View Full Version : Mods & Tweaks

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  1. Bright Switch/Cap Wiring
  2. would a Master Volume solve my issue?
  3. MOSFET PI, how to Bias?
  4. Fender M80 Overdrive Channel
  5. Ampeg Ba 210 SP High EQ mod?
  6. Can't Turn Volume Completely Off
  7. Solder Both Sides of PCB?
  8. Adding gain stage to Marshall 2203; handling the 10k cold clipped stage
  9. Adding an on/off reverb switch to vintage amp
  10. Fender Twin Reverb
  11. DSL 100: Changing Grid Blockers and Bias Resistors
  12. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  13. Effects loop on a AC15CHWX
  14. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  15. Ampeg B-15 Preamp...
  16. Modding Boost Switch on Bugera V22
  17. 65 Blackface Fender Showman PPIMV
  18. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  19. Final tweaking of a 1959SLP Re-issue..
  20. JTM60/JCM600 important MODS
  21. Adding a choke to Sovtek Mig 60
  22. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  23. Peavey Triumph 60 Hum
  24. Fender Frontman Mod.
  25. Removing power valves to reduce output
  26. Fender Reverb Mods
  27. Vox DA5 lineout modification - speaker bypass
  28. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  29. Possible to add NFB to this schematic?
  30. lower wattage in 5E7A tweed pro?
  31. Peavey Classic 50 Blue Guitar Mods
  32. I think it's attenuater time
  33. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  34. Bassman AA568 unused triode applications
  35. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  36. Log/ Lin Bass Pot (DlxRev).
  37. EL34 in a Champ?
  38. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  39. 6150+ Mods and a real engineer guitarist!
  40. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  41. Thank you Valvewizard - Ground, hum blocking
  42. Replacement speakers poll
  43. Bias points
  44. 5150 bias mod
  45. Fender Pro Jr More Bass
  46. Trying New Speakers/replacements
  47. Marshall Amp increase Bass/low-mid response
  48. Can y'all help me with a minor mod to a Peavey Rage 158?
  49. Relay wiring for Vox Night Train mod
  50. Adding additional input output to Line6 spider ii amp
  51. Suggestion for moderator - let's spell "Tweeks" correctly!
  52. Looking for more gain mod schematic jcm800 2210
  53. Negative feedback loop mod for Pro Reverb
  54. Using Combo amp Speaker as Cab
  55. Marshall JVM
  56. Are SoZo blue caps the same as Fender blue caps?
  57. Line out help please
  58. I want to reduce the gain in my Peavey Rage 158.
  59. help with some peavey XXX mods
  60. Simplest way to turn a combo amp into both a head and a cab as well?
  61. Amp Mod for some More Gain?
  62. Bogen PA head for guitar? Help with pentode preamp stages.
  63. Another JTM60 1x12 thread/question... (haven't seen this one)
  64. Fender Blues Jnr Mk3 Mod
  65. What's this JCM800 mod do?
  66. What's this JCM800 mod do?
  67. Supro Inspired VVR Question
  68. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  69. Adding tube spring reverb to a Mesa Boogie SOB
  70. 5V4 instead of 5Y3 ?
  71. Bypass Digital Board in Super Champ XD (& possibly others)
  72. Epiphone valve standard to increase the treble
  73. Different Speaker Outputs On Marshall DSL 40C
  74. Help needed to upgrade Capacitors in a Marshall DSL 40C
  75. coupling cap to block some bass?
  76. Hicks mender
  77. 2015 VOX Ac30c2 service manual
  78. Drop preamp voltage
  79. Fun new zener tweak!
  80. Convert 5F6A Bassman into 5F8A Twin
  81. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  82. Newest Peavey Classic 30 - Blue Guitar Mods?
  83. Cathode bypass gain boost questions
  84. converting 6sc7 amp to use 6sl7
  85. 6CA7 tubes something different in the place of EL34 ??
  86. Remove ground lift network? JCM900 dual reverb
  87. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  88. JCM900 4500 Mod: C27 Jumper or...
