[Elecraft] FT report on K3 subreceiver
Are there any field tester reports on subreceiver function and integration? N1KO ___ 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] QSK and Monitor on the K3
I ran QSK all weekend in the CQP with the K3 driving an Alpha 87A and a Pro3 driving another 87A. I like to reduce the monitor level as low as possible and on the K3/87A combo, it was extremely quiet and smooth. But the Pro3 could not subdued by comparison. First of all, even with the sidetone reduced to zero, there was still leakage that was much louder than what the K3 could be adjusted to. In addition, the Pro3 had popping and slapping on the TX/RX transitions between code elements that was very tiring. The Pro3 in one ear made it impossible to copy weak signals on the K3 in the other ear. I was constantly having to manually switch the headphones to the K3 only when working a station on that radio. The other way was fine ... K3 transmitting in one ear while copying a weak signal on the Pro3 in the other ear. At least six K3's were on in the CQP: AB7R, N0SS, W6GV (K2VCO), N6XI, K7RAT (N6TR) and K6YT (W0YK). 73, Ed - W0YK ___ 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] FT report on K3 subreceiver
Are there any field tester reports on subreceiver function and integration? The KRX3 has not been released from engineering. No one has it yet. 73, Ed - W0YK ___ 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] Re: [PVRC] Today's Wall Street Journal
it's a K1 .. video available on wsj.com On 10/8/07, Brian F. Wruble [EMAIL PROTECTED] wrote: Front page article on Chuck Adams K7QO and his attempts to keep CW alive. Great article. Picture of an Elecraft K-1 (I think) as well. 73 de Brian W3BW ___ PVRC mailing list [EMAIL PROTECTED] http://mailman.qth.net/mailman/listinfo/pvrc ___ 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] Comparison: K3 and SDR 5000A
Hi Bill, I would like to balance the scales here a little bit. First of all, I am not only an Elecraft fan, but a Flex-Radio fan as well. I own a K2 as well as an SDR-1000. I love what all these guys have done for Amateur Radio in the past few years. We are all the beneficiaries of their excellent engineering and competitive spirits. After some long and hard thinking, I chose the SDR-5000A over the K3. I think the specs are very close and either rig will do better than anything I've ever owned before, including the K2, the SDR-1000 and an Icom 756PRO. And all of those rigs were more than adequate in my location. Of course, your mileage and mission may vary. I think the K3 and 5000A will both blow away the Icom - Yaesu competition costing many thousands more. I think your cost analysis is a bit overstated. I don't understand why Flex Radio priced the 5000C so high. I think a fairer comparison is with the 5000A plus a stand alone computer. I imagine that most hams would be able to use the computer currently in their shack. I upgraded mine to a dual core AMD Athlon 64 X2 by throwing in a new motherboard, etc. for a few hundred dollars when I got the SDR-1000. The CPU runs at less than 20% when running the SDR-1000 full bore. For the $600 you mention for a PC, you can get more than enough machine off the shelf to run an SDR-5000A plus everything else in the shack simultaneously (e.g., logging program, PSK-31, etc.). So now the calculation looks like: SDR-5000A$2799 Computer $600 Total$3399, not $5098. I don't think you need the $99 knob. In my case I already have the computer, and I bought the radio just before the October 1 price increase, so my cost is $2499, or actually $2798 with the ATU. Ergonomically, I must say that I really like the computer GUI of the PowerSDR. I was skeptical at first, and was reluctant to give up my knobs, but I don't even reach for them anymore. Tuning is very smooth with a mousewheel, and its very easy to reach for other programs on the screen while operating by just simply moving the mouse. I also like the fact that you can connect various programs to the PowerSDR program through virtual audio and port connections - that is you can, for instance interface a PSK31 program to the radio audio and com port without any cables, etc. You can have many such channels running simultaneously. The radio should also improve over time as the software continues to evolve. Very cool. But most of all for me, its about the bandscope. I got hooked by the 756PRO, and the SDR-1000 brought my addiction to a whole other level. Its not just seeing, its