softrock with K3
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Any one have any experience with the softrock and the K3
I just ordered the softrock for K3 and would like some opinions and experiences with this setup. What is the good software for use with the K3? Thanks on line like everyone else...... George NE2I _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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And I assume that we'd need a crystal of two or four times the K3's
IF, depending on the softrock model, to use it with the K3. Any word on a source for such crystals? Dave W5DHM On Dec 23, 2007 12:24 PM, George Cortez Jr <[hidden email]> wrote: > Any one have any experience with the softrock and the K3 > I just ordered the softrock for K3 and would like some > opinions and experiences with this setup. > What is the good software for use with the K3? > > Thanks > on line like everyone else...... > > George NE2I _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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Why buy a new xtal when you can get a Softrock 40 with the correct xtal for
only $11.00? http://www.softrockradio.org/node/49 John [K7SVV] ----- Original Message ----- From: "Dave Martin" <[hidden email]> To: "George Cortez Jr" <[hidden email]> Cc: <[hidden email]> Sent: Sunday, December 23, 2007 11:55 AM Subject: Re: [Elecraft] softrock with K3 > And I assume that we'd need a crystal of two or four times the K3's > IF, depending on the softrock model, to use it with the K3. Any word > on a source for such crystals? > > Dave W5DHM > > > On Dec 23, 2007 12:24 PM, George Cortez Jr <[hidden email]> wrote: >> Any one have any experience with the softrock and the K3 >> I just ordered the softrock for K3 and would like some >> opinions and experiences with this setup. >> What is the good software for use with the K3? >> >> Thanks >> on line like everyone else...... >> >> George NE2I > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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 > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.516 / Virus Database: 269.17.6/1193 - Release Date: > 12/22/2007 2:02 PM > > _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by George Cortez Jr
Hi Dave.
There is a Softrock kit specific for the K3 which includes a xtal at 32.7680Mhz, approx 4 times the K3 IF. The Kit is not expensive around $15 US. I have one here but with so many jobs I have not yet the time to get it up and running. Regards Rowland G4APO _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by k7svv
Oh, very good. Thanks. I'll save my old softrock for forty meters.
On Dec 23, 2007 2:11 PM, John [K7SVV] <[hidden email]> wrote: > Why buy a new xtal when you can get a Softrock 40 with the correct xtal for > only $11.00? > http://www.softrockradio.org/node/49 > > John [K7SVV] > > > ----- Original Message ----- > From: "Dave Martin" <[hidden email]> > To: "George Cortez Jr" <[hidden email]> > Cc: <[hidden email]> > Sent: Sunday, December 23, 2007 11:55 AM > Subject: Re: [Elecraft] softrock with K3 > > > > And I assume that we'd need a crystal of two or four times the K3's > > IF, depending on the softrock model, to use it with the K3. Any word > > on a source for such crystals? > > > > Dave W5DHM > > > > > > On Dec 23, 2007 12:24 PM, George Cortez Jr <[hidden email]> wrote: > >> Any one have any experience with the softrock and the K3 > >> I just ordered the softrock for K3 and would like some > >> opinions and experiences with this setup. > >> What is the good software for use with the K3? > >> > >> Thanks > >> on line like everyone else...... > >> > >> George NE2I > > _______________________________________________ > > Elecraft mailing list > > Post to: [hidden email] > > 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 > > > > > > -- > > No virus found in this incoming message. > > Checked by AVG Free Edition. > > Version: 7.5.516 / Virus Database: 269.17.6/1193 - Release Date: > > 12/22/2007 2:02 PM > > > > > > Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by George Cortez Jr
> Any one have any experience with the softrock and the K3...
PLEASE remember that you *must* have a high-reverse isolation buffer between the K3 IF OUT jack and the Softrock antenna input. The Softrock may have a huge spur at its carrier frequency and its mixer may not suppress this adequately. So there is a potential coupling problem (mixer) and radiation problem (shielding). The IF out of the K3 does not have high reverse isolation characteristics, so you need to ensure you do not couple a signal at the IF *into* the K3 through this connector. 73, Lyle KK7P _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Dave Martin-2
Dave and all,
Tony Parks KB9YIG has a Softrock kit for the K3 IF the crystal is 32.768 MHz - just send Tony $11 (or whatever the latest price is) and you can have one too. Tony's email is [hidden email]. He does accept PayPal or checks or money orders. I have not built mine yet, so I cannot make any comments. The softrock that I currently have attached to the IF of my Icom PCR100 is working fine - it adds CW and SSB capability to the PCR-100. You will have to join the Yahoo Sotfrock40 group to download the documentation and you can join in on the discussion. 73, Don W3FPR Dave Martin wrote: > And I assume that we'd need a crystal of two or four times the K3's > IF, depending on the softrock model, to use it with the K3. Any word > on a source for such crystals? > > Dave W5DHM > > > On Dec 23, 2007 12:24 PM, George Cortez Jr <[hidden email]> wrote: > >> Any one have any experience with the softrock and the K3 >> I just ordered the softrock for K3 and would like some >> opinions and experiences with this setup. >> What is the good software for use with the K3? >> >> Thanks >> on line like everyone else...... >> >> George NE2I >> > > Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by KK7P
Any recommendations for a "high-reverse isolation buffer" circuit?
