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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Audible oscillation while plugged into dummy load
  2. buying tube ?
  3. help with fender deluxe 90 dsp
  4. Fender Hotrod Deville prob.
  5. hum problem in swr basic black
  6. Super Champ XD Stuck On Channel 2
  7. Appreciat Diagnostic Help for Old Roland Orange Cube-60 Guitar Amp
  8. Help: Removing cap cans heavily soldered to chassis on Traynor YGM-3
  9. AVT150H Valve Replacement
  10. Vox JMI AC30 (1964) Servicing
  11. Schematic for Lexicon Signature 284
  12. Fender Deluxe 112 problem (cracking/popping)
  13. are my tubes matched or not ?
  14. dsl 401 no sound
  15. Orange Rocker 30 Head Case
  16. Half Tube Tremolo/Vibrato?
  17. Finding tube sockets with 1-3/8" mounting center
  18. Replacement diodes for Reverbojet rectifier
  19. Can I Super Glue A Loose Tube To It's Base?
  20. Fender 'Twin Amp' c2002
  21. Death cap
  22. AVT150H, fuse and resistors.
  23. Ticking in Princeton Reverb Tremolo...
  24. Hartke 3500 power amp module - any replacements?
  25. Bias current vs class op question.
  26. Fender Cyber Twin no master Volume
  27. Ampeg SVT 6 Mosfets
  28. capanalyzer 88 series 11
  29. Popping Fuses. Op-amp replacement question...
  30. help!(faulty behringer bx1200)
  31. bugera 333xl effects loop problem
  32. Hiwatt Classic 100 power section
  33. Dual Marshall Footswitch
  34. troubleshooting Fender 3016 amp
  35. Hot rode deville no sound
  36. The Marshall AVT50 R58 problem
  37. Sovtek Mig 50 shorted tube.
  38. microphonic chassis problem
  39. Peavey bandit 65 feedback problems
  40. Behringer vintager GM110 troubles
  41. Soundcraft GigRac 1000ST, major problems ? blown?
  42. Blinking Channel LEDs with side of noise
  43. Converting: 220 - 117V
  44. 1976 Fender Champ hums 60hz always
  45. SWR Silverado power-up problem
  46. Crate V-33 Do any of these last?
  47. Help with IORIO amp problem/output tranny?
  48. Evans amp schematic ?
  49. Lord Valve where are you?
  50. "Blows Fuses" and "Is my transformer dead?"
  51. Marshall AVT 50x OD channel problem
  52. SWR Bass amp fan issue
  53. Speaker Ohms Question
  54. AMpeg SVT-CL Unholy Noise
  55. Crate Vintage Club 50, Input Jack Issues?
  56. Peavey Stereo Chorus 212 Schematic?
  57. ID this part ?
  58. Danelectro DM10 thumping
  59. Ampeg SVT 4 T schematic??
  60. HELP with wiring a Teisco Checkmate CM-10
  61. Old Fender fiber boards
  62. Old Fend. Transf. Primary Colour Codes
  63. Configurable Dummy Resistor Load Box for Amp design/repair
  64. Amp trouble
  65. Schematic Request Peavey Envoy 110
  66. Connecting a 110V amp to 240V - possible?
  67. B-15 Crackle
  68. faint signal at zero volume
  69. Hot Rod Deluxe - Mystery
  70. Help the newbie with an Encore 65, distorted
  71. Acoustic Control G100t
  72. 66 Vibro Champ needs some help
  73. Video of hum when I switch on the reverb of my Twin Amp
  74. New power transformer issues
  75. Crate BV120H bias?
  76. varistor touble
  77. Crate Palomino v16 Schematic?
  78. PV classic 30 PT?
  79. Sunn 300 T Bias / Balance issues
  80. Marshall JCM2000 has no sound
  81. JCM 800 2205
  82. Mesa Boogie Formula Pre - Relay
  83. Fender cab question
  84. B+ to high on homebrew
  85. Roland JC120
  86. peavey VB2 schematic
  87. Another peavey 400 bh problem
  88. Ampeg B2 Voltages
  89. Fender 'Twin Amp'
  90. Marshall MG 100HDFX-Clean switching?
  91. Line-in confusion
  92. 1968 Duo Medalist switch issue
  93. Vibro Champ Heater Wiring
  94. Amp troubles!
  95. Randall RG200
  96. Where's the best place to buy filters, caps, etc?
  97. Replaced V1 plate resistor, now I am getting squealing
  98. '79 JMP 50. Old tubes cause low bias voltage?