doing. Point and click tuning. Point and drag tuning. Visual bandedge filter adjustments by dragging an edge. Etc. For me, this was the key deciding factor for going with the SDR-5000A rather than the K3, where to me, the other specs are very close. But in a perfect world, I'd own both. 73, Rich W1EZ - Original Message - From: Bill Tippett [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Saturday, October 06, 2007 3:52 PM Subject: [Elecraft] Comparison: K3 and SDR 5000A Form Factor: This is a religious issue with some. Knobs versus no knobs. Real Radios Don't Need Knobs (Flex's slogan). I suppose the K3's corollary slogan is Real Radios Don't Need Computers. :-) Cost (for the 5000 it depends on whether you already have a fairly high-performance computer dedicated to your shack. I'm going to compare the 5000C which includes the computer and will assume $200 for an LCD display): 5000C $5098 (no ATU, $200 display plus a $99 knob option) K3$2825 (assembled K3/100, KXV3, KRX3, 2X 500 Hz filters) Of course the K3 does not include a bandscope, but the KXV3 provides the wide bandwidth buffered IF output to do this. Eventually Elecraft, Clifton Labs or someone will provide this. The solution could be as simple as a SoftRock40 on the 8.215 MHz output to something much more exotic. Let's assume $400 for something like a Clifton Labs Z91 plus another $600 for an adequate computer and display, resulting in an additional $1000 for interface hardware, computer and display. I'm assuming free software based either on Rocky or PowerSDR. This results in: 5000C $5098 K3+ $3825 Advantage: K3 which will have basic RX performance exceeding the 5000 (see above) and a parallel SDR bandscope. Assuming someone like HB9DRV integrates this with his Ham Radio Deluxe program, I believe the K3 will maintain a significant price advantage over the 5000C. 73, Bill W4ZV ___ 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:
Re: [Elecraft] FT report on K3 subreceiver
On Mon, Oct 08, 2007 at 05:16:53AM -0500, [EMAIL PROTECTED] wrote: Are there any field tester reports on subreceiver function and integration? Nope - becauses there aren't any out there yet. However, it is exactly the same hardware as the main receiver and you have the same control over it as you do the main one - so it should work exactly as well. Tree ___ 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] Re: K2 IF amplifier output fault
Alan, When I was diagnosing low audio output in s/n 3641, one of the several things I found was a leaky cap at C10. There was a small AC component on the /AGC OFF signal that was making it through to U1 pin 2, and that upset the entire downstream chain. It's a stretch, but the fact that you can't get full AGC voltage in test 8 sounds kind of familiar... 73 de chris K6DBG ___ 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] FT report on K3 subreceiver
I apologize if this has already been discussed or already posted on the Elecraft site, but: If I combine a K3 with an XV144 transverter: - would I be able to use main and sub bands to simultaneously listen to, for example, 40 meter CW and 2 meter FM -- controlling each signal's volume independently through the same speaker? - what 2 meter receive frequency coverage would this allow? I'd like to be able to receive up to 154 MHz or so. Please reply off list. Thanks, --Andrew ___ 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] FT report on K3 subreceiver
That raises an interesting point, not that I think I'd need to do this in current conditions, but a K3, KXV3 and a XV144 would only allow you to Rx/TX on one 2M freq at any one time - so it would effectively take another KXV3 and a XV144 to be able to receive 2M via 2nd Rx in K3 - something that probably isn't going to be easy to do - probably easier to buy another K3 as well. On 8/10/07 16:41, Andrew Moore [EMAIL PROTECTED] sent: I apologize if this has already been discussed or already posted on the Elecraft site, but: If I combine a K3 with an XV144 transverter: - would I be able to use main and sub bands to simultaneously listen to, for example, 40 meter CW and 2 meter FM -- controlling each signal's volume independently through the same speaker? - what 2 meter receive frequency coverage would this allow? I'd like to be able to receive up to 154 MHz or so. -- The bamboo that bends is stronger than the oak that resists. -Japanese proverb ___ 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] KSB2 OP1 filter USB response...
