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

  1. Crate Blue Voodoo BV120H on the bench
  2. Peavey Mace Footswitch LEDs ?
  3. 6G3(-ish) Amp Popping Fuses--Need Ideas!
  4. Finished 6G6 Build - But No Bass Response on Bass CH & Too Much Bass on Norman CH
  5. Marshall 1923C ( DSL 50) blows HT fuse
  6. What could this farty little distortion be caused by
  7. HotRod crappiness
  8. Acoustic B200H Service Manual?
  9. Early 80's roland cube 100- Orange
  10. Line 6 Spider Valve HD100 (Bogner) TROUBLE- No output
  11. Peavey Classic 212 VT
  12. Gibson GA45RVT reverb died.
  13. TOA P2122 Schematic?
  14. Roland Cube 60 intermittent internal popping
  15. Roland re201 echo problem
  16. Edison Professional Powered Speaker System
  17. Vox Cambridge 15 and Cambridge 30 reliability upgrades, mods, and tweaks
  18. Ampeg Portflex B-12XT Power tx
  19. Garnet Mini Bass tremolo repair
  20. Orange 200 thunderverb - tube failure
  21. Fender SRM 6302 PA bad hum
  22. Negative Feedback Question
  23. Marshall Vasvestate VS100R Head
  24. Kustom 4 terminal pots
  25. 12AT7 in Univox U-255R runs scalding hot.
