VK7JB wrote: > > # About filters options: > There was a concensus of opinion that the 2.8 8 pole / 2.7 5 pole swap > wouldn't be of benefit in my situation and that I should just go with the > 2.7 / 5 pole stock filter. > > <SNIP> > I've decided that I probably WILL do the 2.8 for 2.7 swap and install 8 > pole filters from the beginning. One K3 owner pointed out that if I do > that, I won't have to swap out, or worry about matching, the 5 pole > filters in the future if/when I come to install the subreceiver. That > seemed sensible to me, so I'll put in the 8 pole Inrad filters from the > beginning and be done with it. >
One comment on this. Matching the 2.7k filters is not critical at all. For example if they vary by 100 Hz total (which is more than I've seen in building 4 units), you can set the offset to half the difference in each (e.g. one is -0.79 and the other is -0.89, so you set -0.84 for both). With an actual 6 dB bandwidth of about 2800 Hz, you will never notice a 50 Hz offset. 2.7<>2.8k swap fee = $121, plus second 2.8k for $131, results in $252 more expensive versus two stock 2.7k filters at no additional charge. However, as they say "It's your money!" 73, Bill -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-advice-about-options-to-buy-tp5891397p5899769.html Sent from the [K3] mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
