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  1. Replace 2 x12" speakers with 1x 15", possible? Worth it?
  2. adding DC heaters to a high gain 100 watt amp
  3. ValveKing 100 mod questions
  4. Orange Dark Terror. Mod for more resonance.?
  5. Elevated AC heaters?
  6. Mods for a B-52 ST100A (can get one dirt cheap)
  7. Hum/Noise vs shielded cable or twisted wires in a Peavey Triumph 60
  8. A bit confused about V1 and V2 in my Mesa F-50
  9. LED activation from 5v winding?
  10. advice on more bass and treble from "Micro Champ"
  11. effects loop idea
  12. question about mods to valve amps
  13. Inexpensive L-Pads...
  14. Change led color and some mod to footswitch
  15. Hammond / Everett AO-50 conversion to Vox AC15
  16. Mesa Boogie F-50.. what is this?
  17. Question about using relays for foot s/w
  18. Bugera V22 Infinium CHOKE mod
  19. Opinions on a relay activated volume boost
  20. Bright Switch/Cap Wiring
  21. would a Master Volume solve my issue?
  22. MOSFET PI, how to Bias?
  23. Fender M80 Overdrive Channel
  24. Ampeg Ba 210 SP High EQ mod?
  25. Can't Turn Volume Completely Off
  26. Solder Both Sides of PCB?
  27. Adding gain stage to Marshall 2203; handling the 10k cold clipped stage
  28. Adding an on/off reverb switch to vintage amp
  29. Fender Twin Reverb
  30. DSL 100: Changing Grid Blockers and Bias Resistors
  31. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  32. Effects loop on a AC15CHWX
  33. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  34. Ampeg B-15 Preamp...
  35. Modding Boost Switch on Bugera V22
  36. 65 Blackface Fender Showman PPIMV
  37. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  38. Final tweaking of a 1959SLP Re-issue..
  39. JTM60/JCM600 important MODS
  40. Adding a choke to Sovtek Mig 60
  41. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  42. Peavey Triumph 60 Hum
  43. Fender Frontman Mod.
  44. Removing power valves to reduce output
  45. Fender Reverb Mods
  46. Vox DA5 lineout modification - speaker bypass
  47. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  48. Possible to add NFB to this schematic?
  49. lower wattage in 5E7A tweed pro?
  50. Peavey Classic 50 Blue Guitar Mods
  51. I think it's attenuater time
  52. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  53. Bassman AA568 unused triode applications
  54. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  55. Log/ Lin Bass Pot (DlxRev).
  56. EL34 in a Champ?
  57. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  58. 6150+ Mods and a real engineer guitarist!
  59. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  60. Thank you Valvewizard - Ground, hum blocking
  61. Replacement speakers poll
  62. Bias points
  63. 5150 bias mod
  64. Fender Pro Jr More Bass
  65. Trying New Speakers/replacements
  66. Marshall Amp increase Bass/low-mid response
  67. Can y'all help me with a minor mod to a Peavey Rage 158?
  68. Relay wiring for Vox Night Train mod
  69. Adding additional input output to Line6 spider ii amp
  70. Suggestion for moderator - let's spell "Tweeks" correctly!
  71. Looking for more gain mod schematic jcm800 2210
  72. Negative feedback loop mod for Pro Reverb
  73. Using Combo amp Speaker as Cab
  74. Marshall JVM
  75. Are SoZo blue caps the same as Fender blue caps?
  76. Line out help please
  77. I want to reduce the gain in my Peavey Rage 158.
  78. help with some peavey XXX mods
  79. Simplest way to turn a combo amp into both a head and a cab as well?
  80. Amp Mod for some More Gain?
  81. Bogen PA head for guitar? Help with pentode preamp stages.
  82. Another JTM60 1x12 thread/question... (haven't seen this one)
  83. Fender Blues Jnr Mk3 Mod
  84. What's this JCM800 mod do?
  85. What's this JCM800 mod do?
  86. Supro Inspired VVR Question
  87. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  88. Adding tube spring reverb to a Mesa Boogie SOB
  89. 5V4 instead of 5Y3 ?
