Sleepysurf,
The hum is most likely coming from one of the components you have connected to the CT-5 and not the preamp itself. Something you can try is to disconnect everything connected to the preamp (not the amp, naturally). Then connect each component one at a time until you get the hum. Put the cheater plug on the offending component. If you're against using cheater plugs on source components, then you'll have to look elsewhere for a solution.
Good luck.
The hum is most likely coming from one of the components you have connected to the CT-5 and not the preamp itself. Something you can try is to disconnect everything connected to the preamp (not the amp, naturally). Then connect each component one at a time until you get the hum. Put the cheater plug on the offending component. If you're against using cheater plugs on source components, then you'll have to look elsewhere for a solution.
Good luck.