Mercury Epiphone Valve Junior - Tips for Reducing RF and Circuit Noise; Tips for Drilling the 6 v6 Mod Tube Socket

42 Epiphone Valve Jr.•Mercury Upgrade Kit
ThisprojectanditsdocumentationistheresultoftechnicalinvestigationsmadebytheengineeringstaffofMercury Magnetics.Thedisclosureoftheinformationhereinmaypertaintoproprietaryrightsand
thefurnishingofthesedocumentsdoesnotconstituteanexpresedorimpliedlicensetousesuchmaterials.
Tips ’n Tricks for
Reducing RF & Other Noise in the Circuit
AlittlenessingisneededtoreduceRFandothernoise.AcorrectlysetupMercury UpgradedValve
Jr.shouldbealmoststone-quiet.Ifyoualreadyhaveaquietamp,yourdone!Ifnot,readon.
Here’safewnoise-reducingrecommendations:
1. Withtheamppowered-up,turnitsvolumecontroloffandunlplugtheguitar.
2. Listen.Doyouhearanunusualamountofextranoise?
3. Thekeytoreducingnoiseisthelayoutofthewiring.Lookingatthesuppliedphotosofanishedamp,
you’llnoticepatternsastohowthelamentleadsandotherleadsaretwistedtogether.Howsomeare
nottwisted.Theirlengths.Theuseofwireties,andthepositionsofothers.
4. Thelmamentwiresshouldbeasevenlytwistedaspossible—about10twistsperinch.Symetryis
important.
5. Trytofollowourexamplesascloselyaspossible.
6. Theoutput transformer’sprimaryYELLOWleadisanothersourceofnoise.Keepitunderandaway
fromasmanycomponentsandotherleadsaspossible,butclosetothechassis.
7. MakesurethatthetwinREDB+leadsfromthePTareNOTTWISTEDtogether.
Tips ’n Tricks for
Drilling the Tube Socket for the 6v6 Mod
Tocreatetheproper-sizedholeforthe6V6tubesocket,you’llneedvaribitorsteppeddrillbitssimilartothese.