[R-390] [!! SPAM] Filters

[KR4HV]

Collins has an economy line of filters.  I bought two last year for a Racal
455 if from Collins direct with my credit card at $100each.  They work
great.

Has anyone spoken with a Collins engineer about a product(s) or if they
could reasonably retro and existing product line to work?

They are available for phone calls.  I spoke with one of their engineers
about what I was doing at the time.

Just a thought.

Walt


Rockwell Collins Filter Products


Rockwell Collins Filter Products specializes in designing mechanical filters
to meet your unique and evolving requirements. We produce two different
types of mechanical filters. For frequencies between 100 kHz and 700 kHz, we
create filters made from rods resonating in a torsion mode. For frequencies
below 100 kHz, we use flexure mode bar resonators. Our filters can achieve
bandwidths from 0.05 to 5 percent. Whatever your filter needs are, Filter
Products can customize designs to meet them.

      
Key Contacts

14192 Franklin Ave.
Tustin, CA 92780 
Phone: (714) 929-3971
Fax: (714) 929-4011
Email


Application Notes

View Application Notes


Torsional Mechanical Filters

View a partial listing of torsional mechanical filter specifications 


Low Cost Series

A Low Cost Series of torsional mechanical filters has been designed for use
in 455 kHz IF circuits. Excellent quality and reliability at a low cost. 

Part # 3 dB BW (typ.) 
526-8733-010 300 Hz 
526-8693-010 500 Hz 
526-8694-010 2.5 kHz 
526-8695-010 5.8 kHz 
526-8734-010 7.0 kHz 
562-8735-010 10.0 kHz 





Navtex Filters

Rockwell Collins builds Navtex filters at three frequencies: 
424 kHz, 490 kHz and 518 kHz. 

Part # Frequency  Poles 
526-8707-010  424 kHz 6 
526-8708-030 518 kHz 6 
526-8749-010 490 kHz 6 
526-8771-010 490 kHz 4 
526-8772-010 518 kHz 4 





-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Jim Haynes
Sent: Friday, February 15, 2013 9:18 PM
To: r-390 at mailman.qth.net
Subject: [!! SPAM] [R-390] Filters

Rockwell-Collins still makes mechanical filters, but it's my understanding
they use a different principle from the older ones, and also that the
interface requirements are different.

I see by a web page that they make a low-cost series for use in 455 KHz IF
circuits, with bandwidths of 300, 500, 2500, 5800, 7000 and 10000 Hz.
Naturally they don't say what "low" means in cost.

jhhaynes at earthlink dot net
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