View Full Version : Mods & Tweaks

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  1. Marshall dsl 401 volume OD2 mod.
  2. Tremolo intensity on Univox U42/45
  3. A Cleaner Clean Channel
  4. Mooer Elec Lady Flanger - Volume Drop Mod
  5. Reducing Voltage On Laney Supergroup 60 Watt
  6. Looking for the dookie mod
  7. Sano 50 WRT - convert 8417 to 6550 or 6L6
  8. Can I "Raw Control" or Tone Stack bypass pot?
  9. How to test output transformer performance for overperforming amp
  10. Mads Vox ac30c2
  11. 12AY7 PI tube, good, bad or ugly? Your thoughts please.
  12. 5f1 champ w/electronic reverb
  13. reducing reverb effect in deluxe reverb aa763 circuit?
  14. Champ 600 EQ mod balls-up!
  15. More Thomas Vox repair manuals
  16. Negative feedback, and resonance question?
  17. BF Princeton Reverb - wider range for treble pot
  18. Schematic question?
  19. Preamp stage help please.
  20. Modding gain stage on amp
  21. How does this look for a boosted up reverb unit circuit?
  22. Peavey Delta Blues Distorted
  23. Teach me a little something about NFB in a Deluxe Reverb
  24. 65 ReIssue Super Reverb Midrange Pot change
  25. Tweed Deluxe Coupling Cap Changes
  26. Suggested Mods for Peavey Butcher - Negative Feedback Loop Tone control?
  27. Adjustable bias and measuring points Valve King 112
  28. Peavey Artist VT resonance & presence mods
  29. Marshall JTM 60 choke mod
  30. Peavey Valveking Pre PI Master Volume mod Thoughts?
  31. THD picovalve
  32. Marshall dsl 15 h mod help
  33. Watkins Dominator extra stage?
  34. Power supply filtering
  35. Understanding/improving JTM60 FX LOOP
  36. 5E3 cascading inputs MAD FEEDBACK! Need fix
  37. Replace 2 x12" speakers with 1x 15", possible? Worth it?
  38. adding DC heaters to a high gain 100 watt amp
  39. ValveKing 100 mod questions
  40. Orange Dark Terror. Mod for more resonance.?
  41. Elevated AC heaters?
  42. Mods for a B-52 ST100A (can get one dirt cheap)
  43. Hum/Noise vs shielded cable or twisted wires in a Peavey Triumph 60
  44. A bit confused about V1 and V2 in my Mesa F-50
  45. LED activation from 5v winding?
  46. advice on more bass and treble from "Micro Champ"
  47. effects loop idea
  48. question about mods to valve amps
  49. Inexpensive L-Pads...
  50. Change led color and some mod to footswitch
  51. Hammond / Everett AO-50 conversion to Vox AC15
  52. Mesa Boogie F-50.. what is this?
  53. Question about using relays for foot s/w
  54. Bugera V22 Infinium CHOKE mod
  55. Opinions on a relay activated volume boost
  56. Bright Switch/Cap Wiring
  57. would a Master Volume solve my issue?
  58. MOSFET PI, how to Bias?
  59. Fender M80 Overdrive Channel
  60. Ampeg Ba 210 SP High EQ mod?
  61. Can't Turn Volume Completely Off
  62. Solder Both Sides of PCB?
  63. Adding gain stage to Marshall 2203; handling the 10k cold clipped stage
  64. Adding an on/off reverb switch to vintage amp
  65. Fender Twin Reverb
  66. DSL 100: Changing Grid Blockers and Bias Resistors
  67. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  68. Effects loop on a AC15CHWX
  69. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  70. Ampeg B-15 Preamp...
  71. Modding Boost Switch on Bugera V22
  72. 65 Blackface Fender Showman PPIMV
  73. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  74. Final tweaking of a 1959SLP Re-issue..
  75. JTM60/JCM600 important MODS
  76. Adding a choke to Sovtek Mig 60
  77. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  78. Peavey Triumph 60 Hum
  79. Fender Frontman Mod.
  80. Removing power valves to reduce output
  81. Fender Reverb Mods
  82. Vox DA5 lineout modification - speaker bypass
  83. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  84. Possible to add NFB to this schematic?
