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

  1. Speaker-related dumb question: speaker SIZE
  2. Speaker Protection help
  3. Univox Bias questions HIGH VOLTAGE!!!
  4. Midi Problem: Loose all programs when turning off amp
  5. AC filaments too hot!
  6. Princeton Problem
  7. Marshall DSL 50 still passing signal with the volumes on 0?
  8. Trace Elliot AH300 GP12 series6
  9. Vox AGA-70 DI mod request schems needed.
  10. Mesa Boogie Lone Star Special
  11. Trace Elliot AH300 outputs
  12. Marshall TSL100 Problems
  13. Marshall TSL100 Problems
  14. Mesa Boogie Mark IV one 6L6 red plating and loud hum.
  15. Secondary PT voltages for 5150?
  16. Help with early 50s Danalectro Challenger
  17. Bias set point for 8417s
  18. Running iPod into 6AU6 input...
  19. Hot looking anode/plate resistors.
  20. 1961 Ampeg Reverbrocket (May 1961)
  21. Very Strange Problem Fender Princeton 112 Plus
  22. B52 At-212 with intermittent problem
  23. Musicman RD 50 schematic question
  24. Roland re201 echo
  25. Voltage modification for fender superchamp xd 110v to 220v
  26. Needle Nose Pliers??
  27. Vibrolux reverb custom issue
  28. Fender Champ 12 red-knob channel switching problem
  29. Where Can I Find Capacitors??
  30. Traynor YGM4 hum. Need some expert advice/input
  31. JCM900 2100 Power Tube Bias question
  32. Peavey Classic VTX 2 12 Questions
  33. '74 Mk II Super Bass: grid resistors
  34. very loud popping-Roland Bolt 60
  35. DR AB763
  36. GK MB150 resurrection?
  37. Kustom Quad 200 HD
  38. Traynor Reverb Mate 40 strange breakup
  39. 1997 SWR california blonde I REALLY odd problem.. HELP
  40. Anyone know the average mV output of a guitar pickup (single coil)
  41. A quick one:use MKT GPF or something else?
  42. Peavey Musician 400 Distortion and Fuzz sound faint.
  43. Channel Switching problem on Carvin Belair amp
  44. Behringer BX300T dead amp
  45. Need help identifying tube/socket wiring in a homebrew amp.
  46. Amp blowing fuses
  47. Fender Red Knob Twin 2nd channel high pitch squeal/ whistle another cause?
  48. Trace Elliot AH-300 'increase input' green LED
  49. help need on bx1200
  50. Peavey Valveking troubles
  51. Fender 6G6-B Bass Input Side - Little to no Bass Response from Bass Pot
  52. Marshall DSL50 No Output - how big a voltage swing should I see at output tube grids?
  53. Anyone interested in a Mesa Boogie 50 Cal + head ?
  54. Help with a LAB SERIES L5 (2x12 100W SS amp)
  55. Peavey Triumph 60
  56. AB763 Twin filter cap question
  57. Peavey Special 130 problem.. light is on but no sound....
  58. The Deluxe Reverb Ocean mod...
  59. 5E3 build
  60. Spider II - no sound
  61. reverb circuit clipping/spiking
  62. Marshall MG TDA7293 PCB Assembly Wired Backwards??? Help!
  63. Fender Ultimate Chorus chassis removal
  64. Blonde Bassman Wow a lotta gain
  65. Peavey CS800x problem - Smell it getting hot when powered on - HELP!
  66. Something fried in my Marshall "Studio 15"
  67. Peavey Triumph 120 channel switching problem
  68. needed schematics yamaha undred 115
  69. Mackie SRS1500
  70. Deluxe reverb V5 pin readings way off
