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  1. Adding spring reverb to a practice amp board already printed for spring reverb?
  2. Mackie Power supply
  3. Metal film cap sizes.
  4. b-52 at112 60 mod for el 34's
  5. Marshall dsl 401 volume OD2 mod.
  6. Tremolo intensity on Univox U42/45
  7. A Cleaner Clean Channel
  8. Mooer Elec Lady Flanger - Volume Drop Mod
  9. Reducing Voltage On Laney Supergroup 60 Watt
  10. Looking for the dookie mod
  11. Sano 50 WRT - convert 8417 to 6550 or 6L6
  12. Can I "Raw Control" or Tone Stack bypass pot?
  13. How to test output transformer performance for overperforming amp
  14. Mads Vox ac30c2
  15. 12AY7 PI tube, good, bad or ugly? Your thoughts please.
  16. 5f1 champ w/electronic reverb
  17. reducing reverb effect in deluxe reverb aa763 circuit?
  18. Champ 600 EQ mod balls-up!
  19. More Thomas Vox repair manuals
  20. Negative feedback, and resonance question?
  21. BF Princeton Reverb - wider range for treble pot
  22. Schematic question?
  23. Preamp stage help please.
  24. Modding gain stage on amp
  25. How does this look for a boosted up reverb unit circuit?
  26. Peavey Delta Blues Distorted
  27. Teach me a little something about NFB in a Deluxe Reverb
  28. 65 ReIssue Super Reverb Midrange Pot change
  29. Tweed Deluxe Coupling Cap Changes
  30. Suggested Mods for Peavey Butcher - Negative Feedback Loop Tone control?
  31. Adjustable bias and measuring points Valve King 112
  32. Peavey Artist VT resonance & presence mods
  33. Marshall JTM 60 choke mod
  34. Peavey Valveking Pre PI Master Volume mod Thoughts?
  35. THD picovalve
  36. Marshall dsl 15 h mod help
  37. Watkins Dominator extra stage?
  38. Power supply filtering
  39. Understanding/improving JTM60 FX LOOP
  40. 5E3 cascading inputs MAD FEEDBACK! Need fix
  41. Replace 2 x12" speakers with 1x 15", possible? Worth it?
  42. adding DC heaters to a high gain 100 watt amp
  43. ValveKing 100 mod questions
  44. Orange Dark Terror. Mod for more resonance.?
  45. Elevated AC heaters?
  46. Mods for a B-52 ST100A (can get one dirt cheap)
  47. Hum/Noise vs shielded cable or twisted wires in a Peavey Triumph 60
  48. A bit confused about V1 and V2 in my Mesa F-50
  49. LED activation from 5v winding?
  50. advice on more bass and treble from "Micro Champ"
  51. effects loop idea
  52. question about mods to valve amps
  53. Inexpensive L-Pads...
  54. Change led color and some mod to footswitch
  55. Hammond / Everett AO-50 conversion to Vox AC15
  56. Mesa Boogie F-50.. what is this?
  57. Question about using relays for foot s/w
  58. Bugera V22 Infinium CHOKE mod
  59. Opinions on a relay activated volume boost
  60. Bright Switch/Cap Wiring
  61. would a Master Volume solve my issue?
  62. MOSFET PI, how to Bias?
  63. Fender M80 Overdrive Channel
  64. Ampeg Ba 210 SP High EQ mod?
  65. Can't Turn Volume Completely Off
  66. Solder Both Sides of PCB?
  67. Adding gain stage to Marshall 2203; handling the 10k cold clipped stage
  68. Adding an on/off reverb switch to vintage amp
  69. Fender Twin Reverb
  70. DSL 100: Changing Grid Blockers and Bias Resistors
  71. Mesa Boogie SPAX7 in a Peavey Valve King Head.
  72. Effects loop on a AC15CHWX
  73. New AB763 Blackface Mods Page (includes DRRI & 68 CDR)
  74. Ampeg B-15 Preamp...
  75. Modding Boost Switch on Bugera V22
  76. 65 Blackface Fender Showman PPIMV
  77. Peavey Valve King 112 Dynamics/Attack/Gain fuzz MOD
  78. Final tweaking of a 1959SLP Re-issue..
  79. JTM60/JCM600 important MODS
  80. Adding a choke to Sovtek Mig 60
  81. I wish I had one of these years ago - '71 Traynor YBA-1 gets Plexi modded ** CLIP **
  82. Peavey Triumph 60 Hum
  83. Fender Frontman Mod.
  84. Removing power valves to reduce output
  85. Fender Reverb Mods
  86. Vox DA5 lineout modification - speaker bypass
  87. Princeton 112 Plus - 50k 15A Volume Pot Mod - Part Number And Source Needed, Please
  88. Possible to add NFB to this schematic?
  89. lower wattage in 5E7A tweed pro?
