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View Full Version : Maintenance, Troubleshooting & Repair



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  1. Fender Twin Reissue - phase inverter tube issue
  2. Randall RG100 trouble
  3. Help: DSL401 & Effects Pedals Fried from Bad Electricity?
  4. Marshall MG100DFX Volume Drop
  5. vox ac 30 tb6 standby not working, light good, new switch. Idears?.
  6. D Class amps - anyone got their minds around these yet?
  7. DC on Phase Inverter grids - what the? 93 Fender Blues Deluxe
  8. Laney LV300 Twin Servicing
  9. Distortion question
  10. AC30 reissue (PCB) blown Vscreen/preamp fuse
  11. Distorted squished tone from amp
  12. Behriger Europower PMP1280S low volume from output B
  13. Randall RG50-HT low clean volume
  14. help w/ peavey TNT 150
  15. Rattling sound in power tubes
  16. Electar Tube 30R ???
  17. Crate v50 SMPS not working
  18. Hoffman adjustable fixed bias mod question
  19. Bias Imbalance (leaky caps?!) sf princeton reverb
  20. Need help with Teisco preamp
  21. Bias in Fender amps - questions about voltages
  22. Silvertone 1481. New filter caps. Blown resistor.
  23. Acoustic 220 power amp
  24. Aguilar schems/help
  25. Leakage in Fenderish amp - channel two not silent
  26. Bedrock 600 - Lower Reverb Gain, how to
  27. A few troubleshooting questions; intermitten buzz
  28. new to forum, static like sound at all volumes
  29. Tektronix 2205
  30. Need source for wire for 2 button footswitch for vintage blackface
  31. Losing the sound
  32. Question about Deoxit
  33. Tapping sound in Fender tremolo
  34. nashville400 pop and squeal
  35. Fender Rocpro 700 problem
  36. What to do when playing in countries with no ground installation?
  37. Amp buzz / rattle / hiss on certain notes
  38. so cal 50 main fuse blows
  39. Peavey KB4 very noisy
  40. noise
  41. '65 Twin Reverb connector quandry
  42. Blackstar HT-100 Head with runaway Bias... Schematic needed!
  43. Marshall AVT150 Problem
  44. Need Amp Repail help??
  45. Roland Cube 20xl signal cips when using headphones.
  46. Hum/Noise on power up
  47. Replacement Tremolo Optocoupler for a Ampeg G15 Gemini II
  48. Marshall DSL 100 full stack mystery!!!
  49. Randall V2 power amp problem
  50. Gibson Hawk trem
  51. Kustom KGA65 Resistor Value
  52. Ghost notes or something more sinister??
  53. Fender 5a3 Deluxe service?
  54. The trouble with my fender stage 160
  55. Reverb issue
  56. 68 Deluxe Reverb seems to drop in volume
  57. Amp turns on, then volume falls and sound gets distorted
  58. KORG Concert C-50 conductive rubber
  59. Rhodes Question
  60. Silvertone 1474 Quit Working (Help)
  61. Peavey Butcher getting no sound from one speaker jack
  62. Fender Hot Rod Deluxe makes no sound
  63. Phase Inverter hum
  64. '02 Snakeskin Hot Rod Deluxe
  65. strange noise in my 66 blackface fender twin not re issue
  66. Trouble With New (Old) Peavey Bandit
  67. Ampeg V4 arcing
  68. KOCH amp help
  69. Silvertone 1465 output transistors
  70. No sound, hum or buzz from Custom Kraft N100X
  71. 73 Silver face twin...continuation :)
