PDA

View Full Version : Maintenance, Troubleshooting & Repair



Pages : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 [33] 34 35 36 37 38 39 40

  1. Counterfeit pwr x-istors
  2. 2uf 25v Caps
  3. JMP-1 Midi Trouble
  4. Mesa Dual recto Questions
  5. Schematic for a Guild Thunderstar Bass Amp 1969... Please..
  6. standby light stays on
  7. 16/32uF 475v Caps?
  8. Sovtek mig 50 issues ?
  9. low frequency buzz from speaker
  10. SF Champ lost headroom
  11. SWR Workingman's 10 and TDA7293
  12. Ampeg SVT-4 schematic anyone?
  13. Ampeg transistor?
  14. Fender Princeton 65 DSP Problems ???
  15. What would you do with a CBS 70w Super Reverb?
  16. a bunch of hiss in preamp
  17. Fender HR Deville Issue
  18. SPDT channel switch pops
  19. Jumpy master volume
  20. Valvestate 8280 shorting problems, need troubleshooting help
  21. Chorus weirdness.....
  22. could someone help me out?
  23. Improving Halfwave Rectifier Question
  24. OT transformer feeding back
  25. jcm800 clone with noise
  26. dirty dusty amp chassis and circuit.
  27. Help debugging my mesa boogie studio preamp
  28. Marshall VS100 Combo Cutting out after a few minutes
  29. Kalamazoo Model One failure...
  30. Peavey Butcher dead
  31. Valve Junior-intermittent cutting out
  32. Messy bogie DC3
  33. Fender Bass Amp Blues
  34. quickest/easiest way to test zeners?
  35. Silvertone 1466 schematic?
  36. Ideas on '67 Bassman problem......
  37. Peavey Deuce schematic?
  38. Roland Cube60
  39. Laney Pro Tube 50 (lead) schematic
  40. Fender deluxe 90 prob....any fender techs?
  41. Rewiring US Marshall for Europe
  42. Scorpion Lead Amp - Cap Replacement
  43. what is the fuse value for the mode four (mf350)
  44. Marshall JCM2000 TSL100 Noise Issue
  45. valvestate 8080 reverb
  46. Output Transformer Question
  47. Peavey
  48. Marshall mg100dfx resistor value r8 & r20
  49. marshall VS265 - high pitched noised at high volumes
  50. Peavey Studio Chorus 210
  51. Fender Deville cathode diode
  52. Filter cap question
  53. Winged C SVEL34
  54. testing transistor temp sensitivity
  55. Marshall MF350 Mode Four - No power up
  56. location of 3rd wire
  57. Spray painted Gril Cloth
  58. Dead Marshall MG100
  59. Kustom K200B-4 hisssssssss
  60. Ampeg B15 oscillations at high volume
  61. Peavey Butcher 6l6 to El84
  62. Plate voltage w/ tubes in
  63. output transformer wiring
  64. replacing power cord strain relief
  65. Peavey PA-400 schematic
  66. Ampeg GV-22 1968 vintage restoration
  67. TNT-100 Repair Problem 2
  68. Marshall VS100 blowing fuses
  69. Hartke HA-3500 Troubleshooting - Bass Amp Crackles & Pops
  70. dummy math question capacitance
  71. Stage 112 cuts in and out
  72. Orange Rocker 30 Schematic
  73. Blowing Fuses
  74. Carvin PB 150 FETs
  75. JCM 900 problems
  76. hiss from output/power amp
  77. Old Elk Viking Amp Head Scratcher
  78. Carvin Legacy help needed
  79. Peavey Classic 30/Smack it to power up
  80. Marshall VS65R Problem
  81. Powering up with a variac
  82. question about bias cap values?
  83. Genz Benz: red or black?
  84. bias caps: Sprague Atom or Xicon?
  85. Vibrato LDR
  86. Pic of turntable stand
  87. Transformerless Amp Safety
  88. Mesa Boogie Lone Star Hum Please Help
  89. crate vc5310 problem
  90. peavey classic 50 410-poping,cracking
  91. PI anode resistors
  92. Marshall TSL-601 - Quiet Volume
  93. Mesa Mark IV schematic help
  94. Bad Choke?
  95. Ampeg SVT6PRO question
  96. Marshall Valvestate reverb problem
  97. Ampeg Gemini 6 GS-15R Blowing Fuses
  98. Electrical Interference or Arcing?
  99. Twin-Amp biasing
  100. Bassman - no headroom
  101. trouble wiring up heaters
  102. Fender Performer Problems.
  103. H&K Triamp MKII question
  104. Magnatone 460 output impedance
  105. Sound City PA50+ low volumen...
  106. sparked bias supply, dead.
  107. Peavey Classic Head
  108. Mesa MK I RI Tweaking
  109. Trace Elliot C100 Speed Twin Trouble
  110. Burning smell...
  111. Ampeg V4 Troubleshooting Help
  112. EL84 Acceptible load range (Single Ended operation)
  113. BF Super Reverb Question
  114. rating power MosFets?
  115. twin amp red light
  116. Bassman PI resistors
  117. 120 Hz Hum in Solid State Amp
  118. Vox AD15VT sound problem
  119. bedrock 1200 Questions
  120. Crate Turbo Valve 60 help
  121. Problem with Ampeg B1RE
  122. Marshall MKII schematic
  123. Sovtek MIG 50 help please
  124. Excessive hum
  125. Old Peavey TNT 100 SS Series Has Low Distorted Output