  85. lower wattage in 5E7A tweed pro?
  86. Peavey Classic 50 Blue Guitar Mods
  87. I think it's attenuater time
  88. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  89. Bassman AA568 unused triode applications
  90. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  91. Log/ Lin Bass Pot (DlxRev).
  92. EL34 in a Champ?
  93. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  94. 6150+ Mods and a real engineer guitarist!
  95. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  96. Thank you Valvewizard - Ground, hum blocking
  97. Replacement speakers poll
  98. Bias points
  99. 5150 bias mod
  100. Fender Pro Jr More Bass
  101. Trying New Speakers/replacements
  102. Marshall Amp increase Bass/low-mid response
  103. Can y'all help me with a minor mod to a Peavey Rage 158?
  104. Relay wiring for Vox Night Train mod
  105. Adding additional input output to Line6 spider ii amp
  106. Suggestion for moderator - let's spell "Tweeks" correctly!
  107. Looking for more gain mod schematic jcm800 2210
  108. Negative feedback loop mod for Pro Reverb
  109. Using Combo amp Speaker as Cab
  110. Marshall JVM
  111. Are SoZo blue caps the same as Fender blue caps?
  112. Line out help please
  113. I want to reduce the gain in my Peavey Rage 158.
  114. help with some peavey XXX mods
  115. Simplest way to turn a combo amp into both a head and a cab as well?
  116. Amp Mod for some More Gain?
  117. Bogen PA head for guitar? Help with pentode preamp stages.
  118. Another JTM60 1x12 thread/question... (haven't seen this one)
  119. Fender Blues Jnr Mk3 Mod
  120. What's this JCM800 mod do?
  121. What's this JCM800 mod do?
  122. Supro Inspired VVR Question
  123. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  124. Adding tube spring reverb to a Mesa Boogie SOB
  125. 5V4 instead of 5Y3 ?
  126. Bypass Digital Board in Super Champ XD (& possibly others)
  127. Epiphone valve standard to increase the treble
  128. Different Speaker Outputs On Marshall DSL 40C
  129. Help needed to upgrade Capacitors in a Marshall DSL 40C
  130. coupling cap to block some bass?
  131. Hicks mender
  132. 2015 VOX Ac30c2 service manual
  133. Drop preamp voltage
  134. Fun new zener tweak!
  135. Convert 5F6A Bassman into 5F8A Twin
  136. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  137. Newest Peavey Classic 30 - Blue Guitar Mods?
  138. Cathode bypass gain boost questions
  139. converting 6sc7 amp to use 6sl7
  140. 6CA7 tubes something different in the place of EL34 ??
  141. Remove ground lift network? JCM900 dual reverb
  142. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  143. JCM900 4500 Mod: C27 Jumper or...
  144. cathodyne/LTP switch (for small P-P amp)
  145. Replacing my tone control with an Orange-style shape control
  146. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  147. Fender Twin bias dilema
  148. Fender Ultralinear - KT66, 77 or KT88?
  149. Improved circuit for power tube tremolo in a fixed-bias amp
  150. Bias test points for PCB amp
  151. Fender Frontman 65R volume mod
  152. Peavey Classic VTX 65 watt combo question for Enzo
  153. Eyelet boarding a reissue amp (Fender)
  154. Which switch for high voltage switching?
  155. Carvin Belair - moding one channel
  156. Sound differences from different dual op amps in SS amps
  157. De-biasing a Peavey Classic VT (6L6 output stage)
  158. Tonestack help
  159. add an attenuator to an existing tweeter?
  160. mesa mk IV bias
  161. Conversion to acoustic amp
  162. Taming Fender Blues Deluxe Abrupt Volume Control
  163. Switchable VTM 60/120
  164. SF Twin reverb Ultra linear transformer Blackfacing
  165. Age Old Problem of TOOO Bright Super Reverb
  166. Deeper voicing on EVH5150iii
  167. Different types of power resistors
  168. What cap value for this idea?
  169. Mesa Nomad 55 Reduce the gain
  170. Vox Escort Mains/Battery amp power upgrade?
  171. Possible wrong installation of diodes in place of a 6X4
  172. Taming a Gibson tone stack
  173. "Tighter" Bass on a Tone King.
