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  1. Change led color and some mod to footswitch
  2. Hammond / Everett AO-50 conversion to Vox AC15
  3. Mesa Boogie F-50.. what is this?
  4. Question about using relays for foot s/w
  5. Bugera V22 Infinium CHOKE mod
  6. Opinions on a relay activated volume boost
  7. Bright Switch/Cap Wiring
  8. would a Master Volume solve my issue?
  9. MOSFET PI, how to Bias?
  10. Fender M80 Overdrive Channel
  11. Ampeg Ba 210 SP High EQ mod?
  12. Can't Turn Volume Completely Off
  13. Solder Both Sides of PCB?
  14. Adding gain stage to Marshall 2203; handling the 10k cold clipped stage
  15. Adding an on/off reverb switch to vintage amp
  16. Fender Twin Reverb
  17. DSL 100: Changing Grid Blockers and Bias Resistors
  18. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  19. Effects loop on a AC15CHWX
  20. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  21. Ampeg B-15 Preamp...
  22. Modding Boost Switch on Bugera V22
  23. 65 Blackface Fender Showman PPIMV
  24. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  25. Final tweaking of a 1959SLP Re-issue..
  26. JTM60/JCM600 important MODS
  27. Adding a choke to Sovtek Mig 60
  28. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  29. Peavey Triumph 60 Hum
  30. Fender Frontman Mod.
  31. Removing power valves to reduce output
  32. Fender Reverb Mods
  33. Vox DA5 lineout modification - speaker bypass
  34. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  35. Possible to add NFB to this schematic?
  36. lower wattage in 5E7A tweed pro?
  37. Peavey Classic 50 Blue Guitar Mods
  38. I think it's attenuater time
  39. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  40. Bassman AA568 unused triode applications
  41. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  42. Log/ Lin Bass Pot (DlxRev).
  43. EL34 in a Champ?
  44. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  45. 6150+ Mods and a real engineer guitarist!
  46. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  47. Thank you Valvewizard - Ground, hum blocking
  48. Replacement speakers poll
  49. Bias points
  50. 5150 bias mod
  51. Fender Pro Jr More Bass
  52. Trying New Speakers/replacements
  53. Marshall Amp increase Bass/low-mid response
  54. Can y'all help me with a minor mod to a Peavey Rage 158?
  55. Relay wiring for Vox Night Train mod
  56. Adding additional input output to Line6 spider ii amp
  57. Suggestion for moderator - let's spell "Tweeks" correctly!
  58. Looking for more gain mod schematic jcm800 2210
  59. Negative feedback loop mod for Pro Reverb
  60. Using Combo amp Speaker as Cab
  61. Marshall JVM
  62. Are SoZo blue caps the same as Fender blue caps?
  63. Line out help please
  64. I want to reduce the gain in my Peavey Rage 158.
  65. help with some peavey XXX mods
  66. Simplest way to turn a combo amp into both a head and a cab as well?
  67. Amp Mod for some More Gain?
  68. Bogen PA head for guitar? Help with pentode preamp stages.
  69. Another JTM60 1x12 thread/question... (haven't seen this one)
  70. Fender Blues Jnr Mk3 Mod
  71. What's this JCM800 mod do?
  72. What's this JCM800 mod do?
  73. Supro Inspired VVR Question
  74. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  75. Adding tube spring reverb to a Mesa Boogie SOB
  76. 5V4 instead of 5Y3 ?
  77. Bypass Digital Board in Super Champ XD (& possibly others)
  78. Epiphone valve standard to increase the treble
  79. Different Speaker Outputs On Marshall DSL 40C
  80. Help needed to upgrade Capacitors in a Marshall DSL 40C
  81. coupling cap to block some bass?
  82. Hicks mender
  83. 2015 VOX Ac30c2 service manual
  84. Drop preamp voltage
  85. Fun new zener tweak!
  86. Convert 5F6A Bassman into 5F8A Twin
  87. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  88. Newest Peavey Classic 30 - Blue Guitar Mods?
