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View Full Version : Maintenance, Troubleshooting & Repair



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  1. old Egnater ie4 preamp died!, smells burnt!, help!
  2. 120 Hz hum on a solid state amp is usually...
  3. Blues DeVille pots?
  4. Geloso G226-A troubles
  5. squealing reverb in a Supro Corsica
  6. Fender Frontman FM25R channel switching problem
  7. Ashdown thermal problem
  8. Ab763 weak tremolo issue
  9. figuring out rectified DC volts; reversing a transformer
  10. Need a CTS pot for Crate amp?
  11. I'm looking for the red led for a 4 button Fender Twin Amp footswitch
  12. Am I missing something??
  13. Roland Cube 60 has 50 mV of DC offset.... What is considered too much?
  14. Yamaha G100-112 series II - parametric EQ pops
  15. need part # for VOX
  16. DUH!
  17. Deluxe Reverb rectifier tube
  18. Peavey Butcher Low Voltages
  19. crate gx-130c
  20. voltage divider for a power source
  21. Bugera Amps
  22. Peavey XXX and JJ E34L problem???
  23. Gemini VI GS-15R Schematic question - balance the output tubes
  24. Fender Vibro-King CSR4 tremolo speed issue...
  25. Sovtek Mig-60 blowing fuse
  26. Where can I find a 10k Audio slider control for my old Carvin
  27. Fender Studio Amp grill cloth trim
  28. Bassman20 Fun&Games&Agony
  29. bizarre power supply issue
  30. Blackheart LG Head - no sound
  31. Marshall Valvestate 80V (8080) problem
  32. Hot Rod deluxe intermittent volume loss problem
  33. Tube Amp Shutting Off
  34. Tube blown or what?
  35. Any of you a T.C. Electronics warranty station? Need a part
  36. Biasing A Red Knob Dual Showman
  37. Variac (GE Volt-pac) Wiring Guidance Requested
  38. Fender M80 bass amp distortion on output
  39. peavey mace power transformer failure
  40. Peavey TKO bass amp
  41. irritating "sheen" on "A" notes
  42. Gibson GA 20 RVT - Tremelo Opt-coupler (500) replacement?
  43. Connector Problems
  44. Low distorted output, no channel switching on Blues Deluxe
  45. Champ blowing fuse
  46. Ampix
  47. SWR SM-900 Troubles
  48. replacement rectifier
  49. Signal related crackle
  50. Kustom PC 5065
  51. JCM800 head with oscillating volume + pops and hum
  52. AC30 with intermittent volume
  53. What's the best glue to secure filter caps?
  54. 4x6v6 amp not loud?
