View Full Version : Debugging Your Build

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  1. Need help to troubleshoot PTx and rectifier circuit (popping fuses)
  2. Stereo guitar amp trouble shooting
  3. Looking for info on filter capacitors
  4. First question on my build
  5. Crazy motorboating issue, Fender 5D5. Help!
  6. debugging adding reverb to deluxe
  7. 5F6A Bassman total custom build - super low output
  8. Does this amp schematic look usable
  9. microphonic resistor, or end of shielded cable?
  10. getting started Debugging a buzz/hum (AB763 deluxe, new build)
  11. Experiment - Combine a UL Pro Reverb and a Super Texan Circuit to make great AMP!
  12. 2 Channel Amp Help with squeal on one channel
  13. Deluxe Reverb Build Problem!
  14. JTM45 build presence oscillation
  15. 50w Plexi build -- odd operation
  16. Ampeg GU-12 build and tremolo not working
  17. Do you see anything in this circuit that could cause reverb ringing?
  18. AB764 Vibro Champ Build - Voltage Questions
  19. 5e9-a tweed tremolux build not tremoloing very much
  20. Deluxe Reverb (ab763) Reverb RCA's wiring
  21. New blackface-ish circuit with 6BM8 tubes, motor boating and some kind of ringing.
  22. New 18 watt lite build, faint buzz/distortion on low notes- HELP!
  23. Princeton Reverb build with pot for bias does not have enough negative bias voltage
  24. 12AU7 as a power tube red plating
  25. Amp kit build help
  26. Blackface Princeton Reverb with 2.x vac on grids of v1?
  27. Low Volume-weird EF86 plate voltage
  28. ac ripple on screen grids Ultralinear
  29. Tone stack not very responsive
  30. **Exciting reverb noise question**
  31. 1987 plexi circuit - cathode follower issues
  32. Reducing Noise
  33. 5F1 distortion and low volume proble with kit build
  34. Having a hard time debugging this one...
  35. early 60's 6g2 brown Princeton circuit
  36. 1974x ot?
  37. Intermitent squeal not affected by MV settings
  38. 5f1 build-reducing buzz/hum
  39. Dlx Rev rebuild- totally dead.
  40. Tremolo pedal switch- THUMP!
  41. Help with 120Hz hum issue on Bogner Clone
  42. What are some of your memorable build blunders?
  43. First start of new build
  44. Schematics Power Capacitors question
  45. 5e9-a build - sounds great - no trem
  46. 5E5-A Fender Pro 120 Cycle Hum
  47. 5f6a bassman - feedback oscillation? Help!
  48. Multiple issues with new build.
  49. Mojotone BF Bassman AA165 - No Sound
  50. more headroom for my PI
  51. SVT clone power supply high B+
  52. 18 Watt Lite HUM
  53. Fresh 5e9-a build sounds great but has two minor issues
  54. New JTM45 build-low power output, early distortion
  55. Leds to light up head like a Christmas tree!
  56. kalamazoo model one
  57. ceriatone 5f1 with junk parts voltage?
  58. Weber 6M45P blowing B+ fuse
  59. JCM800 input question
  60. Sunn 2000s clone motorboating
  61. plexi 50 watt clone with very strange issue - Non Tremolo making pi trem sounds ?...
  62. 5f1 saga... ground issue?
  63. ab763 pi saturation
  64. 5F10 insane tube current
  65. Eliminate transformer hum in reverb tank?
  66. 6V6 Plexi needs more watts
  67. DIY 18 Watt Question.
  68. Bassman AA864 hum trouble
  69. diode rectifier in a 5f2-a princeton - did I booboo?
  70. 5e3 weird voltages and B+
  71. Just finished a 6G5-A Pro copy -- inconsistency between layout and schematic --
  72. British 18watt Kit Tremolo Noise
  73. HELP! No sound on Clean Channel on Dual EQ SLO clone
  74. Calculating Dropping Resistors
  75. crazy crackle at start up
  76. 5f10 Harvard build -- input and bias issues
  77. Pop when switching NFB switch on 5F2A clone
  78. Name that hum - vibro champ build
  79. Indicator light on when amp is off??
  80. Minor debugging needed for 1987 Plexi
  81. last problem i hope, awful- awful squealing when dimed.