  89. cathodyne/LTP switch (for small P-P amp)
  90. Replacing my tone control with an Orange-style shape control
  91. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  92. Fender Twin bias dilema
  93. Fender Ultralinear - KT66, 77 or KT88?
  94. Improved circuit for power tube tremolo in a fixed-bias amp
  95. Bias test points for PCB amp
  96. Fender Frontman 65R volume mod
  97. Peavey Classic VTX 65 watt combo question for Enzo
  98. Eyelet boarding a reissue amp (Fender)
  99. Which switch for high voltage switching?
  100. Carvin Belair - moding one channel
  101. Sound differences from different dual op amps in SS amps
  102. De-biasing a Peavey Classic VT (6L6 output stage)
  103. Tonestack help
  104. add an attenuator to an existing tweeter?
  105. mesa mk IV bias
  106. Conversion to acoustic amp
  107. Taming Fender Blues Deluxe Abrupt Volume Control
  108. Switchable VTM 60/120
  109. SF Twin reverb Ultra linear transformer Blackfacing
  110. Age Old Problem of TOOO Bright Super Reverb
  111. Deeper voicing on EVH5150iii
  112. Different types of power resistors
  113. What cap value for this idea?
  114. Mesa Nomad 55 Reduce the gain
  115. Vox Escort Mains/Battery amp power upgrade?
  116. Possible wrong installation of diodes in place of a 6X4
  117. Taming a Gibson tone stack
  118. "Tighter" Bass on a Tone King.
  119. Peavey xxx upgrades
  120. Cable runs and effect on tone
  121. Help with mod to Crate FW65 Combo
  122. Mesa .50cal EL84 version bias pot mod
  123. Switch ratings for mods with high voltage
  124. Musicman 75 head 2100EX too much overdrive
  125. Marshall DSL mod
  126. Any ideas for a temperature controlled fan for Bass amp
  127. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  128. Slitting speaker cone or knitting needle ? Kinks content
  129. Vox lead escort 50 - integrating valve stage
  130. LTPI on a 6G2?
  131. Adding a footswitch to a Blackstar HT-1
  132. Fender Deluxe 112 Plus Too LOUD
  133. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  134. Built-in solid state reverb circuit for tube amp homebrew...
  135. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  136. Silverfacing a Deluxe Reverb
  137. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  138. ROLAND BOLT 30- 60 cycle hum...
  139. Fender Bassman AA864 variant - mods
  140. Peavey 6505+ 112 mod for channel balance
  141. Peavey Valveking Modifications
  142. tightening up BF Princeton reverb ?
  143. Best way to increase bass response...
  144. E-Wave DG2-30RH head Clean channel too bright
  145. ENGL E320 clean vol mod
  146. Trem and Bias
  147. marshall 1987x hiss reduction possible?
  148. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  149. I wish to modify the tone stack in my Ashdown Mag 300 head.
  150. Using 12AT7 instead of 12AX7
  151. Subbing 12AU7 for 12AX7
  152. Any thoughts on how to "soften" attack on a Fender Bassman ?
  153. Fender Blues Junior excessive treble
  154. Looking for less low-cut in Randall RVC (like RD5C)
  155. Marshall JCM 900 mod
  156. Modding reverb
  157. Marshall Split channel again (some interesting information)
  158. Changing rectifier in a Ceriatone 5f6A Bassman
  159. guitar amp ->PA =cabulator
  160. Optocoupler in Fender tremolo
  161. Bugera 1960 infinium Schematic
  162. Epiphone Valve Junior OT upgrade -- help please???
  163. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  164. modifying the Fender Greta line out
  165. Wanna help with basic mods...
  166. B+ voltage drop via Zener/MOSFET question
  167. Minimum output impedance for Marshall Lead 12.
  168. Hammond drawbars - guitar
  169. Peavey Bravo modifications
  170. Hot Rod Deville upgrade
  171. Twin reverb new speakers
  172. 65 Princeton reverb reissue Power transformer pn# 75165 Where can I get one ??