  90. Bypass Digital Board in Super Champ XD (& possibly others)
  91. Epiphone valve standard to increase the treble
  92. Different Speaker Outputs On Marshall DSL 40C
  93. Help needed to upgrade Capacitors in a Marshall DSL 40C
  94. coupling cap to block some bass?
  95. Hicks mender
  96. 2015 VOX Ac30c2 service manual
  97. Drop preamp voltage
  98. Fun new zener tweak!
  99. Convert 5F6A Bassman into 5F8A Twin
  100. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  101. Newest Peavey Classic 30 - Blue Guitar Mods?
  102. Cathode bypass gain boost questions
  103. converting 6sc7 amp to use 6sl7
  104. 6CA7 tubes something different in the place of EL34 ??
  105. Remove ground lift network? JCM900 dual reverb
  106. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  107. JCM900 4500 Mod: C27 Jumper or...
  108. cathodyne/LTP switch (for small P-P amp)
  109. Replacing my tone control with an Orange-style shape control
  110. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  111. Fender Twin bias dilema
  112. Fender Ultralinear - KT66, 77 or KT88?
  113. Improved circuit for power tube tremolo in a fixed-bias amp
  114. Bias test points for PCB amp
  115. Fender Frontman 65R volume mod
  116. Peavey Classic VTX 65 watt combo question for Enzo
  117. Eyelet boarding a reissue amp (Fender)
  118. Which switch for high voltage switching?
  119. Carvin Belair - moding one channel
  120. Sound differences from different dual op amps in SS amps
  121. De-biasing a Peavey Classic VT (6L6 output stage)
  122. Tonestack help
  123. add an attenuator to an existing tweeter?
  124. mesa mk IV bias
  125. Conversion to acoustic amp
  126. Taming Fender Blues Deluxe Abrupt Volume Control
  127. Switchable VTM 60/120
  128. SF Twin reverb Ultra linear transformer Blackfacing
  129. Age Old Problem of TOOO Bright Super Reverb
  130. Deeper voicing on EVH5150iii
  131. Different types of power resistors
  132. What cap value for this idea?
  133. Mesa Nomad 55 Reduce the gain
  134. Vox Escort Mains/Battery amp power upgrade?
  135. Possible wrong installation of diodes in place of a 6X4
  136. Taming a Gibson tone stack
  137. "Tighter" Bass on a Tone King.
  138. Peavey xxx upgrades
  139. Cable runs and effect on tone
  140. Help with mod to Crate FW65 Combo
  141. Mesa .50cal EL84 version bias pot mod
  142. Switch ratings for mods with high voltage
  143. Musicman 75 head 2100EX too much overdrive
  144. Marshall DSL mod
  145. Any ideas for a temperature controlled fan for Bass amp
  146. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  147. Slitting speaker cone or knitting needle ? Kinks content
  148. Vox lead escort 50 - integrating valve stage
  149. LTPI on a 6G2?
  150. Adding a footswitch to a Blackstar HT-1
  151. Fender Deluxe 112 Plus Too LOUD
  152. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  153. Built-in solid state reverb circuit for tube amp homebrew...
  154. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  155. Silverfacing a Deluxe Reverb
  156. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  157. ROLAND BOLT 30- 60 cycle hum...
  158. Fender Bassman AA864 variant - mods
  159. Peavey 6505+ 112 mod for channel balance
  160. Peavey Valveking Modifications
  161. tightening up BF Princeton reverb ?
  162. Best way to increase bass response...
  163. E-Wave DG2-30RH head Clean channel too bright
  164. ENGL E320 clean vol mod
  165. Trem and Bias
  166. marshall 1987x hiss reduction possible?
  167. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  168. I wish to modify the tone stack in my Ashdown Mag 300 head.
