"John Plimmer" wrote (in part):

snip
That's very strange indeed, as the 7030+ has the highest blocking specs
of
any hobby receiver and higher than some very expensive professional
receivers.
snip

I had the good fortune to have a 7030+ to play with for a couple of
weeks.
I would sell kidney or other spare body part tonight to buy one.
However I live less then 4 miles from a littlel 1KW MW on 770.
And we a few fairly local power houses at 590 and 630 and 1300.
On the 7030+ I could receive the 770+590 fairly strong the , the
770+630
and and the 770+1300 very strong. In a nearby park about twice as far
from the 770 station as my home, I get no mix products. The 770 is so
strong that it will show up in most receivers even with the antenna
disconnected and replaced with a 50 ohm terminator. By most receivers
I mean R390, R392, R5000, R2000 DX389(3.5mm plug inserted),
the 7030+ and every automotive radio I have ever tested. I suspect
that
the 770KHz is so strong is just causes the front end to "colapse".
It is funny that my PRC1000 requires at least a paper clip to receive
it.

I can receive them on a simple crustal set with just the leads to the
earphones.

I am very glad they are only 1KW and daytime only!

Terry