View Full Version : Mods & Tweaks

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  1. Tubes that can handle 500VDC on screens, or tame the power supply??
  2. Exportizing my Vibro Champ - Part II: alternative switching.
  3. Active Passive Input
  4. EVH 5150 III, change from 6l6GC to EL34?
  5. Ashdown CTM100 Bass Valve head
  6. How to properly ground an input isolated/output grounded reverb tank?
  7. 72 SF bassman mod
  8. B52 AT112 drive channel mod
  9. 2017 fender 65 deluxe reissue
  10. Marshall JVM205 Cathode Follower Death, Sprial Filaments and Internet Mendacity
  11. Rennovating Bassman head...
  12. Fender Princeton Chorus - Taming the drive channel
  13. Stupid FX Loop Question
  14. BadCat Hotcat 30R reverb
  15. Vox V100/AC100 MKII Bias Mod
  16. Running Both Channels On Fender/Marshall Amps (switchable)?
  17. Fuse question--SF-VC export conversion
  18. Boss CE-1 modding lights
  19. Has anybody done the Mercury "Holy Terror" mod?
  20. Reverb mod for Fender type circuits
  21. Fender Twin Reverb Reissue vibrato
  22. Bass amp opamp tweaking
  23. xmas Candle/Lamp Switched by 120Vac supply on amp [just blinks ?
  24. Yamaha / Soldanop T100
  25. Peavey Delta Blues boost mod
  26. Bias after pulling out two power tubes?
  27. Mod Bass Channel on A Fender Bassman AB165
  28. FX Loop install
  29. Fender Princeton reverb AA764 preamp output jack install.
  30. JCM900 Tone stack mod 4101 50watt combo
  31. PPIMV on a jcm800/2204 yes or no ? .. I don't really like it
  32. Phase Inverter Cathode Bypass
  33. A few simple mods for my Old Canadian Pepco
  34. Marshall JCM800 2210 questions
  35. Voice of Music Model 1450
  36. Want to mod my Diamond SpecOp to Nitrox
  37. EVH 5150 MK3 mini head reducing the gain
  38. Ground reference for DC fan supply?
  39. Taming Fender Red Knob Dual Showman
  40. power tube preference in jcm 900 4500
  41. lowering the presence
  42. ch switch
  43. Importance of grid-stopper in interstage coupling?
  44. Cathode bypass capacitors: Electrolytic vs. film?
  45. Hooking a Charvel to a Fender
  46. Adding spring reverb to a practice amp board already printed for spring reverb?
  47. Mackie Power supply
  48. Metal film cap sizes.
  49. b-52 at112 60 mod for el 34's
  50. Marshall dsl 401 volume OD2 mod.
  51. Tremolo intensity on Univox U42/45
  52. A Cleaner Clean Channel
  53. Mooer Elec Lady Flanger - Volume Drop Mod
  54. Reducing Voltage On Laney Supergroup 60 Watt
  55. Looking for the dookie mod
  56. Sano 50 WRT - convert 8417 to 6550 or 6L6
  57. Can I "Raw Control" or Tone Stack bypass pot?
  58. How to test output transformer performance for overperforming amp
  59. Mads Vox ac30c2
  60. 12AY7 PI tube, good, bad or ugly? Your thoughts please.
  61. 5f1 champ w/electronic reverb
  62. reducing reverb effect in deluxe reverb aa763 circuit?
  63. Champ 600 EQ mod balls-up!
  64. More Thomas Vox repair manuals
  65. Negative feedback, and resonance question?
  66. BF Princeton Reverb - wider range for treble pot
  67. Schematic question?
  68. Preamp stage help please.
  69. Modding gain stage on amp
  70. How does this look for a boosted up reverb unit circuit?
  71. Peavey Delta Blues Distorted
  72. Teach me a little something about NFB in a Deluxe Reverb
  73. 65 ReIssue Super Reverb Midrange Pot change
  74. Tweed Deluxe Coupling Cap Changes
  75. Suggested Mods for Peavey Butcher - Negative Feedback Loop Tone control?
  76. Adjustable bias and measuring points Valve King 112
  77. Peavey Artist VT resonance & presence mods
  78. Marshall JTM 60 choke mod
  79. Peavey Valveking Pre PI Master Volume mod Thoughts?
  80. THD picovalve
  81. Marshall dsl 15 h mod help
  82. Watkins Dominator extra stage?
  83. Power supply filtering
  84. Understanding/improving JTM60 FX LOOP
  85. 5E3 cascading inputs MAD FEEDBACK! Need fix
  86. Replace 2 x12" speakers with 1x 15", possible? Worth it?
  87. adding DC heaters to a high gain 100 watt amp
  88. ValveKing 100 mod questions
  89. Orange Dark Terror. Mod for more resonance.?
  90. Elevated AC heaters?
  91. Mods for a B-52 ST100A (can get one dirt cheap)
  92. Hum/Noise vs shielded cable or twisted wires in a Peavey Triumph 60
  93. A bit confused about V1 and V2 in my Mesa F-50
  94. LED activation from 5v winding?
  95. advice on more bass and treble from "Micro Champ"
  96. effects loop idea
  97. question about mods to valve amps
  98. Inexpensive L-Pads...
  99. Change led color and some mod to footswitch
  100. Hammond / Everett AO-50 conversion to Vox AC15
  101. Mesa Boogie F-50.. what is this?
  102. Question about using relays for foot s/w
  103. Bugera V22 Infinium CHOKE mod
  104. Opinions on a relay activated volume boost
  105. Bright Switch/Cap Wiring
  106. would a Master Volume solve my issue?
  107. MOSFET PI, how to Bias?
  108. Fender M80 Overdrive Channel
  109. Ampeg Ba 210 SP High EQ mod?
  110. Can't Turn Volume Completely Off
  111. Solder Both Sides of PCB?
  112. Adding gain stage to Marshall 2203; handling the 10k cold clipped stage
  113. Adding an on/off reverb switch to vintage amp
  114. Fender Twin Reverb
  115. DSL 100: Changing Grid Blockers and Bias Resistors
  116. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  117. Effects loop on a AC15CHWX
  118. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  119. Ampeg B-15 Preamp...
  120. Modding Boost Switch on Bugera V22
  121. 65 Blackface Fender Showman PPIMV
  122. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  123. Final tweaking of a 1959SLP Re-issue..
  124. JTM60/JCM600 important MODS
  125. Adding a choke to Sovtek Mig 60
  126. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  127. Peavey Triumph 60 Hum
  128. Fender Frontman Mod.
  129. Removing power valves to reduce output
  130. Fender Reverb Mods
  131. Vox DA5 lineout modification - speaker bypass
  132. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  133. Possible to add NFB to this schematic?
  134. lower wattage in 5E7A tweed pro?
  135. Peavey Classic 50 Blue Guitar Mods
  136. I think it's attenuater time
  137. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  138. Bassman AA568 unused triode applications
  139. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  140. Log/ Lin Bass Pot (DlxRev).
  141. EL34 in a Champ?
  142. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  143. 6150+ Mods and a real engineer guitarist!
  144. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  145. Thank you Valvewizard - Ground, hum blocking
  146. Replacement speakers poll
  147. Bias points
  148. 5150 bias mod
  149. Fender Pro Jr More Bass
  150. Trying New Speakers/replacements
  151. Marshall Amp increase Bass/low-mid response
  152. Can y'all help me with a minor mod to a Peavey Rage 158?
  153. Relay wiring for Vox Night Train mod
  154. Adding additional input output to Line6 spider ii amp
  155. Suggestion for moderator - let's spell "Tweeks" correctly!
  156. Looking for more gain mod schematic jcm800 2210
  157. Negative feedback loop mod for Pro Reverb
  158. Using Combo amp Speaker as Cab
  159. Marshall JVM
  160. Are SoZo blue caps the same as Fender blue caps?
  161. Line out help please
  162. I want to reduce the gain in my Peavey Rage 158.
  163. help with some peavey XXX mods
  164. Simplest way to turn a combo amp into both a head and a cab as well?
  165. Amp Mod for some More Gain?
  166. Bogen PA head for guitar? Help with pentode preamp stages.
  167. Another JTM60 1x12 thread/question... (haven't seen this one)
  168. Fender Blues Jnr Mk3 Mod
  169. What's this JCM800 mod do?
  170. What's this JCM800 mod do?
  171. Supro Inspired VVR Question
  172. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  173. Adding tube spring reverb to a Mesa Boogie SOB
  174. 5V4 instead of 5Y3 ?