--- Steve Kallal [EMAIL PROTECTED] wrote: It has been a few weeks since I built the KSB2 option. There is one problem I haven't yet resolved. The response on the USB side of OP1 is not as broad as the LSB side, and has a narrower peak. Hi Steve. Assuming your KSB2 is working properly, what you are seeing may very well be a familiar characteristic of the crystal ladder filter used in the rig. I ran some sweeps of my K2/100 several years ago, the results of which clearly illustrate this effect. Response vs. frequency plots may be found here: http://www.qsl.net/kd2bd/ksb2.html The response is slightly asymmetric, with the roll-off being noticeably sharper on one side of the passband than the other. This is normal. The side with the sharper roll-off will (in my opinion) ring more than the gentler side. As such, audio products that hit the sharper edge may appear to be over-emphasized, so it might be beneficial to tailor your microphone's audio response and the BFO frequencies to avoid hitting this edge with too much audio. Also, be aware that due to the mixing scheme of the transceiver, the audio characteristics you observed are not only a product of the sideband selected, but also the frequency band you've on as well. 73, de John, KD2BD Visit John on the Web at: http://kd2bd.ham.org/ . . . . Shape Yahoo! in your own image. Join our Network Research Panel today! http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 ___ 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] K3 simultaneous main/sub receive
I should have edited the subject line prior to my post. My bad. Corrected now, to keep things a little more clear on the list. a K3, KXV3 and a XV144 would only allow you to Rx/TX on one 2M freq at any one time - so it would effectively take another KXV3 and a XV144 to be able to receive 2M via 2nd Rx in K3 - something that probably isn't going to be easy to do - probably easier to buy another K3 as well. If I combine a K3 with an XV144 transverter: - would I be able to use main and sub bands to simultaneously listen to, for example, 40 meter CW and 2 meter FM -- controlling each signal's volume independently through the same speaker? - what 2 meter receive frequency coverage would this allow? I'd like to be able to receive up to 154 MHz or so. ___ 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] FT report on K3 subreceiver
... a K3, KXV3 and a XV144 would only allow you to Rx/TX on one 2M freq at any one time Actually, I suspect it is possible to configure things so that you can *receive* on two different 2m frequencies if using a K3 equipped with Aux receiver. 73, Lyle KK7P ___ 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] K3 simultaneous main/sub receive
If I combine a K3 with an XV144 transverter: - would I be able to use main and sub bands to simultaneously listen to, for example, 40 meter CW and 2 meter FM -- controlling each signal's volume independently through the same speaker? I expect this would be the case. 73, Lyle KK7P ___ 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] FT report on K3 subreceiver
OH YES Today's the Day, I can't wait Hi On 8/10/07 17:13, Lyle Johnson [EMAIL PROTECTED] sent: ... a K3, KXV3 and a XV144 would only allow you to Rx/TX on one 2M freq at any one time Actually, I suspect it is possible to configure things so that you can *receive* on two different 2m frequencies if using a K3 equipped with Aux receiver. 73, Lyle KK7P -- The trees that are slow to grow bear the best fruit. -Moliere, actor and playwright (1622-1673) ___ 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] Re: FT report on K3 subreceiver
Lyle Johnson wrote: ... a K3, KXV3 and a XV144 would only allow you to Rx/TX on one 2M freq at any one time Actually, I suspect it is possible to configure things so that you can *receive* on two different 2m frequencies if using a K3 equipped with Aux receiver. Yes. There are two ways to do this. 1. The main and sub can share the received signal coming from the XVTR IN jack, via the passive 3-dB splitter. 2. The sub receiver's aux RF input can be routed to the AUX RF BNC jack near the main antenna jacks. This jack could be connected to RX I.F. output of a second transverter. This would eliminate the splitter, although in practice, the NF of the system is established at the input to the transverter, not its I.F. But it would allow you to get the main and sub RX inputs from separate transverters if required. You could even use different I.F.s. The K3 allows you to set up each transverter band independently (up to 9 bands), and put the two receivers on different bands. 73, Wayne N6KR ___ 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] Re: FT report on K3 subreceiver
That is just Fantastic and I have all components on order - is the 3-dB splitter included in K3/100 or KXV3? If not, I'll have to order one, but don't remember seeing that as an option On 8/10/07 17:23, wayne burdick [EMAIL PROTECTED] sent: Lyle Johnson wrote: ... a K3, KXV3 and a XV144 would only allow you to Rx/TX on one 2M freq at any one time Actually, I suspect it is possible to configure things so that you can *receive* on two different 2m frequencies if using a K3 equipped with Aux receiver. Yes. There are two ways to do this. 1. The main and sub can share the received signal coming from the XVTR IN jack, via the passive 3-dB splitter. 2. The sub receiver's aux RF input can be routed to the AUX RF BNC jack near the main antenna jacks. This jack could be connected to RX I.F. output of a second transverter. This would eliminate the splitter, although in practice, the NF of the system is established at the input to the transverter, not its I.F. But it would allow you to get the main and sub RX inputs from separate transverters if required. You could even use different I.F.s. The K3 allows you to set up each transverter band independently (up to 9 bands), and put the two receivers on different bands. 73, Wayne N6KR -- Either that wallpaper goes, or I do. - last words of Oscar Wild ___ 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] Re: [PVRC] Today's Wall Street Journal
It may be that the WSJ requires a subscription to view this article. If this is the case, I have the article and will forward it to anyone who wants it. 73! Ken Kopp - K0PP [EMAIL PROTECTED] or [EMAIL PROTECTED] ___ 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] Re: FT report on K3 subreceiver
That is just Fantastic and I have all components on order - is the 3-dB splitter included in K3/100 or KXV3? It is an integral part of the KRX3. Lyle ___ 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] Re: FT report on K3 subreceiver
The passive 3-dB splitter is only needed with the subreceiver, and is a part of that assembly. 73, Wayne N6KR On Oct 8, 2007, at 9:30 AM, David Ferrington, M0XDF wrote: That is just Fantastic and I have all components on order - is the 3-dB splitter included in K3/100 or KXV3? --- 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
[Elecraft] [Fwd: WSJ.com - --- -. . -- .- -. .----. ... -... .. -.. - --- ... .- ...- . -- --- .-. ... . -.-. --- -.. .]
