241. The Marshall AVT50 R58 problem
  242. Sovtek Mig 50 shorted tube.
  243. microphonic chassis problem
  244. Peavey bandit 65 feedback problems
  245. Behringer vintager GM110 troubles
  246. Soundcraft GigRac 1000ST, major problems ? blown?
  247. Blinking Channel LEDs with side of noise
  248. Converting: 220 - 117V
  249. 1976 Fender Champ hums 60hz always
  250. SWR Silverado power-up problem