  89. Cathode bypass gain boost questions
  90. converting 6sc7 amp to use 6sl7
  91. 6CA7 tubes something different in the place of EL34 ??
  92. Remove ground lift network? JCM900 dual reverb
  93. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  94. JCM900 4500 Mod: C27 Jumper or...
  95. cathodyne/LTP switch (for small P-P amp)
  96. Replacing my tone control with an Orange-style shape control
  97. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  98. Fender Twin bias dilema
  99. Fender Ultralinear - KT66, 77 or KT88?
  100. Improved circuit for power tube tremolo in a fixed-bias amp
  101. Bias test points for PCB amp
  102. Fender Frontman 65R volume mod
  103. Peavey Classic VTX 65 watt combo question for Enzo
  104. Eyelet boarding a reissue amp (Fender)
  105. Which switch for high voltage switching?
  106. Carvin Belair - moding one channel
  107. Sound differences from different dual op amps in SS amps
  108. De-biasing a Peavey Classic VT (6L6 output stage)
  109. Tonestack help
  110. add an attenuator to an existing tweeter?
  111. mesa mk IV bias
  112. Conversion to acoustic amp
  113. Taming Fender Blues Deluxe Abrupt Volume Control
  114. Switchable VTM 60/120
  115. SF Twin reverb Ultra linear transformer Blackfacing
  116. Age Old Problem of TOOO Bright Super Reverb
  117. Deeper voicing on EVH5150iii
  118. Different types of power resistors
  119. What cap value for this idea?
  120. Mesa Nomad 55 Reduce the gain
  121. Vox Escort Mains/Battery amp power upgrade?
  122. Possible wrong installation of diodes in place of a 6X4
  123. Taming a Gibson tone stack
  124. "Tighter" Bass on a Tone King.
  125. Peavey xxx upgrades
  126. Cable runs and effect on tone
  127. Help with mod to Crate FW65 Combo
  128. Mesa .50cal EL84 version bias pot mod
  129. Switch ratings for mods with high voltage
  130. Musicman 75 head 2100EX too much overdrive
  131. Marshall DSL mod
  132. Any ideas for a temperature controlled fan for Bass amp
  133. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  134. Slitting speaker cone or knitting needle ? Kinks content
  135. Vox lead escort 50 - integrating valve stage
  136. LTPI on a 6G2?
  137. Adding a footswitch to a Blackstar HT-1
  138. Fender Deluxe 112 Plus Too LOUD
  139. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  140. Built-in solid state reverb circuit for tube amp homebrew...
  141. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  142. Silverfacing a Deluxe Reverb
  143. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  144. ROLAND BOLT 30- 60 cycle hum...
  145. Fender Bassman AA864 variant - mods
  146. Peavey 6505+ 112 mod for channel balance
  147. Peavey Valveking Modifications
  148. tightening up BF Princeton reverb ?
  149. Best way to increase bass response...
  150. E-Wave DG2-30RH head Clean channel too bright
  151. ENGL E320 clean vol mod
  152. Trem and Bias
  153. marshall 1987x hiss reduction possible?
  154. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  155. I wish to modify the tone stack in my Ashdown Mag 300 head.
  156. Using 12AT7 instead of 12AX7
  157. Subbing 12AU7 for 12AX7
  158. Any thoughts on how to "soften" attack on a Fender Bassman ?
  159. Fender Blues Junior excessive treble
  160. Looking for less low-cut in Randall RVC (like RD5C)
  161. Marshall JCM 900 mod
  162. Modding reverb
  163. Marshall Split channel again (some interesting information)
  164. Changing rectifier in a Ceriatone 5f6A Bassman
  165. guitar amp ->PA =cabulator
  166. Optocoupler in Fender tremolo
  167. Bugera 1960 infinium Schematic
  168. Epiphone Valve Junior OT upgrade -- help please???
  169. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  170. modifying the Fender Greta line out
  171. Wanna help with basic mods...
  172. B+ voltage drop via Zener/MOSFET question
  173. Minimum output impedance for Marshall Lead 12.
  174. Hammond drawbars - guitar
  175. Peavey Bravo modifications
  176. Hot Rod Deville upgrade
  177. Twin reverb new speakers
  178. 65 Princeton reverb reissue Power transformer pn# 75165 Where can I get one ??
