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 41 42 43

  1. Yamaha g50-112 II troubleshooting
  2. Polytone 103 Reverb Problem
  3. Marshall valvestate 8200 bi chorus problem!
  4. Mesa 2:90 power amp channel B distorted
  5. Here's a good one.. Ruby Tube quality fail.
  6. 1961 Supro 1624T Low Volume Issue. Need to trouble-shoot.
  7. 2 to 3 prong conversion for Fender Champ no ground switch
  8. Fender Twin Reverb (ab763) motorboating?
  9. PT centre tap floating via resistor?
  10. Do you need all transistors need Mica Insulator?
  11. JMP100 Transformer and Cap
  12. Rebuilding a Marshall 4x12B cabinet...
  13. Music Man Heater Current
  14. Standel Transistors
  15. Magnatone Noisy PI
  16. Peavey Classic Tremolo Circuit Not Working
  17. Fender Blues Deluxe Reissue clean channel Noise.
  18. Traynor - YGM-2 - biasing issues
  19. bassman 12at7 phase inverter to 12ax7
  20. EMC Scorpio ???
  21. Matchless Chieftain Oscillating
  22. Haunted by David Eden
  23. Kustom K150 noise in channel 4
  24. Gibson Hawk questions
  25. 5e3 circuit too boxy/brittle?
  26. 86' jcm 800 2210 big hum in fx loop
  27. Nashville 400 DDT
  28. Magnatone Starlett Dead
  29. Fender Hot Rod Deluxe PT Issue
  30. Old plexi Calsbro very low volume
  31. Hughes & Kettner Switchblade 100 head FU2 Fuse issue
  32. transistor number
  33. Behringer PMP6000 - no L channel output
  34. kustom k100-0 pc103 driver transistor substitution help.... HELP
  35. SVT Plate resistor value
  36. PT explanation please
  37. Polytone 103
  38. 1972 Peavey 400 series power module - I'm in over my head
  39. Fender Frontman 212R - loud popping and crackling
  40. H&K Triamp MK II neon lights not working
  41. Vox AC30C2
  42. Tweed to BF tone circuit output loss
  43. Toroid Taps question
  44. Gibson GA45-RVT low power
  45. low voltages with 5y3 and fender original 5e3 PT
  46. AC15 Hum issues
  47. Vintage 1973 Pignose 7-100 sounds muddy (solid state)
  48. Ampeg B100R power transistors saturating
  49. EL84 current draw help
  50. Lightning Show! Bad bottle?
  51. Blues Deville Bias question?
  52. Crate VC50 H power tube question
  53. Choke mod choked?
  54. Saturn GA-45RVT Low Power
  55. SVT3Pro fixed...how to certify?
  56. JCM900 5881 to EL34
  57. Crate BFX 100 - WTF were they thinking??
  58. SWR 350 bass head not working?
  59. The Dumbassbob 63 Bandmaster amp is Fixed!!!!!
  60. Red Bear MKE60
  61. Sunn Concert Lead - hum
  62. TC G-Major parts
  63. Nuts
  64. GK Backline 210
  65. Rectifier choice in Princeton Reverb style amp.
  66. R78, R79 in a Hot Rod Deluxe III
  67. SWR Workingmn's 15 bias adjustment
  68. Peavey Combo 300 Bass Amp makes loud noise when turned on.
  69. SLM AMPEG SVT-II Pro
  70. Boogie Mark IV B with bad optocoupler on lead channel help!
  71. Crate 112 Won't distort??
  72. Sunn Beta Bass steady-rate popping
  73. Mesa subway rocket loud hum
  74. Ashdown Klystron 500 blown fuse
  75. Traynor YGM 3-prong conversion
  76. Hot Rod Deluxe Oscillation.
  77. Marshall JCM800 100watt super bass clone
  78. Engl Raider 100 PT - learning the hard way
  79. Ampeg TM-1 Optoisolator
  80. Marshall AVT2000: DFX function completely broken
  81. Smoke from Line 6 HD150
  82. Low volume problem, Airline GIM 9011A
  83. Bugera 333XL problems with Crunch and Lead Channel
  84. Vintage Amp: Service or not?
  85. Eden WT-800 low/distorted output
  86. Soldering headache.
  87. motorboating?