  173. Converting a PCB Champion 600 to a handwired 5F1
  174. Magnatone M13 - Easy Gain Boost
  175. Marshall DSL 100 - Mod to Switchable (50/100 watts)
  176. Fender Hot Rod Deluxe volume pot replacement
  177. Peavey Classic 50 Blue Mods
  178. 12AU7 failed in Orange AD30
  179. Crate gxt-100 is now a BENGL two more related mods needed
  180. Line-In to Active EQ of Fender Super Twin?
  181. Peavey Bandit 65 mods, anyone have any good mods?
  182. Best SGRs?
  183. Fender Greta Tone Control Mod for Music Playing Purposes
  184. Switchable Cathode Bypass Cap help
  185. Adding another tube to a Crate GXT100
  186. 6V6 bias question
  187. Marshall JCM800 4210 Channel Switcher - modification - advice sought.
  188. My amp needs to be louder, said the novice
  189. Marshall Valvestate - Adding Cooling Fan?
  190. Help with Mesa mark V CH2 mod
  191. JCA22H too bright
  192. Crate Gxt-100 looking for any mods
  193. The beauty of a decade box: ab763 tweaks
  194. non-presence 12ax7 phase inverter
  195. bugera 333xl-212 tone stack mod + more
  196. Silverface to Blackface
  197. Rivera S120 Mods - Please Help!
  198. Orange tiny Terror fx loop mod ?
  199. Help on DIY F2B with mods
  200. Changing Plate resistor question.
  201. Compilation of BF Reverb Fender Mods
  202. Guild Thunderbass 50Watt power supply issues
  203. Dual independent bias for a Windsor
  204. Amp Maker SE5 extra gain stage
  205. large PI tail resistor
  206. Bucking Transformer Built In to Chassis
  207. Univox U45b Tremolo
  208. Jcm 2210 mod help
  209. VHT Special 6 Ultra Mods
  210. Mod/Tweak VHT Special 6 Combo
  211. CRATE VC-3112 4xEL84 to 2xEL84 mod?
  212. "Fender" remote reverb control Badabing ka-pow!
  213. A couple questions about Peavey Butcher mods (should also apply to VTM)
  214. 5F1 Champ Mods - component ratings?
  215. 68 Princeton Reverb Bias Mod Question
  216. Moving clean ch. Tonestack on a 2210. Good idea?
  217. Can I add a Piezo tweeter to Peavey KB100?
  218. L-pad question
  219. Blackstar HT-1 - Add reverb?
  220. Useful Matchless Cluman mods?
  221. Line 100v amp conversion ?
  222. Add choke to blues junior (mexico)
  223. Music Man RD50 112 6l6 to 6v6
  224. LOW Gain !
  225. Looking for Bright options...
  226. DSL 401 mods
  227. prosonic combo weak reverb
  228. Marshall AVT50 cd input too loud
  229. Princeton 112 Plus - Shutdown MOD
  230. Fender Bassman output waveform oscillations
  231. PPIMV in SF Twin 135
  232. Uberschall channel balance
  233. Modifying Princeton 112 plus - Make Dirty Channel Versatile Clean Channel
  234. Fender princeton 112 solid state too loud!!
  235. Converting AA371 Basssman to best sounding circuit for guitar- which one ?
  236. Bugera v22 mod questions from a beginner
  237. Mustang III
  238. Connect a combo amp to a 4x12 cab.. Can it be done?
  239. need to add an Fx loop to valve amp ?
  240. Mesa boogie Nomad 100 new speaker reqd
  241. Marshall 1987X. customer says too loud
  242. Help me please
  243. Anyone know where to get the Fender silverface push/pull master volume pots?
  244. What Have I Done??? Orange Rocker 30 OT Swap
  245. Adding Midrange control to this tone circuit
  246. Effects loop wont work ?????
  247. I know, Valvestate 150 mod to make clean channel worth using?
  248. FX Loop problems
  249. Univox U200B
  250. El 84 fixed bias amp & Paul Ruby zener mod.