  174. Peavey xxx upgrades
  175. Cable runs and effect on tone
  176. Help with mod to Crate FW65 Combo
  177. Mesa .50cal EL84 version bias pot mod
  178. Switch ratings for mods with high voltage
  179. Musicman 75 head 2100EX too much overdrive
  180. Marshall DSL mod
  181. Any ideas for a temperature controlled fan for Bass amp
  182. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  183. Slitting speaker cone or knitting needle ? Kinks content
  184. Vox lead escort 50 - integrating valve stage
  185. LTPI on a 6G2?
  186. Adding a footswitch to a Blackstar HT-1
  187. Fender Deluxe 112 Plus Too LOUD
  188. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  189. Built-in solid state reverb circuit for tube amp homebrew...
  190. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  191. Silverfacing a Deluxe Reverb
  192. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  193. ROLAND BOLT 30- 60 cycle hum...
  194. Fender Bassman AA864 variant - mods
  195. Peavey 6505+ 112 mod for channel balance
  196. Peavey Valveking Modifications
  197. tightening up BF Princeton reverb ?
  198. Best way to increase bass response...
  199. E-Wave DG2-30RH head Clean channel too bright
  200. ENGL E320 clean vol mod
  201. Trem and Bias
  202. marshall 1987x hiss reduction possible?
  203. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  204. I wish to modify the tone stack in my Ashdown Mag 300 head.
  205. Using 12AT7 instead of 12AX7
  206. Subbing 12AU7 for 12AX7
  207. Any thoughts on how to "soften" attack on a Fender Bassman ?
  208. Fender Blues Junior excessive treble
  209. Looking for less low-cut in Randall RVC (like RD5C)
  210. Marshall JCM 900 mod
  211. Modding reverb
  212. Marshall Split channel again (some interesting information)
  213. Changing rectifier in a Ceriatone 5f6A Bassman
  214. guitar amp ->PA =cabulator
  215. Optocoupler in Fender tremolo
  216. Bugera 1960 infinium Schematic
  217. Epiphone Valve Junior OT upgrade -- help please???
  218. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  219. modifying the Fender Greta line out
  220. Wanna help with basic mods...
  221. B+ voltage drop via Zener/MOSFET question
  222. Minimum output impedance for Marshall Lead 12.
  223. Hammond drawbars - guitar
  224. Peavey Bravo modifications
  225. Hot Rod Deville upgrade
  226. Twin reverb new speakers
  227. 65 Princeton reverb reissue Power transformer pn# 75165 Where can I get one ??
  228. Converting a PCB Champion 600 to a handwired 5F1
  229. Magnatone M13 - Easy Gain Boost
  230. Marshall DSL 100 - Mod to Switchable (50/100 watts)
  231. Fender Hot Rod Deluxe volume pot replacement
  232. Peavey Classic 50 Blue Mods
  233. 12AU7 failed in Orange AD30
  234. Crate gxt-100 is now a BENGL two more related mods needed
  235. Line-In to Active EQ of Fender Super Twin?
  236. Peavey Bandit 65 mods, anyone have any good mods?
  237. Best SGRs?
  238. Fender Greta Tone Control Mod for Music Playing Purposes
  239. Switchable Cathode Bypass Cap help
  240. Adding another tube to a Crate GXT100
  241. 6V6 bias question
  242. Marshall JCM800 4210 Channel Switcher - modification - advice sought.
  243. My amp needs to be louder, said the novice
  244. Marshall Valvestate - Adding Cooling Fan?
  245. Help with Mesa mark V CH2 mod
  246. JCA22H too bright
  247. Crate Gxt-100 looking for any mods
  248. The beauty of a decade box: ab763 tweaks
  249. non-presence 12ax7 phase inverter
  250. bugera 333xl-212 tone stack mod + more