  126. Marshall MF350
  127. New Guy With A Question.....
  128. Orange Rockerverb Noise Problem
  129. Peavey Classic 50 212 wierdness
  130. jc120 speaker wiring
  131. Strange Feedback with medium/high gain
  132. Troubleshooting motorboating
  133. B-52 At100 Head Repair HELP PLease!!!!!!!
  134. Fan noise
  135. Laney LC15 Volume Fluctuation, Suspect Pots
  136. Need a 5/10/20 Cap for Silvertone
  137. HH VS Series schematic
  138. Turntable service stand - a little off the forum
  139. EL34 reliability mod
  140. What can cause spring reverb tank to fail?
  141. Fender Dual Showman Reverb Problem
  142. Power Transformer testing? (kinda long)
  143. Fried J & Hyde
  144. Ampeg VT-22 slight mishap
  145. Marshall JTM60 Trim Pot Location
  146. 6FQ7 phase inverter
  147. B+ fuse killer
  148. no sound
  149. Tremolo all bunched up
  150. phase inverter in the 30th anniversary
  151. Marshall JCM2000 DSL50 hum
  152. Fender opto isolator "roach" which end is which?
  153. Peavey Classic 50/212 ... Standby Issues!
  154. Trace Elliot Velocette 110
  155. twin reverb trem not working
  156. Fender stage 100 ? very weak dist sound
  157. Ampeg 7027A Power Tubes Replacement Blues
  158. TSL100 Bias Problems
  159. Mesa Triaxis Memory Loss
  160. Circuit Board issue!!!!!
  161. 65 Deluxe reissue pots
  162. Adjusting BIAS in Sovtek Tube Midget 50H Head
  163. annoying hum
  164. Peavey Classic Dual Death Cap Question
  165. Biasing a Fender Blues Junior Question
  166. Peavey Bandit Reverb Issue
  167. 1973 Marshall
  168. Fender Pro Junior: Problem or Normal? Help!
  169. Hafler T2 Tube Preamp
  170. Please Help Marshall Tsl Problem
  171. 1979 Peavey Bass 400 MarkIII
  172. Fender SRRI Can't Bias Hot Enough
  173. Marshall JTM60 Output mystery??
  174. Fender "The Twin" Schematic
  175. Hartke 5000 help ?
  176. Combo or Head/Cab?
  177. Panel meter wiring
  178. Buzzing Blues Junior
  179. Marshall valvestate 8080 how to get more reverb
  180. Peavey Classic 30
  181. Vibrolux Reverb Bias?
  182. SFDR w/ MV has very low output volume...Any ideas?
  183. weird thing happens on opamp
  184. Marshall Valvestate vs100 Problem
  185. Silvertone 1474 questions
  186. What size fuse to put in O.T. center-tap?
  187. Ampeg B2 RE
  188. Setting the Mosfet bias on an Ampeg SVT 3 PRO
  189. Biasing with a "BiasProbe" basic
  190. Avt275 powers up but no sound
  191. Speaker loads
  192. Motorboating vibrato circuit
  193. Help! My amp sounds like a ring-modulator.
  194. Mesa Nomad 45 unbearable hum
  195. Shorted output leads
  196. Ampeg reverb squealing
  197. Microphonic Capacitors??
  198. SVT Classic Fan Question.
  199. Ampeg J12-B Tremelo Whoosh
  200. Peavey 6505 bias mod
  201. fender stage 112
  202. While I am at it, I might at well..........
  203. 69 Bandmaster reverb -oh the crackling noise!
  204. Marshall AVT 100 Problems
  205. Tsl 100 help
  206. checking for a bad diode
  207. No sound immediately when switched to standby
  208. Hammond M2 Repair & Restoration--help!
  209. calculating output power
  210. Repairing a Bl@nkenshib
  211. Too much B+ for the poor tubes.
  212. carvin XV-112E problems
  213. Marshall 50 Master volume with tropical fish cap?
  214. waveforms
  215. Weird reverb problems in tank? I'm baffled
  216. How much power amp affects tone
  217. SWR PB-200, What gives? Help!
  218. What's the vox pathfinder ic?
  219. Marshall parts
  220. Marshall TSL122 grid resistor values?
  221. Very low B+ in BF Vibrolux reverb
  222. Peavey Mace Problem
  223. 1974 Quad Reverb Trouble
  224. Marshall AVT50 - burned R58
  225. VOX AD60VT Question
  226. Need help with my LANEY
  227. Volume on zero, still sound?
  228. 5E3 weird distortion problem
  229. Laney rbg500 blow out
  230. SVT-4 Pro output relay
  231. Need achematic for Crate BV120H
  232. Blown OT??
  233. Traynor Monoblock schematic
  234. deluxe reverb broken
  235. Sunn 200S drawing too much current at idle
  236. blackheart strange volume control
  237. Old Peavey bass amp
  238. Yorkville Traynor Guitar Mate YGM-1
  239. Marshall DSL100 bias creep
  240. Ampeg J-12B
  241. 61 Ampeg Badge
  242. Source for d shaft pots ?
  243. Silverface Twin Reverb Blackfaced with Scratchy Buzz
  244. Schematics, Adobe, and you
  245. Marshall MG100HDFX - TD7293
  246. Marshall DSL401 Enzo???
  247. Jazzmaster schem?
  248. Fender Noise !
  249. Loud Sqeeel When Turning Amp Off
  250. Marshall AVT100 combo buzz/humm