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  1. Peavey Valveking Pre PI Master Volume mod Thoughts?
  2. THD picovalve
  3. Marshall dsl 15 h mod help
  4. Watkins Dominator extra stage?
  5. Power supply filtering
  6. Understanding/improving JTM60 FX LOOP
  7. 5E3 cascading inputs MAD FEEDBACK! Need fix
  8. Replace 2 x12" speakers with 1x 15", possible? Worth it?
  9. adding DC heaters to a high gain 100 watt amp
  10. ValveKing 100 mod questions
  11. Orange Dark Terror. Mod for more resonance.?
  12. Elevated AC heaters?
  13. Mods for a B-52 ST100A (can get one dirt cheap)
  14. Hum/Noise vs shielded cable or twisted wires in a Peavey Triumph 60
  15. A bit confused about V1 and V2 in my Mesa F-50
  16. LED activation from 5v winding?
  17. advice on more bass and treble from "Micro Champ"
  18. effects loop idea
  19. question about mods to valve amps
  20. Inexpensive L-Pads...
  21. Change led color and some mod to footswitch
  22. Hammond / Everett AO-50 conversion to Vox AC15
  23. Mesa Boogie F-50.. what is this?
  24. Question about using relays for foot s/w
  25. Bugera V22 Infinium CHOKE mod
  26. Opinions on a relay activated volume boost
  27. Bright Switch/Cap Wiring
  28. would a Master Volume solve my issue?
  29. MOSFET PI, how to Bias?
  30. Fender M80 Overdrive Channel
  31. Ampeg Ba 210 SP High EQ mod?
  32. Can't Turn Volume Completely Off
  33. Solder Both Sides of PCB?
  34. Adding gain stage to Marshall 2203; handling the 10k cold clipped stage
  35. Adding an on/off reverb switch to vintage amp
  36. Fender Twin Reverb
  37. DSL 100: Changing Grid Blockers and Bias Resistors
  38. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  39. Effects loop on a AC15CHWX
  40. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  41. Ampeg B-15 Preamp...
  42. Modding Boost Switch on Bugera V22
  43. 65 Blackface Fender Showman PPIMV
  44. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  45. Final tweaking of a 1959SLP Re-issue..
  46. JTM60/JCM600 important MODS
  47. Adding a choke to Sovtek Mig 60
  48. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  49. Peavey Triumph 60 Hum
  50. Fender Frontman Mod.
  51. Removing power valves to reduce output
  52. Fender Reverb Mods
  53. Vox DA5 lineout modification - speaker bypass
  54. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  55. Possible to add NFB to this schematic?
  56. lower wattage in 5E7A tweed pro?
  57. Peavey Classic 50 Blue Guitar Mods
  58. I think it's attenuater time
  59. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  60. Bassman AA568 unused triode applications
  61. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  62. Log/ Lin Bass Pot (DlxRev).
  63. EL34 in a Champ?
  64. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  65. 6150+ Mods and a real engineer guitarist!
  66. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  67. Thank you Valvewizard - Ground, hum blocking
  68. Replacement speakers poll
  69. Bias points
  70. 5150 bias mod
  71. Fender Pro Jr More Bass
  72. Trying New Speakers/replacements
  73. Marshall Amp increase Bass/low-mid response
  74. Can y'all help me with a minor mod to a Peavey Rage 158?
  75. Relay wiring for Vox Night Train mod
  76. Adding additional input output to Line6 spider ii amp
  77. Suggestion for moderator - let's spell "Tweeks" correctly!
  78. Looking for more gain mod schematic jcm800 2210
  79. Negative feedback loop mod for Pro Reverb
  80. Using Combo amp Speaker as Cab
  81. Marshall JVM
  82. Are SoZo blue caps the same as Fender blue caps?
  83. Line out help please
  84. I want to reduce the gain in my Peavey Rage 158.
  85. help with some peavey XXX mods
  86. Simplest way to turn a combo amp into both a head and a cab as well?
  87. Amp Mod for some More Gain?
  88. Bogen PA head for guitar? Help with pentode preamp stages.
  89. Another JTM60 1x12 thread/question... (haven't seen this one)
  90. Fender Blues Jnr Mk3 Mod
  91. What's this JCM800 mod do?
  92. What's this JCM800 mod do?
  93. Supro Inspired VVR Question
  94. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  95. Adding tube spring reverb to a Mesa Boogie SOB
  96. 5V4 instead of 5Y3 ?
