On Mon,1/30/2017 5:21 PM, mtruss wrote:
I have purchased a used K3, serial number 3000 or so, it has been sent back to Elecraft for updates etc and returned to me working great so far. I would like to update some things especially the roofing filters first so the question I would like to ask is Has anybody upgraded from the 2.7 five pole filter to the 2.8 eight pole filter?
I have 2.8 kHz filters in the main receiver in both of my K3s. I like them because they're a bit flatter in the passband, which reduces the incidental AM when I'm transmitting RTTY. The steeper skirts also do a bit better in the presence of strong signals.
I understand the 8 pole is a wider filter with 3 more filtering crystals , does it make any difference in received audio?
Not that you would notice.
also could I use the fm filter for use in the am position.
I'll let Don or Wayne answer that with respect to TX. I don't TX AM, but I sometimes tune down to the AM BC band to verify the directivity of my RX antennas.
73, Jim K9YC ______________________________________________________________ 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 Message delivered to [email protected]
