hey all, i just got my shipment of fresh NOS tubes from tubestore.com, but i think i might have a prob. after plugging in the JAN GE 5751's, one of the tubes doesnt seem to be glowing orange while the other has a happy orange glow. but, the other one is just sorta sitting there in my demeter preamp. yet i still get a nice tone from my amp, and it doesnt seem to be cutting out, or anything else anomalous in the tone. chuckM??? any ideas?