View Full Version : Mods & Tweaks

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  1. Yamaha / Soldanop T100
  2. Peavey Delta Blues boost mod
  3. Bias after pulling out two power tubes?
  4. Mod Bass Channel on A Fender Bassman AB165
  5. FX Loop install
  6. Fender Princeton reverb AA764 preamp output jack install.
  7. JCM900 Tone stack mod 4101 50watt combo
  8. PPIMV on a jcm800/2204 yes or no ? .. I don't really like it
  9. Phase Inverter Cathode Bypass
  10. A few simple mods for my Old Canadian Pepco
  11. Marshall JCM800 2210 questions
  12. Voice of Music Model 1450
  13. Want to mod my Diamond SpecOp to Nitrox
  14. EVH 5150 MK3 mini head reducing the gain
  15. Ground reference for DC fan supply?
  16. Taming Fender Red Knob Dual Showman
  17. power tube preference in jcm 900 4500
  18. lowering the presence
  19. ch switch
  20. Importance of grid-stopper in interstage coupling?
  21. Cathode bypass capacitors: Electrolytic vs. film?
  22. Hooking a Charvel to a Fender
  23. Adding spring reverb to a practice amp board already printed for spring reverb?
  24. Mackie Power supply
  25. Metal film cap sizes.
  26. b-52 at112 60 mod for el 34's
  27. Marshall dsl 401 volume OD2 mod.
  28. Tremolo intensity on Univox U42/45
  29. A Cleaner Clean Channel
  30. Mooer Elec Lady Flanger - Volume Drop Mod
  31. Reducing Voltage On Laney Supergroup 60 Watt
  32. Looking for the dookie mod
  33. Sano 50 WRT - convert 8417 to 6550 or 6L6
  34. Can I "Raw Control" or Tone Stack bypass pot?
  35. How to test output transformer performance for overperforming amp
  36. Mads Vox ac30c2
  37. 12AY7 PI tube, good, bad or ugly? Your thoughts please.
  38. 5f1 champ w/electronic reverb
  39. reducing reverb effect in deluxe reverb aa763 circuit?
  40. Champ 600 EQ mod balls-up!
  41. More Thomas Vox repair manuals
  42. Negative feedback, and resonance question?
  43. BF Princeton Reverb - wider range for treble pot
  44. Schematic question?
  45. Preamp stage help please.
  46. Modding gain stage on amp
  47. How does this look for a boosted up reverb unit circuit?
  48. Peavey Delta Blues Distorted
  49. Teach me a little something about NFB in a Deluxe Reverb
  50. 65 ReIssue Super Reverb Midrange Pot change
  51. Tweed Deluxe Coupling Cap Changes
  52. Suggested Mods for Peavey Butcher - Negative Feedback Loop Tone control?
  53. Adjustable bias and measuring points Valve King 112
  54. Peavey Artist VT resonance & presence mods
  55. Marshall JTM 60 choke mod
  56. Peavey Valveking Pre PI Master Volume mod Thoughts?
  57. THD picovalve
  58. Marshall dsl 15 h mod help
  59. Watkins Dominator extra stage?
  60. Power supply filtering
  61. Understanding/improving JTM60 FX LOOP
  62. 5E3 cascading inputs MAD FEEDBACK! Need fix
  63. Replace 2 x12" speakers with 1x 15", possible? Worth it?
  64. adding DC heaters to a high gain 100 watt amp
  65. ValveKing 100 mod questions
  66. Orange Dark Terror. Mod for more resonance.?
  67. Elevated AC heaters?
  68. Mods for a B-52 ST100A (can get one dirt cheap)
  69. Hum/Noise vs shielded cable or twisted wires in a Peavey Triumph 60
  70. A bit confused about V1 and V2 in my Mesa F-50
  71. LED activation from 5v winding?
  72. advice on more bass and treble from "Micro Champ"
  73. effects loop idea
  74. question about mods to valve amps
  75. Inexpensive L-Pads...
  76. Change led color and some mod to footswitch
  77. Hammond / Everett AO-50 conversion to Vox AC15
  78. Mesa Boogie F-50.. what is this?
  79. Question about using relays for foot s/w
  80. Bugera V22 Infinium CHOKE mod
  81. Opinions on a relay activated volume boost
  82. Bright Switch/Cap Wiring
  83. would a Master Volume solve my issue?
