Re: [Elecraft] K3s with sub receiver - filter mix and match question
Groping into my blurred memory, I think the benefit of having similar
bandwidth filters (e.g 400hz, 2.7Khz or 2.1 KHz) in the main and sub
receiver is diversity reception but I’m not sure.
"Matched" filters were required for optimal diversity operation
with the *original* synthesizer. With the new synthesizer in
the K3S, that requirement has been relaxed.
Does it matter if I installed either of these single filters on the
> main or sub rx?
No. For example, I have 13 KHz (FM), 2.8, 1.8, 500 (8 pole) and 200 Hz
in my main with 2.8 and 500 (8 pole) in my sub rx. Since I have the
new synthesizer, I can use matched filters for Diversity or select a
tighter filter in the main RX and continue to use a wider view in the
right ear (sub rx). From a DX (split) perspective, I can use a narrow
filter in the main (for the DX) and the wider filter in the Sub RX for
"listening in the pile-up".
If you are one that likes to park the Sub RX on the DX station and
"lock" VFO B, then transmit on VFO A ("split off") and tune around
the pile-up, you may want to put the narrow filters in the Sub RX.
73,
... Joe, W4TV
On 2021-07-05 3:30 PM, PAUL GACEK via Elecraft wrote:
Simple question: Can I mix and match different filters between the main and sub
receiver. If yes, what am I giving up?
Groping into my blurred memory, I think the benefit of having similar bandwidth
filters (e.g 400hz, 2.7Khz or 2.1 KHz) in the main and sub receiver is
diversity reception but I’m not sure.
In my project to install a KRX3/KSYN3A into a K3s, I have a pair of 2.7Khz
filters and a pair of 400Hz filters. Separately, I have a variety of single
filters such as a 250 Hz and 1.8Khz.
Does it matter if I installed either of these single filters on the main or sub
rx?
Paul Gacek
W6PNG/M0SNA
www.nomadic.blog
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Re: [Elecraft] K3s with sub receiver - filter mix and match question
On 7/5/2021 12:30 PM, PAUL GACEK via Elecraft wrote: Simple question: Can I mix and match different filters between the main and sub receiver. If yes, what am I giving up? Groping into my blurred memory, I think the benefit of having similar bandwidth filters (e.g 400hz, 2.7Khz or 2.1 KHz) in the main and sub receiver is diversity reception but I’m not sure. You are correct, it matters for diversity reception. They need to match for bandwidth settings where you want to use diversity. In my rigs, I match the narrow CW filters, because that's where I use diversity. I'm not that serious about SSB. I have the 2.8 kHz (8-pole) filter in the main RX, because it's flatter in the passband than the 2.7 kHz (5-pole) filter. The filter in this position is used as TX sideband filter, and the flatter filter reduces incidental AM when transmitting RTTY. I have a 2.7 kHz filter in the second RX. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3s with sub receiver - filter mix and match question
Simple question: Can I mix and match different filters between the main and sub receiver. If yes, what am I giving up? Groping into my blurred memory, I think the benefit of having similar bandwidth filters (e.g 400hz, 2.7Khz or 2.1 KHz) in the main and sub receiver is diversity reception but I’m not sure. In my project to install a KRX3/KSYN3A into a K3s, I have a pair of 2.7Khz filters and a pair of 400Hz filters. Separately, I have a variety of single filters such as a 250 Hz and 1.8Khz. Does it matter if I installed either of these single filters on the main or sub rx? Paul Gacek W6PNG/M0SNA www.nomadic.blog __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