  169. Using 12AT7 instead of 12AX7
  170. Subbing 12AU7 for 12AX7
  171. Any thoughts on how to "soften" attack on a Fender Bassman ?
  172. Fender Blues Junior excessive treble
  173. Looking for less low-cut in Randall RVC (like RD5C)
  174. Marshall JCM 900 mod
  175. Modding reverb
  176. Marshall Split channel again (some interesting information)
  177. Changing rectifier in a Ceriatone 5f6A Bassman
  178. guitar amp ->PA =cabulator
  179. Optocoupler in Fender tremolo
  180. Bugera 1960 infinium Schematic
  181. Epiphone Valve Junior OT upgrade -- help please???
  182. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  183. modifying the Fender Greta line out
  184. Wanna help with basic mods...
  185. B+ voltage drop via Zener/MOSFET question
  186. Minimum output impedance for Marshall Lead 12.
  187. Hammond drawbars - guitar
  188. Peavey Bravo modifications
  189. Hot Rod Deville upgrade
  190. Twin reverb new speakers
  191. 65 Princeton reverb reissue Power transformer pn# 75165 Where can I get one ??
  192. Converting a PCB Champion 600 to a handwired 5F1
  193. Magnatone M13 - Easy Gain Boost
  194. Marshall DSL 100 - Mod to Switchable (50/100 watts)
  195. Fender Hot Rod Deluxe volume pot replacement
  196. Peavey Classic 50 Blue Mods
  197. 12AU7 failed in Orange AD30
  198. Crate gxt-100 is now a BENGL two more related mods needed
  199. Line-In to Active EQ of Fender Super Twin?
  200. Peavey Bandit 65 mods, anyone have any good mods?
  201. Best SGRs?
  202. Fender Greta Tone Control Mod for Music Playing Purposes
  203. Switchable Cathode Bypass Cap help
  204. Adding another tube to a Crate GXT100
  205. 6V6 bias question
  206. Marshall JCM800 4210 Channel Switcher - modification - advice sought.
  207. My amp needs to be louder, said the novice
  208. Marshall Valvestate - Adding Cooling Fan?
  209. Help with Mesa mark V CH2 mod
  210. JCA22H too bright
  211. Crate Gxt-100 looking for any mods
  212. The beauty of a decade box: ab763 tweaks
  213. non-presence 12ax7 phase inverter
  214. bugera 333xl-212 tone stack mod + more
  215. Silverface to Blackface
  216. Rivera S120 Mods - Please Help!
  217. Orange tiny Terror fx loop mod ?
  218. Help on DIY F2B with mods
  219. Changing Plate resistor question.
  220. Compilation of BF Reverb Fender Mods
  221. Guild Thunderbass 50Watt power supply issues
  222. Dual independent bias for a Windsor
  223. Amp Maker SE5 extra gain stage
  224. large PI tail resistor
  225. Bucking Transformer Built In to Chassis
  226. Univox U45b Tremolo
  227. Jcm 2210 mod help
  228. VHT Special 6 Ultra Mods
  229. Mod/Tweak VHT Special 6 Combo
  230. CRATE VC-3112 4xEL84 to 2xEL84 mod?
  231. "Fender" remote reverb control Badabing ka-pow!
  232. A couple questions about Peavey Butcher mods (should also apply to VTM)
  233. 5F1 Champ Mods - component ratings?
  234. 68 Princeton Reverb Bias Mod Question
  235. Moving clean ch. Tonestack on a 2210. Good idea?
  236. Can I add a Piezo tweeter to Peavey KB100?
  237. L-pad question
  238. Blackstar HT-1 - Add reverb?
  239. Useful Matchless Cluman mods?
  240. Line 100v amp conversion ?
  241. Add choke to blues junior (mexico)
  242. Music Man RD50 112 6l6 to 6v6
  243. LOW Gain !
  244. Looking for Bright options...
  245. DSL 401 mods
  246. prosonic combo weak reverb
  247. Marshall AVT50 cd input too loud
  248. Princeton 112 Plus - Shutdown MOD
  249. Fender Bassman output waveform oscillations
  250. PPIMV in SF Twin 135