On 10/8/07, Brian F. Wruble [EMAIL PROTECTED] wrote [on the elecraft list]: Front page article on Chuck Adams K7QO and his attempts to keep CW alive. Great article. Picture of an Elecraft K-1 (I think) as well. 73 de Brian W3BW Yes, that is a K1. When you email a link from the wsj.com web site, it is good for a few days - so follow one of these links and read it now! 73! jeff wk6i ps: This is currently the 6th most emailed article today! Original Message Subject:WSJ.com - --- -. . -- .- -. .. ... -... .. -.. - --- ... .- ...- . -- --- .-. ... . -.-. --- -.. . Date: Mon, 8 Oct 2007 10:16:08 -0700 (PDT) From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Click the following to access the sent link: WSJ.com - --- -. . -- .- -. .. ... -... .. -.. - --- ... .- ...- . -- --- .-. ... . -.-. --- -.. . http://www.emailthis.clickability.com/et/emailThis?clickMap=viewThisetMailToID=887156760* This article will be available to non-subscribers of the Online Journal for up to seven days after it is e-mailed. *This article can also be accessed if you copy and paste the entire address below into your web browser. http://online.wsj.com/wsjgate?subURI=%2Farticle%2FSB119161604206850468-email.htmlnonsubURI=%2Farticle_email%2FSB119161604206850468-lMyQjAxMDE3OTAxODYwMTg2Wj.html -- Jeff Stai [EMAIL PROTECTED] Twisted Oak Winery http://www.twistedoak.com/ Winery Blog http://www.elbloggotorcido.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
[Elecraft] Attn: John, N8ELR
John, Your server appears to be rejecting my e-mail(s) Do you have another address? Ken Kopp - K0PP [EMAIL PROTECTED] ___ 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] OT: looking for a ride to Pacificon
Hi, I'm going to be visiting a friend in San Jose (actually Campbell) and am looking for a ride from there to San Ramon on Friday morning for Pacificon. I won't need a ride back in the evening since we're headed out of town (camping) for the weekend. Please reply off-list if you can help me out or know someone who can. Thanks! -john W4PAH Chapel Hill, NC ___ 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] FS: hard-sided case (photo)
Here is a link to photos of the case I am selling. http://i7.ebayimg.com/06/i/000/b9/84/8b65_1.JPG http://i8.ebayimg.com/05/i/000/b9/84/94a4_1.JPG Thanks. -john W4PAH ___ 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] FS: hard-sided case for KX1
Hi all, I have one hard-sided case for sale for the KX1. It has foam interior and two locks outside. Great for traveling. Very professional looking. These have been sold on eBay in the past for $25 + shipping. From a non-smoking home. Please see the photos linked to in the previous post. I will sell it to you for $20 + shipping (your choice, UPS, USPS, etc.). Please contact me off-list. Thanks! -john W4PAH ___ 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] K2 AGC Threshold Adjustment
Hi, When I built my K2/100 the threshold adjustment didn't go right, I turn trimmer R1 full CCW to get 3.74v on pin5 of U2 (full CW pin 5 goes to 2.6v). This adjustment is supposed to swing U2 pin 5 fom from 4 to 8 v. I checked diode polarity, resistor values, everything but never did find the problem. Now I'm building another K2 and have encountered exactly the same result. Anybody got a clue? 73, Jim Jim Stoneback K4AXF Drake SW8 K2.ssb.100 sn 6194 K2 sn 6263 (underway) ___ 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
Fwd: [Elecraft] Comparison: K3 and SDR 5000A
Hi Richard, W1EZ wrote: Hi Bill, I would like to balance the scales here a little bit. First of all, I am not only an Elecraft fan, but a Flex-Radio fan as well. I own a K2 as well as an SDR-1000. I love what all these guys have done for Amateur Radio in the past few years. We are all the beneficiaries of their excellent engineering and competitive spirits. And add excellent customer responsiveness by both companies through forums like this! Ten-Tec is also much more responsive than the Big 3. After some long and hard thinking, I chose the SDR-5000A over the K3. I think the specs are very close and either rig will do better than anything I've ever owned before, including the K2, the SDR-1000 and an Icom 756PRO. And all of those rigs were more than adequate in my location. Of course, your mileage and mission may vary. I think the K3 and 5000A will both blow away the Icom - Yaesu competition costing many thousands more. I think your cost analysis is a bit overstated. I don't understand why Flex Radio priced the 5000C so high. I think a fairer comparison is with the 5000A plus a stand alone computer. I imagine that most hams would be able to use the computer currently in their shack. I upgraded mine to a dual core AMD Athlon 64 X2 by throwing in a new motherboard, etc. for a few hundred dollars when I got the SDR-1000. The CPU runs at less than 20% when running the SDR-1000 full bore. For the $600 you mention for a PC, you can get more than enough machine off the shelf to run an SDR-5000A plus everything else in the shack simultaneously (e.g., logging program, PSK-31, etc.). So now the calculation looks like: SDR-5000A$2799 Computer $600 Total$3399, not $5098. I don't think you need the $99 knob. In my case