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  1. DSL 100: Changing Grid Blockers and Bias Resistors
  2. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  3. Effects loop on a AC15CHWX
  4. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  5. Ampeg B-15 Preamp...
  6. Modding Boost Switch on Bugera V22
  7. 65 Blackface Fender Showman PPIMV
  8. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  9. Final tweaking of a 1959SLP Re-issue..
  10. JTM60/JCM600 important MODS
  11. Adding a choke to Sovtek Mig 60
  12. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  13. Peavey Triumph 60 Hum
  14. Fender Frontman Mod.
  15. Removing power valves to reduce output
  16. Fender Reverb Mods
  17. Vox DA5 lineout modification - speaker bypass
  18. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  19. Possible to add NFB to this schematic?
  20. lower wattage in 5E7A tweed pro?
  21. Peavey Classic 50 Blue Guitar Mods
  22. I think it's attenuater time
  23. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  24. Bassman AA568 unused triode applications
  25. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  26. Log/ Lin Bass Pot (DlxRev).
  27. EL34 in a Champ?
  28. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  29. 6150+ Mods and a real engineer guitarist!
  30. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  31. Thank you Valvewizard - Ground, hum blocking
  32. Replacement speakers poll
  33. Bias points
  34. 5150 bias mod
  35. Fender Pro Jr More Bass
  36. Trying New Speakers/replacements
  37. Marshall Amp increase Bass/low-mid response
  38. Can y'all help me with a minor mod to a Peavey Rage 158?
  39. Relay wiring for Vox Night Train mod
  40. Adding additional input output to Line6 spider ii amp
  41. Suggestion for moderator - let's spell "Tweeks" correctly!
  42. Looking for more gain mod schematic jcm800 2210
  43. Negative feedback loop mod for Pro Reverb
  44. Using Combo amp Speaker as Cab
  45. Marshall JVM
  46. Are SoZo blue caps the same as Fender blue caps?
  47. Line out help please
  48. I want to reduce the gain in my Peavey Rage 158.
  49. help with some peavey XXX mods
  50. Simplest way to turn a combo amp into both a head and a cab as well?
  51. Amp Mod for some More Gain?
  52. Bogen PA head for guitar? Help with pentode preamp stages.
  53. Another JTM60 1x12 thread/question... (haven't seen this one)
  54. Fender Blues Jnr Mk3 Mod
  55. What's this JCM800 mod do?
  56. What's this JCM800 mod do?
  57. Supro Inspired VVR Question
  58. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  59. Adding tube spring reverb to a Mesa Boogie SOB
  60. 5V4 instead of 5Y3 ?
  61. Bypass Digital Board in Super Champ XD (& possibly others)
  62. Epiphone valve standard to increase the treble
  63. Different Speaker Outputs On Marshall DSL 40C
  64. Help needed to upgrade Capacitors in a Marshall DSL 40C
  65. coupling cap to block some bass?
  66. Hicks mender
  67. 2015 VOX Ac30c2 service manual
  68. Drop preamp voltage
  69. Fun new zener tweak!
  70. Convert 5F6A Bassman into 5F8A Twin
  71. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  72. Newest Peavey Classic 30 - Blue Guitar Mods?
  73. Cathode bypass gain boost questions
  74. converting 6sc7 amp to use 6sl7
  75. 6CA7 tubes something different in the place of EL34 ??
  76. Remove ground lift network? JCM900 dual reverb
  77. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  78. JCM900 4500 Mod: C27 Jumper or...
  79. cathodyne/LTP switch (for small P-P amp)
  80. Replacing my tone control with an Orange-style shape control
  81. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  82. Fender Twin bias dilema
  83. Fender Ultralinear - KT66, 77 or KT88?
  84. Improved circuit for power tube tremolo in a fixed-bias amp
  85. Bias test points for PCB amp
  86. Fender Frontman 65R volume mod
  87. Peavey Classic VTX 65 watt combo question for Enzo
  88. Eyelet boarding a reissue amp (Fender)
  89. Which switch for high voltage switching?
  90. Carvin Belair - moding one channel
  91. Sound differences from different dual op amps in SS amps
  92. De-biasing a Peavey Classic VT (6L6 output stage)
  93. Tonestack help
  94. add an attenuator to an existing tweeter?
