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  1. Bassman AA568 unused triode applications
  2. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  3. Log/ Lin Bass Pot (DlxRev).
  4. EL34 in a Champ?
  5. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  6. 6150+ Mods and a real engineer guitarist!
  7. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  8. Thank you Valvewizard - Ground, hum blocking
  9. Replacement speakers poll
  10. Bias points
  11. 5150 bias mod
  12. Fender Pro Jr More Bass
  13. Trying New Speakers/replacements
  14. Marshall Amp increase Bass/low-mid response
  15. Can y'all help me with a minor mod to a Peavey Rage 158?
  16. Relay wiring for Vox Night Train mod
  17. Adding additional input output to Line6 spider ii amp
  18. Suggestion for moderator - let's spell "Tweeks" correctly!
  19. Looking for more gain mod schematic jcm800 2210
  20. Negative feedback loop mod for Pro Reverb
  21. Using Combo amp Speaker as Cab
  22. Marshall JVM
  23. Are SoZo blue caps the same as Fender blue caps?
  24. Line out help please
  25. I want to reduce the gain in my Peavey Rage 158.
  26. help with some peavey XXX mods
  27. Simplest way to turn a combo amp into both a head and a cab as well?
  28. Amp Mod for some More Gain?
  29. Bogen PA head for guitar? Help with pentode preamp stages.
  30. Another JTM60 1x12 thread/question... (haven't seen this one)
  31. Fender Blues Jnr Mk3 Mod
  32. What's this JCM800 mod do?
  33. What's this JCM800 mod do?
  34. Supro Inspired VVR Question
  35. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  36. Adding tube spring reverb to a Mesa Boogie SOB
  37. 5V4 instead of 5Y3 ?
  38. Bypass Digital Board in Super Champ XD (& possibly others)
  39. Epiphone valve standard to increase the treble
  40. Different Speaker Outputs On Marshall DSL 40C
  41. Help needed to upgrade Capacitors in a Marshall DSL 40C
  42. coupling cap to block some bass?
  43. Hicks mender
  44. 2015 VOX Ac30c2 service manual
  45. Drop preamp voltage
  46. Fun new zener tweak!
  47. Convert 5F6A Bassman into 5F8A Twin
  48. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  49. Newest Peavey Classic 30 - Blue Guitar Mods?
  50. Cathode bypass gain boost questions
  51. converting 6sc7 amp to use 6sl7
  52. 6CA7 tubes something different in the place of EL34 ??
  53. Remove ground lift network? JCM900 dual reverb
  54. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  55. JCM900 4500 Mod: C27 Jumper or...
  56. cathodyne/LTP switch (for small P-P amp)
  57. Replacing my tone control with an Orange-style shape control
  58. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  59. Fender Twin bias dilema
  60. Fender Ultralinear - KT66, 77 or KT88?
  61. Improved circuit for power tube tremolo in a fixed-bias amp
  62. Bias test points for PCB amp
  63. Fender Frontman 65R volume mod
  64. Peavey Classic VTX 65 watt combo question for Enzo
  65. Eyelet boarding a reissue amp (Fender)
  66. Which switch for high voltage switching?
  67. Carvin Belair - moding one channel
  68. Sound differences from different dual op amps in SS amps
  69. De-biasing a Peavey Classic VT (6L6 output stage)
  70. Tonestack help
  71. add an attenuator to an existing tweeter?
  72. mesa mk IV bias
  73. Conversion to acoustic amp
  74. Taming Fender Blues Deluxe Abrupt Volume Control
  75. Switchable VTM 60/120
  76. SF Twin reverb Ultra linear transformer Blackfacing
  77. Age Old Problem of TOOO Bright Super Reverb
  78. Deeper voicing on EVH5150iii
  79. Different types of power resistors
  80. What cap value for this idea?
  81. Mesa Nomad 55 Reduce the gain
  82. Vox Escort Mains/Battery amp power upgrade?
  83. Possible wrong installation of diodes in place of a 6X4
  84. Taming a Gibson tone stack
  85. "Tighter" Bass on a Tone King.
