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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Peavey Bandit 112 TransTube
  2. Roland Studio Bass 100
  3. FENDER M-80 Chorus(chorus not working)
  4. Marshall JCM 2000 clean channel Help
  5. Metro 1987X build problems
  6. SVT 4 Pro gets low and distorted when loaded
  7. PV C30 Reverb
  8. Introducing a post overdrive tone circuit
  9. SVT4PRO won't run cold
  10. Princeton 112 plus potentiometers
  11. 5E3 clone with pos. voltage on the grids
  12. Marshall DSL tubby sound
  13. Need experienced advice on b-52 at-100 problem
  14. TAD EL84s in Peavey Classic 50
  15. Marshall Valvestate 15-Powers on..Low hum, no sound;sometimes amp works fine
  16. Where to buy old Fender knob
  17. Marshall MG100HDFX head wont turn on!!!
  18. Marshall JTM 30 conversion to 110 volts from 230 volts
  19. what type of variac to buy
  20. Trace Elliot acoustic amp with DC on pots
  21. crate GX-65 blows fuses
  22. Yamaha P7000S
  23. vox berkeley II 1081
  24. Rectifier for Sovtek Mig 50?
  25. i had an electric shock with my amp and my audio interface
  26. Washed the numbers off the knob!
  27. 10V Transformer
  28. What circuit is my Twin Reverb?
  29. Marshall 4212 OT Question
  30. Replacing driver transistors Lab Series
  31. Polytone Mini Brute II
  32. Marshall 8080 overseas voltage adaptation
  33. tda 7293 Remount Solution
  34. Line 6 Spider II amp no distortion
  35. Trouble installing VVR - Help please
  36. Distortion in Twin Reverb
  37. Peavey Max115 Bass amp fades away
  38. Divided by 13 head with issues
  39. DOD Bass Grunge FX92 issue
  40. marshall 4210 jcm 800 help!
  41. Ampeg B2RE limiter light-distorting
  42. Fostex A-8LR Tact Switches
  43. when inserting a current limiting R is very difficult
  44. Fender Twin Wierd noise from mid e.q.
  45. Ampeg SVT 200T Problem!
  46. Original Speaker Ohmage That Came With Crate CR-IIR
  47. OzValveAmps is back!
  48. Fender DeVille 212, low low power
  49. Marshall MG100HDFX blown TD7293
  50. ep-2 problem
  51. Very low output on '65 Ampeg Reverberocket R12-R-T
  52. Resurrected Peavey Triumph 60
  53. Marshall AS80R
  54. Eventually blows fuse
  55. help finding marshall pot
  56. Peavey Renown 400 Reverb problem
  57. Ampeg VL 502 lost all power...
  58. PT for a tiny supro SE amp from 1949?
  59. Fender Roc Pro 1000 Reverb Not Working
  60. Peavey Deca 700
  61. Fender Twin Reverb Sliverface - Speaker Noise
  62. Sub for 2SJ50/2SK135?
  63. Looking for replacement pot for Halfer LH 500 power amp
  64. Peavey M2600 Mark V no audio
  65. 90's JCM 900 hum on High mode
  66. Tube PT Troubleshoot
  67. Biasing Chinese EL84's
  68. Marshall AVT150h Input ???
  69. stumped; Fender pre-CBS Concert 6G12a trem issue
  70. Mesa Boogie Mark IIA not channel switching
  71. Peavey sc400
  72. resistor codes
  73. Behringer ACX 1000
  74. Silvertone 1474 Twin Twelve - PLEASE HELP !!!!
  75. 5150 ii...super bad feedback!
