[R-390] Collins Mechanical Filter History

[Llgpt at aol.com]

Well Bill,
 
I care about accuracy. Not so much about the numbers, but the statement  that 
the R-390 had mechanical filters. Part of the dumbing down of America if  you 
ask me. Broad statements meant to be all inclusive, etc. I believe in being  
more accurate and doing research before speaking out or writing about  
something.
 
Yep, pretty soon I'll be history to, but history should be truthful and  
accurate right? You might disagree, but wrong and mistruths aren't accurate  
history...........
 
Les Locklear
Monitoring since ' 57
Located on the Gulf of  Mexico
Bendix R-1015B/URR
Hallicrafters SX-62A
Hammarlund R-274C/FRR  (SP-600JX-14)
Ten Tec RX-340
RF Systems MLB - MK2  
Quantum QX  Loop
CU-2279/BRC  Multicoupler
http://www.hammarlund.info/homepage.html







In a message dated 6/3/2005 12:16:45 PM Central Daylight Time,  
levyfiles at att.net writes:

More  than 65,000 includes more than 70,000.
Who really cares?

Why get so  uptight about how much more or where more starts from. more is  
more.
sort of like just short of infinity more.

Its a story  about mechanical filters. they were simply stating that lots 
were made and  they know how to make lots more and if you need any please 
write  them.

Art is Dead, the Company is different now, thats all history.  Pretty soon 
all of us will be history too.

BFD

73,  Bill


----- Original Message ----- 
From:  <Llgpt at aol.com>
To: <w5or at comcast.net>;  <R-390 at mailman.qth.net>
Sent: Friday, June 03, 2005 1:06  PM
Subject: Re: [R-390] Collins Mechanical Filter  History



This was cut n' pasted from their page:

The  highest volume application of mechanical filters in those days was in
the  R-390. Each radio used four mechanical filters. Originally designed  at
Rockwell Collins in 1955, the R-390 was later built by many different  
companies,
mostly as the R-390A. The total production volume of R-390As  was more than
65,000 radios.

It certainly doesn't demonstrate "why"  the "generic term" R-390 is used.
Their information isn't anywhere close to  being accurate regarding the 
numbers
built unless they are inlcuding  the R-390 in with the R-390A. 65,000??? I 
don't
think so! But, if you  include the R-390's and R-390A's, it comes to more
than  70,000+ radio  receivers. So much for "historical accuracy."

Ahhhh,  engineers................., reminds me of the saying an old engineer
friend  of mine told me:

"Having a college degree and legitimate parents  doesn't mean you can't  be a
dumb bastard."


In a message  dated 6/3/2005 11:51:24 AM Central Daylight Time,
w5or at comcast.net  writes:

Interesting info from Rockwell.  Some of the details don't  jive  with our
lore.  Also demonstrates why using the generic  term, "R-390",  is endemic to
our list culture, and   necessary.

<http://www.rockwellcollins.com/about/additionalproducts/collinsfilters/page
1907.html>

If   the link above is truncated in your email program, go   to
www.collins-filters.com

Click the About Collins Filters   link
See the History section.


Hello to all the guys I met  for  the first time at Dayton.  I still haven't
unpacked, nor  looked at all  my  notes.

Don