  86. Peavey xxx upgrades
  87. Cable runs and effect on tone
  88. Help with mod to Crate FW65 Combo
  89. Mesa .50cal EL84 version bias pot mod
  90. Switch ratings for mods with high voltage
  91. Musicman 75 head 2100EX too much overdrive
  92. Marshall DSL mod
  93. Any ideas for a temperature controlled fan for Bass amp
  94. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  95. Slitting speaker cone or knitting needle ? Kinks content
  96. Vox lead escort 50 - integrating valve stage
  97. LTPI on a 6G2?
  98. Adding a footswitch to a Blackstar HT-1
  99. Fender Deluxe 112 Plus Too LOUD
  100. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  101. Built-in solid state reverb circuit for tube amp homebrew...
  102. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  103. Silverfacing a Deluxe Reverb
  104. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  105. ROLAND BOLT 30- 60 cycle hum...
  106. Fender Bassman AA864 variant - mods
  107. Peavey 6505+ 112 mod for channel balance
  108. Peavey Valveking Modifications
  109. tightening up BF Princeton reverb ?
  110. Best way to increase bass response...
  111. E-Wave DG2-30RH head Clean channel too bright
  112. ENGL E320 clean vol mod
  113. Trem and Bias
  114. marshall 1987x hiss reduction possible?
  115. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  116. I wish to modify the tone stack in my Ashdown Mag 300 head.
  117. Using 12AT7 instead of 12AX7
  118. Subbing 12AU7 for 12AX7
  119. Any thoughts on how to "soften" attack on a Fender Bassman ?
  120. Fender Blues Junior excessive treble
  121. Looking for less low-cut in Randall RVC (like RD5C)
  122. Marshall JCM 900 mod
  123. Modding reverb
  124. Marshall Split channel again (some interesting information)
  125. Changing rectifier in a Ceriatone 5f6A Bassman
  126. guitar amp ->PA =cabulator
  127. Optocoupler in Fender tremolo
  128. Bugera 1960 infinium Schematic
  129. Epiphone Valve Junior OT upgrade -- help please???
  130. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  131. modifying the Fender Greta line out
  132. Wanna help with basic mods...
  133. B+ voltage drop via Zener/MOSFET question
  134. Minimum output impedance for Marshall Lead 12.
  135. Hammond drawbars - guitar
  136. Peavey Bravo modifications
  137. Hot Rod Deville upgrade
  138. Twin reverb new speakers
  139. 65 Princeton reverb reissue Power transformer pn# 75165 Where can I get one ??
  140. Converting a PCB Champion 600 to a handwired 5F1
  141. Magnatone M13 - Easy Gain Boost
  142. Marshall DSL 100 - Mod to Switchable (50/100 watts)
  143. Fender Hot Rod Deluxe volume pot replacement
  144. Peavey Classic 50 Blue Mods
  145. 12AU7 failed in Orange AD30
  146. Crate gxt-100 is now a BENGL two more related mods needed
  147. Line-In to Active EQ of Fender Super Twin?
  148. Peavey Bandit 65 mods, anyone have any good mods?
  149. Best SGRs?
  150. Fender Greta Tone Control Mod for Music Playing Purposes
  151. Switchable Cathode Bypass Cap help
  152. Adding another tube to a Crate GXT100
  153. 6V6 bias question
  154. Marshall JCM800 4210 Channel Switcher - modification - advice sought.
  155. My amp needs to be louder, said the novice
  156. Marshall Valvestate - Adding Cooling Fan?
  157. Help with Mesa mark V CH2 mod
  158. JCA22H too bright
  159. Crate Gxt-100 looking for any mods
  160. The beauty of a decade box: ab763 tweaks
  161. non-presence 12ax7 phase inverter
  162. bugera 333xl-212 tone stack mod + more
  163. Silverface to Blackface
  164. Rivera S120 Mods - Please Help!
  165. Orange tiny Terror fx loop mod ?
  166. Help on DIY F2B with mods
  167. Changing Plate resistor question.
  168. Compilation of BF Reverb Fender Mods
  169. Guild Thunderbass 50Watt power supply issues
  170. Dual independent bias for a Windsor
  171. Amp Maker SE5 extra gain stage
  172. large PI tail resistor
  173. Bucking Transformer Built In to Chassis
  174. Univox U45b Tremolo
  175. Jcm 2210 mod help
  176. VHT Special 6 Ultra Mods
  177. Mod/Tweak VHT Special 6 Combo
  178. CRATE VC-3112 4xEL84 to 2xEL84 mod?
  179. "Fender" remote reverb control Badabing ka-pow!
