The unit has been off for two days(no lights on front panel) and the tubes are still glowing. I'll have to contact my local dealer for possible repair.
Dave Belles is in NY and has a phone number.If you search the internet you will find a lot of information on your preamp.It may be normal for your preamp to have a reduced filament voltage when it is plugged in. Dave will be able to tell you if there is a problem.
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