Believe it or not, most of my noise problem was attributed to a faulty guitar cable.  I purchased a new cable and the amp quieted down considerably.  Did also swap the V1 and V2 tubes and that also helped.  Life is good!!  Thanks for the compliment on the build it's my first but not last.  Can't wait to build another plexi with an fx loop and master volume.  Thanks for your help.

Thanks for replying.  Yes I built it myself.  I'll try swaping the v1 and v2 tubes first and let you know what happens.

I just finished building a plexi 100 and the sound is incredible.

How much hiss should be coming from the amp.  I have no hum but the hiss level increases as the volume goes to 10.

Just wondering what's normal.