  71. Markbass Little mark 800 tube manual?
  72. Polytone Mega-Brute clipping early
  73. Acoustasonic 30 DSP
  74. Heads up: Mar$hall Valvestate pwr switch source
  75. Whats a good approach to fixing solid state output stages
  76. Ramsa WP-9110 amp runs warm when idle
  77. Low headroom from Sunn Solos II
  78. Vox Cambridge 30 Repair/Questions
  79. VHT G100-CL Bad Sound Issue
  80. Sveltana Wing-C tubes out of production
  81. Peavey ultra 120 + no sound/ only two preamp tubes glow
  82. Magnavox Astro-Sonic wont spin at slower speed settings
  83. Old tube amp sounds good only at full volume
  84. Jfet muting
  85. tubes redplating when signal applied
  86. Mesa Boogie F-30 Issues. Need urgent HELP. Please...
  87. Traynor YGM3 very low volume
  88. Vendor for Eyelet Fiberboard Needed - Mine is out of stock
  89. DR normal channel problem
  90. Blackstar Artisan 100 OT
  91. Fender Super Reverb RI rattling
  92. Source of Ampeg switches
  93. A question on hum ?
  94. JBL SF15
  95. Mitchell "Deluxe" combo amp
  96. Source for Transformer
  97. Schematic for a Crate GFX50
  98. 5E7 Problem and need help - ratty distortion at all volumes (Other post disappeared)
  99. 75 Deluxe Reverb
  100. Vox AC50 CPain in the &^%
  101. Crackles/Pops in JCM800 Build
  102. Ashdown ABM 500 EVO Issue
  103. Sudden volume jumps
  104. Korg C-4000 digital piano, no sounds
  105. Original Marshall Tube Identification Question - JCM 800 4010 (2204 Circuit)
  106. Another new build 5E7 problem thread - ratty terrible distortion at all volumes
  107. Alto PBM8-250
  108. Marshall MG50CFX
  109. Marshall JTM 60 filter cap and Bridge rectifier advice
  110. effects loop
  111. Marshall tsl122 Bias problem
  112. Fender Twin Power Transformer - is she dead Jim?
  113. Magnatone Ultralinear OT tap identification
  114. Bad crackling noise with larger input signals, New build
  115. remove post, fixed
  116. Anyone work on a Fender red knob Super 60?
  117. 5F6A - hum with added gain stage
  118. Very Low volume problem
  119. Kustom 2x10 Amp Issue
  120. Very Low volume problem
  121. Marshall VS65R valvestate Output transistor biasing
  122. Marshall gold-back 12" speaker testing
  123. Blues Jr power tubes not lighting up
  124. Bad hum on initial power up/first bias setting
  125. Bugera amp issue
  126. Fender Champ Capacitors and other issues
  127. Will Tung Sol 7581's work in my '83 Fender Concert II.
  128. Bias issue
  129. Helllllllllp !!!
  130. Power switch for Valvestate: Source?
  131. Wall isolation transformer
  132. Testing an output transformer...
  133. Ampeg BA115HP tuner oscillations
  134. Ampeg B5R: Overdrive channel always on
  135. Fender Super 60 Voltage Questions?
  136. Ampeg SB12 volume pot hum... but only when turned down?
  137. DC on opamp outpin
  138. Marshall dsl 401 reverb
  139. Hum in Fender Vibro Champ
  140. rec 4 replacement PT Ampeg B15--Edcor?
  141. How do I check output voltage on my Marshall Super Lead 100 vintage 1971 head?
  142. Elk Echo Sonic, anyone?
  143. Fender 65 Deluxe Reverb
  144. Benefits of using a scope?
  145. do I really have to pull the ckt bd to change the PT in Ampeg B15?
