RE: [Elecraft] 2nd RX and roofing filters (sought of)
Toby, Transmit filtering is accomplished in DSP and with the crystal IF roofing filters ON THE MAIN RX board. If you have the subreceiver option installed, all you have to do is select VFO B to use it. The RX filters on the sub RX board will then come into play, but you must remember that only the filters on the main RX board will be used for transmit. VFO B tuning will be done with the smaller knob. If you want to tune with the large tuning knob, you can use the A<>B button. But if you do, the filters on the main RX will be in play. Hope this helps! 73 Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Toby Deinhardt Sent: Monday, May 07, 2007 3:31 PM To: elecraft@mailman.qth.net Subject: [Elecraft] 2nd RX and roofing filters (sought of) Hi, I hope I am not over looking anything the FAQ or the stream of mails during the last several days. If not, this might be something for the FAQ. If I have understood correctly, the filters which one wants to use for TX must be in the standard receiver and not in the KRX3 . In my case that would mean that the FM bandwidth filter will end up in the primary rx. I have also ordered the 6kHz filter, mainly for SWLing. As far as other filters are concerned, I have not made any final decision yet. One idea that I have, is to set up one receiver as a general purpose RX and trim the other RX for good contest performance. Assuming, just for the sake of argument (without caring about how sense this combination of filters actually makes), that the filters are set up like this: standard RX | KRX3 +-- FM | 2700 Hz | 2100 Hz 6000 Hz | 1800 Hz 2700 Hz | 500 Hz 500 Hz | 250 Hz Will it be possible to have the KRX3 act as the primary RX during contests while using the standard RX as the secondary, and vice versa when not contesting? Among other things, I assume, this would mean the tuning for the KRX3 and TX would be on the "big knob" and the tuning for the secondary (standard) RX would be on the "small knob". If so, would this entail any limitations and will this be transparent for the OP (important after 30 or more hours of no sleep)? vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? (< #200) DOK C12, BCC, DL-QRP-AG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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: Elecraft@mailman.qth.net 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
Re: [Elecraft] 2nd RX and roofing filters (sought of)
Hi Greg & Lyle, Does this mean that one can not reconfigure the radio so that either RX is considered to be the main RX? In other words, one can not directly tune the KRX3 using the large knob? It would be nice if one choose (independent of the logical VFOs A & B) which RX is tuned by which knob. Obvisiously, if the KRX3 is being used as the "main" RX, then the VFO of the standard RX/TX would have switch frequencies between RX and TX very quickly, assuming that it is tuned to a different RX frequency. Possible? Not possible? vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? (< #200) DOK C12, BCC, DL-QRP-AG - Original Message - From: "Greg" <[EMAIL PROTECTED]> To: "Toby Deinhardt" <[EMAIL PROTECTED]>; Cc: "Lyle Johnson" <[EMAIL PROTECTED]> Sent: Tuesday, May 08, 2007 6:11 AM Subject: RE: [Elecraft] 2nd RX and roofing filters (sought of) Toby, Transmit filtering is accomplished in DSP and with the crystal IF roofing filters ON THE MAIN RX board. If you have the subreceiver option installed, all you have to do is select VFO B to use it. The RX filters on the sub RX board will then come into play, but you must remember that only the filters on the main RX board will be used for transmit. VFO B tuning will be done with the smaller knob. If you want to tune with the large tuning knob, you can use the A<>B button. But if you do, the filters on the main RX will be in play. Hope this helps! 73 Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Toby Deinhardt Sent: Monday, May 07, 2007 3:31 PM To: elecraft@mailman.qth.net Subject: [Elecraft] 2nd RX and roofing filters (sought of) Hi, I hope I am not over looking anything the FAQ or the stream of mails during the last several days. If not, this might be something for the FAQ. If I have understood correctly, the filters which one wants to use for TX must be in the standard receiver and not in the KRX3 . In my case that would mean that the FM bandwidth filter will end up in the primary rx. I have also ordered the 6kHz filter, mainly for SWLing. As far as other filters are concerned, I have not made any final decision yet. One idea that I have, is to set up one receiver as a general purpose RX and trim the other RX for good contest performance. Assuming, just for the sake of argument (without caring about how sense this combination of filters actually makes), that the filters are set up like this: standard RX | KRX3 +-- FM | 2700 Hz | 2100 Hz 6000 Hz | 1800 Hz 2700 Hz | 500 Hz 500 Hz | 250 Hz Will it be possible to have the KRX3 act as the primary RX during contests while using the standard RX as the secondary, and vice versa when not contesting? Among other things, I assume, this would mean the tuning for the KRX3 and TX would be on the "big knob" and the tuning for the secondary (standard) RX would be on the "small knob". If so, would this entail any limitations and will this be transparent for the OP (important after 30 or more hours of no sleep)? vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
Re: [Elecraft] 2nd RX and roofing filters (sought of)
Oh boy never write an e-mail before awaking fully... sorry Hi Greg & Lyle, Does this mean that one can not reconfigure the radio so that either RX is considered to be the main RX? In other words, one can not directly tune the KRX3 using the large knob? It would be nice if one could choose (independent of the logical VFOs A & B) which RX is tuned by which knob. Obvisiously, if the KRX3 is being used as the "main" RX, then the VFO of the standard RX/TX would have to switch frequencies, between RX and TX, very quickly, assuming that it is tuned to a different RX frequency. Possible? Not possible? vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? (< #200) DOK C12, BCC, DL-QRP-AG - Original Message - From: "Greg" <[EMAIL PROTECTED]> To: "Toby Deinhardt" <[EMAIL PROTECTED]>; Cc: "Lyle Johnson" <[EMAIL PROTECTED]> Sent: Tuesday, May 08, 2007 6:11 AM Subject: RE: [Elecraft] 2nd RX and roofing filters (sought of) Toby, Transmit filtering is accomplished in DSP and with the crystal IF roofing filters ON THE MAIN RX board. If you have the subreceiver option installed, all you have to do is select VFO B to use it. The RX filters on the sub RX board will then come into play, but you must remember that only the filters on the main RX board will be used for transmit. VFO B tuning will be done with the smaller knob. If you want to tune with the large tuning knob, you can use the A<>B button. But if you do, the filters on the main RX will be in play. Hope this helps! 73 Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Toby Deinhardt Sent: Monday, May 07, 2007 3:31 PM To: elecraft@mailman.qth.net Subject: [Elecraft] 2nd RX and roofing filters (sought of) Hi, I hope I am not over looking anything the FAQ or the stream of mails during the last several days. If not, this might be something for the FAQ. If I have understood correctly, the filters which one wants to use for TX must be in the standard receiver and not in the KRX3 . In my case that would mean that the FM bandwidth filter will end up in the primary rx. I have also ordered the 6kHz filter, mainly for SWLing. As far as other filters are concerned, I have not made any final decision yet. One idea that I have, is to set up one receiver as a general purpose RX and trim the other RX for good contest performance. Assuming, just for the sake of argument (without caring about how sense this combination of filters actually makes), that the filters are set up like this: standard RX | KRX3 +-- FM | 2700 Hz | 2100 Hz 6000 Hz | 1800 Hz 2700 Hz | 500 Hz 500 Hz | 250 Hz Will it be possible to have the KRX3 act as the primary RX during contests while using the standard RX as the secondary, and vice versa when not contesting? Among other things, I assume, this would mean the tuning for the KRX3 and TX would be on the "big knob" and the tuning for the secondary (standard) RX would be on the "small knob". If so, would this entail any limitations and will this be transparent for the OP (important after 30 or more hours of no sleep)? vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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 __ NOD32 2248 (20070507) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
