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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Another Champion 600 help thread
  2. Dynacord powermate 1000
  3. Fender Super Champ X2 smoking resisitor
  4. teisco checkmate 50 power switch
  5. A.R.T. Voice Channel Mic Pre (Rack Mount)
  6. Fender 68 Custom Deluxe Reverb
  7. Fender Hot Rod Deluxe
  8. BUGERA 333XL randomly shut off PLS HELP
  9. Knight 400 tube checker
  10. Looking for unusual jack from Epifani amp
  11. Looking for 8 pin tube socket adapter that can be dismanteled
  12. Looking for alternative to Peavey dual diode SZ-13886
  13. Fender Silverface Super Six Recap Job
  14. My Latest Score - 1974 Silverface Vibro Champ
  15. Sano 300R Tremolo Problem
  16. What insures voltage balance on stacked pairs of PS Filter Caps?
  17. Is this possible?
  18. Phase inverter tail resistor burned/smoke
  19. Carlsbro Marlin 6-300 Mk II
  20. New 2203 Hum Balance
  21. Marshall JCM2000 DSL Superlead 100 DSL - PWR Transformer Shorted?
  22. M Taper or Special Taper pot question
  23. Phonic Helix 24 Firewire Mk 1? " Firewire issue "
  24. Blues Junoir reverb dead
  25. Rectifier voltage shifting when standby switched on
  26. Sub for BA 4560 opamp
  27. Blast from the past... Flo-a-tone
  28. SRRI one output tube inactive
  29. Session 400 again and again
  30. 1974 Celestion Creamback with a 70s Waldom recone question
  31. 1981 Peavey Special combo amp question about filter caps
  32. MG100 HDFX no power HELP!!
  33. Park 75 Bass Amp Biasing Question
  34. Center-tapped pots?
  35. Ghost notes or what? (video)
  36. ANOTHER dead valvestate !
  37. Mackie SWA 1801 Service Notes
  38. Blues Junior distorted and low volume
  39. Behringer Euro Live B1800D PRO 18" subwoofer help SMPSU28 and P0981 pcb's
  40. PV Session 400 LTD...again
  41. stereo/mono cab wiring jacks?
  42. Swr 750x pre-amp problem!
  43. Behringer BXL1800A problem
  44. AC Voltage Measurement - Hum Reduction
  45. Ground Loop???
  46. Would You Guys Replace This OT?
  47. Marshall Preamp
  48. Fender FM65R distorts after 1/2 hour
  49. Peavey special 130 pop on clean channel
  50. Carvin Legacy (105 hz hum?)
  51. Sunn Concert Bass shutting off
  52. Vox AC 30/6 TP Potentiometers Supplier
  53. Fender blues deville foot switch problem......
  54. Gibson Invader red plating
  55. Marshall B150 -56vdc on speaker output
  56. Blackstar HT-5 barely any output
  57. 3 prong on tube tester?
  58. Egnater Rebel 20
  59. peavey kb300(nothing)
  60. Fender Stage 100 transformer wiring. I think I hooked it up wrong.
  61. Peavey Vyper 15w Modeling Amp only works through headphone jack
  62. Looking for Ampeg socket
  63. '65 Fender Deluxe - One 6V6 cherrying and I'm stumped
  64. Tube tester shot craps?
  65. Peavey Bass-Fex battery type?
  66. Help me with OLD tube amp!
  67. Super Reverb Volume Controls won't Silence the Guitar
  68. Looking for Ampeg SVT CL resistor
  69. Weird feedback---Crate
  70. Peavey Rockmaster Preamp Static Sizzling Noise
  71. cant find parts???