  90. Peavey Classic 50 Blue Guitar Mods
  91. I think it's attenuater time
  92. Pushing V2 harder within older fenders. Pre-amp clipping mod?
  93. Bassman AA568 unused triode applications
  94. Super Reverb '65 RI - Changing Output Transformer to Match Speaker Load
  95. Log/ Lin Bass Pot (DlxRev).
  96. EL34 in a Champ?
  97. Blackstar Artisan 100 circuit PPIMV and FX Loop Mods
  98. 6150+ Mods and a real engineer guitarist!
  99. Adding Filament Transformer to Sovtek Mig-50. How to place it?
  100. Thank you Valvewizard - Ground, hum blocking
  101. Replacement speakers poll
  102. Bias points
  103. 5150 bias mod
  104. Fender Pro Jr More Bass
  105. Trying New Speakers/replacements
  106. Marshall Amp increase Bass/low-mid response
  107. Can y'all help me with a minor mod to a Peavey Rage 158?
  108. Relay wiring for Vox Night Train mod
  109. Adding additional input output to Line6 spider ii amp
  110. Suggestion for moderator - let's spell "Tweeks" correctly!
  111. Looking for more gain mod schematic jcm800 2210
  112. Negative feedback loop mod for Pro Reverb
  113. Using Combo amp Speaker as Cab
  114. Marshall JVM
  115. Are SoZo blue caps the same as Fender blue caps?
  116. Line out help please
  117. I want to reduce the gain in my Peavey Rage 158.
  118. help with some peavey XXX mods
  119. Simplest way to turn a combo amp into both a head and a cab as well?
  120. Amp Mod for some More Gain?
  121. Bogen PA head for guitar? Help with pentode preamp stages.
  122. Another JTM60 1x12 thread/question... (haven't seen this one)
  123. Fender Blues Jnr Mk3 Mod
  124. What's this JCM800 mod do?
  125. What's this JCM800 mod do?
  126. Supro Inspired VVR Question
  127. MASSIVE improvement to Mesa Boogie SOB mod - How to add a real presence control
  128. Adding tube spring reverb to a Mesa Boogie SOB
  129. 5V4 instead of 5Y3 ?
  130. Bypass Digital Board in Super Champ XD (& possibly others)
  131. Epiphone valve standard to increase the treble
  132. Different Speaker Outputs On Marshall DSL 40C
  133. Help needed to upgrade Capacitors in a Marshall DSL 40C
  134. coupling cap to block some bass?
  135. Hicks mender
  136. 2015 VOX Ac30c2 service manual
  137. Drop preamp voltage
  138. Fun new zener tweak!
  139. Convert 5F6A Bassman into 5F8A Twin
  140. Blues Jr, any mods or advice available to convert tube mount pcb to hard wired?
  141. Newest Peavey Classic 30 - Blue Guitar Mods?
  142. Cathode bypass gain boost questions
  143. converting 6sc7 amp to use 6sl7
  144. 6CA7 tubes something different in the place of EL34 ??
  145. Remove ground lift network? JCM900 dual reverb
  146. Gallien Krueger MB150S-III adding Boost circuit ala GK MB150E-III
  147. JCM900 4500 Mod: C27 Jumper or...
  148. cathodyne/LTP switch (for small P-P amp)
  149. Replacing my tone control with an Orange-style shape control
  150. Project! Convert push/pull 'boost pot' to a footswitchable jack?
  151. Fender Twin bias dilema
  152. Fender Ultralinear - KT66, 77 or KT88?
  153. Improved circuit for power tube tremolo in a fixed-bias amp
  154. Bias test points for PCB amp
  155. Fender Frontman 65R volume mod
  156. Peavey Classic VTX 65 watt combo question for Enzo
  157. Eyelet boarding a reissue amp (Fender)
  158. Which switch for high voltage switching?
  159. Carvin Belair - moding one channel
  160. Sound differences from different dual op amps in SS amps
  161. De-biasing a Peavey Classic VT (6L6 output stage)
  162. Tonestack help
  163. add an attenuator to an existing tweeter?