  82. power section needs "jump starting" every time i power it on/off
  83. low B+ voltage on a fresh 5f1 build
  84. OR120 build issue
  85. 5G9 DC on Volume pots
  86. Hiwatt DR103 build - Voltages too low
  87. JTM45 smoked resistor
  88. 5F1 cathode resistor voltage extremely high
  89. 2xEL84 amp with long-tailed pair PI - questions
  90. B15 Preamp issue
  91. 5F6A problem?
  92. Two issues with 6G3 build--hum and low preamp plate voltage
  93. phase inverter has too much gain
  94. 5E5-A low output volume
  95. New 5F2A, not sure voltages are good.
  96. no cathode voltage on 2/3 preamp stages
  97. 5F11 voltage/amps issue...not able to bias
  98. dropping resistors not dropping
  99. Biasing ?
  100. Reverb tank hum help please :)
  101. 5F1 New Build Very Low Volume
  102. Might be a dumb Q
  103. Trem switching weirdness HELP PLEASE
  104. Idle current going way too high
  105. Heaters blow fuse
  106. 6G2 uneven bias wiggle
  107. Ampeg B15 Build -- Bias supply question
  108. New OR120 build. Blown HT fuse = HALF voltage?
  109. Bad squealing in OR120 build.
  110. New build with a baffling problem
  111. Please help. Troubleshoot first build?!?!?
  112. JTM 45 build
  113. Clone of a Clone
  114. Motorboating issue on new build. Extension of the E88CC thread.
  115. So they sent me E88CCs ?
  116. New, First Build 18 Watt Marshall Clone No Sound.
  117. AB763 No verb, no vibe, 1 channel help
  118. Tremolo problem in modifed 5F11
  119. Matchless Tone Stack problems - help!
  120. BF Deluxe new build troubleshooting
  121. Crackles/pops in JCM800 build
  122. Hum issue in 18 watt 6bq5 build
  123. New 5F1 - Strange Problem - Low B+ with tubes plugged in
  124. Help with first build. 5F1 Champ
  125. new 5e3 build blowing fuse
  126. crosstalk and fizzyness in plexi se
  127. Homemade EL84 Push-Pull amp doesn't work
  128. Problem witjh Mojotone 5E8-A - Treble pot acting as Volume control
  129. Princeton AA964 clone low volume output and various other issues
  130. Can't get 5D8 Twin PI to balance!
  131. Weber 18 watt tmb help trebel and bass very scratchy mid ok, random pops static
  132. Fender twin reverb (ab763) PI trouble
  133. AA964 Princeton Squeal/Chirp on Power Off
  134. 5f1 slight audible oscillation
  135. Presence control strange behaviour
  136. Ampmaker Double Six power supply problem
  137. Problem with Mojotone 5F1 build - no sound
  138. magnatone 260 vibrato in fender super 5D4
  139. TUT 3 Plexi Build Parasitic Oscillation Problems - Strange one!
  140. Bugs in tube / mosfet trem
  141. Bad cat hot cat bias?
  142. Revisiting an Old Project 100w Plexi
  143. Hammond AO-35 Carmen Ghia conversion question
  144. Recent build is DULL sounding
  145. Two-stroke amp not making any sound
  146. Please help with my first build 5F1 with no sound
  147. Vibroverb 6G16 tremelo circuit
  148. More distortion from EF86's rather than headroom?
  149. Crazy 5f1
  150. Plexi50/JTM50 build
  151. Cathode bias 125% of max dissipation :O
  152. Help with grounding scheme in 18 watt clone
  153. 5F1 build developed squeal when on high volume
  154. power tranny?
  155. 18 watt TMB build,no sound?
  156. 20 watt Doberman transformer?
  157. Update on my 'New Champ Build Problems'...
  158. First 5E3 - Distortion,
  159. 18 watt TMB?
