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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Need help with a Fender Stage 160
  2. Crate V100H, Loud Technologies, Parts, Replacement Power Supply
  3. Weird bias loss!
  4. Marshall tsl fx loop bleed - help needed!
  5. 65 Twin Reissue problems
  6. Ampeg BA-115T keeps blowing fuses!
  7. Fender stage 100 blowing outputs
  8. measuring low value resistors
  9. Marshall MG15DFX clicking andpopping when turned on
  10. AVT 150 problem please help me
  11. SWR 350 problem
  12. silvertone 1484 filter cap can replacement
  13. How can I reduce hum in a Fender Champ?
  14. keep blowing the same capacitor
  15. Kustom K50 Main PCB Mounted 'Can' Style Diode(?) Help
  16. Ampeg SVT 3 pro PT secondaries
  17. Em field from tube amp rack style mounting
  18. Opto-trem driver tube bias?
  19. Peavey F800G Falling apart, Motorboating
  20. Vibrato does not work.
  21. Troubleshooting Blown Fuse
  22. Any buzz hum troubleshooting ideas for Hiwatt pcb?
  23. SF VIbro Champ Really Low Volume, Clean All the Way Up
  24. Hartke HA2000 powers up-no output
  25. Mesa Triple Rectifier Serial Loop Mod-Problem
  26. no sound lifco 630
  27. Peavey TNT 130 Board troubleshooting
  28. Marshall MG250-DFX
  29. Screen Grid Resistors
  30. What are indications of output transformer going bad??
  31. Where can I buy Ashdown knobs?
  32. princeton reverb problem
  33. Silverface Princeton caps
  34. begging for a helping hand, TSL 100
  35. Magnavox 5f1 tweed style tweed low watt style transformer issues
  36. peavey 5150 setup
  37. Feedback Problems Krank Rev 50
  38. Amp has started to howl and squeal: I need advice
  39. Foot switch education please
  40. Hot Rod deluxe signal when clean volume off
  41. Fender SRRI problem
  42. Crate GT 200 Lead channel Too Much distortion
  43. marshall jcm 800 distortion channel not fucntioning properly
  44. Replaced power transformer, now my amp is really quiet
  45. 65 Princeton Reverb
  46. Carvin AG100D input problem
  47. Kalamazoo Model 1 has developed some hum
  48. Now what?!?
  49. Randall Rg100es - Red chanel barley works
  50. Plexi Volume Trouble
  51. How hot is too hot?
  52. Fender Bandmaster
  53. Hiss and Hum?
  54. Fender Twin Amp buzzing coming from circuit board!?
  55. Crate V50 now the relay?
  56. Problems with peavey 5150 II distortion channel
  57. 1970's Peaveay "Classic" (not classic, 30 or 50) Low Volume Problem
  58. Peavey 5150 combo
  59. Any max temp specs for common tubes?
  60. Marshall AVT 150HX No Power
  61. Yes, size does matter. Or not? (Transformer Question)
  62. Traynor Bass mate
  63. Troubleshooting Marshall Mark II 100W Lead Master Vol. Model 2203
  64. 73 Blackfaced Twin buzzing on low notes
  65. Fender Blues Deluxe isssues..
  66. Amp Hum- Crate G-60
  67. Looking to apply some T.L.C (Heath TA-16)
  68. Mag 300 Drawing too much current? Blows fuses.
  69. 2 stroke/ Angela pse - hum but no guitar
  70. Fender Super-Sonic 22 Noise
  71. need help Marshall Mode 4
  72. Vox Super Foundation Bass problem
  73. New Output Transformer...worth it?
  74. which end is ground on this mylar bypass cap?
