Mercury Epiphone Valve Junior - Final Wiring Steps (Without 6 V6 Mod); Critical Next Step Warning

Epiphone Valve Jr.•Mercury Upgrade Kit 23
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.
FINAL WIRING (without 6v6 Mod)
1. Threadthevarioustransformerleadsthrough
theholesasindicatedinthediagrams.
2. Soldertheorangelamentleadsfromthe
PTintopositionsattheV2tubesocket.Note
thattheseleadsmustbetightlytwisted(see
appendix).
3. SolderontoT1andT2theredleadsfromthe
PT.
4. SoldertheblackandyellowPTleadsontothe
On/Offswitch.
5. Soldertheorange/white-stripedcentertap
leadfromthePTandthegroundchassis
leadtothebackoftheboard(seespecial
instructionpage).
6. Solderthegreenandblacksecondaryleads
fromtheOTtothespeakerjackasindicated.
7. SoldertheblackprimaryOTleadtoT4.
8. SoldertheyellowprimaryOTleadtoT3.
9. SoldertheMini-Choke’sleadstothelocations
designedontheMainPCB.
10. BolttheMainPCBbackintothechassis.
11. Connecttheinputjackandvolumecontrol
leadstotheirjacksontheMainPCB.
Triple-checkyourmodications.Ifyouhaveany
questionsthetimetogetthemansweredisnow.
CallMercuryifyouareindoubtaboutanything.
Finishre-assemblingtheunit,includingreinstalling
thetubes,puttingthechassisbackinthecase,
hookingupthespeaker,etc.
DO NOT BYPASS THIS NEXT STEP!
Aftertriple-checkingyourassembly,connectthe
amp’spowertoaVariac and amp meter,oreven
better,avariableACpowersupply,andfollow
thetesting/start-upproceedureasoutlinedinthis
manual’sappendix.
Debugifnecessaryandrepeatthisprocess
untilyouaresatisedthattheUpgradedampis
workingcorrectly.
Whentheampisworkingtoyoursatisfactionuse
thecableties(supplied)togroupandholdthe
variouswiresawayfromtheMainPCB(especially
thetubes).Inparticular,gatherupFilament
SupplyLeadstyingthemasclosetothepower
transformeraspossible.Seenalphotographsfor
examples.
ApplyLoctite 290(green)tothetworetainingbolts
andscrewsoftheMainPCB.
ApplytheMercurymetalplacetoproperlyI.D.
yourMercury Upgraded amp.Andyouaredone!