Oooop's. I saw somewhere about AM band reception. It is the ATU filters.Here is what I was thinking of....
"The KXAT3 antenna wide range tuner plugs into existing connectors inside the KX3. The KXAT3 stores the settings found for the best match at multiple points across each band, allowing for quick frequency and band changes. The KXAT3 also includes an automatically tuned filter for the AM broadcast band that tracks the VFO, improving image rejection for signals in the 0.3-1.0 MHz range." >From the tuner installation manual. Thanks for the clarification thought on the filter. On Sun, Feb 10, 2013 at 7:11 PM, Don Wilhelm <[email protected]> wrote: > Rick, > > The roofing filter option for the KX3 serves an entirely different > function. It reduces the possibility of a strong adjacent channel signal > overloading the KX3 at the product detector stage. > > The filters in the KPA500 (and the K3) that attenuate signals below 1600 > kHz are in the front end (closer to the antenna) so that strong broadcast > signals below 1600 kHz will not overwhelm the T/R switch PIN diodes and > cause them to be ineffective. > > 73, > Don W3FPR > > > On 2/10/2013 6:48 PM, Rick Robinson wrote: > >> Isn't this basically what the Roofing Filter option in the KX3 does. >> Waiting on mine to arrive this Thursday...Rick >> >> On Sun, Feb 10, 2013 at 6:08 PM, Eric Swartz WA6HHQ - Elecraft < >> [email protected]> wrote: >> >> Hi Gary, >>> >>> This is normal as the KPA500 is designed to attenuate signals the further >>> you go below the 160M band in order to protect the T/R switching diodes >>> from BC band overload. >>> >>> 73, >>> >>> Eric WA6HHQ >>> elecraft.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
