[Elecraft] k3 filters and kx3

2011-12-14 Thread Adi Andrei
Can the K3 roofing filters be used in KX3 ? Adi 2E0TTX On 12/12/2011 21:22, Jim Miller wrote: Poor choice of words: first I fell into the balun habit rather than CM choke on the first usage. Second: bifilar wound CM choke would have been a better description for the alternative mentioned.

Re: [Elecraft] k3 filters and kx3

2011-12-14 Thread Bruce Beford
No, the KX3 roofing filter module is completely different. It works at baseband frequencies, rather than the 8+ MHz IF that the K3 uses. You will not be able to use K3 filters in the KX3. Bruce, N1RX Can the K3 roofing filters be used in KX3 ? Adi 2E0TTX

Re: [Elecraft] k3 filters and kx3

2011-12-14 Thread Terry Posey
The Elecraft KX3 architects should weigh in on this topic - a simplified block diagram would be helpful. The KX3 roofing filter is likely a analogue filter realized with precision op amps and operating at the KX3 low-frequency IF (11 KHz?) - not baseband. The roofing filter is applied prior to

[Elecraft] k3 filters and kx3

2011-12-14 Thread Bruce Beford
Technically true, Terry. I perhaps oversimplified my response to the inquiry. Baseband can mean different things to different people. However, the answer to the question remains correct. - No, you cannot use the K3 filters in the KX3. I will leave further amplification to Wayne or Eric. 73,

Re: [Elecraft] k3 filters and kx3

2011-12-14 Thread Edward R. Cole
order. Just waiting to hear the opening bugle! the horses are at the starting gate. 73, Ed - KL7UW -- Message: 38 Date: Wed, 14 Dec 2011 08:51:15 -0500 From: Terry Posey tpo...@nettally.com Subject: Re: [Elecraft] k3 filters and kx3 To: 'Bruce Beford' bruce.bef