  88. Fender passport repair
  89. Roland Jazz Chorus 90 Buzz
  90. Reverb Tank question...
  91. Red Knob Twin hum until V9 removed
  92. How can I find out the output resistance/ohms of my amp? Gibson GA77RET
  93. Blues junior v5 running extremely hot after mods
  94. SVT Primary Impedance?
  95. What do you offer in a service?
  96. bias Mv for EVH III 100 watt head?
  97. Bad amp tech's !!!!
  98. preamp section not working on LABSERIES L3
  99. Crate Gremlins
  100. Dummy Load Help
  101. eden wt 400 power board
  102. Adding a Tube Recto? WEM Dom amp.
  103. Univox U-1101
  104. Mesa Tremoverb EQ change when using reverb
  105. Fender Hot Rod Deluxe Problem
  106. continuous power handling
  107. 5150 Block Letter with a strange Bias Mod?
  108. WEM Dominator/ Ch2 not working.
  109. Gibson 20-T squeal
  110. Replacing 2 prong power cord in vintage amp
  111. Fishman Loudbox Performer Heat issues.
  112. oil problem
  113. Variable Capacitor in '60s Airline Amp
  114. Ampeg BA115 very loud humming sound
  115. Enzo
  116. Link ch1 to MV? [ Crate Bv-omfg]. Plan B!
  117. Workman Transitest
  118. nevermind...found it
  119. Cabinet for Deluxe Reverb AB763 Combo - Europe based supliers
  120. Peavey DTH 218 sub
  121. Crackling
  122. Aguilar DB750 trouble!
  123. Sovtek MIG50 odd power tube draw
  124. Ampeg SVT 4Pro equalizer circuit problem
  125. ROLAND JC120
  126. Harbinger HP215 schematic needed
  127. Marshall JCM2000 DSL100
  128. Legend A30 humming
  129. New Weber Legacys in Hot Rod Deville - Does this look right....??
  130. JMF Spectra 30-T Bias issues
  131. Bandmaster AB763 Problem
  132. Ampeg V-6B Transistor Substitutions
  133. Tweed Deluxe Clone sounds Thin and Weak Help Please!
  134. Peavey 450 Tour
  135. Peavey Session 400 Headroom
  136. 70's Peavey Bass 400 module problem
  137. Mesa still Blowing fuses.
  138. Bias voltage too low...?
  139. Sovtek MIG 50 blowing fuses
  140. epiphone triggerman 100h weird problem
  141. Reverb "hum" in Marshall VS100
  142. dumb question
  143. Orange Tiny Terrorist
  144. Paul pepco model 201 isolation transformer
  145. Intermittent red plating on standby
  146. Traynor YBA-1 issues
  147. 60 hz hum
  148. Help with a 68 Sunn Sentura II
  149. Vintage Traynor YGM-3 Tremolo Issue
  150. Proper posture for bench repair?
  151. Volume Potentiometer - RCF ARTxxx
  152. anyone with screen grid voltage higher than plate voltage in Deluxe reverb?
  153. BIAS Deluxe Reverb High B+ AB763
  154. [ 'Dead CRATE BV- need help! ]
