Mercury Epiphone Valve Junior - Page 36

36 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.
STEP B:Turnontheamp’spower.
STEP C:Whilewatchingthecurrent
(amp)meter,slowlyrollontheVariac’s
outputvoltageknob.Theampshouldturn
onatabout45volts.
Whenyougettoabout60voltsyoudon’t
wanttoseemorethanafewhundred
milliamps.Ifthecurrentmeterreaches
anywhereabovehalfanamp,rollthe
Variacbacktozero,shuteverything
down,dischargethecaps,andlook
fortheerror,shortorbadcomponent.
Correcttheproblemandrepeatuntilthis
testpasses.
STEP D:Onceyoucanreach120volts
drawinglessthanhalfanamp,youarein
goodshape.
NOTE:Ifyoudon’thaveacurrentmeter
onyourVariac,removethefusefromthe
amp,andwithanampmeteracrossthe
emptyfuseholdersocket,turnonthe
ampandperformthetestabove.