[Collins] Suggestion of best 75A receiver for AM reception

[billriches]

I am fortunate to have an R-725 - the Servo modified R-390A and a 390A in
the same rack and do notice the difference in noisy reception.  725 is
quiet!

(The R-725 was a modified R-390a with an R-390 IF deck. The mech filters
rang and sang and were unusable for diversity direction finding work.  I
believe only about 1000 of the r-725s were built.)

73,

Bill, WA2DVU
Cape May 

-----Original Message-----
From: Collins [mailto:collins-bounces at mailman.qth.net] On Behalf Of Dr.
Gerald N. Johnson
Sent: Monday, July 20, 2015 11:02 AM
To: collins at mailman.qth.net
Subject: Re: [Collins] Suggestion of best 75A receiver for AM reception

I suspect the mechanical filters of that era, like those in the S-line rang
like a bell when hit by lightning static and power line noise. I know the
standard filter in my new 75S-3B did that in 1964. 


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus