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View Full Version : Amp Technical Info

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  1. How hard is it to rebuild an effects loop for an amp?
  2. Twin Reverb - Odd Sound
  3. Do all 50 watt Class A/B amps have the same amount of clean headroom?
  4. Convert my Lightning from EL84's to 6973's?!
  5. Swooshing Standby Switch Help
  6. Testing Speaker Cab Impedence
  7. Strange 5E3 amp static?
  8. removing the polarity switch
  9. Please give me the crash course on a Variac
  10. Serial FX loop switchable signal attenuator
  11. V5 V18 V33 V50 Crate Mods
  12. Mods to bump a SF Champ up to 10W?
  13. H&K Tubeman question
  14. '52 Gibson GA-40 Bias Setting Help - Hi Res Pics
  15. JTM45 experts, I need your help!
  16. Broken Tube Key and related issues
  17. Impedance selector switch rating
  18. OT into Short
  19. Adding a bias pot to an Ampeg B-25B
  20. Best Transformers for Brown Deluxe 6g3
  21. Debugging Danelectro reverb
  22. Any insight into SkipZ power Scaling?
  23. Pulling two tubes from a Twin Reverb?
  24. Using two output transformers together
  25. Dave Hunter Guitar Amp Handbook
  26. Request: Schematic for Marshall Haze combo anyone?
  27. Filter caps question for 73 Super Reverb
  28. Mods??? Mixing Different Power Tubes Together
  29. Rack mount dual rectifier has no volume.
  30. Danelectro DS-50 improvements...
  31. Got "bit" by an amp for the first time tonight....
  32. volume pot for Fender pro junior
  33. Speaker wire size for Marshall 1960ax 4x12 cab? Confused????
  34. Where Can I get Old Fender (1960's) Tube Charts? or Images of Tube Charts?
  35. Advice needed...adding LED in channel switch
  36. Traynor YCV40 Crackle - help?
  37. Possible pawn shop find, advise needed.
  38. Crazy Built-In Browner Question
  39. I just fried my Bedrock- argh
  40. *&^%$#@! used tubes just fried an amp
  41. new tubes for SF Princeton 'verb
  42. matching power tubes
  43. 12au7 in phase inverter/Fender Supersonic head
  44. Resistors Question???
  45. Amp oscillation help - Found bad ground
  46. amps that allow tube mixing
  47. bias circuit question
  48. Which Tweed Champ impedance?
  49. Need help from Husky (Suhr)
  50. Bulb for Heathkit Model TC-1 Tube Checker?
  51. do you know this circuit?
  52. Silvertone 1331 - transformer replacement?
  53. Princeton drive
  54. Princeton Reissue Question-tubes
  55. '64 Super Reverb blowing fuses
  56. Marshall 1987x input?
  57. Adding an extension cab to a Fender HR Deluxe
  58. Mig-50 Repairs
  59. Tweed Deluxe Owners - Help On Combo Cab Size. Please
  60. Instrument cable vs speaker cable...
  61. how hard of a job is switching out transformers?
  62. Removing paint from cabinet
  63. Sovtek Mig 50 PT
  64. Rusty Transformer
  65. Need for matched quads if amp has 2 bias dials for each pair?
  66. Removing valves in a TR to lower output power.
  67. Does a mod to a Korg era AC30 make a difference?
  68. why silver-mica for Fender tone stack treble cap?
  69. Swart SST-30 failure!! HELP!!
  70. Marshall JMP 2203/04 6550 to EL34 Conversion
  71. Help me hook up my attenuator to my AC30!
  72. Stuff you slap on tubes pins????
  73. Phase inverter Q for anyone willing to educate me
  74. Melody 2 x 6 rev/trem schematic
  75. Hakko 936 Handle Size
  76. 5F1 Bias Resistor Voltage Question
  77. tube rectifier in a bassman
  78. Kitty Hawk schematic??
  79. Are Speaker Ohms Relational To Sensitivity?
  80. Contact info. for Jeff Bober @ Precision Audio Tailoring?
  81. When did Mallory 150's change color?
  82. Where to find film caps under 1000pf???
  83. want to mod my 5f1
  84. Fender Vibrolux reverb
  85. 6v6 vrs. 6l6, sound differances ?
