[Boatanchors] difference bet. 75A3 and A4?

[Glen Zook]

One thing to consider is that Collins Radio was trying
for "communications quality" audio and NOT high
fidelity audio.  There is a deffinite difference. 
Communications quality audio is going to be frequency
constrained to the passband that allows the best
understanding of voice audio while limiting both the
"highs" and the "lows" which make the voice more
"plesant" to listen to.  Thus, the audio from these
receivers generally is not as plesant to listen to as
those designed for broadcast audio.  But, when there
is QRM, QRN, etc., the voice message is much more
likely to "get through" than with a receiver with a
broadcast quality audio.

As for the 75A2 receivers that were modified to add
the mechanical filters they had the nomenclature tag
changed to 75A2A.

Glen, K9STH

--- "Todd, KA1KAQ" <ka1kaq at gmail.com> wrote:

I probably should have added 'in my opinion' to that
statement because I recall some folks in the past who
think the A-1 sounds awful too. There have been folks
who say the 75A-2 is the 'best' AM receiver of the
A-Line, but I can't confirm this by mine. Maybe they
had the broader versions? I wonder when or even if
they started this narrowing process in the A-2 before
adding the filters and renaming it the A-3?

Glen, K9STH

Web sites

http://home.comcast.net/~k9sth
http://home.comcast.net/~zcomco


	
		
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