  175. Bypass Digital Board in Super Champ XD (& possibly others)
  176. Epiphone valve standard to increase the treble
  177. Different Speaker Outputs On Marshall DSL 40C
  178. Help needed to upgrade Capacitors in a Marshall DSL 40C
  179. coupling cap to block some bass?
  180. Hicks mender
  181. 2015 VOX Ac30c2 service manual
  182. Drop preamp voltage
  183. Fun new zener tweak!
  184. Convert 5F6A Bassman into 5F8A Twin
  185. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  186. Newest Peavey Classic 30 - Blue Guitar Mods?
  187. Cathode bypass gain boost questions
  188. converting 6sc7 amp to use 6sl7
  189. 6CA7 tubes something different in the place of EL34 ??
  190. Remove ground lift network? JCM900 dual reverb
  191. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  192. JCM900 4500 Mod: C27 Jumper or...
  193. cathodyne/LTP switch (for small P-P amp)
  194. Replacing my tone control with an Orange-style shape control
  195. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  196. Fender Twin bias dilema
  197. Fender Ultralinear - KT66, 77 or KT88?
  198. Improved circuit for power tube tremolo in a fixed-bias amp
  199. Bias test points for PCB amp
  200. Fender Frontman 65R volume mod
  201. Peavey Classic VTX 65 watt combo question for Enzo
  202. Eyelet boarding a reissue amp (Fender)
  203. Which switch for high voltage switching?
  204. Carvin Belair - moding one channel
  205. Sound differences from different dual op amps in SS amps
  206. De-biasing a Peavey Classic VT (6L6 output stage)
  207. Tonestack help
  208. add an attenuator to an existing tweeter?
  209. mesa mk IV bias
  210. Conversion to acoustic amp
  211. Taming Fender Blues Deluxe Abrupt Volume Control
  212. Switchable VTM 60/120
  213. SF Twin reverb Ultra linear transformer Blackfacing
  214. Age Old Problem of TOOO Bright Super Reverb
  215. Deeper voicing on EVH5150iii
  216. Different types of power resistors
  217. What cap value for this idea?
  218. Mesa Nomad 55 Reduce the gain
  219. Vox Escort Mains/Battery amp power upgrade?
  220. Possible wrong installation of diodes in place of a 6X4
  221. Taming a Gibson tone stack
  222. "Tighter" Bass on a Tone King.
  223. Peavey xxx upgrades
  224. Cable runs and effect on tone
  225. Help with mod to Crate FW65 Combo
  226. Mesa .50cal EL84 version bias pot mod
  227. Switch ratings for mods with high voltage
  228. Musicman 75 head 2100EX too much overdrive
  229. Marshall DSL mod
  230. Any ideas for a temperature controlled fan for Bass amp
  231. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  232. Slitting speaker cone or knitting needle ? Kinks content
  233. Vox lead escort 50 - integrating valve stage
  234. LTPI on a 6G2?
  235. Adding a footswitch to a Blackstar HT-1
  236. Fender Deluxe 112 Plus Too LOUD
  237. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  238. Built-in solid state reverb circuit for tube amp homebrew...
  239. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  240. Silverfacing a Deluxe Reverb
  241. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  242. ROLAND BOLT 30- 60 cycle hum...
  243. Fender Bassman AA864 variant - mods
  244. Peavey 6505+ 112 mod for channel balance
  245. Peavey Valveking Modifications
  246. tightening up BF Princeton reverb ?
  247. Best way to increase bass response...
  248. E-Wave DG2-30RH head Clean channel too bright
  249. ENGL E320 clean vol mod
  250. Trem and Bias