  179. Converting a PCB Champion 600 to a handwired 5F1
  180. Magnatone M13 - Easy Gain Boost
  181. Marshall DSL 100 - Mod to Switchable (50/100 watts)
  182. Fender Hot Rod Deluxe volume pot replacement
  183. Peavey Classic 50 Blue Mods
  184. 12AU7 failed in Orange AD30
  185. Crate gxt-100 is now a BENGL two more related mods needed
  186. Line-In to Active EQ of Fender Super Twin?
  187. Peavey Bandit 65 mods, anyone have any good mods?
  188. Best SGRs?
  189. Fender Greta Tone Control Mod for Music Playing Purposes
  190. Switchable Cathode Bypass Cap help
  191. Adding another tube to a Crate GXT100
  192. 6V6 bias question
  193. Marshall JCM800 4210 Channel Switcher - modification - advice sought.
  194. My amp needs to be louder, said the novice
  195. Marshall Valvestate - Adding Cooling Fan?
  196. Help with Mesa mark V CH2 mod
  197. JCA22H too bright
  198. Crate Gxt-100 looking for any mods
  199. The beauty of a decade box: ab763 tweaks
  200. non-presence 12ax7 phase inverter
  201. bugera 333xl-212 tone stack mod + more
  202. Silverface to Blackface
  203. Rivera S120 Mods - Please Help!
  204. Orange tiny Terror fx loop mod ?
  205. Help on DIY F2B with mods
  206. Changing Plate resistor question.
  207. Compilation of BF Reverb Fender Mods
  208. Guild Thunderbass 50Watt power supply issues
  209. Dual independent bias for a Windsor
  210. Amp Maker SE5 extra gain stage
  211. large PI tail resistor
  212. Bucking Transformer Built In to Chassis
  213. Univox U45b Tremolo
  214. Jcm 2210 mod help
  215. VHT Special 6 Ultra Mods
  216. Mod/Tweak VHT Special 6 Combo
  217. CRATE VC-3112 4xEL84 to 2xEL84 mod?
  218. "Fender" remote reverb control Badabing ka-pow!
  219. A couple questions about Peavey Butcher mods (should also apply to VTM)
  220. 5F1 Champ Mods - component ratings?
  221. 68 Princeton Reverb Bias Mod Question
  222. Moving clean ch. Tonestack on a 2210. Good idea?
  223. Can I add a Piezo tweeter to Peavey KB100?
  224. L-pad question
  225. Blackstar HT-1 - Add reverb?
  226. Useful Matchless Cluman mods?
  227. Line 100v amp conversion ?
  228. Add choke to blues junior (mexico)
  229. Music Man RD50 112 6l6 to 6v6
  230. LOW Gain !
  231. Looking for Bright options...
  232. DSL 401 mods
  233. prosonic combo weak reverb
  234. Marshall AVT50 cd input too loud
  235. Princeton 112 Plus - Shutdown MOD
  236. Fender Bassman output waveform oscillations
  237. PPIMV in SF Twin 135
  238. Uberschall channel balance
  239. Modifying Princeton 112 plus - Make Dirty Channel Versatile Clean Channel
  240. Fender princeton 112 solid state too loud!!
  241. Converting AA371 Basssman to best sounding circuit for guitar- which one ?
  242. Bugera v22 mod questions from a beginner
  243. Mustang III
  244. Connect a combo amp to a 4x12 cab.. Can it be done?
  245. need to add an Fx loop to valve amp ?
  246. Mesa boogie Nomad 100 new speaker reqd
  247. Marshall 1987X. customer says too loud
  248. Help me please
  249. Anyone know where to get the Fender silverface push/pull master volume pots?
  250. What Have I Done??? Orange Rocker 30 OT Swap