Topband: mfj-731 tunable rf filter

[john]

k8bot , a friend of mine and I both are attempting to get opinions on 
how good/effective mfj731 is.
Jim lives within a 1000 of a am broadcast station and I live within 3/4 
mile of another am broadcast
station--
I have the older mfj 259 and jim has the newest version,,, when trying 
to check 160,80, and 40,and  these stations,
when on, renders the analyzers useless(but interesting).
any input would be appreciated
thanks
73
john w8wej