  75. Music Man 2275-130 redplating one side
  76. Behringer BX3000T start, shutdown problem
  77. Issue with Ampeg Gemini II chassis.
  78. Fender Blues Junior missing input beauty ring
  79. Marshall MG100DFX Faint Output - Power Out OK
  80. A very weird problem w/ a Marshall amp head
  81. The order of tubes. Blackstar HT-100
  82. Gallien Krueger 200MB just started shorting
  83. 2x16ohm + 2x80hm, deville 4x10
  84. Help please- Marshall 8100-Low Volume on OD1 Channel only
  85. Embarrassingly Simple Roland JC-120 Question
  86. Laney LX65R Overdrive channel not working
  87. No lead channels with ENGL Powerball?!
  88. Cathode bias 6L6s, Voltage rise(50v) on one power tube when treble is turned up????
  89. Peavey VK100 with dead switching system
  90. final tests for repairs
  91. marshall valvestate VS265 problem
  92. Ampeg V4 eating tube s
  93. Odd voltages
  94. Static discharge causes amp noise?
  95. Black Widow Speaker basket interchange
  96. Hiwatt tubes?
  97. EVJ Roaring
  98. 5E3 amp output power question
  99. Roland Jazz Chorus JC-77 Hiss
  100. Marshall amp parts ?
  101. Fender Twin Reissue - phase inverter tube issue
  102. Randall RG100 trouble
  103. Help: DSL401 & Effects Pedals Fried from Bad Electricity?
  104. Marshall MG100DFX Volume Drop
  105. vox ac 30 tb6 standby not working, light good, new switch. Idears?.
  106. D Class amps - anyone got their minds around these yet?
  107. DC on Phase Inverter grids - what the? 93 Fender Blues Deluxe
  108. Laney LV300 Twin Servicing
  109. Distortion question
  110. AC30 reissue (PCB) blown Vscreen/preamp fuse
  111. Distorted squished tone from amp
  112. Behriger Europower PMP1280S low volume from output B
  113. Randall RG50-HT low clean volume
  114. help w/ peavey TNT 150
  115. Rattling sound in power tubes
  116. Electar Tube 30R ???
  117. Crate v50 SMPS not working
  118. Hoffman adjustable fixed bias mod question
  119. Bias Imbalance (leaky caps?!) sf princeton reverb
  120. Need help with Teisco preamp
  121. Bias in Fender amps - questions about voltages
  122. Silvertone 1481. New filter caps. Blown resistor.
  123. Acoustic 220 power amp
  124. Aguilar schems/help
  125. Leakage in Fenderish amp - channel two not silent
  126. Bedrock 600 - Lower Reverb Gain, how to
  127. A few troubleshooting questions; intermitten buzz
  128. new to forum, static like sound at all volumes
  129. Tektronix 2205
  130. Need source for wire for 2 button footswitch for vintage blackface
  131. Losing the sound
  132. Question about Deoxit
  133. Tapping sound in Fender tremolo
  134. nashville400 pop and squeal
  135. Fender Rocpro 700 problem
  136. What to do when playing in countries with no ground installation?
  137. Amp buzz / rattle / hiss on certain notes
  138. so cal 50 main fuse blows
  139. Peavey KB4 very noisy
  140. noise
  141. '65 Twin Reverb connector quandry
  142. Blackstar HT-100 Head with runaway Bias... Schematic needed!
  143. Marshall AVT150 Problem
  144. Need Amp Repail help??
  145. Roland Cube 20xl signal cips when using headphones.
  146. Hum/Noise on power up
  147. Replacement Tremolo Optocoupler for a Ampeg G15 Gemini II
  148. Marshall DSL 100 full stack mystery!!!
  149. Randall V2 power amp problem
  150. Gibson Hawk trem
  151. Kustom KGA65 Resistor Value
  152. Ghost notes or something more sinister??
  153. Fender 5a3 Deluxe service?
  154. The trouble with my fender stage 160
  155. Reverb issue
  156. 68 Deluxe Reverb seems to drop in volume
  157. Amp turns on, then volume falls and sound gets distorted
  158. KORG Concert C-50 conductive rubber
  159. Rhodes Question
  160. Silvertone 1474 Quit Working (Help)
  161. Peavey Butcher getting no sound from one speaker jack
  162. Fender Hot Rod Deluxe makes no sound
  163. Phase Inverter hum
  164. '02 Snakeskin Hot Rod Deluxe
  165. strange noise in my 66 blackface fender twin not re issue
  166. Trouble With New (Old) Peavey Bandit
  167. Ampeg V4 arcing
  168. KOCH amp help
  169. Silvertone 1465 output transistors
  170. No sound, hum or buzz from Custom Kraft N100X
  171. 73 Silver face twin...continuation :)
