> Are those filters I've listed above all I can fit in the K3's > main receiver? I think I read that it had 5 filter slots. I'm > not sure if the KBF3 fills one of these slots. If not, should > I consider an alternative additional filter?
The KBF3 General Coverage RX Filter Module is not a first IF filter - it is a front end bandpass filter module - and does not use one of the five "filter slots." If you are planning to use the 12 KHz filter for AM, I do not know that also need the 6 KHz filter unless you are planning for ESSB use in the future. > 2. Can users distinguish the difference between the 2.7KHz 5 > pole filter and the 2.8KHz 8 pole filter when using the K3? I > understand the skirts of the 8 pole filter's passband will be > steeper but is this noticeable? Yes, when the band is crowded and you have very strong signals +/- 1.5 KHz or more. However, for 90%+ of CW and digital (RTTY) operation you will not notice the narrower first IF filter. The 500 Hz 5-pole filter is a suitable alternate to the 400 Hz 8-pole at a slightly lower cost. My K3 has the FM, 2.8 KHz, 500 and 200 Hz filters. I see no need for the 6 KHz filter and rarely use the 200 Hz filter (but I expect to use it on 80/160 in the contests). I can't see a need for any of the other filters but I'm keeping my options open with regard to a 1.5 or 1.8 KHz narrow SSB filter (or the variable width filters if/when they are available). 73, ... Joe, W4TV > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Shane White > Sent: Wednesday, June 25, 2008 9:06 AM > To: [email protected] > Subject: [Elecraft] K3: Choosing which filters to buy > > > > 1. I plan to configure my K3 with the following filters - > > Stock 2.7KHz > KBF3 General Coverage RX Filter Module > AM 6KHz > FM 12KHz > CW 400Hz 8 pole (uncertain about this filter) > > Not having much CW experience and my current radio only using > a 2.7KHz wide filter for CW (Rx only), I'm not sure which > narrow filter to equip the K3 with. What's recommended for > someone who will only use CW intermittently and not for > contesting? (General purpose use I suppose). It's worth > mentioning that I'm yet to learn morse but certainly > appreciate it's worth and plan to use it. > > Are those filters I've listed above all I can fit in the K3's > main receiver? I think I read that it had 5 filter slots. I'm > not sure if the KBF3 fills one of these slots. If not, should > I consider an alternative additional filter? > > 2. Can users distinguish the difference between the 2.7KHz 5 > pole filter and the 2.8KHz 8 pole filter when using the K3? I > understand the skirts of the 8 pole filter's passband will be > steeper but is this noticeable? > > Thanks, > Shane > VK5ABQ > -- > View this message in context: > http://www.nabble.com/K3%3A-Choosing-which-filters-to-buy-tp18 111978p18111978.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [email protected] 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: [email protected] 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
