Dan Walker
CVRS Member

Thanks for the compliments. Yes those tuning eyes are supposed to be bright. many times you can buy them on ebay and the seller
says they test good and that may be true but after time the phosphorus is not bright. The tube still works as it should but the brightness is gone.
The cost of these tubes has gone up in recent years and if you can get a NOS tube you will probably find that it is much brighter. Dan