  172. Marshall VS65R problem
  173. Kustom Groove Bass oscillating with 69kHz - why ?
  174. Fender 700 Roc pro reverb Humming noise
  175. Fender Hot Rod Deluxe Died Suddenly
  176. Gallien Krueger GMT 600B amp
  177. Reverb hum
  178. Marshall JCM800 power/ biasing
  179. Laney HC50B replacement speaker help
  180. Fender Super Champ XD
  181. Tone Knob Inducing Hum/fuzz?
  182. Super 5E3 clone 25W, just too quiet! Normal?
  183. Custom Build w/ Problems
  184. Silverface Champ filter cap
  185. Marshall Parts
  186. Electrolytic Cap on Fender Champ 6v6 keeps exploding/HELP!
  187. Bias help please.
  188. Piezo bridge and emg's???
  189. Hum Reduction - Heater DC offset
  190. 1987 Polytone Minibrute IV speaker pops on shutoff
  191. power tube replacement question
  192. Amplifier Upkeep
  193. Irregular package or not? From UPS
  194. Need schematic and parts for AVT150
  195. Please help - Converting Mesa 2:90 from 117v to 230v
  196. RG Thomas Organ
  197. Peavey windsor loss of volume
  198. Amp static upon power up/down. Goes away quickly.
  199. Noise on a Panocordian Amp
  200. Watkins 14w Westminster/ dominator /marshall 18w tone and trem issues
  201. Best Grounding Scheme for a Princeton Reverb
  202. Classic 50 12AX7 voltages
  203. vox ac30cch tube question
  204. 1970 Ampeg SVT Troubleshooting Questions. Calling on SVT Experts!
  205. Amp Screeching, Voltage leak?
  206. Fender M-80 Head, 8ohm input jack broken
  207. Champ Red Plating
  208. Peavey "Musician" Blowing Speakers
  209. Worked first, now fuzzy/compressed sound, overdissipating valves
  210. Acoustic 370 Repair Procedure
  211. '59 Bassman RI eating power tubes
  212. Fender Roc Pro 700 Humming Noise
  213. Fender Jazzmaster Ultralight
  214. Quick Pot Question
  215. Fender Frontman 25r clean channel problem...
  216. Fender parts
  217. Mesa 2020 Tube Amp Volume Loss
  218. Fender Pro Junior - Weird Volume Pot Behavior
  219. When to replace a fan
  220. Fender BXR60 blowing fuses
  221. SWR WorkingPro 2x10c distortion issue
  222. Power Supply problems
  223. Rebiasing Original Fender Blues Deluxe
  224. 73 Silver face Twin Reverb ?
  225. Cooling spray as a way to find maul function..?
  226. Distortion and crackle sound with laney bass amp
  227. Peavey Classic 50 Equalizing Issues
  228. Valvking 212 Blowing Fuses in Power Stage
  229. Vox AD15VT distortion and low output on manual setting
  230. Bias/balance question for Blackface Super Reverb
  231. Peavey Classic 50 Sparking Tube Pin
  232. Thomas Vox replacement transistors
  233. Pignose G40V?
  234. Peavey Classic A series-Low Volume
  235. Burning resistor on my Road 220
  236. Ampeg B15n--whats the output bias supposed to be?
  237. Built a P-P 6k6 based guitar amp. jcm800 and 5e3 inspired. Need to work out one issue
  238. Peavey JSX212 Repair - Crackling & Hum
  239. Quick MARSHALL AVT150 Power Module Question
  240. 1 month old Bugera 333XL12 amp made popping sound and died.
  241. SF Super Rreverb Oscillation?
  242. Crate Vintage Club 50 Issues
  243. SVT 4 pro Issue
  244. 5e3 build start up issue
  245. My supro is silent... dead silent
  246. Repairman in Los Angeles?
  247. Dead OT?
  248. Hot Rod Deville Bias Question
  249. Marshall MG100dfx Weirdness
  250. Yamaha G100 - fried voltage regulator?