  86. What changes do I need to do to switch from 6v6s to 6l6s in a 5e3 Deluxe Clone
  87. Tweed Deluxe: max clean output 9watts?
  88. gulbransen organ amps
  89. DC in NFB
  90. crystal lattice-tubes?!?!?! Is this real?
  91. Need Help with blowing fuses
  92. JJ 12AX7: Reliability Problems?
  93. Deluxe Reverb Hoffman Conversions - Thoughts?
  94. 6CA7 to EL34
  95. Supro 1290T Question
  96. Amp techs in Atlanta?
  97. It's a tube/valve that's bugging me but which one and how?
  98. Why All The Noise??
  99. took in a stray today
  100. should i get groovetubes? NEED HELP QUICKLY!
  101. Is there a "quietest" 12ax7?
  102. Sizzle/Frying sound
  103. Pro Reverb circuit
  104. 69' Vibrolux - Bias BF/SF Q's
  105. How to fix lifeless reverb
  106. Popping from PRRI
  107. Sonic M1A
  108. retube??
  109. Tube Worth?
  110. How Would One Track Down Where Ghosting Is Coming From?
  111. Cool tool alert!!
  112. Amp feedback, need help please!
  113. 6L6s in a Deluxe Reverb... what issues?
  114. Which 6L6?
  115. NOS 5Y3 in a Swart STR
  116. Good tech in Ft. Lauderdale?
  117. Hartke 5500 Bass Head Blows Fuse
  118. Reverb wires and jacks vs. sockets ?
  119. Matched tubes?
  120. Filament wiring on Twin Reverbs
  121. Loud crackling sound then fuse blows...3rd time. Halp!
  122. '52 Bassman versus '46 Professional
  123. bassman vs bassman 50
  124. Custom Vibrolux Reverbs, static
  125. New Production Mullards
  126. Amp problem - intermittent crackle noise
  127. Fender Tonemaster: upgrading caps - ?
  128. Speaker Ohm question
  129. "Lay down" PT mounting ?
  130. JCM 900 sounds weird...
  131. Channel switching pop source?
  132. hi res schematic and layouts
  133. EL34s in a 5150?
  134. basic info on all power tube bias voltages
  135. Odd/conflicting values on DR AB763 circuit?
  136. Impedence mismatch: the lesser of two evils?
  137. Orange Tiny Terror Mercury Magnetics Upgrade
  138. Got a tube testing question.
  139. Will NOS tubes make any significant difference in a stock Marshall DSL 50?
  140. Need help converting SF Deluxe to Pro Reverb specs
  141. Twin Reverb- Reverb not working. Any tips?
  142. reducing power of Blackface Twin by removing tubes????
  143. Speaker replacement: Female Spade Connectors?
  144. 2x12 cab ohm question
  145. 4n7 conversion?
  146. Ampeg VT40 question or two
  147. Help with AB763 Deluxe Reverb Schematic Mods
  148. Which KT66?
  149. power amp/cab hookup...help!
  150. 2x6V6 (~20w) Plexi Schematic?
  151. Mullard tube fellas look inside
  152. Twin Reverb Reissue Vibrato problem
  153. question on using diff trannys with same tube
  154. Grid stoppers, clamping, blocking and crossover distortion.
  155. bias rite arrived gonna give it a crack... any advice before i jump in..?