  26. Mesa MkV unusual problem
  27. Matching BJT differential pair
  28. Schematic Help Needed Fender Stage 160 DSP
  29. DIY patch cables, major signal loss - what gives??
  30. Head scratcher: 5150 combo bias mod screweyness
  31. Fender Princeton AA1164 1K b+ dropping resistor cooks
  32. Power amp ok on resistive load, but not with speaker
  33. SWR 400 Working Pro
  34. Vox Cambridge 30 Reverb busted
  35. What the ?????
  36. LM3886T Mute Circuit
  37. Valvetech chassis pics
  38. Fender Twin Reissue - No Power, Good Fuses, Inrush Limiter Seems OK
  39. Bogner ecsstacy help please, tubes red plating
  40. Hughes and Kettner 6L6 Guitar Valve Amp- Oscillation/ Rattle/ Reverb Issue
  41. Is this right?
  42. Orange Thunderverb 50 bias - PLEASE HELP!!
  43. Thank you
  44. Ampeg superbreverb Variable Bias Trem/(vibrato) thump all the time, footswitch good
  45. Fender 75
  46. Behringer Amps and Isolated Jacks
  47. Evans Lapsteel amp Fault
  48. VOX AC30/6 TB problems
  49. Output Transformer works but totally cool
  50. Staticy Woosh when turning off standby, background grit: Rivera Fandango 55
  51. 40 watt Sunn amp sounds great but lacks power
  52. Ashdown chassis removal
  53. Marshall 2020 transformer reliability
  54. BA-115HPT
  55. Recommendations for a good epoxy to repair a circuit board
  56. transitor substitution help
  57. Bias probes ?? UK supplier?
  58. Hartke HA-3500 farty noise
  59. 1959 Superlead sounding bad after can cap job
  60. Weber copper cap rectifier - Blown?
  61. Bogner Shiva - reverb issue
  62. Fender optoisolator tremolo ticking/clicking
  63. 1953 Gibson BR9-GA9 hybrid model Low output volume
  64. usa built blues deville 4x10 footswitch problem
  65. Volume fading in and out on a Peavey Vyper 75w combo amp
  66. jcm900 high gain dual reverb very low volume
  67. Fender Red Knob Twin (1987-1994) aka THE TWIN upgrades
  68. Another -15v supply problem!
  69. Fender the twin (1990's) 250k 16mm PDT pots
  70. scope help
  71. Behringer ACX1000 schem?
  72. Music Man 2165-RD Voltage Issue
  73. Bose System L1 Compact Power Stand
  74. Fender Hotrod deluxe noise like popcorn
  75. Got a Crown CE2000 Semi Fixed, Beginner looking for advice
  76. Mojotone CTS pots?
  77. Re-coating burned through PCB trace coating?
  78. Fender Super Reverb RI heating up
  79. NO CHANNEL 2 on MUCH BELOVED FENDER SUPER CHAMP XD.
  80. Laney VC30 112 bias problem (?)
  81. Reverb Tank reqd foruse as test equipment
  82. Plush P1000s on the bench
  83. Svt3 Pro Mosfets
  84. Gallien-Krueger 700RB
  85. Film capacitor
  86. New reverb tank needed?
  87. Replacement knobs for Champion 110 Amplifier
  88. What does this mod do? VH100R
  89. Cant find a OT for DSL401
  90. Gibson Apollo (GA-95RVT) AKA: Nightmare.
  91. Phase inverter, Mesa Boogie SOB
  92. Marshall JCM600 Head Drive channel low volume
  93. Vibrato channel no sound .
  94. How do I easily remove silicone sealant?
  95. Farfisa compact organ.
  96. Semi noisy carvin cx1272
  97. George L's Speaker cables ?
  98. Looking for ED combo amp schematic
  99. Brand new preamp tubes seem to be bad ?
  100. Bench supply recommendations
  101. How do I make this 'widowmaker' safe?
  102. Cathode bypass caps in Bassman 135
  103. '65 SR tranny ticking
  104. How do I rust new screws?
  105. Scratchy, Popping, Distortion in new Pro-Reverb build.
  106. Peavey rockmaster pre amp problems
  107. Hot Rod Deville III V1 random noise and oscillation.
  108. Need good amp tech in DFW area
  109. US Masters TVA30 schematic anyone?
  110. Marshall 6100
  111. HiWatt G15 8 MaxWatt - Gone Silent, chip details needed
  112. Cornford hurricane Blown Mains TX 2nd time
  113. Sessionette Power Amp Replacement
  114. Kustom K250-2
  115. Another MARSHALL Valvestate 2000 AVT150 Blowing fuses......
  116. Peavey Special 2x12 power supply is bad is this an easy fix
  117. Is this scope worth a nickel?
  118. Mesa 50 cal fried resistors continued
  119. Marshall VS 8080 IC1 Blowing.
  120. Quality workmanship.....
  121. What was the hardest problem you ever found and fixed?
  122. Deluxe Reverb schematic discrepancies?
  123. Fender Chamion DSP 30 Channel 2 has no volume control
  124. Best Way To Clean Off Green Powder Dust Off Old Chassis?
  125. 969 Ampeg SVT being snappy
  126. Vintage PA Tube Head Output Question
  127. Marshall 2100 JCM 900 Head Hum
  128. Question about 50s Fender OT ID
  129. JCM 800 2204 Self oscillation problem
  130. Bleed Resistor to Discharge High Voltage Caps in Tube Amp
  131. Crate v18 212 amp wont turn on anymore???
  132. Marshall 8008 Rack mount Blowing transistors
  133. Hughes and Kettner Switch Blade 100 guitar head
  134. 4.6V heater voltage on Fender Pro Tube Twin
  135. blues deluxe 1993 not the reissue
  136. Laney L30B Hums, Blows Fuses
  137. Buzzing first minute or so, Laney VH100R