  72. Ampeg B100R Static Under Notes
  73. hartke 3500 troubles
  74. Randall RH200 strange noise??????
  75. Behringer pmp4000 blinking lights no sound
  76. Hot Rod Deluxe Caps - replace all at once?
  77. Laney TF 300 tone problems...
  78. Hot Rod Deluxe issue
  79. Need help determining ratings for rectifier diodes on a Supro S6625
  80. Crate VTX212 Loud Hum Whe Instrument Plugged In
  81. B212D Schematic Needed
  82. Univox U-1075 PA amp
  83. PV ValveKing Combo dead
  84. microphonic EH KT90's
  85. Bugera 6260 changing stock tubes to JJ 6L6's
  86. Output Transformer Impedance Verification
  87. Hot Rod Delux repair/mods
  88. Peavey TNT 150 Hum Problem
  89. Yamaha G50 112
  90. Phase inverter tube?
  91. Peavey Ultra plus quiet on crunch and ultra channels
  92. Hiss/Crackle in a Marshall 1959 Super Lead head from 1969
  93. Sovtek 6L6WXT
  94. Yamaha g50-112 II troubleshooting
  95. Polytone 103 Reverb Problem
  96. Marshall valvestate 8200 bi chorus problem!
  97. Mesa 2:90 power amp channel B distorted
  98. Here's a good one.. Ruby Tube quality fail.
  99. 1961 Supro 1624T Low Volume Issue. Need to trouble-shoot.
  100. 2 to 3 prong conversion for Fender Champ no ground switch
  101. Fender Twin Reverb (ab763) motorboating?
  102. PT centre tap floating via resistor?
  103. Do you need all transistors need Mica Insulator?
  104. JMP100 Transformer and Cap
  105. Rebuilding a Marshall 4x12B cabinet...
  106. Music Man Heater Current
  107. Standel Transistors
  108. Magnatone Noisy PI
  109. Peavey Classic Tremolo Circuit Not Working
  110. Fender Blues Deluxe Reissue clean channel Noise.
  111. Traynor - YGM-2 - biasing issues
  112. bassman 12at7 phase inverter to 12ax7
  113. EMC Scorpio ???
  114. Matchless Chieftain Oscillating
  115. Haunted by David Eden
  116. Kustom K150 noise in channel 4
  117. Gibson Hawk questions
  118. 5e3 circuit too boxy/brittle?