  76. Help with transistor sub
  77. SVT B-2r fan no working
  78. Houston area shop is looking to hire a repair technician
  79. Strange voltages across bridge rectifier
  80. Low Ghost Notes in a Tweed Gibson - Intermodulation Distortion?
  81. JCM800 blowing 0.5A HT fuse - could use some help please
  82. Peavey TKO 65 Bass Amp Noise
  83. MosFet Identity Help
  84. What is a reasonably priced 12ax7?
  85. HELP! Marshall MG100HDFX
  86. Randall RG-75D
  87. 1960 Bassman Weird Oscillation
  88. Ashton Viper 100 Head
  89. Filthy chassis
  90. reissue Bassman gut shots?
  91. Fender Twin Amp - Pro Tube Series
  92. Fender Dlx Rev PT
  93. Intermittent hum issue with Frontman 15G
  94. Marshall AVT100
  95. Identifying Bias Resistor In 60's Ampeg Jet
  96. Peavey classic vtr problems
  97. Marshall JTM / JCM600 PSU Caps
  98. Domino Resistor Question
  99. Marshall G100R CD Power Supply Resistors
  100. Fixing an Epiphone SoCal 50
  101. fender twin reverb low thud
  102. Behringer BX4500H, hum (not DC), no signal
  103. Oldy butta goody
  104. Trouble shooting
  105. Super Twin Reverb
  106. Moist Filter Caps?
  107. Are my speakers beyond repair?
  108. Carvin X-100B Buzzing
  109. AC30 TBR noisy phase splitter
  110. SNAKES!!!
  111. peavey channel cuts out at volumn under 7
  112. Marshall JPM-1 pre amp battery replacement?
  113. I've been reading about using a light bulb limiter
  114. More JC-120 woes
  115. Johnson JA-40WT Footswitch
  116. A multitude of tube questions
  117. bad hum Blues Junior
  118. Screen resistor question
  119. Marshall AVT 100 foot pedal cable
  120. 5E1/5F1 Death Cap
  121. New amp build, tons of issues...
  122. Fender Frontman 25R Channel Problem
  123. Blues Junior Humming
  124. Champ 5e1 sounds like an analog synth...WTF?!
  125. GK 400RB III no bias voltage
  126. Marshall Avt150H
  127. Marshall vs 100 head
  128. Sovtek 5881WXT bias
  129. HT-5 Clean Channel problem
  130. Blew out my Crate??
  131. Peavey Pacer problems
  132. Fender Rhodes suitcase model fr7054 is oscillating
  133. reforming caps.
  134. randall rc75d
  135. Crate GFX 212 cutting out
  136. Anybody know of any good books or info on electronic repair to buy or download
  137. Bugera 333xl 60htz buzz
  138. Help for a VOX solidstate
  139. too much preamp gain in my ampeg v2?
  140. 6eu7 to 12ax7
  141. Ugly octave sound
  142. reverb transformer
  143. Fender Super 60 - how to get the board out?
  144. Peavy backstage
  145. Marshall AVT150H No lights no fans no Sound... need your Help
  146. Ampeg v4 tubes glowing red
  147. JCM900 4100 Problem
  148. Ampeg vl 502 got really quiet all of a sudden...
  149. Change speaker impedance??
  150. fender twin amp volume surge in effects loop
  151. Baldwin C1 amp Fuse size
  152. Johnson 40W tube amp combo
  153. Peavey kb/a 100
  154. Ampeg Reverbrocket R12R No Tremolo
  155. Ampeg B2 Combo Explodin'
  156. AC30 Top Boost Pulsating Tremolo??
  157. Peavey Bandit 112 powers up no sound
  158. Getting inside my Behringer acx1000 amp
  159. Could someone tell me what a cross for a "Reverb Pan type M" would be.
  160. Distortion channel trouble, B-52 AT-212
  161. discounted SED factory seconds
  162. Marshall TSL100 head model year 2001
  163. JCM 800 loud cracking sound
  164. Vox V1143 Super Beatle schemo
  165. Mesa Lone Star Screen Grid Resistor Values
  166. Quasi Complementary Output Stage Design Question
  167. 12ax7 - 334V schem says 185V ???