  55. HotRod Deville motorboats only on Drive channel
  56. Peavey VTM 60
  57. Peavey Classic 30 cant handle low end from 2001 Gibson R8 Les Paul
  58. Peavey Windsor Studio The output tube el 34 bournd out
  59. Is this a screen resistor problem?
  60. Laney L5-112T efx loop problem.
  61. Peavey classic 50/50 240V wiring
  62. Carlsbro GLX 80 Limited Edition - Crackling on clean channel
  63. DIY AA764 Champ Squeals Loudly
  64. How do I open a Fishman Loudbox?
  65. Is anybody familiar with the Peavey Classic 100 top?
  66. Bugera 333xl Sudden Reverb Circuit Hiss
  67. 5150 II tubes
  68. Acoustic G60T Combo - No channel switching
  69. Boston area source for tubes and amp parts
  70. Bad Cat Hot Cat "Gain" channel static noise?
  71. Need a replacement tube/pwr supply pcb for DSL100
  72. Blackstar 100 head, power tubes redplate
  73. Vintage amp issues
  74. Cathode bias *cap* issue - weird whistle
  75. Need help with a Fender Stage 160
  76. Crate V100H, Loud Technologies, Parts, Replacement Power Supply
  77. Weird bias loss!
  78. Marshall tsl fx loop bleed - help needed!
  79. 65 Twin Reissue problems
  80. Ampeg BA-115T keeps blowing fuses!
  81. Fender stage 100 blowing outputs
  82. measuring low value resistors
  83. Marshall MG15DFX clicking andpopping when turned on
  84. AVT 150 problem please help me
  85. SWR 350 problem
  86. silvertone 1484 filter cap can replacement
  87. How can I reduce hum in a Fender Champ?
  88. keep blowing the same capacitor
  89. Kustom K50 Main PCB Mounted 'Can' Style Diode(?) Help
  90. Ampeg SVT 3 pro PT secondaries
  91. Em field from tube amp rack style mounting
  92. Opto-trem driver tube bias?
  93. Peavey F800G Falling apart, Motorboating
  94. Vibrato does not work.
  95. Troubleshooting Blown Fuse
  96. Any buzz hum troubleshooting ideas for Hiwatt pcb?
  97. SF VIbro Champ Really Low Volume, Clean All the Way Up
  98. Hartke HA2000 powers up-no output
  99. Mesa Triple Rectifier Serial Loop Mod-Problem
  100. no sound lifco 630
  101. Peavey TNT 130 Board troubleshooting
  102. Marshall MG250-DFX
  103. Screen Grid Resistors
  104. What are indications of output transformer going bad??
  105. Where can I buy Ashdown knobs?
  106. princeton reverb problem
  107. Silverface Princeton caps
  108. begging for a helping hand, TSL 100
  109. Magnavox 5f1 tweed style tweed low watt style transformer issues
  110. peavey 5150 setup
  111. Feedback Problems Krank Rev 50
  112. Amp has started to howl and squeal: I need advice
  113. Foot switch education please
  114. Hot Rod deluxe signal when clean volume off
  115. Fender SRRI problem
  116. Crate GT 200 Lead channel Too Much distortion
  117. marshall jcm 800 distortion channel not fucntioning properly
  118. Replaced power transformer, now my amp is really quiet
  119. 65 Princeton Reverb
  120. Carvin AG100D input problem
  121. Kalamazoo Model 1 has developed some hum
  122. Now what?!?
  123. Randall Rg100es - Red chanel barley works
  124. Plexi Volume Trouble
  125. How hot is too hot?
  126. Fender Bandmaster
  127. Hiss and Hum?
  128. Fender Twin Amp buzzing coming from circuit board!?
  129. Crate V50 now the relay?
  130. Problems with peavey 5150 II distortion channel
  131. 1970's Peaveay "Classic" (not classic, 30 or 50) Low Volume Problem
  132. Peavey 5150 combo
  133. Any max temp specs for common tubes?
  134. Marshall AVT 150HX No Power
  135. Yes, size does matter. Or not? (Transformer Question)
  136. Traynor Bass mate
  137. Troubleshooting Marshall Mark II 100W Lead Master Vol. Model 2203
  138. 73 Blackfaced Twin buzzing on low notes
  139. Fender Blues Deluxe isssues..
  140. Amp Hum- Crate G-60
  141. Looking to apply some T.L.C (Heath TA-16)
  142. Mag 300 Drawing too much current? Blows fuses.
  143. 2 stroke/ Angela pse - hum but no guitar
  144. Fender Super-Sonic 22 Noise
  145. need help Marshall Mode 4
  146. Vox Super Foundation Bass problem
  147. New Output Transformer...worth it?
  148. which end is ground on this mylar bypass cap?