Jerry W4UK At 02:19 PM 12/23/2007, Lyle Johnson wrote: >PLEASE remember that you *must* have a high-reverse isolation buffer >between the K3 IF OUT jack and the Softrock antenna input. The >Softrock may have a huge spur at its carrier frequency and its mixer >may not suppress this adequately. So there is a potential coupling >problem (mixer) and radiation problem (shielding). The IF out of >the K3 does not have high reverse isolation characteristics, so you >need to ensure you do not couple a signal at the IF *into* the K3 >through this connector. > >73, > >Lyle KK7P _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by KK7P
We'll have to get some ideas for a simple buffer that will provide
good isolation. Otherwise before long questions will be popping up about spurious responses and noise with our new K3s. On Dec 23, 2007 2:19 PM, Lyle Johnson <[hidden email]> wrote: > > Any one have any experience with the softrock and the K3... > > PLEASE remember that you *must* have a high-reverse isolation buffer > between the K3 IF OUT jack and the Softrock antenna input. The Softrock > may have a huge spur at its carrier frequency and its mixer may not > suppress this adequately. So there is a potential coupling problem > (mixer) and radiation problem (shielding). The IF out of the K3 does > not have high reverse isolation characteristics, so you need to ensure > you do not couple a signal at the IF *into* the K3 through this connector. > > 73, > > Lyle KK7P > > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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: [hidden email] 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 |
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In reply to this post by Jerry Flanders
> Any recommendations for a "high-reverse isolation buffer" circuit?
No. I just want people to be aware that the I.F OUT jack is exactly that: and I.F. *OUT* jack. All bets are off if you inject a signal into this connector. Keep in mind that the Softrock is a $12-class receiver, not a $500 class one, so you cannot assume that it has much L.O. suppression at its antenna jack. People get so excited by the concept of a cheap receiver for their PC, and by the "software defined" mantra, that they overlook the fact that $12 hardware is, after all, $12 hardware. It *admirably* serves its purpose of introducing people to what can be done with DSP, and Tony and associates have done a wonderful thing to make this available to the Amateur radio community. But adding a spectrum monitor to the K3 is a systems design exercise, and you need to be aware of the limitations of the system components, including the I.F. OUT jack of the K3 :-) I suggest a careful, thoughtful reading of Larry's notes < URL:http://www.telepostinc.com/K3pan.html > as he approaches the addition of a panadapter to his K3. There are a number of issues which he addresses. 73, Lyle kK7P _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Dave Martin-2
Dave,
"simple" and "effective" are often antonyms and do not occur together except in the most simple cases. Assuring that no signals are inadvertently injected into the K3 IF OUT jack does not sound like a simple case. Bite the bullet and do a good job of isolating no matter what you use - the performance of your K3 depends on it. Directly connecting an $11 piece of equipment to a $1000 piece of equipment and expecting no adverse consequences is a lot to be expected. It *can* be done - the devil is in the details. 73, Don W3FPR Dave Martin wrote: > We'll have to get some ideas for a simple buffer that will provide > good isolation. Otherwise before long questions will be popping up > about spurious responses and noise with our new K3s. > > > On Dec 23, 2007 2:19 PM, Lyle Johnson <[hidden email]> wrote: > >>> Any one have any experience with the softrock and the K3... >>> >> PLEASE remember that you *must* have a high-reverse isolation buffer >> between the K3 IF OUT jack and the Softrock antenna input. The Softrock >> may have a huge spur at its carrier frequency and its mixer may not >> suppress this adequately. So there is a potential coupling problem >> (mixer) and radiation problem (shielding). The IF out of the K3 does >> not have high reverse isolation characteristics, so you need to ensure >> you do not couple a signal at the IF *into* the K3 through this connector. >> >> 73, >> >> Lyle KK7P >> >> >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> 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: [hidden email] > 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: [hidden email] 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 |
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Lyle, perhaps you have actually hooked up the softrock "panadaptor"
and found a problem. If so, let us know. Otherwise, considering that the K3 is using a roofing filter which should be VERY effective in eliminating any feedthrough from the softrock's actual LO freq, until somebody actually hooks one up to the K3 and finds a problem, I continue to hope that no isolation is required, or that a simple attenuation pad can do the job without excessive attenuation of the display sigs. With the standard K3 softrock panadaptor kit that KB9YIG provides, the LO is at 8.191 kHz and K3 IF is at 8.215, 24 KHz away. The roofing filters should provide pretty good attenuation at that "distance". Some phase noise will be present at 8.215, but it may or may not be negligible. I will definitely use the panadaptor with the K3 I have on order, and already have the softrock kit awaiting the build. Jerry W4UK At 04:51 PM 12/23/2007, Don Wilhelm wrote: >Dave, > >"simple" and "effective" are often antonyms and do not occur >together except in the most simple cases. Assuring that no signals >are inadvertently injected into the K3 IF OUT jack does not sound >like a simple case. Bite the bullet and do a good job of isolating >no matter what you use - the performance of your K3 depends on >it. Directly connecting an $11 piece of equipment to a $1000 piece >of equipment and expecting no adverse consequences is a lot to be expected. >It *can* be done - the devil is in the details. > >73, >Don W3FPR > >Dave Martin wrote: >>We'll have to get some ideas for a simple buffer that will provide >>good isolation. Otherwise before long questions will be popping up >>about spurious responses and noise with our new K3s. >> >> >>On Dec 23, 2007 2:19 PM, Lyle Johnson <[hidden email]> wrote: >> >>>>Any one have any experience with the softrock and the K3... >>>> >>>PLEASE remember that you *must* have a high-reverse isolation buffer >>>between the K3 IF OUT jack and the Softrock antenna input. The Softrock >>>may have a huge spur at its carrier frequency and its mixer may not >>>suppress this adequately. So there is a potential coupling problem >>>(mixer) and radiation problem (shielding). The IF out of the K3 does >>>not have high reverse isolation characteristics, so you need to ensure >>>you do not couple a signal at the IF *into* the K3 through this connector. >>> >>>73, >>> >>>Lyle KK7P _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Rowland-8
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