  99. Fender SK 100B pre amp section out
  100. marshall tsl60 switching problems
  101. Your thoughts on Filter Caps.
  102. Mesa Boogie .50 Caliber Amp - Low Output On Overdrive Channel
  103. MIG100 - Replacing output jacks
  104. Crackeling Peavey Classic 50/50
  105. TSL 602 'Squawking'
  106. Gibson GA42RVT repair issues
  107. Blue glow on the inside glass
  108. 62 Ac30 Distorting :(
  109. peavey delta blues ?
  110. Marshall AVT150H channel switch popping
  111. Rivera K-tre too loud and hissing
  112. yamaha G50-112II
  113. Peavey XR1200 Repairs In Progress - Help Requested
  114. Ampeg B-2 Fan Trouble
  115. '67 bandmaster - intinsity pot for tremolo doesn't start working till about 5
  116. crate gfx-212 - bad input?
  117. G1 amp in Case
  118. Rectifier path of travel
  119. Marshall Valvestate 8080 big noise when starting up
  120. Mesa Stiletto problem
  121. Marshall Mode Four
  122. Ampeg SVT 5Pro Schematic
  123. Radial Headbone
  124. Anybody got a gut shot of a Gibson Ranger GA20?
  125. Mesa Boogie 50 Caliber + red plating
  126. Ampeg SVT 4 Pro curcuit breaker
  127. Ampeg BT25
  128. classic 30 with low volume and odd sounding distortion
  129. PV XR400b mixer/amp with 200 H power module low output
  130. Sunn Beta Lead power transistor
  131. Problem with a Mesa Boogie Dual Recifier
  132. mesa boogie 3 channel triple rectifier switching channels by itself , other noise
  133. FRED Diodes For A Kustom 200B?
  134. SF 135Watt: Dropping the B+ voltage, and bias mod
  135. Silly Questions from a Twin Reverb owning DIY Newbie
  136. Need a little help with a Laney Gh100L
  137. Broken amp, need diagnosis help
  138. Roland Jazz Chorus 120 "Schematics needed asap"
  139. Fender Princeton 65 DSP - Low Volume and Hiss
  140. Dead Vibrato: Fender Twin Reverb Reissue
  141. Reverb issues w/ a Peavey Classic 30
  142. Post In Music Electronics - Link
  143. help with a Kustom 200B
  144. Valvestate 8080 issues
  145. ill amp 'crackles' into speaker ?
