[R-390] R-390A Cost Reduction and Improvements (was dead horse Hi)

[Llgpt1@aol.com]

In a message dated 6/10/2003 8:26:45 PM Central Daylight Time, 
cfandt@netsync.net writes:

> Whoa Joe! Now that is a message of interest to me and perhaps others! This 
> deserves trashing the old Subject: title and creating a new one so the 
> Archives will be searchable for any constructive responses.
> 
> Anybody responding please setup some sort of subject title that you feel is 
> fitting. Someday most of the mechanical filters may not be found at a 
> civilized price or be available at all.
> 
> Thanks for bringing this up Joe.
> 
> Regards,  Chris
> 
> NNNN
> 
> Upon the date 15:24 10-06-03 -0700, Joe Foley said something like:
> 
> >Has anyone ever tried to brew up a coil/capacitor
> >replacement for the mechanical filters?
> >
> >
> >Joe
> 
> 
> 
> Christian Fandt,      Electronic/Electrical Historian
> Jamestown, NY  USA    cfandt@netsync.net
>      Member of Antique Wireless Association
>      URL: http://www.antiquewireless.org/ 
> 
> _______________________________________________
> 

Well, we could use the Kiwa filters which have better shape factors and the 
prices are not bad. They have better audio qualities and are compatible with 
any receiver with a 455 kc if. At present, I use a Kiwa Map Unit with 6 cascaded 
filters resulting in bandwidths of 2.9 and 6.8 with shape factors of 1.32 and 
1.62 respectively. 

I realize that many of us won't want to change the filters and want to 
continue to use mechanical filters. Then, use the Rockwell/Collins torsional 
mechanical filters, beware though, they are expensive.

Ya pays yer money and ya takes yer choices....................


Les Locklear
Gulfport, Ms.


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