  138. Sunn Beta Lead - Random but relatively constant crackle on output
  139. Marshall 2100 JCM 900 head oscillating
  140. No volume with Peavey XXL with effects loop in use.
  141. HELP With VOX AC100CPH
  142. Hughes and Kettner Switch Blade 100 guitar head
  143. Fender Hot Rod Deluxe 3
  144. Hum/Buzz When Power Transformer is Grounded to Chassis
  145. 100uf + 100uf caps bigger than 35mm
  146. Anyone Up For A Vintage Tube Swap?
  147. Fuse differences
  148. Fender Hot Rod Deluxe - weird noise on Drive channel
  149. Roland - JC77 potentiometer replacement
  150. SF Twin Reverb with buzzy reverb
  151. Crate VC6210 popped NTC before fuse, need advice..
  152. TSL-60 with vexing farting problem on all channels
  153. Mesa .50 Caliber + Fried resistors
  154. Cornford Hurriance blown tx again
  155. Fender Deluxe 5C3 question
  156. Need help finding pots for Hartke repair
  157. samson s6 distorted output
  158. I Thought It Was a Ground Loop
  159. Ampeg B-200R Dc on output
  160. bad tube with bizarre symptom
  161. PEAVEY XXL head won't switch channels
  162. Peavey 212 clean channel won't work
  163. Plush P1000s on the bench
  164. Strong oscillation in Reverberocket Echo circuit
  165. Fender 6G6-B Bassman hum
  166. Fender Performer 1000 popping on turn-off
  167. Replacement potentiometer for Fender Red Knob Twin
  168. Just shooting the breeze Carvin 400FET
  169. Carlsbro Powerine 800 voltages
  170. Crate Blue Voodoo
  171. SF Twin Reverb Vibrato Hum on Speed Pot??
  172. PV XR600 400R links?
  173. Traynor YCV40 Blown DC Filament Circuit
  174. Circuit diagram for Roland KC-500?
  175. Crate GXT-100W circuit diagram?
  176. Fender Hot Rod Deluxe Issue
  177. SWR LA-15 Stumped
  178. Fender Rumble 100 Bass Amp Problems- Help, Please.
  179. 1974 Garnet stencil 10-PT - AC isolation mod
  180. Cornford hurricane schematic
  181. Ampeg Gemini II 7591 bias questions
  182. Ampeg Gemini II Tone stack question
  183. HK switchblade 50W combo repair
  184. What is wrong with NTE transistors?
  185. Ampeg SVT-300 bias
  186. Amp Static Crackling noises SOUND CLIP ATTACHED
  187. Tweed Bassman clone with harsh breakup
  188. Marshall tsl 100 head loud Clean Channel Hum after it heats up after few minutes on
  189. No volume with Crate GLX1200H
  190. musicman mystery tap
  191. channel switching help (problem with amp)
  192. preamp valve weirdness
  193. Mesa F100 blowing single tube, in same socket, every time
  194. Twin reverb boost oscillation
  195. hartke ha7000
  196. Bugera 333xl-212 cap problem
  197. Could this cause my issue?
  198. Marshall Connector Identification
  199. 6V6 amp cutting out when guitars strings are picked hard
  200. Hafler G300 clipping on negative portion of waveform
  201. 80's Yamaha G-100
  202. SVT3Pro power amp failure
  203. Blackstar series one 50 help
  204. bias issue
  205. Blues Jr oscillation-
  206. Rattling on Fender Red Knob Twin! What could be the cause?
  207. Single Ended Odd Distortion - To NFB or not to NFB?
  208. Fender Champion 30
  209. Ampeg B15 woes.... no sound from guitar
  210. Fender Roc 1000 changing channels when played.
  211. Marshall JCM 2000 trans wires
  212. Marshall DSL short ???
  213. Need 3 Prong Power Conversion - But Heater On Primary Side of Iso Trans
  214. Krankenstein Jr PT replacement?
  215. Marshall VS100 clean problem
  216. Need Bias Help VC50H by SLM Crate
  217. GK 400rb III, heatsink isolated screw
  218. B-15N Power transformer replacement
  219. Current problem with a 6534+
  220. Looking for info on Ampeg B4
  221. Dealing with High B+
  222. Marhsall 100watt 1959 SLP Oscillation?
  223. SVT CL repair - process and safety
  224. Prosonic drive channel week and nasty problem
  225. Fender Super Champ XD no sound
  226. Marshall DSL HELP !
  227. What is your favorite flush cutter?
  228. Mesa Blue Angel burned board
  229. ** The Marshall TSL122 JCM2000 Repair/Mods Page **
  230. Help With Squeal/Crosstalk...
  231. HUM Marshall JMP 50w
  232. hooking up a 3 wire power cabl
  233. Soldano Cuts out
  234. Peavey Valveking died
  235. 73 Fender Silverface Twin Reverb Noise New Findings & Questions
  236. Fender 1961 Concert Brown face 6g12a re-cap time, need input
  237. Twin Reverb PT Surface Temperature
  238. Weird residual voltage problem...
  239. 5e3 build buzzing/overtone noise
  240. Ashdown EVO 500 III Hum
  241. fender prosonic output transformer
  242. AC30 Normal channel ground loop fix
  243. Channel bleed JCM 800 2205
  244. Fender reverb driver transformer - green wire grounded?
  245. 60's VOX Berkely II - where is the reverb tank?
  246. 333xl infinium problem
  247. Transformer specs
  248. Could someone open their Boogie Mark III for me?
  249. Line 6 Spider II - noise and channel switching issue
  250. Peavey Penta Series 140 Watt Head - Need Schematic