  119. 86' jcm 800 2210 big hum in fx loop
  120. Nashville 400 DDT
  121. Magnatone Starlett Dead
  122. Fender Hot Rod Deluxe PT Issue
  123. Old plexi Calsbro very low volume
  124. Hughes & Kettner Switchblade 100 head FU2 Fuse issue
  125. transistor number
  126. Behringer PMP6000 - no L channel output
  127. kustom k100-0 pc103 driver transistor substitution help.... HELP
  128. SVT Plate resistor value
  129. PT explanation please
  130. Polytone 103
  131. 1972 Peavey 400 series power module - I'm in over my head
  132. Fender Frontman 212R - loud popping and crackling
  133. H&K Triamp MK II neon lights not working
  134. Vox AC30C2
  135. Tweed to BF tone circuit output loss
  136. Toroid Taps question
  137. Gibson GA45-RVT low power
  138. low voltages with 5y3 and fender original 5e3 PT
  139. AC15 Hum issues
  140. Vintage 1973 Pignose 7-100 sounds muddy (solid state)
  141. Ampeg B100R power transistors saturating
  142. EL84 current draw help
  143. Lightning Show! Bad bottle?
  144. Blues Deville Bias question?
  145. Crate VC50 H power tube question
  146. Choke mod choked?
  147. Saturn GA-45RVT Low Power
  148. SVT3Pro fixed...how to certify?
  149. JCM900 5881 to EL34
  150. Crate BFX 100 - WTF were they thinking??
  151. SWR 350 bass head not working?
  152. The Dumbassbob 63 Bandmaster amp is Fixed!!!!!
  153. Red Bear MKE60
  154. Sunn Concert Lead - hum
  155. TC G-Major parts
  156. Nuts
  157. GK Backline 210
  158. Rectifier choice in Princeton Reverb style amp.
  159. R78, R79 in a Hot Rod Deluxe III
  160. SWR Workingmn's 15 bias adjustment
  161. Peavey Combo 300 Bass Amp makes loud noise when turned on.
  162. SLM AMPEG SVT-II Pro
  163. Boogie Mark IV B with bad optocoupler on lead channel help!
  164. Crate 112 Won't distort??
  165. Sunn Beta Bass steady-rate popping
  166. Mesa subway rocket loud hum
  167. Ashdown Klystron 500 blown fuse
  168. Traynor YGM 3-prong conversion
  169. Hot Rod Deluxe Oscillation.
  170. Marshall JCM800 100watt super bass clone
  171. Engl Raider 100 PT - learning the hard way
  172. Ampeg TM-1 Optoisolator
  173. Marshall AVT2000: DFX function completely broken
  174. Smoke from Line 6 HD150
  175. Low volume problem, Airline GIM 9011A
  176. Bugera 333XL problems with Crunch and Lead Channel
  177. Vintage Amp: Service or not?
  178. Eden WT-800 low/distorted output
  179. Soldering headache.
  180. motorboating?
  181. Fender passport repair
  182. Roland Jazz Chorus 90 Buzz
  183. Reverb Tank question...
  184. Red Knob Twin hum until V9 removed
  185. How can I find out the output resistance/ohms of my amp? Gibson GA77RET
  186. Blues junior v5 running extremely hot after mods
  187. SVT Primary Impedance?
  188. What do you offer in a service?
  189. bias Mv for EVH III 100 watt head?
  190. Bad amp tech's !!!!
  191. preamp section not working on LABSERIES L3
  192. Crate Gremlins
  193. Dummy Load Help
  194. eden wt 400 power board
  195. Adding a Tube Recto? WEM Dom amp.
  196. Univox U-1101
  197. Mesa Tremoverb EQ change when using reverb
  198. Fender Hot Rod Deluxe Problem
  199. continuous power handling
  200. 5150 Block Letter with a strange Bias Mod?
  201. WEM Dominator/ Ch2 not working.
  202. Gibson 20-T squeal
  203. Replacing 2 prong power cord in vintage amp
  204. Fishman Loudbox Performer Heat issues.
  205. oil problem
  206. Variable Capacitor in '60s Airline Amp
  207. Ampeg BA115 very loud humming sound
  208. Enzo
  209. Link ch1 to MV? [ Crate Bv-omfg]. Plan B!
  210. Workman Transitest
  211. nevermind...found it
  212. Cabinet for Deluxe Reverb AB763 Combo - Europe based supliers
  213. Peavey DTH 218 sub
  214. Crackling
  215. Aguilar DB750 trouble!
  216. Sovtek MIG50 odd power tube draw
  217. Ampeg SVT 4Pro equalizer circuit problem
  218. ROLAND JC120
  219. Harbinger HP215 schematic needed
  220. Marshall JCM2000 DSL100
  221. Legend A30 humming
  222. New Weber Legacys in Hot Rod Deville - Does this look right....??
  223. JMF Spectra 30-T Bias issues
  224. Bandmaster AB763 Problem
  225. Ampeg V-6B Transistor Substitutions
  226. Tweed Deluxe Clone sounds Thin and Weak Help Please!
  227. Peavey 450 Tour
  228. Peavey Session 400 Headroom
  229. 70's Peavey Bass 400 module problem
  230. Mesa still Blowing fuses.
  231. Bias voltage too low...?
  232. Sovtek MIG 50 blowing fuses
  233. epiphone triggerman 100h weird problem
  234. Reverb "hum" in Marshall VS100
  235. dumb question
  236. Orange Tiny Terrorist
  237. Paul pepco model 201 isolation transformer
  238. Intermittent red plating on standby
  239. Traynor YBA-1 issues
  240. 60 hz hum
  241. Help with a 68 Sunn Sentura II
  242. Vintage Traynor YGM-3 Tremolo Issue
  243. Proper posture for bench repair?
  244. Volume Potentiometer - RCF ARTxxx
  245. anyone with screen grid voltage higher than plate voltage in Deluxe reverb?
  246. BIAS Deluxe Reverb High B+ AB763
  247. [ 'Dead CRATE BV- need help! ]
  248. Trace AH500 and the rare Mosfets
  249. newish Mesa DR
  250. Well THAT was different