  146. Ampeg SVT CL
  147. Acoustic 117 rectifier specs
  148. Compu-Bias Meter Chip ?
  149. Mesa Boogie Recto 3ch - NO clean channel
  150. JCM 2000 TSL 122 FX Loop Buzz
  151. 117 volt transformer for a Marshall Valvestate VS100R
  152. Bandmaster Reverb Issue
  153. Old Peavey Minx sputtering at high volumes
  154. Crate vintage club 30 no sound
  155. Road King II conversion from 110v to 240v with TAD Power Transformer
  156. SVT-VR hum question
  157. Ampeg SJ12-T Trem on the fritz
  158. peavey musician mark III 400 GH 1978... loud constant buzz
  159. Reverb shuts off when amp gets hot
  160. Road King II Power Transformer Change from USA to 240v
  161. JJ vs F&T 100uf/100uf cap cans
  162. New Tool For The Amp Toolbox
  163. Marshall JCM600 heater fuse blowing
  164. ab763 clone's volume is cutting out at high volume
  165. Bugera 1960 Swap out 5881s for 6L6GC Tubes - Necessary Mods?
  166. Sunn 200S
  167. AB763 Twin - Buzz when installed in cabinet only.
  168. Supro Thunder Bolt Cutting Out
  169. Bass cab making 'whoofing' sound. Specs included. What am I doing wrong?
  170. Warwick CL
  171. Selmer 100watt PA/4 motorboating ??
  172. Crate onboard amp tuner flashes, but does not work
  173. Need Help with Sick Working Dog Boxer - Anyone have one?
  174. Marshall jcm 2000 Dsl 100 problem red plating out put tube need help!!!!!
  175. Laney BC 75 schematic ?? Any one have a copy ??
  176. fender deluxe vintage modern
  177. Pot designations
  178. Webster 166-1 volume issue
  179. Yamaha/Phonic 740 info?
  180. Reading this forum in linear mode:
  181. Mesa Hearbreaker Intermittent Volume Loss
  182. Guyatone Flip MKII GA-2000 Amp - screen resistor values?
  183. Silverface Fender Twin has nasty bass distortion
  184. 90s Fender Pot
  185. Crate gt212 volume dropping
  186. Crate BT220 disassembly
  187. Welcome to Tech Jeopardy, I'll Take Transformers for $50 Alex
  188. Peavey classic 30 ghost note
  189. Peavey Mark III Loud 60hz? Humming
  190. Ampeg AM radio
  191. which are the decoupling caps?
  192. Crest CC2800 Help!
  193. Classic Rock in my Amp
  194. Peavey Classic 30 low output, what am I missing?
  195. Fender 6G6 Build w GZ34 - Transformer Suggestions?
  196. '63 Fender Bassman Brownface Project Needs A New Faceplate
  197. Mullard 12AX7 RI issue
  198. Switching Circuit Hum
  199. What's this in a Mesa?
  200. 1975 Fender Pro Reverb P/P Master w/5AR4 - Schematic?
  201. Laney AOR Series Pro Tube 50 power transformer specs
  202. 75 Bassman Ten normal channel bass control not working.
  203. Fender stage lead II channel switch
  204. Laney VC15 channel switch problem...??
  205. Sound City - Concord - Tube Amp - No Signal - Please HELP
  206. GK400RB-III 1 output blown
  207. Lone Star Special screen resistor value
  208. Fender Blues Junior
  209. Fender Electronic Echo Chamber
  210. I dropped my amp and now it hisses again! Help!
  211. Gibson G 30
  212. Can cap replacement for 78 Vibro champ
  213. Strange sounds from a Peavey Butcher
  214. Need help with EA-28RVT Epiphone
  215. Ampeg Gemini 2 standby switch
  216. blues jr - 20v difference on each side of OT
  217. De-humming an Ampeg B-12-XY...........
  218. Hiwatts"Custom 20" ptp
  219. Silverface Champ PT wiring
  220. Bugera joke?
  221. Maine Amplifier Reverb Tray
  222. Am I burning up my EL84 tubes with a 439V anode?
  223. Traynor YGM-4 Hum
  224. Powerup thump Valvestate 8200
  225. Orange Tiny Terror 7/15 watt..... power but no sound
  226. Fender TV front pro amp serial number 733 need speaker
  227. Ideas for intermittent on Gallien Krueger 1001RB
  228. 5E3 using Hammond 291BEX
  229. Traynor YBA-3 Power Xformer making arching noise, Is it about to fry?
  230. 1M pots measuring 500k...? And other pot problems.
  231. What can you tell about a power tube's condition when visually inspecting it?
  232. Marshall dsl 100
  233. Ampeg v-6b multitap inductor replacement ideas?
  234. Dead Selmer treble 'n' bass 50 SV
  235. Valve orientation tab broken... recommendation
  236. Fender Super Reverb RI ugly low volume distortion
  237. Pignose Swallows 30 Watt Speaker
  238. Princeton Silverface Reverb Problem
  239. Peavey 5150 II no sound. SEARCHED ALL OVER! PLEASE HELP!
  240. Low bias on Rivera Pubster
  241. Fishman Loudbox Pro - intermittent output
  242. Fender champ 25 '92 bias
  243. Bad House Power Causing Bad Tone?
  244. Replacing 6L6s with 5881s - JMF Spectra 60t - No Bias Adj - Mod Suggestions?
  245. Getting shock on input jack of a Canadian-Noname-Pepco
  246. Univox U-45B Low, Distorted Output
  247. Help Troubleshooting 60's Deluxe Reverb AB163 Amp
  248. Vintage Club 30 Distortion problem
  249. Marshall AVT 150 no effects
  250. Silvertone 1484