  72. Marshall VS65R problem
  73. Kustom Groove Bass oscillating with 69kHz - why ?
  74. Fender 700 Roc pro reverb Humming noise
  75. Fender Hot Rod Deluxe Died Suddenly
  76. Gallien Krueger GMT 600B amp
  77. Reverb hum
  78. Marshall JCM800 power/ biasing
  79. Laney HC50B replacement speaker help
  80. Fender Super Champ XD
  81. Tone Knob Inducing Hum/fuzz?
  82. Super 5E3 clone 25W, just too quiet! Normal?
  83. Custom Build w/ Problems
  84. Silverface Champ filter cap
  85. Marshall Parts
  86. Electrolytic Cap on Fender Champ 6v6 keeps exploding/HELP!
  87. Bias help please.
  88. Piezo bridge and emg's???
  89. Hum Reduction - Heater DC offset
  90. 1987 Polytone Minibrute IV speaker pops on shutoff
  91. power tube replacement question
  92. Amplifier Upkeep
  93. Irregular package or not? From UPS
  94. Need schematic and parts for AVT150
  95. Please help - Converting Mesa 2:90 from 117v to 230v
  96. RG Thomas Organ
  97. Peavey windsor loss of volume
  98. Amp static upon power up/down. Goes away quickly.
  99. Noise on a Panocordian Amp
  100. Watkins 14w Westminster/ dominator /marshall 18w tone and trem issues
  101. Best Grounding Scheme for a Princeton Reverb
  102. Classic 50 12AX7 voltages
  103. vox ac30cch tube question
  104. 1970 Ampeg SVT Troubleshooting Questions. Calling on SVT Experts!
  105. Amp Screeching, Voltage leak?
  106. Fender M-80 Head, 8ohm input jack broken
  107. Champ Red Plating
  108. Peavey "Musician" Blowing Speakers
  109. Worked first, now fuzzy/compressed sound, overdissipating valves
  110. Acoustic 370 Repair Procedure
  111. '59 Bassman RI eating power tubes
  112. Fender Roc Pro 700 Humming Noise
  113. Fender Jazzmaster Ultralight
  114. Quick Pot Question
  115. Fender Frontman 25r clean channel problem...
  116. Fender parts
  117. Mesa 2020 Tube Amp Volume Loss
  118. Fender Pro Junior - Weird Volume Pot Behavior
  119. When to replace a fan
  120. Fender BXR60 blowing fuses
  121. SWR WorkingPro 2x10c distortion issue
  122. Power Supply problems
  123. Rebiasing Original Fender Blues Deluxe
  124. 73 Silver face Twin Reverb ?
  125. Cooling spray as a way to find maul function..?
  126. Distortion and crackle sound with laney bass amp
  127. Peavey Classic 50 Equalizing Issues
  128. Valvking 212 Blowing Fuses in Power Stage
  129. Vox AD15VT distortion and low output on manual setting
  130. Bias/balance question for Blackface Super Reverb
  131. Peavey Classic 50 Sparking Tube Pin
  132. Thomas Vox replacement transistors
  133. Pignose G40V?
  134. Peavey Classic A series-Low Volume
  135. Burning resistor on my Road 220
  136. Ampeg B15n--whats the output bias supposed to be?
  137. Built a P-P 6k6 based guitar amp. jcm800 and 5e3 inspired. Need to work out one issue
  138. Peavey JSX212 Repair - Crackling & Hum
  139. Quick MARSHALL AVT150 Power Module Question
  140. 1 month old Bugera 333XL12 amp made popping sound and died.