  84. MOSFET PI, how to Bias?
  85. Fender M80 Overdrive Channel
  86. Ampeg Ba 210 SP High EQ mod?
  87. Can't Turn Volume Completely Off
  88. Solder Both Sides of PCB?
  89. Adding gain stage to Marshall 2203; handling the 10k cold clipped stage
  90. Adding an on/off reverb switch to vintage amp
  91. Fender Twin Reverb
  92. DSL 100: Changing Grid Blockers and Bias Resistors
  93. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  94. Effects loop on a AC15CHWX
  95. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  96. Ampeg B-15 Preamp...
  97. Modding Boost Switch on Bugera V22
  98. 65 Blackface Fender Showman PPIMV
  99. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  100. Final tweaking of a 1959SLP Re-issue..
  101. JTM60/JCM600 important MODS
  102. Adding a choke to Sovtek Mig 60
  103. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  104. Peavey Triumph 60 Hum
  105. Fender Frontman Mod.
  106. Removing power valves to reduce output
  107. Fender Reverb Mods
  108. Vox DA5 lineout modification - speaker bypass
  109. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  110. Possible to add NFB to this schematic?
  111. lower wattage in 5E7A tweed pro?
  112. Peavey Classic 50 Blue Guitar Mods
  113. I think it's attenuater time
  114. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  115. Bassman AA568 unused triode applications
  116. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  117. Log/ Lin Bass Pot (DlxRev).
  118. EL34 in a Champ?
  119. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  120. 6150+ Mods and a real engineer guitarist!
  121. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  122. Thank you Valvewizard - Ground, hum blocking
  123. Replacement speakers poll
  124. Bias points
  125. 5150 bias mod
  126. Fender Pro Jr More Bass
  127. Trying New Speakers/replacements
  128. Marshall Amp increase Bass/low-mid response
  129. Can y'all help me with a minor mod to a Peavey Rage 158?
  130. Relay wiring for Vox Night Train mod
  131. Adding additional input output to Line6 spider ii amp
  132. Suggestion for moderator - let's spell "Tweeks" correctly!
  133. Looking for more gain mod schematic jcm800 2210
  134. Negative feedback loop mod for Pro Reverb
  135. Using Combo amp Speaker as Cab
  136. Marshall JVM
  137. Are SoZo blue caps the same as Fender blue caps?
  138. Line out help please
  139. I want to reduce the gain in my Peavey Rage 158.
  140. help with some peavey XXX mods
  141. Simplest way to turn a combo amp into both a head and a cab as well?
  142. Amp Mod for some More Gain?
  143. Bogen PA head for guitar? Help with pentode preamp stages.
  144. Another JTM60 1x12 thread/question... (haven't seen this one)
  145. Fender Blues Jnr Mk3 Mod
  146. What's this JCM800 mod do?
  147. What's this JCM800 mod do?
  148. Supro Inspired VVR Question
  149. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  150. Adding tube spring reverb to a Mesa Boogie SOB
  151. 5V4 instead of 5Y3 ?
  152. Bypass Digital Board in Super Champ XD (& possibly others)
  153. Epiphone valve standard to increase the treble
  154. Different Speaker Outputs On Marshall DSL 40C
  155. Help needed to upgrade Capacitors in a Marshall DSL 40C
  156. coupling cap to block some bass?
  157. Hicks mender
  158. 2015 VOX Ac30c2 service manual
  159. Drop preamp voltage
  160. Fun new zener tweak!
  161. Convert 5F6A Bassman into 5F8A Twin
  162. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  163. Newest Peavey Classic 30 - Blue Guitar Mods?
  164. Cathode bypass gain boost questions
  165. converting 6sc7 amp to use 6sl7
  166. 6CA7 tubes something different in the place of EL34 ??