I already have the computer, and I bought the radio just before the October 1 price increase, so my cost is $2499, or actually $2798 with the ATU. Thanks for your analysis which is probably representative of computer-savvy hams. Not everyone has a dual-core processor with 2GB of RAM (required for the 5000) running his station and I also question how many would be willing to upgrade motherboards, processors, etc themselves. Maybe the truth lies somewhere in between our two estimates. In my case I only have a 250 MHz Win98SE system in my shack, so I would need a completely new system. As I implied previously, IMHO the 5000A appeals to folks who love to tinker with computers and software. For those who don't, the 5000C Plug and Play package may be probably more realistic. Ergonomically, I must say that I really like the computer GUI of the PowerSDR. I was skeptical at first, and was reluctant to give up my knobs, but I don't even reach for them anymore. Tuning is very smooth with a mousewheel, and its very easy to reach for other programs on the screen while operating by just simply moving the mouse. I also like the fact that you can connect various programs to the PowerSDR program through virtual audio and port connections - that is you can, for instance interface a PSK31 program to the radio audio and com port without any cables, etc. You can have many such channels running simultaneously. The radio should also improve over time as the software continues to evolve. Very cool. Again this gets down to personal preferences. HF DX contests are one of my personal interests. I cannot imagine operating a mouse/GUI as quickly as using the classical knob UI refined over some 50 years of contesting. N6TR is probably one of the finest contest operators in the world, who I believe has won the NCJ CW Sprint (the most difficult contest in the world) more times than anyone else. Tree is also very savvy about computers and software (he's the author of TR-Log...a high performance contest program for SO2R), having even written a robot program to control all TX, RX and logging functions many years ago (i.e. no human involvement required!) When I see top contest operators like Tree switch to SDRs with GUIs, then I'll become a true believer. Tree is a beta tester for the K3 and is switching from two TS850s to two K3s. I know some VHF contesters are using SDRs successfully, where the bandscope helps find stations on otherwise dead bands, but the pace of VHF operation (i.e. QSOs/hour) is much lower than in HF contests, where top operators make octaves more contacts in the same period of time. But most of all for me, its about the bandscope. I got hooked by the 756PRO, and the SDR-1000 brought my addiction to a whole other level. Its not just seeing, its doing. Point and click tuning. Point and drag tuning. Visual bandedge filter adjustments by dragging an edge. Etc. For me, this was the key deciding factor for going with the SDR-5000A rather than the K3, where to me, the other specs are very close. But in a perfect world, I'd own both. The way I see it, the
Fw: [Elecraft] [Fwd: WSJ.com - --- -. . -- .- -. .----. ... -... .. -.. - --- ... .- ...- . -- --- .-. ... . -.-. --- -.. .]
Subject: Re: [Elecraft] [Fwd: WSJ.com - --- -. . -- .- -. .. ... -... .. -.. - --- ... .- ...- . -- --- .-. ... . -.-. --- -.. .] BTW, it is currently the 4th most mailed WSJ article today. Must be a bunch of people interested in this arcane grin subject. 4. One Man's Bid to Save Morse Code Travis, K4TNT 73! Ken Kopp - K0PP ___ 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] K2 AGC Threshold Adjustment
Hi This voltage will depend on the tolerance of the 8 volt regulator. If the 8 volt supply is on the low side of the tolerance then you will not be able to reach the 3.8 volts. However 3.75 should be close enough as this is just a ballpark adjustment. The final adjustment will be made later by turning the AGC on and off and adjusting for no change in the background noise. Don Brown KD5NDB - Original Message - From: Jim Stoneback [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Monday, October 08, 2007 1:53 PM Subject: [Elecraft] K2 AGC Threshold Adjustment Hi, When I built my K2/100 the threshold adjustment didn't go right, I turn trimmer R1 full CCW to get 3.74v on pin5 of U2 (full CW pin 5 goes to 2.6v). This adjustment is supposed to swing U2 pin 5 fom from 4 to 8 v. I checked diode polarity, resistor values, everything but never did find the problem. Now I'm building another K2 and have encountered exactly the same result. Anybody got a clue? 73, Jim Jim Stoneback K4AXF Drake SW8 K2.ssb.100 sn 6194 K2 sn 6263 (underway) ___ 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] CW Reverse
Good day, I use Logger32 with my K2 and I've just noticed that when loading a spot or doing a direct frequency entry it clears the CW reverse setting. This looks like a Logger32 issue, direct frequency input from SD contest logging app leaves CW reverse intact. Logger32 also cancels split which can lead to embarrassing circumstances. Regards, Mike VP8NO ___ 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] Need advice - which Elecraft rig for SE Asia?