  95. mesa mk IV bias
  96. Conversion to acoustic amp
  97. Taming Fender Blues Deluxe Abrupt Volume Control
  98. Switchable VTM 60/120
  99. SF Twin reverb Ultra linear transformer Blackfacing
  100. Age Old Problem of TOOO Bright Super Reverb
  101. Deeper voicing on EVH5150iii
  102. Different types of power resistors
  103. What cap value for this idea?
  104. Mesa Nomad 55 Reduce the gain
  105. Vox Escort Mains/Battery amp power upgrade?
  106. Possible wrong installation of diodes in place of a 6X4
  107. Taming a Gibson tone stack
  108. "Tighter" Bass on a Tone King.
  109. Peavey xxx upgrades
  110. Cable runs and effect on tone
  111. Help with mod to Crate FW65 Combo
  112. Mesa .50cal EL84 version bias pot mod
  113. Switch ratings for mods with high voltage
  114. Musicman 75 head 2100EX too much overdrive
  115. Marshall DSL mod
  116. Any ideas for a temperature controlled fan for Bass amp
  117. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  118. Slitting speaker cone or knitting needle ? Kinks content
  119. Vox lead escort 50 - integrating valve stage
  120. LTPI on a 6G2?
  121. Adding a footswitch to a Blackstar HT-1
  122. Fender Deluxe 112 Plus Too LOUD
  123. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  124. Built-in solid state reverb circuit for tube amp homebrew...
  125. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  126. Silverfacing a Deluxe Reverb
  127. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  128. ROLAND BOLT 30- 60 cycle hum...
  129. Fender Bassman AA864 variant - mods
  130. Peavey 6505+ 112 mod for channel balance
  131. Peavey Valveking Modifications
  132. tightening up BF Princeton reverb ?
  133. Best way to increase bass response...
  134. E-Wave DG2-30RH head Clean channel too bright
  135. ENGL E320 clean vol mod
  136. Trem and Bias
  137. marshall 1987x hiss reduction possible?
  138. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  139. I wish to modify the tone stack in my Ashdown Mag 300 head.
  140. Using 12AT7 instead of 12AX7
  141. Subbing 12AU7 for 12AX7
  142. Any thoughts on how to "soften" attack on a Fender Bassman ?
  143. Fender Blues Junior excessive treble
  144. Looking for less low-cut in Randall RVC (like RD5C)
  145. Marshall JCM 900 mod
  146. Modding reverb
  147. Marshall Split channel again (some interesting information)
  148. Changing rectifier in a Ceriatone 5f6A Bassman
  149. guitar amp ->PA =cabulator
  150. Optocoupler in Fender tremolo
  151. Bugera 1960 infinium Schematic
  152. Epiphone Valve Junior OT upgrade -- help please???
  153. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  154. modifying the Fender Greta line out
  155. Wanna help with basic mods...
  156. B+ voltage drop via Zener/MOSFET question
  157. Minimum output impedance for Marshall Lead 12.
  158. Hammond drawbars - guitar
  159. Peavey Bravo modifications
  160. Hot Rod Deville upgrade
  161. Twin reverb new speakers
  162. 65 Princeton reverb reissue Power transformer pn# 75165 Where can I get one ??
