I just acquired this preamp, every-time I power-up the unit the small tubes momentarily glows bright. Is it normal or is it a defect?
Thanks PDVD.
fyi, the national brand 12ax7 from deeco is like that...
hehehe, typical newbie concern...
meron pa ngang ayaw maniwala na sinabi kong normal lang yan,
nag-post pa sa youtube ng video at sa diyaudio....
lahat naman ng sumagot nagsabing okey lang....
pero hindi pa rin, pinilit akong palitan nang ibang tube,
kahit used na basta hindi ganoon...