  155. Trace AH500 and the rare Mosfets
  156. newish Mesa DR
  157. Well THAT was different
  158. Fender Hot Rod DeVille 2x12 Low Volume
  159. Elementary Fender Twin Bias adjustment
  160. Fishman Loudbox mini schem?
  161. Nomad 45: round 2
  162. Your shop rate and poilicies
  163. Egnater Rebel 20 power with no sound
  164. Mesa MK II excessive noise.
  165. Really unbalanced phase inverter?
  166. MESA Express 5:25 - high b+, high current draw on power tubes - normal?
  167. High B+ GZ34 deluxe reverb
  168. Weber 6H50 "Hiwatt" style amp. Howl and presence control issues
  169. What causes too high plate voltage?
  170. Orange Rocker 30, not so 30...
  171. SF Twin 135 speaker output wiring
  172. Problems with Laney DB300C bass amp
  173. JCM 800 Output Transformer
  174. Bogner Alchemist Schematic
  175. Kustom Lead-I Effects Not Working
  176. 70's Ampeg V2: need some maintenance help
  177. Hughes & Kettner Trilogy Head
  178. Ampeg VL-1002 fx loop problem
  179. Heathkit TA-17: power-stage resistor keeps blowing
  180. crate gx130c resistor overheating
  181. Testing a capacitor with an ohmmeter
  182. Ampeg SVT Trio intermittently dropping out.
  183. i have a crate gx130c resistors seem too hot
  184. 5u4gb or Gz34 Tube Rectifier and Hammond Transformers Deluxe ab763
  185. Bassman AB165 burned filament resistors
  186. Buzz if guitar near amp (not speaker) - normal?
  187. 70's Twin Reverb loud circuit disturbance during warmup
  188. Kitty Hawk Junior Hissy Fit!
  189. Vox AD30VT - is it too hot?
  190. need advice to spec power transformer
  191. Higher than expected current draw - Fender Pro Reverb Amp
  192. Deluxe AB763 buss bar grounding
  193. Marshall short
  194. Hammond 291BEX heater winding grounding
  195. Mackie SR1530 no output
  196. Marshall JCM800 Bias Problem
  197. Carvin X-60E problem - Loud distortion howling noise
  198. Deluxe Reverb AB763
  199. Blown 1 OHM current-sense resistors
  200. Acoustic G60T warbling decay
  201. Ampeg BA115-hpt amp. Mains hum + signal breaking up - but only when hot...
  202. Fender Super Six Reverb Re-Cap Question
  203. 18 watt plexi with 6v6's has squealing problem?
  204. CRATE BV amp Ch1 prob- "Crunchy" Noises.
  205. 76 ampeg V4 low output
  206. Crate Vintage Club 50 "cutting out".
  207. Effects Loop Mod Question
  208. Crate PA-B8350 Mains fuse size or schematic
  209. Acoustic 122 restoration
  210. Acoustic 270 tremolo
  211. Transformer making this (recorded) sound. Intermittent buzzing. Caps?
  212. Mesa Nomad 45 heater issue?
  213. Haze 15 - Noise
  214. Power tube bias and OT load...
  215. Jazz Chorus 77 powers up but no sound
  216. Crossover/Horn Trouble!
  217. Shot in the dark looking for schematic for old JVC Integrated Amp
  218. Decipher Marshall scem
  219. MF350 Mode Four musings, thoughts, comments
  220. Working through a Ampeg Super Echo Twin ET-2b
  221. Princeton 112 Plus - Shutdown MOD
  222. Marshall jcm 2000 dsl 401 problem.
  223. HARTKE A70 limitter issue
  224. Hartke LH500 head, 10 seconds of sound.
  225. 1972 Fender Super 6 Reverb - Volume Question
  226. Marshall Valvestate VS100
  227. Peavey Musician Mark 3 gut shots?
  228. Hartke A70 problem
  229. Redplating Tubes in Dumble Clone
  230. Fender TRS pedal issue
  231. 66 Ampeg J12-D
  232. Marshall Lead 100 Mosfet
  233. Rebel 20 wont bias up to spec, low constant hum
  234. Princeton 112 Plus - Intermittent "Popping"
  235. Need a new DMM. Advice?
  236. Crate BT50 Speaker Noise
  237. Peavey LTD 400 low volume distortion
  238. Wall Voltage AC
  239. Ampeg B5R premature decay of notes
  240. 1979 Ampeg V2 blowing main fuse at full volume only....
  241. Ampeg BA115 weird problem fixing poweramp
  242. Peavey 400 LTD Help
  243. Blues Deluxe switching problem
  244. Fender princeston 112 Plus Distorted clean channel
  245. Carlsbro GLX100 popping internal fuses
  246. Marshall DSL lowa bias 27ma 33ma max
  247. DC offset on b&k 3020 sweep / function generator
  248. ashdown peacemaker 40 schematic?
  249. Marshall 3520 bass amp help, blowing fuses...
  250. Ampeg SVT-6 Pro reading +64vdc on the speaker output.