Hi Vic Just out of curiousity, have you metered the K3's current draw in receive mode? I expect to use my K3 at 5w on FD next year, and want to start planning for the battery/solar bank to run it. Thanks and 73 Bob N6WG - Original Message - From: Vic K2VCO [EMAIL PROTECTED] To: Chris Wagner [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Sunday, October 07, 2007 10:56 PM Subject: Re: [Elecraft] Need advice - which Elecraft rig for SE Asia? Chris Wagner wrote: Is the K3's filters an improvement to the K2's variable one? Are machines or people building the factory assembled K3s? Has someone compared K2 and K3 side by side? Thank you! The K3's filters are much better than the K2's, in terms of IMD performance and ultimate rejection. The K3 has both an analog noise blanker and a DSP noise blanker; the combination is effective against the Chinese radar (at least as heard in California!). Note the DSP noise blanker is different from the DSP noise *reduction*, which is an entirely different function. NR reduces background noise which makes listening more comfortable, but does not remove pulse noise. The K2 has an optional analog noise blanker and an optional DSP which provides an NR function. The K3 comes with the analog noise blanker, the DSP noise blanker, and the DSP NR function. All of the above are much more easily adjustable on the fly in the K3. I have listened to the K2 and K3 side by side and the K3 is much better in many ways. Of course, it is also bigger, more expensive, and more power-hungry (which might matter if you will run it from batteries). -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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] Comparison: K3 and SDR 5000A
The flex radio is making big strides into the AM community, because it allows better then broadcast quality audio on TX, or communications quality , or anything in-between, and also allows tricks with the modulation, negative clipping, compression, EQ, very good fidelity reception, and of course the band scope feature. I am not fond of computers in the shack, don't contest or DX, but the flex stuff is starting to look very interesting to me. The 5000D? will have true diversity reception and 300 watts pep output, computer built in, auto antenna tuner, built in power supply, and all sorts of other new things they will think up in the software... Not sure what it will cost, but it looks like it will do whatever you want to do in radio. It sure would be an odd mix in my shack, with all the homebrew vacuum tube stuff! Brett N2DTS ___ 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] Need advice - which Elecraft rig for SE Asia?
Robert Tellefsen wrote: Hi Vic Just out of curiousity, have you metered the K3's current draw in receive mode? I expect to use my K3 at 5w on FD next year, and want to start planning for the battery/solar bank to run it. Yes, actually, it's about 1 amp. It might be less if you don't have the 100w amp installed; it doesn't seem to matter if you turn the power down to 5 watts with the amp in place. The second RX would also increase the current drawn. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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] K2 headphone jack removal - a tip
The time finally arrived to replace the headphone jack on my K2, #755. I read over the various removal methods others had posted. Some seemed a little 'brutal' given the delicate nature of the component. I had an Exacto razor saw blade in my tool drawer and that worked great! The headphone jack has small stand-off 'dimples' on the bottom of it. That allowed just enough clearance to insert the blade. You must get a firm grip on the RF board and use the back stroke on the blade rather than the push stroke or your own combination to cut through the metal pins. I removed one of the screws attached to the adjacent 2D fastener for a better 'angle of attack' for the blade. Then it is a matter of solder-wick or sucker to remove the remaining pieces of the pin left soldered to the circuit board. Don't forget to either whisk or blow the small metal filings off the circuit board. No band-aids were required! 73, Roger WA7BOC K2 #755 ___ 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] K2 AGC Threshold Adjustment
Jim Since the problem is the same between two radios built some time apart, I have to ask, are you using the same meter? If so, try borrowing one from a friend and make the measurement. It is possible your meter is a bit off. At least, it's worth a simple test. Good luck and 73 Bob N6Wg - Original Message - From: Jim Stoneback [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Monday, October 08, 2007 11:53 AM Subject: [Elecraft] K2 AGC Threshold Adjustment Hi, When I built my K2/100 the threshold adjustment didn't go right, I turn trimmer R1 full CCW to get 3.74v on pin5 of U2 (full CW pin 5 goes to 2.6v). This adjustment is supposed to swing U2 pin 5 fom from 4 to 8 v. I checked diode polarity, resistor values, everything but never did find the problem. Now I'm building another K2 and have encountered exactly the same result. Anybody got a clue? 73, Jim Jim Stoneback K4AXF Drake SW8 K2.ssb.100 sn 6194 K2 sn 6263 (underway) ___ 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] Need advice - which Elecraft rig for SE Asia?
