[R-390] Z503 Replacement

[Flowertime01 at wmconnect.com]

Don,

I see what you are saying. I know why I have stayed a repairman and never 
went off to be an engineer. 

Design is a science and best practiced by committee. One can do it alone 
but you do get better results from a group activity. I become more 
appreciative of the engineering and design in these R390 receivers every time one of 
these threads materialize. From time to time Fellows say nice things about me. 
I thank them. I think I do not say enough good things about all you 
Fellows. The stuff I have learned just reading the mail over the years is a lot. I 
have to read what is posted. I have to think about it. But knowledge is 
certainly put forward and I try to gain from it. I think the spirit of the R390 
reflector is why this reflector continues as robustly as it does. Sure there 
is a lot of trivia on models, production runs, part numbers. But we open a 
lot of serious engineering design topics. We surly have no idea what those 
engineers were thinking back then. But we look at what was produced and ask 
why, and what can we understand from this or that problem. We post a lot of 
things about a lot of experiments we have performed. That experiment may have 
not been what someone else would do. But things get shared and lot of 
learning takes place. 

Enjoy.

Roger AI4NI

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