Hey Mark, I still haven't received those yet? I suspect the USPS system either lost it or the whole Covid excuse thing is really affecting even something as simple as your envelope. Joe sent off a PL400 Light board to me like three weeks ago and it's still not here. USPS hates Tubes. The receiving time is always twice that of boxes and that's on a NORMAL day.. I'm almost jokingly thinking he should put them in the tube and then hide the tube in a BOX. LOL! Maybe they'd treat it differently?
BTW, on this whole Mylar Strip thing.........I WAS WRONG ABOUT BEING WRONG!!
I actually took the time the other day (now that I'm on Vacation) and tore the amp rack down and pulled apart all four of those amps. And what did I find? I did NOT in fact replace the PL700B original strips. I left them as was. So Back to Joes point about LED degradation. Why do I say that? Well I ALSO replaced all four amps light boards with new ones and what do you know? WHITE as day! The Blueish Hue was gone. Now all EIGHT amps look identical. The difference is clear in the before and after below, shot within the same hour. Un-noticeable to the guy with one amp in a rack, but obvious to ME, my Wife, My father, and my two Brothers. We all can't be that color blind.
Now this answered what did I do with the Mylar strips that Doug (Fitz43) sent me all that time ago? I believe I used them on that PL700B that Jerry got from me. I knew I had used them SOMEwhere. I just couldn't remember where. I'm a pretty detail oriented guy so when I see something off, I usually know why right away WHY. My time messing with these amps has been so far and few between as of the last 5 years, that without opening them up; I just couldn't tell you what I did to which amp. The only clear consensus in this household was the fact I replaced those light boards all at the same time 5 years ago. So now; problem solved.