  149. Music Man 2275-130 redplating one side
  150. Behringer BX3000T start, shutdown problem
  151. Issue with Ampeg Gemini II chassis.
  152. Fender Blues Junior missing input beauty ring
  153. Marshall MG100DFX Faint Output - Power Out OK
  154. A very weird problem w/ a Marshall amp head
  155. The order of tubes. Blackstar HT-100
  156. Gallien Krueger 200MB just started shorting
  157. 2x16ohm + 2x80hm, deville 4x10
  158. Help please- Marshall 8100-Low Volume on OD1 Channel only
  159. Embarrassingly Simple Roland JC-120 Question
  160. Laney LX65R Overdrive channel not working
  161. No lead channels with ENGL Powerball?!
  162. Cathode bias 6L6s, Voltage rise(50v) on one power tube when treble is turned up????
  163. Peavey VK100 with dead switching system
  164. final tests for repairs
  165. marshall valvestate VS265 problem
  166. Ampeg V4 eating tube s
  167. Odd voltages
  168. Static discharge causes amp noise?
  169. Black Widow Speaker basket interchange
  170. Hiwatt tubes?
  171. EVJ Roaring
  172. 5E3 amp output power question
  173. Roland Jazz Chorus JC-77 Hiss
  174. Marshall amp parts ?
  175. Fender Twin Reissue - phase inverter tube issue
  176. Randall RG100 trouble
  177. Help: DSL401 & Effects Pedals Fried from Bad Electricity?
  178. Marshall MG100DFX Volume Drop
  179. vox ac 30 tb6 standby not working, light good, new switch. Idears?.
  180. D Class amps - anyone got their minds around these yet?
  181. DC on Phase Inverter grids - what the? 93 Fender Blues Deluxe
  182. Laney LV300 Twin Servicing
  183. Distortion question
  184. AC30 reissue (PCB) blown Vscreen/preamp fuse
  185. Distorted squished tone from amp
  186. Behriger Europower PMP1280S low volume from output B
  187. Randall RG50-HT low clean volume
  188. help w/ peavey TNT 150
  189. Rattling sound in power tubes
  190. Electar Tube 30R ???
  191. Crate v50 SMPS not working
  192. Hoffman adjustable fixed bias mod question
  193. Bias Imbalance (leaky caps?!) sf princeton reverb
  194. Need help with Teisco preamp
  195. Bias in Fender amps - questions about voltages
  196. Silvertone 1481. New filter caps. Blown resistor.
  197. Acoustic 220 power amp
  198. Aguilar schems/help
  199. Leakage in Fenderish amp - channel two not silent
  200. Bedrock 600 - Lower Reverb Gain, how to
  201. A few troubleshooting questions; intermitten buzz
  202. new to forum, static like sound at all volumes
  203. Tektronix 2205
  204. Need source for wire for 2 button footswitch for vintage blackface
  205. Losing the sound
  206. Question about Deoxit
  207. Tapping sound in Fender tremolo
  208. nashville400 pop and squeal
  209. Fender Rocpro 700 problem
  210. What to do when playing in countries with no ground installation?
  211. Amp buzz / rattle / hiss on certain notes
  212. so cal 50 main fuse blows
  213. Peavey KB4 very noisy
  214. noise
  215. '65 Twin Reverb connector quandry
  216. Blackstar HT-100 Head with runaway Bias... Schematic needed!
  217. Marshall AVT150 Problem
  218. Need Amp Repail help??
  219. Roland Cube 20xl signal cips when using headphones.
  220. Hum/Noise on power up
  221. Replacement Tremolo Optocoupler for a Ampeg G15 Gemini II
  222. Marshall DSL 100 full stack mystery!!!
  223. Randall V2 power amp problem
  224. Gibson Hawk trem
  225. Kustom KGA65 Resistor Value
  226. Ghost notes or something more sinister??
  227. Fender 5a3 Deluxe service?
  228. The trouble with my fender stage 160
  229. Reverb issue
  230. 68 Deluxe Reverb seems to drop in volume
  231. Amp turns on, then volume falls and sound gets distorted
  232. KORG Concert C-50 conductive rubber
  233. Rhodes Question
  234. Silvertone 1474 Quit Working (Help)
  235. Peavey Butcher getting no sound from one speaker jack
  236. Fender Hot Rod Deluxe makes no sound
  237. Phase Inverter hum
  238. '02 Snakeskin Hot Rod Deluxe
  239. strange noise in my 66 blackface fender twin not re issue
  240. Trouble With New (Old) Peavey Bandit
  241. Ampeg V4 arcing
  242. KOCH amp help
  243. Silvertone 1465 output transistors
  244. No sound, hum or buzz from Custom Kraft N100X
  245. 73 Silver face twin...continuation :)
  246. Marshall VS65R problem
  247. Kustom Groove Bass oscillating with 69kHz - why ?
  248. Fender 700 Roc pro reverb Humming noise
  249. Fender Hot Rod Deluxe Died Suddenly
  250. Gallien Krueger GMT 600B amp