  146. Acoustic Model 123
  147. Motorboating issue
  148. Fender Acoustasonic II SFX problem
  149. Hartke 3500 relay problems?
  150. VOX AC30/6 TB scratchy static noise
  151. Help ID a Mains transformer for 135W Twin
  152. Signal tracing rules
  153. Fender Hot Rod Deluxe won't play!
  154. Hot Rod Dlx Fizzy artifact!
  155. need help fixing my fender fm 212r
  156. almost a 6G6 build
  157. Tech-Caps???
  158. Crate GLX65 Question; Working Amp w/ no Sound from Speaker
  159. Marshall DSL 2000?? SO confused!!
  160. re:Peavey XR600B
  161. Taking the next step in my builds and repairs.
  162. Swr la series chirps on power up
  163. Tonefullness of one cap over another
  164. Low V supply issue Firebass 700
  165. LANEY VH100r Power tranformer buzz fixed ...
  166. Polytone - blown power transistor
  167. wave -like sounds
  168. marshall avt 150 h
  169. Crate GX-15R doesn't work - Any ideas?
  170. rca soldering
  171. Deluxe Reverb Mod or mix-up?
  172. Fender Twin Hum Hum Hum
  173. Major goof, major problem OT
  174. Crate V50 ?
  175. Ampeg SVT5 Pro
  176. High-Frequence Noise at Roland Bolt-30
  177. What Reverb Tank for a Yamaha Fifty 112?
  178. Power Amplifier Repair
  179. Problem with Fender Princeton DSP
  180. Peavey VTM 60 Blows fuse
  181. clean channel gone on my little Fender Champ 30 - fixable?
  182. Ampeg SVT 5 Pro
  183. redplate/biasing issue
  184. Behringer GMX212
  185. Amp/Guitar Temperature Sensitivity
  186. fizz and oscillation in Peavey Rockmaster head
  187. Classic 50 tube biasing?
  188. i have damaged my Crate VFX,please help..
  189. 6G12-A Concert clone behaving oddly
  190. Roland Cube 60 -- missing reverb
  191. Peavey Heritage VTX Series
  192. Blues DeVille reissue squealling preamp
  193. Substitute GZ34 for 5U4GB?
  194. Princeton Reverb Re-work
  195. No sound from speaker..?
  196. AC at pin 8 on a 6V6
  197. Pot replacement....I got "shafted"
  198. Keeps blowing the fuse
  199. Blues deluxe..same ole' problem
  200. Color coded capacitor
  201. Miscellaneous Question About Amp Damage
  202. Weber 6a14hp buzz when reverb is on.
  203. line 6 flextoneII hd head problem
  204. Ultimate Chorus
  205. Guitar Research T64RS TUBE
  206. Roland Bolt 60 reverb tank?
  207. Fuse Pops - Transformer Dead
  208. Orange rockerverb owners?
  209. Lafayette (or Univox??) U-80A mystery amp
  210. identify a transformer
  211. Bassman 100 - Should it be louder?
  212. Super Champ XD
  213. Amp Tech Needed in So Cal...
  214. Fender Princeton Chorus problems
  215. Marshall MG100dfx
  216. Marshall Super lead 1959 Problem
  217. JTM45 Build Buzz Problem
  218. Svt 4 pro tubes??
  219. Question about Marshall Valvestate 8100
  220. Marshall JMP 50 watt bias
  221. Traynor yvm-1 voice master acting funny - - -
  222. Fender Concert II problem ( preamp)
  223. Sticker on power tubes? Harmful?
  224. Need pot volume control for op pro preamp Ovation Guitar
  225. Marshall AVT150 Blown Fuses
  226. Diodes for a Twin
  227. Hiwatt Classic 50 Crackling when cranked
  228. NOS 6L6 vs Currently made 6L6
  229. More failed Jamicon 12,000u 80v
  230. Fender Super Reverb AA763 Bias
  231. marshall 8080 pot problems
  232. Need help with Fender Twin Reverb
  233. Vibrolux low volume
  234. Slightly off topic, but strange
  235. High voltage on pin 1 of V5 in '67 Super Reverb
  236. Powering vtl5c1 from heaters on SLO 100 ?
  237. Fender Twin loud reverb hiss
  238. Awful noise from Fender Bantam Bass
  239. power noise parkg10r amplifier
  240. HomeBrew Troublshooting Help
  241. Silvertone 1484 help needed
  242. PEAVEY BRAVO 112 crunch channel bad switch?
  243. 78 Crate CR-1R, 72 Gibson G20, 2006 Randall RG 100 G3 100 watt valve dynamic
  244. Ampeg svt cl hum issues
  245. Polytone Mini Brute lll, lV, M-PA
  246. Need help trouble shooting peavey xl-500 mix amp
  247. Serious ?grounding? problem - kind of scary...
  248. Silvertone 1484 diode substitutes
  249. Trouble with Peavey Backstage 110 amp
  250. '67 Ampeg Jet, no trem & high voltage