  141. SF Super Rreverb Oscillation?
  142. Crate Vintage Club 50 Issues
  143. SVT 4 pro Issue
  144. 5e3 build start up issue
  145. My supro is silent... dead silent
  146. Repairman in Los Angeles?
  147. Dead OT?
  148. Hot Rod Deville Bias Question
  149. Marshall MG100dfx Weirdness
  150. Yamaha G100 - fried voltage regulator?
  151. Krankenstien plus amp thats drawing alot of current
  152. In need of firmware for Line 6 Spider II 30 amp
  153. Champ Silverface Question
  154. JTM45 Pot Values
  155. Hot xformer
  156. Headphone jack for a Marshall VS265
  157. harmony 415c trem help
  158. Peavey TNT 115 Scorpion constant Humming all the time
  159. Molex connector arcs
  160. Buzzing power transformer fix
  161. Marshall Valvestate 8080 dead effect loop
  162. Peavey 5150 effect loop bleed
  163. Classic 50 OT replacement
  164. AVT150 dead at gig but works when I got home
  165. marshall voltage selector
  166. peavey tnt 150 has a buzzing/ humming
  167. Carlsbro glx 150 head
  168. Marshall DSL 100 Redplating and POP goes the fuse!
  169. Crate Stelth GT50 modification
  170. Newbie - How much damage did I do?
  171. Fender 57 Twin HW Reissue
  172. Ac30cc2 problems
  173. fender stage 100 combo no volume
  174. Peavey F-800G Super Festival Series Amp goes from bad to worse...
  175. Fender Rhodes
  176. Question about power consumption (Mesa Cal+ 50 head)
  177. Transformer hum?
  178. JCM 2000 problem
  179. Mesa MkIII issue
  180. Possible reasons for electric shock
  181. Reverb Wet/Dry Mix Problem
  182. failing cap residual AC question and another buzz/humm thread
  183. Peavey TKO 115 repair help
  184. How low is too low (heaters)?
  185. Twin Reverb.... PT bad ?
  186. MosValve mosfets?
  187. Blues Junior power transformer smoking - can it be rewound ?
  188. Laney bass amp blows output transistors!
  189. Trace Elliot Bass amp repair
  190. Need help diagnosing a 70's vintage PA
  191. B52 Stealth 60W head reverb tank
  192. Ampeg SVT-4 Pro
  193. Weird voltage reading Selmer
  194. WT 400 enhance circuit and di problem
  195. Sunn 300 Coliseum Troubles
  196. general tips for isolating noisy component
  197. What's the buzz on hum in old tube amps?
  198. Fried BF Bassman Heater CT!
  199. SUNN Model T 2nd Gen Power up ?
  200. PEAVEY Special 130 noise problem
  201. Randall RG50TC low low low output....
  202. Repairing Acoustic G60T Amp Head
  203. GK Backline 210 makes crackling noise when playing in low register
  204. Yamaha T50C - need advice
  205. Sunn 200s multicap can, etc. replaced but showstoping problem persists
  206. Strange problem with Peavey Classic 30
  207. Lead Free Solder
  208. Seymour Duncan convertable 60 watt low volume probs ... HELP !
  209. have a better one
  210. 66 Super Reverb no so super sounding
  211. Peavey Valveking volume drop in lead channel
  212. Carlsbro 50Top bias problem
  213. Fender Acoustasonic 30 problem - Noise on Reverb only... HELP?!
  214. Mesa noise?
  215. dying '77 peavey classic 50 212
  216. Unstable Bias, blowing fuse
  217. Peavey Bandit 65 - Sounds awful - looking for some help!
  218. Marshall Valvestate 265 with one channel hum
  219. Nuts for Jacks & Pots
  220. Fender Bassman SP3100 acting weird (again :P ) Cap problems?
  221. bias question
  222. Cerwin Vega BG-250 amplifier, starving output
  223. Y2 Class EMI Suppression Capacitor - "Death Cap"
  224. Crate BV 60 Blue Voo Doo - Master Volume pot replacement.....
  225. Tiny terror trouble
  226. Fender Hot Rod Deluxe- Cutting out and dirty
  227. super reverb earth issue
  228. Marshall AVT 20 Hum
  229. Sano oscillation
  230. Peavey Vypyr 75 question
  231. Peavey 5150 head won't power on!
  232. MusicMan 2475-75 Problem
  233. Blues Junior question
  234. Peavey Encore 65 - need help troubleshooting
  235. Bad Cat Hot Cat ?
  236. Peavey Classic 50 - 212
  237. Marshall 8100 output transistor
  238. Kustom 200 Blowing Fuses
  239. 63 vibroverb reissue--reverb problem
  240. Silicone and others
  241. resurrecting Avometer 8
  242. Fender switching pots?
  243. POG bad DSP?
  244. help with dropping voltages in secondaries
  245. Is my Gibson Atlas blowing up my tubes or am I just unlucky?
  246. Sunn 1200S
  247. 6V6GTA plate dissipation in cathode bias push pull amp
  248. Huge difference in bias readings from tube to tube on matched sets
  249. Mesa/Boogie S.O.B. tube question/idea
  250. Mesa Nomad 45 - Strange Power Transformer Conundrum