  164. mesa mk IV bias
  165. Conversion to acoustic amp
  166. Taming Fender Blues Deluxe Abrupt Volume Control
  167. Switchable VTM 60/120
  168. SF Twin reverb Ultra linear transformer Blackfacing
  169. Age Old Problem of TOOO Bright Super Reverb
  170. Deeper voicing on EVH5150iii
  171. Different types of power resistors
  172. What cap value for this idea?
  173. Mesa Nomad 55 Reduce the gain
  174. Vox Escort Mains/Battery amp power upgrade?
  175. Possible wrong installation of diodes in place of a 6X4
  176. Taming a Gibson tone stack
  177. "Tighter" Bass on a Tone King.
  178. Peavey xxx upgrades
  179. Cable runs and effect on tone
  180. Help with mod to Crate FW65 Combo
  181. Mesa .50cal EL84 version bias pot mod
  182. Switch ratings for mods with high voltage
  183. Musicman 75 head 2100EX too much overdrive
  184. Marshall DSL mod
  185. Any ideas for a temperature controlled fan for Bass amp
  186. Traynor YBA-3 dummy load to use 8 ohm cabinet?
  187. Slitting speaker cone or knitting needle ? Kinks content
  188. Vox lead escort 50 - integrating valve stage
  189. LTPI on a 6G2?
  190. Adding a footswitch to a Blackstar HT-1
  191. Fender Deluxe 112 Plus Too LOUD
  192. JCM 2000 Marshall TSL 100 mod to DSL 100 Specs
  193. Built-in solid state reverb circuit for tube amp homebrew...
  194. Reduce treble in Fender Frontman 212r clean channel with circuit mod
  195. Silverfacing a Deluxe Reverb
  196. Crate Vintage Club 30 /50 Remove V1 from the dirt channel to reduce gain
  197. ROLAND BOLT 30- 60 cycle hum...
  198. Fender Bassman AA864 variant - mods
  199. Peavey 6505+ 112 mod for channel balance
  200. Peavey Valveking Modifications
  201. tightening up BF Princeton reverb ?
  202. Best way to increase bass response...
  203. E-Wave DG2-30RH head Clean channel too bright
  204. ENGL E320 clean vol mod
  205. Trem and Bias
  206. marshall 1987x hiss reduction possible?
  207. Slope resistor and cap changes when changing a CF side to a 12ay7/12au7
  208. I wish to modify the tone stack in my Ashdown Mag 300 head.
  209. Using 12AT7 instead of 12AX7
  210. Subbing 12AU7 for 12AX7
  211. Any thoughts on how to "soften" attack on a Fender Bassman ?
  212. Fender Blues Junior excessive treble
  213. Looking for less low-cut in Randall RVC (like RD5C)
  214. Marshall JCM 900 mod
  215. Modding reverb
  216. Marshall Split channel again (some interesting information)
  217. Changing rectifier in a Ceriatone 5f6A Bassman
  218. guitar amp ->PA =cabulator
  219. Optocoupler in Fender tremolo
  220. Bugera 1960 infinium Schematic
  221. Epiphone Valve Junior OT upgrade -- help please???
  222. Hall Amplification VVR3 in Selmer Treble & Bass 50 Mk3
  223. modifying the Fender Greta line out
  224. Wanna help with basic mods...
  225. B+ voltage drop via Zener/MOSFET question
  226. Minimum output impedance for Marshall Lead 12.
  227. Hammond drawbars - guitar
  228. Peavey Bravo modifications
  229. Hot Rod Deville upgrade
  230. Twin reverb new speakers
  231. 65 Princeton reverb reissue Power transformer pn# 75165 Where can I get one ??
  232. Converting a PCB Champion 600 to a handwired 5F1
  233. Magnatone M13 - Easy Gain Boost
  234. Marshall DSL 100 - Mod to Switchable (50/100 watts)
  235. Fender Hot Rod Deluxe volume pot replacement
  236. Peavey Classic 50 Blue Mods
  237. 12AU7 failed in Orange AD30
  238. Crate gxt-100 is now a BENGL two more related mods needed
  239. Line-In to Active EQ of Fender Super Twin?
  240. Peavey Bandit 65 mods, anyone have any good mods?
  241. Best SGRs?
  242. Fender Greta Tone Control Mod for Music Playing Purposes
  243. Switchable Cathode Bypass Cap help
  244. Adding another tube to a Crate GXT100
  245. 6V6 bias question
  246. Marshall JCM800 4210 Channel Switcher - modification - advice sought.
  247. My amp needs to be louder, said the novice
  248. Marshall Valvestate - Adding Cooling Fan?
  249. Help with Mesa mark V CH2 mod
  250. JCA22H too bright