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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Capacitor Plague- Industrial Espionage Incident Ends in Manufacturing Catastrophe
  2. Fender Hot Rod Deluxe hum
  3. sorry.. deleted
  4. Help with ID of a power transformer...
  5. Line 6 Spider Valve 112
  6. Traynor YGM-1 trem clicking
  7. Traynor YGM-1 trem clicking
  8. Sloclone..hums like h...
  9. fender frontman 212 distorted output
  10. 6L6GC from TubeDepot, PSA and questions.
  11. Silverface Champ making noise when played...
  12. 5E3 scratchy sound
  13. Blues Jr 3 Texas Red
  14. Using the oscilloscope
  15. Can this amp be fixed?
  16. First trip to tube amplification.. That's broken.
  17. Peavey classic 50?
  18. Princeton Supply Side Economics
  19. 3 Prong Conversion On Solid State Amp and advice on Output Transistors?
  20. THD Flexi 50 Repair. Any advice appreciated.
  21. Fender amp cabinet grounding foil replacement material
  22. Kustom Defender 112 DC Filaments
  23. Traynor YCV40 Strange Vibro Sound
  24. Fender Twin 135 Watt with on/off master volume switc (6L6X4)
  25. Blackstar Stage 60. No sound
  26. sunn concert lead trips circuit breaker
  27. damn, that's a shame!
  28. The dreaded Acoustic G100/60T channel switching problem
  29. Early 60's Ampeg Reverberocket: need help with noise
  30. Peavey TNT-100-79
  31. Trace Elliot GP7SM 130
  32. SE5a power transformer help?
  33. valve king 100 died mid set
  34. Vox AC100CPH Reverb Problem
  35. Gallien-Krueger MB150S III resistor values
  36. Bogner Shiva blown supply protection components
  37. Valvestate 8200 volume fade
  38. Sunn oscillation?
  39. Yamaha PSRS 650 keyboard
  40. Reverb on Twin Reverb Reissue stopped working while playing
  41. Hotrod Deville Fuse Size
  42. Power fuse mod
  43. Rickenbacker TR35B....low distorted output
  44. Peavey Classic 30 oscillating
  45. 5F10 Fender Harvard Clone Pulsating (HQ Video/Audio Included)
  46. Peavey JSX problem
  47. desoldering double sided boards
  48. Blackstar Head pots scratchy
  49. Behringer gmx212 problems with volume knob
  50. Quick question about BJT transistor
  51. Another Champion 600 help thread
  52. Dynacord powermate 1000
  53. Fender Super Champ X2 smoking resisitor
  54. teisco checkmate 50 power switch
  55. A.R.T. Voice Channel Mic Pre (Rack Mount)
  56. Fender 68 Custom Deluxe Reverb
  57. Fender Hot Rod Deluxe
  58. BUGERA 333XL randomly shut off PLS HELP
  59. Knight 400 tube checker
  60. Looking for unusual jack from Epifani amp
  61. Looking for 8 pin tube socket adapter that can be dismanteled
  62. Looking for alternative to Peavey dual diode SZ-13886
  63. Fender Silverface Super Six Recap Job
  64. My Latest Score - 1974 Silverface Vibro Champ
  65. Sano 300R Tremolo Problem
  66. What insures voltage balance on stacked pairs of PS Filter Caps?
  67. Is this possible?
  68. Phase inverter tail resistor burned/smoke
  69. Carlsbro Marlin 6-300 Mk II
  70. New 2203 Hum Balance
  71. Marshall JCM2000 DSL Superlead 100 DSL - PWR Transformer Shorted?
  72. M Taper or Special Taper pot question
  73. Phonic Helix 24 Firewire Mk 1? " Firewire issue "
  74. Blues Junoir reverb dead
  75. Rectifier voltage shifting when standby switched on
  76. Sub for BA 4560 opamp
  77. Blast from the past... Flo-a-tone
  78. SRRI one output tube inactive
  79. Session 400 again and again
  80. 1974 Celestion Creamback with a 70s Waldom recone question
  81. 1981 Peavey Special combo amp question about filter caps
  82. MG100 HDFX no power HELP!!
  83. Park 75 Bass Amp Biasing Question
  84. Center-tapped pots?
  85. Ghost notes or what? (video)
  86. ANOTHER dead valvestate !
  87. Mackie SWA 1801 Service Notes
  88. Blues Junior distorted and low volume
  89. Behringer Euro Live B1800D PRO 18" subwoofer help SMPSU28 and P0981 pcb's
  90. PV Session 400 LTD...again
  91. stereo/mono cab wiring jacks?
