Re: [Elecraft] K4HD switchable?
Thanks Wayne. 73, Andy, k3wyc From: Wayne Burdick Sent: Thursday, May 23, 2019 10:55 AM To: Andy Durbin Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K4HD switchable? > "> Can the superhet option be switched in/out independently for each of the > K4D receivers? > > In theory." > > Why is this theoretical? Figure of speech. The hardware will do this, but we haven’t provided a way to do it yet in software. Easy enough. > My understanding of the superhet spec is that it would be limited to about > 2.8 kHz bandwidth. Spec is being updated. There will be a spare (3rd) filter slot for each receiver that can accommodate a wider bandwidth filter, such as 6 or 12.5 kHz. Or a narrower one if that better fits your needs. Wayne __ 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
Re: [Elecraft] K4HD switchable?
> "> Can the superhet option be switched in/out independently for each of the > K4D receivers? > > In theory." > > Why is this theoretical? Figure of speech. The hardware will do this, but we haven’t provided a way to do it yet in software. Easy enough. > My understanding of the superhet spec is that it would be limited to about > 2.8 kHz bandwidth. Spec is being updated. There will be a spare (3rd) filter slot for each receiver that can accommodate a wider bandwidth filter, such as 6 or 12.5 kHz. Or a narrower one if that better fits your needs. Wayne __ 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
[Elecraft] K4HD switchable?
"> Can the superhet option be switched in/out independently for each of the K4D receivers? In theory." Why is this theoretical? My interest in the question is for use with WSJT-X modes where I currently use a 4 kHz - 5 kHz RX bandwidth. My understanding of the superhet spec is that it would be limited to about 2.8 kHz bandwidth. What is the max bandwidth of the superhet module and, if limited to 2.8 kHz, can it be switch out of circuit? Thanks and 73, Andy k3wyc __ 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
Re: [Elecraft] K4HD switchable?
Nice! Thanks! Jim ab3cv On May 23, 2019, at 12:17 PM, Wayne Burdick wrote: > On May 23, 2019, at 8:24 AM, Jim Miller wrote: > > Can the superhet option be switched in/out independently for each of the K4D > receivers? In theory. > > For example it might be nice to run a full band skimmer on one receiver (so > no superhet) while still needing the strong signal performance on another > receiver (with superhet). Even when the superhet module is in use, the panadapter(s) will still be in direct-sampling mode. The resulting I/Q stream could be used for this purpose. Wayne N6KR __ 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
Re: [Elecraft] K4HD switchable?
> On May 23, 2019, at 8:24 AM, Jim Miller wrote: > > Can the superhet option be switched in/out independently for each of the K4D > receivers? In theory. > > For example it might be nice to run a full band skimmer on one receiver (so > no superhet) while still needing the strong signal performance on another > receiver (with superhet). Even when the superhet module is in use, the panadapter(s) will still be in direct-sampling mode. The resulting I/Q stream could be used for this purpose. Wayne N6KR __ 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
[Elecraft] K4HD switchable?
Can the superhet option be switched in/out independently for each of the K4D receivers? For example it might be nice to run a full band skimmer on one receiver (so no superhet) while still needing the strong signal performance on another receiver (with superhet). Jim ab3cv __ 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
