View attachment 25778
Some nice close up shots, looks like a conversion of tracer to trader.
http://www.williammaloney.com/Aviation/QuonsetAirMuseum/GrummanC1ATrader/index.htm
Another nice shot
http://www.flickr.com/photos/95172890@N00/3943276360/
A Jamming EC1A Trader?
http://www.modellversium.de/kit/bilder/5/0/6/506-deckel.jpg
Apologies if some of the info is duplicated on previous posts
The aircraft in your first link is a one of a kind areodynamic test aircraft for the E-1. It never did have a radome installed as the wings still folded up over the fusrlage. The shot of the inboard flap is noteworthy as it is common to this a/c and the E-1 only.