  92. Swr 750x pre-amp problem!
  93. Behringer BXL1800A problem
  94. AC Voltage Measurement - Hum Reduction
  95. Ground Loop???
  96. Would You Guys Replace This OT?
  97. Marshall Preamp
  98. Fender FM65R distorts after 1/2 hour
  99. Peavey special 130 pop on clean channel
  100. Carvin Legacy (105 hz hum?)
  101. Sunn Concert Bass shutting off
  102. Vox AC 30/6 TP Potentiometers Supplier
  103. Fender blues deville foot switch problem......
  104. Gibson Invader red plating
  105. Marshall B150 -56vdc on speaker output
  106. Blackstar HT-5 barely any output
  107. 3 prong on tube tester?
  108. Egnater Rebel 20
  109. peavey kb300(nothing)
  110. Fender Stage 100 transformer wiring. I think I hooked it up wrong.
  111. Peavey Vyper 15w Modeling Amp only works through headphone jack
  112. Looking for Ampeg socket
  113. '65 Fender Deluxe - One 6V6 cherrying and I'm stumped
  114. Tube tester shot craps?
  115. Peavey Bass-Fex battery type?
  116. Help me with OLD tube amp!
  117. Super Reverb Volume Controls won't Silence the Guitar
  118. Looking for Ampeg SVT CL resistor
  119. Weird feedback---Crate
  120. Peavey Rockmaster Preamp Static Sizzling Noise
  121. cant find parts???
  122. Ampeg B100R Static Under Notes
  123. hartke 3500 troubles
  124. Randall RH200 strange noise??????
  125. Behringer pmp4000 blinking lights no sound
  126. Hot Rod Deluxe Caps - replace all at once?
  127. Laney TF 300 tone problems...
  128. Hot Rod Deluxe issue
  129. Need help determining ratings for rectifier diodes on a Supro S6625
  130. Crate VTX212 Loud Hum Whe Instrument Plugged In
  131. B212D Schematic Needed
  132. Univox U-1075 PA amp
  133. PV ValveKing Combo dead
  134. microphonic EH KT90's
  135. Bugera 6260 changing stock tubes to JJ 6L6's
  136. Output Transformer Impedance Verification
  137. Hot Rod Delux repair/mods
  138. Peavey TNT 150 Hum Problem
  139. Yamaha G50 112
  140. Phase inverter tube?
  141. Peavey Ultra plus quiet on crunch and ultra channels
  142. Hiss/Crackle in a Marshall 1959 Super Lead head from 1969
  143. Sovtek 6L6WXT
  144. Yamaha g50-112 II troubleshooting
  145. Polytone 103 Reverb Problem
  146. Marshall valvestate 8200 bi chorus problem!
  147. Mesa 2:90 power amp channel B distorted
  148. Here's a good one.. Ruby Tube quality fail.
  149. 1961 Supro 1624T Low Volume Issue. Need to trouble-shoot.
  150. 2 to 3 prong conversion for Fender Champ no ground switch
  151. Fender Twin Reverb (ab763) motorboating?
  152. PT centre tap floating via resistor?
  153. Do you need all transistors need Mica Insulator?
  154. JMP100 Transformer and Cap
  155. Rebuilding a Marshall 4x12B cabinet...
  156. Music Man Heater Current
  157. Standel Transistors
  158. Magnatone Noisy PI
  159. Peavey Classic Tremolo Circuit Not Working
  160. Fender Blues Deluxe Reissue clean channel Noise.
  161. Traynor - YGM-2 - biasing issues
  162. bassman 12at7 phase inverter to 12ax7
  163. EMC Scorpio ???
  164. Matchless Chieftain Oscillating
  165. Haunted by David Eden
  166. Kustom K150 noise in channel 4
  167. Gibson Hawk questions
  168. 5e3 circuit too boxy/brittle?