  180. A couple questions about Peavey Butcher mods (should also apply to VTM)
  181. 5F1 Champ Mods - component ratings?
  182. 68 Princeton Reverb Bias Mod Question
  183. Moving clean ch. Tonestack on a 2210. Good idea?
  184. Can I add a Piezo tweeter to Peavey KB100?
  185. L-pad question
  186. Blackstar HT-1 - Add reverb?
  187. Useful Matchless Cluman mods?
  188. Line 100v amp conversion ?
  189. Add choke to blues junior (mexico)
  190. Music Man RD50 112 6l6 to 6v6
  191. LOW Gain !
  192. Looking for Bright options...
  193. DSL 401 mods
  194. prosonic combo weak reverb
  195. Marshall AVT50 cd input too loud
  196. Princeton 112 Plus - Shutdown MOD
  197. Fender Bassman output waveform oscillations
  198. PPIMV in SF Twin 135
  199. Uberschall channel balance
  200. Modifying Princeton 112 plus - Make Dirty Channel Versatile Clean Channel
  201. Fender princeton 112 solid state too loud!!
  202. Converting AA371 Basssman to best sounding circuit for guitar- which one ?
  203. Bugera v22 mod questions from a beginner
  204. Mustang III
  205. Connect a combo amp to a 4x12 cab.. Can it be done?
  206. need to add an Fx loop to valve amp ?
  207. Mesa boogie Nomad 100 new speaker reqd
  208. Marshall 1987X. customer says too loud
  209. Help me please
  210. Anyone know where to get the Fender silverface push/pull master volume pots?
  211. What Have I Done??? Orange Rocker 30 OT Swap
  212. Adding Midrange control to this tone circuit
  213. Effects loop wont work ?????
  214. I know, Valvestate 150 mod to make clean channel worth using?
  215. FX Loop problems
  216. Univox U200B
  217. El 84 fixed bias amp & Paul Ruby zener mod.
  218. Fender Blues jnr Too much treble
  219. Switching jack needed?
  220. Marshall JCM 800 2204 FX loop advice
  221. Question about gain staging
  222. tube saving power up tweaks?
  223. Mark Moyer mods to "Custom" Vibrolux Reverb
  224. Adding a choke to Ampeg V-4 power supply?
  225. Using Kalamazoo Model One as a preamp.
  226. Older Traynor YCV40 Master Mod.....again
  227. triode/pentode high/low power switch
  228. Peavey Classic 30 Cathode Bias / Half wattage mod
  229. BF Fender VibroVerb and Deluxe Reverb double note intermod at 15 Fret
  230. Lowering the Voltage on Traynor YBA-1
  231. 1996 Marshall 1959SLP Reissue
  232. Volume pots with power switches
  233. Factory bulletins on the Fender Princeton 112+? Nope but here are some mods I did
  234. Mods for Fender Champion 30
  235. EL84 NFB
  236. HRD Fromel Mod
  237. Dana Hall's VVR Install: Marshall 50 watt Plexi 1987x
  238. 1968 Bandmaster TFL5005 amp cabinet swap
  239. 5e3 Internal jumpering on an on/off switch
  240. Fender Hot Rod Deville 410
  241. Tone control lift for an 18 watter
  242. adding tweeter to 2x10 bass cabinet
  243. boosting highs/ adding presence control?
  244. fender bright swith help
  245. 5F2-A Build - Help with -NFB and Pull Switch
  246. Marshall 18 watt TMB mods?
  247. Super Champ XD harsh treble--any popular mods?
  248. Vox Lil Night Train Fizzy Overdrive
  249. Fender Dual Showman Tremolo clicking and speed issues
  250. Too Much Compression - Heavy Squish - Parallel 12ay7 Tweed Style