[TenTec] Why is the Jupiter better?

[Grant Youngman]

> R390A, Drake R-4C etc, etc. and of course Orion

Unfortunately, the R-4C as it came from Drake was not a very good 
receiver in almost every measure we now consider important.  
Downright awful actually.

Which isn't to say that I don't love mine dearly.  It is what it is :-)

Some info here (also on the Orion, so it is certainly relevant):
http://www.w8ji.com/receiver%20IM3%20sorted.htm

Grant/NQ5T