  156. Egnater Rebel 20 Head - Loop Question
  157. What does 5e3 mean?
  158. Please help Identify 2 older 12AX7's
  159. Amp powering down on me- help!
  160. in the place of a choke
  161. Please Help! Water in Speaker
  162. Traynor ycv40 acting up, need help!!
  163. Traynor ycv40 acting up, need help!!
  164. Minimum baffle thickness for a EVM12L?
  165. pulling tubes from a blues deluxe
  166. Need info on pulling tube from 57 twin RI
  167. Parallel wiring....help/info
  168. First Time Amp Building ideas?
  169. Output transformer tolerances?
  170. amp just lost sound - troubleshooting
  171. No grounded outlets in practice space- Electrician advice requested
  172. Oh crap: Hot Rod Deluxe static (not tubes)
  173. Is a hot power transformer a bad sign?
  174. Difference between Front & Rear-Loaded speakers?
  175. Reliable Amp techs in the Des Moines, Iowa area?
  176. Tube layout for a Divided by 13 SJT 10/20???
  177. Marshall 5002 Lead 20 Gut Pic !! - Mod Advice -
  178. My amp quit last night, any ideas??
  179. 1956 Bassman - Question
  180. 7819 Power Tubes
  181. Fender Mods Gone Bad
  182. Marshall TSL602 Tone problem
  183. got a used Richter- Got a HUM
  184. Help: White noise from my fuchs!!!
  185. Rivera M100 footswitch question. FS-5?
  186. Source for 500K linear D-shaft pot?
  187. Modding a Bassman 10
  188. Deluxe Reverb tube socket question
  189. 18watt.com question
  190. Ampeg V4 running very hot
  191. Power tubes surging
  192. Super Champ reverb mod?
  193. Champ 600 trouble...
  194. Tremolux head - advise please...
  195. 12ax7 to swap with 12at7
  196. Ran 18w without rectifier for a few minutes...
  197. How do you cut the bright cap on a 72' Deluxe Reverb ?
  198. EL -34 Blue glow
  199. Baldwin 12ax7a blackplate:Sylvania's?
  200. Eminence Blue Frame mechanical buzz from magnet cover
  201. How to drain filter caps in a 72 Fender DR ?
  202. Stay or go: 1-ohm cathode resistors
  203. Tolerance of 450v filter cap
  204. Can anyone identify this 72 Deluxe Reverb mod?
  205. any marshall repair guys in tulsa ok
  206. Anybody familiar with old Tesla (not JJ) E34L's?
  207. Weber headphone Tap - headphone socket impedance?
  208. Tube Layout on Vox AC15H1TV
  209. Specific 6L6GC needed for Mesa amps (DC-5)?
  210. Deleuxe Reverb Transformers - MM, Heyboer etc
  211. ANyone familiar with the Belton Digi-Log reverb modules?
  212. Linked inputs... so nice. Is there a risk?
  213. So I have been buying NOS tubes....
  214. is there a way to test Tubes without a tube tester?
  215. intermittent hum... what could cause this?
  216. Don't tell me I just shot my PT...
  217. Input jack replacement....
  218. amazing tube making video
  219. could use some help (spitfire build)
  220. EF86- 2 Channel or Channel Switching?
  221. Identify These 12ax7s
  222. Traynor ycv40 still screwing with me.
  223. Microphonic Bandmaster
  224. Supro Thunderbolt Ghost Notes, possible bad cap job
  225. shielding on fender amps?
  226. Need Help Trouble Shooting Cab Wiring
  227. Bad 6v6 power tube in Super Champ XD. Suggestions/Comments?
  228. biasing a guytron gt 100 rev b
  229. Ampeg Gemini I (gut shots)
  230. Can a SF Princeton be modded to a 6G2?
  231. Biasing Rivera Amps
  232. Remember to check the power chord..
  233. Need advice on replacing tubes in 68 Bassman
  234. Need Help
  235. fender blues jr into 18 watt lite IIb help needed
  236. Pre amp tube broken leg
  237. can capacitor preferences?
  238. Lectrolab R700c bass amp schematic?
  239. Stupid speaker question....
  240. Is a g12H30 considered a greenback type speaker?
  241. Amp eats output valves for breakfast
  242. Plexi clone B+ question
  243. fixing the balance pot
  244. Did I Almost Electrocute Myself?
  245. How do different ohms effect an amp??
  246. 6L6GA in a Hot Rod Deluxe ?!
  247. Help me gain more knowledge..
  248. Red Plating E34L Tube- Any Ideas??
  249. Q regarding different primary loads on Fender OT's
  250. A definition of "AC" in amp/guitar signal