  169. 86' jcm 800 2210 big hum in fx loop
  170. Nashville 400 DDT
  171. Magnatone Starlett Dead
  172. Fender Hot Rod Deluxe PT Issue
  173. Old plexi Calsbro very low volume
  174. Hughes & Kettner Switchblade 100 head FU2 Fuse issue
  175. transistor number
  176. Behringer PMP6000 - no L channel output
  177. kustom k100-0 pc103 driver transistor substitution help.... HELP
  178. SVT Plate resistor value
  179. PT explanation please
  180. Polytone 103
  181. 1972 Peavey 400 series power module - I'm in over my head
  182. Fender Frontman 212R - loud popping and crackling
  183. H&K Triamp MK II neon lights not working
  184. Vox AC30C2
  185. Tweed to BF tone circuit output loss
  186. Toroid Taps question
  187. Gibson GA45-RVT low power
  188. low voltages with 5y3 and fender original 5e3 PT
  189. AC15 Hum issues
  190. Vintage 1973 Pignose 7-100 sounds muddy (solid state)
  191. Ampeg B100R power transistors saturating
  192. EL84 current draw help
  193. Lightning Show! Bad bottle?
  194. Blues Deville Bias question?
  195. Crate VC50 H power tube question
  196. Choke mod choked?
  197. Saturn GA-45RVT Low Power
  198. SVT3Pro fixed...how to certify?
  199. JCM900 5881 to EL34
  200. Crate BFX 100 - WTF were they thinking??
  201. SWR 350 bass head not working?
  202. The Dumbassbob 63 Bandmaster amp is Fixed!!!!!
  203. Red Bear MKE60
  204. Sunn Concert Lead - hum
  205. TC G-Major parts
  206. Nuts
  207. GK Backline 210
  208. Rectifier choice in Princeton Reverb style amp.
  209. R78, R79 in a Hot Rod Deluxe III
  210. SWR Workingmn's 15 bias adjustment
  211. Peavey Combo 300 Bass Amp makes loud noise when turned on.
  212. SLM AMPEG SVT-II Pro
  213. Boogie Mark IV B with bad optocoupler on lead channel help!
  214. Crate 112 Won't distort??
  215. Sunn Beta Bass steady-rate popping
  216. Mesa subway rocket loud hum
  217. Ashdown Klystron 500 blown fuse
  218. Traynor YGM 3-prong conversion
  219. Hot Rod Deluxe Oscillation.
  220. Marshall JCM800 100watt super bass clone
  221. Engl Raider 100 PT - learning the hard way
  222. Ampeg TM-1 Optoisolator
  223. Marshall AVT2000: DFX function completely broken
  224. Smoke from Line 6 HD150
  225. Low volume problem, Airline GIM 9011A
  226. Bugera 333XL problems with Crunch and Lead Channel
  227. Vintage Amp: Service or not?
  228. Eden WT-800 low/distorted output
  229. Soldering headache.
  230. motorboating?
  231. Fender passport repair
  232. Roland Jazz Chorus 90 Buzz
  233. Reverb Tank question...
  234. Red Knob Twin hum until V9 removed
  235. How can I find out the output resistance/ohms of my amp? Gibson GA77RET
  236. Blues junior v5 running extremely hot after mods
  237. SVT Primary Impedance?
  238. What do you offer in a service?
  239. bias Mv for EVH III 100 watt head?
  240. Bad amp tech's !!!!
  241. preamp section not working on LABSERIES L3
  242. Crate Gremlins
  243. Dummy Load Help
  244. eden wt 400 power board
  245. Adding a Tube Recto? WEM Dom amp.
  246. Univox U-1101
  247. Mesa Tremoverb EQ change when using reverb
  248. Fender Hot Rod Deluxe Problem
  249. continuous power handling
  250. 5150 Block Letter with a strange Bias Mod?