Thanks, Vic I'll probably start my K3 with no PA, as I'm a full-time QRPer. That would help keep the drain down to some- thing manageable. Also no 2nd RX to start anyway. What would be your impression of the difficulty of removing the 100w PA to keep drain down for FD? Thanks and 73 Bob N6WG - Original Message - From: Vic K2VCO [EMAIL PROTECTED] To: Robert Tellefsen [EMAIL PROTECTED]; Elecraft Reflector elecraft@mailman.qth.net Sent: Monday, October 08, 2007 12:23 PM Subject: Re: [Elecraft] Need advice - which Elecraft rig for SE Asia? Robert Tellefsen wrote: Hi Vic Just out of curiousity, have you metered the K3's current draw in receive mode? I expect to use my K3 at 5w on FD next year, and want to start planning for the battery/solar bank to run it. Yes, actually, it's about 1 amp. It might be less if you don't have the 100w amp installed; it doesn't seem to matter if you turn the power down to 5 watts with the amp in place. The second RX would also increase the current drawn. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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] K2 IF amplifier output fault
Don et al, I think I may have made forward progress. With or without D40/D41 I cannot get more than about 10mV at the output of the MC1350 IF amp when performing the IF Amp Saturated Output test. This is with the RF gain at minimum and as much signal into the antenna jack as my sig gen can produce (3V RMS PD). However, why would Elecraft have me do this test with the RF gain at minimum? We are trying to produce as much output as possible. So I set the RF gain to maximum and now there is 280mV of signal at the output of the IF amp, which is what the manual predicts. Although there is no figure quoted, I find I need 1mV from the sig gen to produce the 150mV for the next test (2nd crystal filter loss measurement). The receiver goes on to pass all the subsequent tests. Having peaked the input filters and re-run the BFO calibration I measure the MDS in 700Hz to be -132dBm with the preselector off and -138dBm with it on. This is within experimental error of the specs in the manual. So, the receiver isn't deaf. However, it still sounds very quiet to me. 7mV of audio hiss at full volume (yes, within spec) is just not loud at all. Sorry to have wasted everyone's time, although I do think the manual either misprints minimum RF gain when it means maximum, or they really do expect you to pump much more than 3V (+23dBm) into the poor thing! 73, Alan G3XAQ In message [EMAIL PROTECTED], Don Wilhelm [EMAIL PROTECTED] writes Alan, Those levels listed in the manual were developed before the Strong Signal Handling diodes D40 and D41 were added to the design. Lift one end of both diodes and re-test the Saturated IF Amplifier test - the IF amp may not saturate fully with the diodes in place. While that may not be the full answer to your problem, it may provide some additional insight. Do you have your BFOs adjusted properly for the signal pitch you are attempting to receive? Do you have the KDSP2 installed? If so, temporarily remove it and replace with jumpers in the headers to substitute for R18 and R19. Another side note - your HP6840 can inject a 4913 kHz signal directly into the IF amp if you remove the SSB board (or in the W3 jumper position if the KSB2 is not installed). That may or not be helpful, but it can give another data point. 73, Don W3FPR Alan Ibbetson wrote: I'm working on K2 S/N 4590 (Rev B pcb). The receiver suffers from the dreaded low audio output fault, meaning it's short on overall gain. Sensitivity tests show it to be deaf. Although 50uV RMS PD does show near s9 on the meter (s7 to s9 depending on band), reducing the generator output from this -73dBm by 30dB drops the S meter to s1. Another 10dB reduction in generator level (to -113dBm) makes the signal disappear, so the MDS is more than 20dB poorer than expected. I've followed the signal tracing procedure in Appendix E of the manual. It all looks OK, with signals within a few dB of the expected values, until I get to the IF Amp Saturated Output test. There should be up to 300mV of output with large input signals. No matter what input signal level I use at the antenna, even levels as high as 1V RMS, I cannot get more than about 10mV RMS on pin 8 of U12, the output of the MC1350 IF amp chip. I get D40/D41 going into hard limiting long before I reach 1V antenna input. The 8v DC supply looks OK; the voltage drop across R112 suggests the chip is drawing 7.3mA. Also, and probably as a consequence of the low IF output, I can't get more than 5V of AGC at pin 1 of U2 on the control board, and AGC test 8 says I should get 6.9V. I've lifted one end of R111, the swamping resistor across L34, and it measures 5K6 as expected. I've replaced the MC1350 chip and it has made no difference. The 10mV or so of signal at the output of the chip does seem to get through the second xtal filter OK and is down converted to audio by U11 with a