  160. First post and debugging dillema of trinity 5E3
  161. Replacing caps in tube amp
  162. Trying to blend (link) two channels tube preamp.
  163. 18 Watt gremlins - Need help (with audio clip)
  164. Weber 5F6A Noise
  165. 5F1 - Low Sound output
  166. 5f1 Build - Squeal - Pls Help
  167. are these voltages correct ?
  168. hum on stand by, any ideas ?
  169. What is wrong here? Newly built amp makes a weird noise!
  170. '65 BF Twin Reverb(AB763) scratch build
  171. Still humming some.
  172. Hi all, new here.
  173. 5f1 Help Needed - DOA
  174. Power cord hot/neutral/ground question.
  175. Randall RG80 pre-amp
  176. Everything is great until I pull out my guitar cable
  177. Rectifier Tube Question...
  178. Peavey Bravo clone - Plz check my schematic!
  179. New Champ Build Problems...
  180. 5F1 with 5AR4 rectifier - excessive hum
  181. hum, i didn't do my home work...
  182. Distortion from 1 half of long tail phase inverter
  183. Fender DR Vibrato - intermittent fuzzy noise + other noises
  184. Strange Problem
  185. Stand alone reverb project - dry signal attenuation issue
  186. First Build Blues: Mojo JTM45
  187. Excessive hum
  188. First Build: Ruby debug help
  189. Deluxe Reverb Build - Bias way too hot, and other problems
  190. Can only hear it when volume maxed out (Ampeg SB-12 build)
  191. Deluxe Reverb clone - ugly distortion when v3 is connected - help!
  192. Trying to solve reason for low output (5F4 Super circuit)
  193. Fender 6G6-B Voltage way too high
  194. Very high screen current?!
  195. Low power from Champ style build
  196. JCM 800 build output transformer hum
  197. squealing out of control when powered on
  198. new build 5X3 Fender 2nd input problem
  199. 6g2 tremolo issue
  200. More 5F1 Champ Build problems...this one is strange
  201. Plexi/800 build hums if >60% max dissipation
  202. First build problem
  203. Clone Sorta Fender Pro Reverb problems?
  204. Princeton Reverb: Hum, Low B+, dead PT ...
  205. Hiss in new build
  206. Can't lower 5e3 B+ with Zeners
  207. Negative voltage on grid of cathode biased output tube...
  208. Super reverb making a breaking up noise/static sound
  209. 5f1 DIY...No Guitar Sounds....
  210. 5e3 motorboating?
  211. Mojotone JTM45 build issues-RR
  212. 5E3P Build problem
  213. Home Brew SVT Hum Issues - Suggestions
  214. New Marshall JTM-45 clone build making noise on high gain.
  215. Any ideas why this mid pot is not working?
  216. New Marshall JTM-45 clone build makes harsh loud noise.
  217. DIY Bassman 5F6-A treble knob acting very strange...
  218. B+ Issues in Tweed Twin Build
  219. ac30 build low volume
  220. Minor issues with a new build
  221. Home Brew SVT Bias Issues
  222. Bias 10mv difference in power tubes
  223. consistent issue across builds...
  224. help with build
  225. 5E3 new build. Pin 5 dcv not right?
  226. Max volume too low on tweed twin
  227. two problems with tweed style build
  228. bad cat mini?
  229. Hiss... again, but no boos
  230. rebuilding an amp without a layout?
  231. hum and squeal - hand wired Blackheart Little giant
  232. Princeton Reverb doesn't overdrive
  233. Super Lead 1959 clone - curious bright cap behavior
  234. Super Lead 1959 Clone Hum
  235. Princeton Reveb New Build.
  236. Problems with cabinet grounding
  237. issues with ac-30 build
  238. 5e3 Troubleshooting
  239. 5g9 bias cap exploded!! Now what...?
  240. Preamp heaters meter 3V, but no glow and no sound. What's up??
  241. Need some help on a 5F1, please.
  242. Amp Hum, most common cause(s) ???
  243. Checking voltages
  244. Blew up my Ruby - need help fixing
  245. Hum and buzz
  246. 5f6a still making trouble
  247. PSU or lead dress issue
  248. old Gibson Atlas top hummm
  249. New 5F8A HUMS!
  250. Mojo Princeton Reverb