[R-390] Filters

[Bob Camp]

Hi

So the driver coil as loaded into the filter has a Q of about 33. If the coil is mainly limited by it's resistance, that would give an unloaded Q of 60 for the coil alone. That's a pretty reasonable number for a simple multilayer solenoid coil.

Bob
 
On Feb 16, 2013, at 10:18 PM, John Kolb <jlkolb at jlkolb.cts.com> wrote:

> 
> I've placed the Collins factory specification for the F455N-20 filter
> on my web site.
> http://www.jlkolb.cts.com/site/curves/F455N-20_DataSheet.pdf
> 
> Please ignore the filters for sale list - no filters for sale
> at the moment.
> 
> John
> KK6IL
> 
> At 03:28 PM 2/16/2013, Charles P. Steinmetz wrote:
> 
> For those who haven't seen it, John has a lot of good information about mechanical filters on his web site:
> 
> http://jlkolb.cts.com/
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html