  97. Bypass Digital Board in Super Champ XD (& possibly others)
  98. Epiphone valve standard to increase the treble
  99. Different Speaker Outputs On Marshall DSL 40C
  100. Help needed to upgrade Capacitors in a Marshall DSL 40C
  101. coupling cap to block some bass?
  102. Hicks mender
  103. 2015 VOX Ac30c2 service manual
  104. Drop preamp voltage
  105. Fun new zener tweak!
  106. Convert 5F6A Bassman into 5F8A Twin
  107. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  108. Newest Peavey Classic 30 - Blue Guitar Mods?
  109. Cathode bypass gain boost questions
  110. converting 6sc7 amp to use 6sl7
  111. 6CA7 tubes something different in the place of EL34 ??
  112. Remove ground lift network? JCM900 dual reverb
  113. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  114. JCM900 4500 Mod: C27 Jumper or...
  115. cathodyne/LTP switch (for small P-P amp)
  116. Replacing my tone control with an Orange-style shape control
  117. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  118. Fender Twin bias dilema
  119. Fender Ultralinear - KT66, 77 or KT88?
  120. Improved circuit for power tube tremolo in a fixed-bias amp
  121. Bias test points for PCB amp
  122. Fender Frontman 65R volume mod
  123. Peavey Classic VTX 65 watt combo question for Enzo
  124. Eyelet boarding a reissue amp (Fender)
  125. Which switch for high voltage switching?
  126. Carvin Belair - moding one channel
  127. Sound differences from different dual op amps in SS amps
  128. De-biasing a Peavey Classic VT (6L6 output stage)
  129. Tonestack help
  130. add an attenuator to an existing tweeter?
  131. mesa mk IV bias
  132. Conversion to acoustic amp
  133. Taming Fender Blues Deluxe Abrupt Volume Control
  134. Switchable VTM 60/120
  135. SF Twin reverb Ultra linear transformer Blackfacing
  136. Age Old Problem of TOOO Bright Super Reverb
  137. Deeper voicing on EVH5150iii
  138. Different types of power resistors
  139. What cap value for this idea?
  140. Mesa Nomad 55 Reduce the gain
  141. Vox Escort Mains/Battery amp power upgrade?
  142. Possible wrong installation of diodes in place of a 6X4
  143. Taming a Gibson tone stack
  144. "Tighter" Bass on a Tone King.
  145. Peavey xxx upgrades
  146. Cable runs and effect on tone
  147. Help with mod to Crate FW65 Combo
  148. Mesa .50cal EL84 version bias pot mod
  149. Switch ratings for mods with high voltage
  150. Musicman 75 head 2100EX too much overdrive
  151. Marshall DSL mod
  152. Any ideas for a temperature controlled fan for Bass amp
  153. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  154. Slitting speaker cone or knitting needle ? Kinks content
  155. Vox lead escort 50 - integrating valve stage
  156. LTPI on a 6G2?
  157. Adding a footswitch to a Blackstar HT-1
  158. Fender Deluxe 112 Plus Too LOUD
  159. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  160. Built-in solid state reverb circuit for tube amp homebrew...
  161. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  162. Silverfacing a Deluxe Reverb
  163. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  164. ROLAND BOLT 30- 60 cycle hum...
  165. Fender Bassman AA864 variant - mods
  166. Peavey 6505+ 112 mod for channel balance
  167. Peavey Valveking Modifications
  168. tightening up BF Princeton reverb ?
  169. Best way to increase bass response...
  170. E-Wave DG2-30RH head Clean channel too bright
  171. ENGL E320 clean vol mod
  172. Trem and Bias
  173. marshall 1987x hiss reduction possible?