  167. Remove ground lift network? JCM900 dual reverb
  168. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  169. JCM900 4500 Mod: C27 Jumper or...
  170. cathodyne/LTP switch (for small P-P amp)
  171. Replacing my tone control with an Orange-style shape control
  172. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  173. Fender Twin bias dilema
  174. Fender Ultralinear - KT66, 77 or KT88?
  175. Improved circuit for power tube tremolo in a fixed-bias amp
  176. Bias test points for PCB amp
  177. Fender Frontman 65R volume mod
  178. Peavey Classic VTX 65 watt combo question for Enzo
  179. Eyelet boarding a reissue amp (Fender)
  180. Which switch for high voltage switching?
  181. Carvin Belair - moding one channel
  182. Sound differences from different dual op amps in SS amps
  183. De-biasing a Peavey Classic VT (6L6 output stage)
  184. Tonestack help
  185. add an attenuator to an existing tweeter?
  186. mesa mk IV bias
  187. Conversion to acoustic amp
  188. Taming Fender Blues Deluxe Abrupt Volume Control
  189. Switchable VTM 60/120
  190. SF Twin reverb Ultra linear transformer Blackfacing
  191. Age Old Problem of TOOO Bright Super Reverb
  192. Deeper voicing on EVH5150iii
  193. Different types of power resistors
  194. What cap value for this idea?
  195. Mesa Nomad 55 Reduce the gain
  196. Vox Escort Mains/Battery amp power upgrade?
  197. Possible wrong installation of diodes in place of a 6X4
  198. Taming a Gibson tone stack
  199. "Tighter" Bass on a Tone King.
  200. Peavey xxx upgrades
  201. Cable runs and effect on tone
  202. Help with mod to Crate FW65 Combo
  203. Mesa .50cal EL84 version bias pot mod
  204. Switch ratings for mods with high voltage
  205. Musicman 75 head 2100EX too much overdrive
  206. Marshall DSL mod
  207. Any ideas for a temperature controlled fan for Bass amp
  208. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  209. Slitting speaker cone or knitting needle ? Kinks content
  210. Vox lead escort 50 - integrating valve stage
  211. LTPI on a 6G2?
  212. Adding a footswitch to a Blackstar HT-1
  213. Fender Deluxe 112 Plus Too LOUD
  214. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  215. Built-in solid state reverb circuit for tube amp homebrew...
  216. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  217. Silverfacing a Deluxe Reverb
  218. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  219. ROLAND BOLT 30- 60 cycle hum...
  220. Fender Bassman AA864 variant - mods
  221. Peavey 6505+ 112 mod for channel balance
  222. Peavey Valveking Modifications
  223. tightening up BF Princeton reverb ?
  224. Best way to increase bass response...
  225. E-Wave DG2-30RH head Clean channel too bright
  226. ENGL E320 clean vol mod
  227. Trem and Bias
  228. marshall 1987x hiss reduction possible?
  229. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  230. I wish to modify the tone stack in my Ashdown Mag 300 head.
  231. Using 12AT7 instead of 12AX7
  232. Subbing 12AU7 for 12AX7
  233. Any thoughts on how to "soften" attack on a Fender Bassman ?
  234. Fender Blues Junior excessive treble
  235. Looking for less low-cut in Randall RVC (like RD5C)
  236. Marshall JCM 900 mod
  237. Modding reverb
  238. Marshall Split channel again (some interesting information)
  239. Changing rectifier in a Ceriatone 5f6A Bassman
  240. guitar amp ->PA =cabulator
  241. Optocoupler in Fender tremolo
  242. Bugera 1960 infinium Schematic
  243. Epiphone Valve Junior OT upgrade -- help please???
  244. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  245. modifying the Fender Greta line out
  246. Wanna help with basic mods...
  247. B+ voltage drop via Zener/MOSFET question
  248. Minimum output impedance for Marshall Lead 12.
  249. Hammond drawbars - guitar
  250. Peavey Bravo modifications