  163. Converting a PCB Champion 600 to a handwired 5F1
  164. Magnatone M13 - Easy Gain Boost
  165. Marshall DSL 100 - Mod to Switchable (50/100 watts)
  166. Fender Hot Rod Deluxe volume pot replacement
  167. Peavey Classic 50 Blue Mods
  168. 12AU7 failed in Orange AD30
  169. Crate gxt-100 is now a BENGL two more related mods needed
  170. Line-In to Active EQ of Fender Super Twin?
  171. Peavey Bandit 65 mods, anyone have any good mods?
  172. Best SGRs?
  173. Fender Greta Tone Control Mod for Music Playing Purposes
  174. Switchable Cathode Bypass Cap help
  175. Adding another tube to a Crate GXT100
  176. 6V6 bias question
  177. Marshall JCM800 4210 Channel Switcher - modification - advice sought.
  178. My amp needs to be louder, said the novice
  179. Marshall Valvestate - Adding Cooling Fan?
  180. Help with Mesa mark V CH2 mod
  181. JCA22H too bright
  182. Crate Gxt-100 looking for any mods
  183. The beauty of a decade box: ab763 tweaks
  184. non-presence 12ax7 phase inverter
  185. bugera 333xl-212 tone stack mod + more
  186. Silverface to Blackface
  187. Rivera S120 Mods - Please Help!
  188. Orange tiny Terror fx loop mod ?
  189. Help on DIY F2B with mods
  190. Changing Plate resistor question.
  191. Compilation of BF Reverb Fender Mods
  192. Guild Thunderbass 50Watt power supply issues
  193. Dual independent bias for a Windsor
  194. Amp Maker SE5 extra gain stage
  195. large PI tail resistor
  196. Bucking Transformer Built In to Chassis
  197. Univox U45b Tremolo
  198. Jcm 2210 mod help
  199. VHT Special 6 Ultra Mods
  200. Mod/Tweak VHT Special 6 Combo
  201. CRATE VC-3112 4xEL84 to 2xEL84 mod?
  202. "Fender" remote reverb control Badabing ka-pow!
  203. A couple questions about Peavey Butcher mods (should also apply to VTM)
  204. 5F1 Champ Mods - component ratings?
  205. 68 Princeton Reverb Bias Mod Question
  206. Moving clean ch. Tonestack on a 2210. Good idea?
  207. Can I add a Piezo tweeter to Peavey KB100?
  208. L-pad question
  209. Blackstar HT-1 - Add reverb?
  210. Useful Matchless Cluman mods?
  211. Line 100v amp conversion ?
  212. Add choke to blues junior (mexico)
  213. Music Man RD50 112 6l6 to 6v6
  214. LOW Gain !
  215. Looking for Bright options...
  216. DSL 401 mods
  217. prosonic combo weak reverb
  218. Marshall AVT50 cd input too loud
  219. Princeton 112 Plus - Shutdown MOD
  220. Fender Bassman output waveform oscillations
  221. PPIMV in SF Twin 135
  222. Uberschall channel balance
  223. Modifying Princeton 112 plus - Make Dirty Channel Versatile Clean Channel
  224. Fender princeton 112 solid state too loud!!
  225. Converting AA371 Basssman to best sounding circuit for guitar- which one ?
  226. Bugera v22 mod questions from a beginner
  227. Mustang III
  228. Connect a combo amp to a 4x12 cab.. Can it be done?
  229. need to add an Fx loop to valve amp ?
  230. Mesa boogie Nomad 100 new speaker reqd
  231. Marshall 1987X. customer says too loud
  232. Help me please
  233. Anyone know where to get the Fender silverface push/pull master volume pots?
  234. What Have I Done??? Orange Rocker 30 OT Swap
  235. Adding Midrange control to this tone circuit
  236. Effects loop wont work ?????
  237. I know, Valvestate 150 mod to make clean channel worth using?
  238. FX Loop problems
  239. Univox U200B
  240. El 84 fixed bias amp & Paul Ruby zener mod.
  241. Fender Blues jnr Too much treble
  242. Switching jack needed?
  243. Marshall JCM 800 2204 FX loop advice
  244. Question about gain staging
  245. tube saving power up tweaks?
  246. Mark Moyer mods to "Custom" Vibrolux Reverb
  247. Adding a choke to Ampeg V-4 power supply?
  248. Using Kalamazoo Model One as a preamp.
  249. Older Traynor YCV40 Master Mod.....again
  250. triode/pentode high/low power switch