  174. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  175. I wish to modify the tone stack in my Ashdown Mag 300 head.
  176. Using 12AT7 instead of 12AX7
  177. Subbing 12AU7 for 12AX7
  178. Any thoughts on how to "soften" attack on a Fender Bassman ?
  179. Fender Blues Junior excessive treble
  180. Looking for less low-cut in Randall RVC (like RD5C)
  181. Marshall JCM 900 mod
  182. Modding reverb
  183. Marshall Split channel again (some interesting information)
  184. Changing rectifier in a Ceriatone 5f6A Bassman
  185. guitar amp ->PA =cabulator
  186. Optocoupler in Fender tremolo
  187. Bugera 1960 infinium Schematic
  188. Epiphone Valve Junior OT upgrade -- help please???
  189. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  190. modifying the Fender Greta line out
  191. Wanna help with basic mods...
  192. B+ voltage drop via Zener/MOSFET question
  193. Minimum output impedance for Marshall Lead 12.
  194. Hammond drawbars - guitar
  195. Peavey Bravo modifications
  196. Hot Rod Deville upgrade
  197. Twin reverb new speakers
  198. 65 Princeton reverb reissue Power transformer pn# 75165 Where can I get one ??
  199. Converting a PCB Champion 600 to a handwired 5F1
  200. Magnatone M13 - Easy Gain Boost
  201. Marshall DSL 100 - Mod to Switchable (50/100 watts)
  202. Fender Hot Rod Deluxe volume pot replacement
  203. Peavey Classic 50 Blue Mods
  204. 12AU7 failed in Orange AD30
  205. Crate gxt-100 is now a BENGL two more related mods needed
  206. Line-In to Active EQ of Fender Super Twin?
  207. Peavey Bandit 65 mods, anyone have any good mods?
  208. Best SGRs?
  209. Fender Greta Tone Control Mod for Music Playing Purposes
  210. Switchable Cathode Bypass Cap help
  211. Adding another tube to a Crate GXT100
  212. 6V6 bias question
  213. Marshall JCM800 4210 Channel Switcher - modification - advice sought.
  214. My amp needs to be louder, said the novice
  215. Marshall Valvestate - Adding Cooling Fan?
  216. Help with Mesa mark V CH2 mod
  217. JCA22H too bright
  218. Crate Gxt-100 looking for any mods
  219. The beauty of a decade box: ab763 tweaks
  220. non-presence 12ax7 phase inverter
  221. bugera 333xl-212 tone stack mod + more
  222. Silverface to Blackface
  223. Rivera S120 Mods - Please Help!
  224. Orange tiny Terror fx loop mod ?
  225. Help on DIY F2B with mods
  226. Changing Plate resistor question.
  227. Compilation of BF Reverb Fender Mods
  228. Guild Thunderbass 50Watt power supply issues
  229. Dual independent bias for a Windsor
  230. Amp Maker SE5 extra gain stage
  231. large PI tail resistor
  232. Bucking Transformer Built In to Chassis
  233. Univox U45b Tremolo
  234. Jcm 2210 mod help
  235. VHT Special 6 Ultra Mods
  236. Mod/Tweak VHT Special 6 Combo
  237. CRATE VC-3112 4xEL84 to 2xEL84 mod?
  238. "Fender" remote reverb control Badabing ka-pow!
  239. A couple questions about Peavey Butcher mods (should also apply to VTM)
  240. 5F1 Champ Mods - component ratings?
  241. 68 Princeton Reverb Bias Mod Question
  242. Moving clean ch. Tonestack on a 2210. Good idea?
  243. Can I add a Piezo tweeter to Peavey KB100?
  244. L-pad question
  245. Blackstar HT-1 - Add reverb?
  246. Useful Matchless Cluman mods?
  247. Line 100v amp conversion ?
  248. Add choke to blues junior (mexico)
  249. Music Man RD50 112 6l6 to 6v6
  250. LOW Gain !