  168. Aluminium TO3 insulators??
  169. Deluxe Reverb Buzz
  170. Wanted to get some advice about starting reconing at my amp shop. Good idea?
  171. Crate v18 Catastrophe
  172. Fender Bassman 300 whats the b+ voltage?
  173. Lab Series enigma
  174. Fender Princeton 65 dsp Distortion channel cutting in and out.
  175. marshall jcm3210 mosfet - gain pot w/pull switch
  176. The Twin jack
  177. Embarassing question about tube retainers.
  178. Fender 75 wont go low?
  179. Roland cube 60 broken lead channel.
  180. JCM900 4500
  181. Replaced Power Caps but Now No Clean Channel
  182. Ampeg ba115 blows fuses
  183. Gallien Krueger 1000RB Oscillating
  184. Crate Stealth GT50 doesn't have any Vol on Dst channel
  185. f^*%ing Blues Jr
  186. Ripped Cone repair method
  187. Silverface Bassman 135 Ext Spkr jack...?
  188. Loud hum and blown fuse
  189. AVT150HXT Marshall head, wont play lows
  190. IIEEEE! Is this thing glued together??
  191. Behringer PMP5000
  192. Identify Parts Please...
  193. Is this a dead output transformer?!?
  194. mt54
  195. cathode resistor and cap, SFTR vs AB763
  196. F6.3l fuse
  197. Marshal 5213 Mosfet
  198. Super Reverb weak vibrato
  199. Loss of Gain in a Crate V1512
  200. Need help fixing simple SWR Triad speaker wiring
  201. How to bias an Ampeg Gemini VI gs15r
  202. VOX VT 50 crackling
  203. Ampeg B18-N Output Tubes Run Hot
  204. 65 Twin Reverb RI Reverb Noise
  205. 65 Twin Reverb RI Reverb Noise
  206. Blues Jr reverb problem?
  207. Blues Jr. Reverb Buzz
  208. Help needed with a TSL 100 head !!
  209. DeVille bias pot problem
  210. Tone Stack Calculator - Traynor
  211. AC15 has output but no sound...
  212. Mesa Lonestar special - whooshing sound
  213. Peavey Nashville 400
  214. Earth bassman 4x12 Low volume/dirty tone issue
  215. Kustom K150-5 PA no reverb
  216. Re-capping Gemini I question
  217. peavey PA 120
  218. Tube type question?? Vox
  219. Electrolytic cans voltage ratings...
  220. A Problem with the old model c?, Peavey cs800 power amp Loud Popping
  221. Source for A1M 12MM miniature pot
  222. Behringer GMX110 volume issue clean vs dirty
  223. Need Help Fender Acoustisonic
  224. red plating?
  225. "Non-serviceable" Fender amps
  226. Acoustic 150B in horrible condition
  227. Weather Strip?
  228. Marshall fuseholders
  229. moving to the USA
  230. Vox VT50 volume dependent hum?
  231. peavey tnt 130
  232. Marshall Mosfet Lead Output Stage Problem
  233. Mesa Boogie MKIII blowing fuses
  234. Looking for Fender Frontman 212R B 50K Pot
  235. Cold bias on Epiphone Triggerman
  236. Buzz
  237. Deoxit
  238. Twin Reverb - help with troubleshoot
  239. Fender Blues Deville 1994 - Cutting Out
  240. Hartke 3500 distortion in preamp
  241. heater wire for a Kalamazoo reverb 12 I just got
  242. marshall 6100 trouble
  243. Fender Super Sonic Effects Loop Issue
  244. Hello Classic 30 question.
  245. Setting bias on a Ampeg SVT 4 Pro
  246. Cap Replacement...Which caps to use
  247. Lonestar Special 5w & 15w fade out
  248. Marshall DSL 100, loudspeaker out, 16 ohms ok but parallel 4,8 ohm no sound
  249. Lab Series L4 Bass Head 200 watts, IC sub for CA3094ae Op Amp
  250. Popping/Crackling Blues Jr on Startup