Hi Guver; and others.
Well; I brought my problem(s) to my LHS; one of the employee's Ray; is quite knowlegeable with respect to electronic issues.
We discovered that it is indeed the positive teminal connection on the female connector that is the problem.
It is Ray's belief that I used too low a wattage soldering iron when I made the connections.
He stated that it appears that I held the heat on the spade for too long a time.
Although this was required to get a good solder joint; it allowed the heat to build up in the body of connector which allowed the connectors to move out of proper alignment.
I bought a bag of Deans female connectors and replaced the three that were causing the problem. As an aside, I was just about ready to change all the Dean's connectors on my equipment to Servoss connectors.
This time I used a 100/150 watt soldering gun. Originally, I used a 50 watt soldering iron (because I didn't want to overheat the connectors! [:-]
The connections on all three batteries appear to be fine now, as I cannot duplicate the intermittent connection problem that I was having.
For both usal767 & LSF2298; yes these are genuine "Dean's" connectors; I purchased them from my LHS, who stands by what he sells.
Ray; stated that could see some movement of the positive blade within the connector housing. Alas, my aging eyes could not perceive any movement, so I took his word that the movement was there, and the careful replacement of the female connectors seems to have corrected the problem.
Thank you again for you interest and responses! All I can say is be very careful when making the solder connections.
It appears that you must use a gun/iron of at least 100 watts, be sure to pre-tin both the leads and the terminals, apply heat only long enough to get the solder to flow, and remove the heat as quick as possible.
I guess its like anything else, one must learn the proper technique as it applies to the project at hand. You must use enough heat to insure a good solder connection, but not so much heat that terminal can move.
I live in Connecticut and its snowing again

Well, I guess that why we call it building time.
Happy flying all; and watch those solder connections!
Al