[OFARC] Filter project

Ralph ke5hdf at sbcglobal.net
Sat Aug 5 16:29:50 EDT 2017


so far I have received 4 replies to my "survey" about doing the band 
pass filter project

Add me to that list and we have 5 votes ...

Of those:

     3 wanted to build filters for themselves

     1 only wanted to build a set for the club

     4 wanted to learn more about filters (but only 2 admitted it)


of the 4 wanting to build filters:

     1 mentioned 20m as primary and 40m as secondary

     1 stated 40m as primary and 20m as secondary

     1 stated 40m as primary and 80m as secondary

     1 stated no preference  (the club normally uses a 20m and 40m 
filter at field day, but could use others as well)


Since we are currently in a low of the current solar cycle (and it will 
continue for 2-3 more years),  20M. 40M, and 80m filters would be the 
most useful for now.

The only parts we need to order are the capacitors.

A preliminary check of parts at www.mouser.com for the 20m and 40m 
filters, _for each filter_ ....capacitors will run $10-20 (plus 
shipping), with other parts about $15 ....so approximately $40 after 
shipping.

I will confirm part numbers and cost for all the filters and provide a 
tighter estimate as soon as I can.

At the next club meeting, we can discuss how to proceed with the project 
....
     explain filter function and design at a meeting
     show & tell some filters at a club meeting, describe how to construct
     ??????  club order and build OR each person order and build, then 
we test them all at a club meeting?????


Ralph   KE5HDF


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