Hi Alan, No more a "dream" for me ! If i dare, you can put me on the list!
73 QRO, Rudolf, HB9ARI PS Excuse me for my bad mood ! I "love" too much MY K3... Alan Bloom wrote: > Yes, the P3 assumes it is connected to the main receiver's IF output, so > if it is actually connected to the sub-RX it would still work but would > not display the correct frequencies and levels. If this becomes popular > enough maybe we should think about adding sub-RX support to P3 firmware. > > Alan N1AL > > > On Tue, 2010-05-25 at 23:50 -0400, Guy Olinger K2AV wrote: > >> Wouldn't there be a K3 interoperating with P3 firmware issue with >> running the P3 on the sub-RX? Just because you could feed a >> **stand-alone** box with a non-company mod for sub-RX IF, does not >> mean the P3 would change the sub-RX with a click on the P3. There is a >> lot of proprietary communication between the K3 and the P3 over the >> serial connection. >> >> Wouldn't a sub-RX feed to a P3 need to be specifically supported by >> Elecraft firmware, both in K3 and P3? Last remarks from them in this >> thread were negative, particularly about isolation at a switch. >> >> That aside, I believe someone using the sub-RX with the TX in split, >> while leaving the main RX to feed the P3, would accomplish the same >> end. This WOULD be a problem on other rigs where the second RX is an >> inferior RX, or not available. In the K3 the sub-RX is a fully equal >> clone of the main RX, making various A/B flippity-do tricks possible >> without sacrificing performance in any way. >> >> 73, Guy. >> >> On Tue, May 25, 2010 at 9:48 PM, Alan Bloom <[email protected]> wrote: >> >>> Hi Rudolf, >>> >>> At the bottom of this message I will copy a posting from W3SZ on the >>> LP-PAN email list that describes how he added IF output to his K3 >>> sub-receiver. He used the Z10000 buffer amp from Clifton Labs: >>> http://www.cliftonlaboratories.com/z10000_buffer_amp.htm >>> >>> If you don't mind modifying your K3, it looks like that should allow you >>> to use the sub-receiver with a P3. When I get time I'll have to try it >>> on my K3 and see how it works. >>> >>> Alan N1AL >>> >>> >>> >>> On Tue, 2010-05-25 at 22:01 +0200, hb9ari wrote: >>> >>>> Hi Rich, >>>> >>>> Very bad news ! >>>> >>>> That was my 1st idea when ordering the P3 >>>> to use it for "wide" span use for phone mode. >>>> (50Mhz in priority during possible "apertures") >>>> For digi mode, as JT65, the ~2kHz width >>>> of "waterfall" is 100% sufficient, because >>>> frequencies are well defined (for ex 14.076Mhz) >>>> I'm quite sure now that it was a bad idea to have ordered >>>> a P3 but, with your accurate explanation, i will >>>> renounce to the sub-receiver ordering (and >>>> roofing filters)! >>>> >>>> I regret that a P3 connection to the sub-rcvr >>>> is not possible, and, as i'm not an RF engineer, >>>> i don't understand the reason(s)! >>>> >>>> At my point of vue, it's not 100% correct to say that >>>> the KRX3 is like a 2nd receiver ! >>>> >>>> Just in time to stop for the KRX3 ordering but for the P3... >>>> may be eBay ? >>>> >>>> My best 73, >>>> Rudolf, HB9ARI >>>> >>> ============================================================ >>> >>> -------- Forwarded Message -------- >>> From: w3sz <[email protected]> >>> Reply-to: [email protected] >>> To: [email protected] >>> Cc: [email protected] >>> Subject: [LP-PAN] KRX3 IF tap up and running >>> Date: Fri, 02 Jan 2009 00:56:35 -0500 >>> >>> Hi Larry, >>> >>> I didn't get a chance to hook up the LP-Pans yet [because the audio >>> cables I need are up at my hilltop QTH], but I did install the KRX3 >>> and its Z10000 buffer amp, and both the main K3 IF output and the KRX3 >>> subreceiver IF output seem to be working fine. I ran the main IF to >>> the main receiver on my Flex5000 and the KRX3 subIF to the subreceiver >>> on the Flex5000. >>> >>> Everything seems to be OK in terms of how I chose to get the IF from the >>> KRX3. >>> >>> I am working a long day tomorrow as well as Saturday AM, but I am >>> hoping to get a chance to run up to the hilltop and pick up the audio >>> cables and then get the LP Pans hooked up Saturday afternoon. >>> >>> This is a brief summary of what I did with the KRX3: >>> >>> I used the Z10000 as buffer amp inside the KRX3. >>> >>> I got +12V from a 12SA pad near to P86A. >>> Power and RF connections to the Z10000 were done from the underside of >>> the Z10000. >>> >>> I took IF output from KRX3 from P86A and used RG174U to take this to >>> input of Z10000. >>> >>> I mounted Z10000 on an unused FL position using a 1/2 inch standoff. >>> >>> I mounted a dual female SMA connector in the REF hole at the bottom >>> corner of the K3 just below the official IF out BNC. I then used a >>> right angle premade small surplus coaxial cable to take the signal to >>> the KRX3 and thus the Z10000. >>> >>> I entered the KRX3 at the back left corner opposite to J92, because >>> there was already an opening there. >>> >>> I ran the coax inside the KRX3 bottom shell, beneath the main KRX3 >>> PCB. I brought it up to the Z10000 by running it through an unused >>> hole meant for an FL standoff. >>> >>> At first check, using the two subreceivers on the Flex5000 to receive >>> the IF signals from the K3, the main K3 and the KRX3 subreceiver IF >>> outputs seem to be equivalent. >>> >>> When constructing the Z10000, I used the -U [Universal] options, not >>> the K2 options. I chose to set it up for zero gain, and thus chose >>> R907 to be 499 ohms, and R905 to be 4.7K, as per section 2.3.3 of the >>> Z10000 manual. >>> >>> I attached a jpg file with the two IFs from the K3 going to the Flex >>> 5000. The K3 main IF goes to the main Flex receiver and the DRX3 sub >>> IF goes to the Flex sub receiver. The signal is Radio Moscow on 40 >>> meters. >>> >>> 73, >>> >>> Roger Rehr >>> W3SZ >>> http://www.nitehawk.com/w3sz >>> >>> >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[email protected] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> >>> > > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
