Note: when using Mike's software, AUTOINF must be set to NOR. Anyone who normally has AUTOINF=1 (e.g. for a SteppIR antenna) will need to manually reset it before using the software in order to get usable data.
73, ... Joe, W4TV > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jack Smith > Sent: Wednesday, January 14, 2009 2:09 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 Filter Plots > > > I recommend Mike's program to anyone interested in their K3's filter > response. It's relatively simple to use and will give you a > good view of > the first 60 to 70 dB of the filter response. > > For a variety of reasons, measuring the K3's filter skirt > selectivity at > frequencies where the filter's attenuation exceeds 60 or 70 dB using > simple equipment and procedures is difficult. > > Jack K8ZOA > > Verizon Mail wrote: > > Bill W4ZV wrote: > > > >> Someone else asked about the filter plots on the Elecraft > and Inrad > >> websites. I believe all of these were made by George W2VJN before > >> he sold > >> Inrad to N5KO and AG9A. I hope Elecraft or Inrad might > ask George > >> to graph > >> the missing filters (all 5-pole and some 8-pole) eventually > >> (including the > >> yet to be introduced variable bandwidth filters). If > George cannot > >> do it > >> perhaps Jack K8ZOA could do this. > >> > >> 73, Bill W4ZV > >> > >> I asked the question about the filter plots. I have written a > >> program, with Jack's considerable help, that will allow a > K3 to self- > >> characterize it's filters. As each filter is characterized > the data > >> set can be saved by the user and a simple plot drawn by > the program. > >> All the user needs is a stable, clean signal source to > inject into > >> the K3 antenna port. An advantage of this approach over the INRAD/ > >> Elecraft plots is they are generated while the crystal filter is > >> installed in the user's K3, not in a test jig in a laboratory. > >> > > > > The program is called K3 Filter Tools and can be downloaded > free from: http://mysite.verizon.net/ks7d > > > > Mike, KS7D > > _______________________________________________ > > Elecraft mailing list > > Post to: Elecraft@mailman.qth.net > > You must be a subscriber to post to the list. > > Subscriber Info (Addr. Change, sub, unsub etc.): > > http://mailman.qth.net/mailman/listinfo/elecraft > > > > Help: http://mailman.qth.net/subscribers.htm > > Elecraft web page: http://www.elecraft.com > > > > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