voltage conversion gain of 2, as expected. My test gear is an HP 8640B sig gen, a Boonton 92B RF millivoltmeter, and a Fluke 8842A multimeter. I have no reason to suspect them of lying. It looks like there is a fault around the output circuit of the IF amplifier. I wonder if anyone else has heard of faults here? I can find nothing on the reflector archives. I'm only mildly suspicious of L34, the Toko 4.7uH output inductor. Do they ever fail? This one shows a resistance of 0.3 ohms, measured in-circuit. Is this reasonable? I measure 2450R from U12 pins 1 or 8 to earth. Unsoldering L34 for examination will be a major effort. Before I embark on that journey, I wonder if anyone has any insights? Can someone confirm I really should be seeing over 150mV of RF at the output of U12 with very big antenna input signals? ___ 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.):
[Elecraft] Attn: Dave W1EUY
Dave, Be alert for another incomng message from me. Ken Kopp - K0PP [EMAIL PROTECTED] or [EMAIL PROTECTED] ___ 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] K2 IF amplifier output fault
Alan, Great to hear that you have found success. Yes, I do believe that manual has an omission. It would be difficult to saturate the IF amp with the RF Gain set to minimum. I believe you are reading from Appendix E page 12 - while on page 11, it says to set the RF Gain to minimum (necessary for item 7 on page 12), but item 8 should include setting the RF gain to 'maximum' if I understand what is being tested correctly. The K2 is quiet with no signal - it was designed to be that way. The other factor is that most receivers have much more reserve audio output power than the K2, so one cannot 'crank up the audio' and hear a LOT of noise, especially with no antenna connected. It makes no sense to listen to the noise floor of the receiver at a loud level anyway. If you connect an antenna you should hear the band noise above the receiver noise level (on the HF bands with any decent antenna). One benefit to all your trouble - at least you know the K2 will stand a +23 dBm signal at its input with no ill effects! 73, Don W3FPR Alan Ibbetson wrote: Don et al, I think I may have made forward progress. With or without D40/D41 I cannot get more than about 10mV at the output of the MC1350 IF amp when performing the IF Amp Saturated Output test. This is with the RF gain at minimum and as much signal into the antenna jack as my sig gen can produce (3V RMS PD). However, why would Elecraft have me do this test with the RF gain at minimum? We are trying to produce as much output as possible. So I set the RF gain to maximum and now there is 280mV of signal at the output of the IF amp, which is what the manual predicts. Although there is no figure quoted, I find I need 1mV from the sig gen to produce the 150mV for the next test (2nd crystal filter loss measurement). The receiver goes on to pass all the subsequent tests. Having peaked the input filters and re-run the BFO calibration I measure the MDS in 700Hz to be -132dBm with the preselector off and -138dBm with it on. This is within experimental error of the specs in the manual. So, the receiver isn't deaf. However, it still sounds very quiet to me. 7mV of audio hiss at full volume (yes, within spec) is just not loud at all. Sorry to have wasted everyone's time, although I do think the manual either misprints minimum RF gain when it means maximum, or they really do expect you to pump much more than 3V (+23dBm) into the poor thing! ___ 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] Griffin EarJams
My XYL came home with these last weekend: http://www.griffintechnology.com/products/earjams/ She has small ears, and couldn't get her ipod's earbuds to stay in. These worked out really well for her. That used up only one pair - the other pair happen to fit the earbuds I use with my K2 (I don't have a set of headphones that I like for radio work...) Wow, what a difference! They're not kidding about increasing the volume and isolation. I typically kept the AF pot between 9 and 12 o'clock; now I rarely get it as high as 9 o'clock (in fact, the earbuds may be *too* sensitive). An interesting artifact of this is that at the very bottom of the AF pot's range, there seems to be an area where I can hear very weak signals but the atmospheric noise hasn't quite come in... The only downside is that she needs to stand in front of me to get my attention when I'm playing radio :-) These might be really good for my KX1, which is always too quiet... 73 de chris K6DBG ___ 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] K2 IF amplifier output fault
It is a quiet receiver. The only thing quieter I have run into, that still hears weak signals, is my homebrew single conversion receiver, and that is likely not as sensitive as the K2. On both receivers, I have made the mistake in thinking the antenna fell down, and gone outside to look. Now I mostly hang out on 80 and 40 meters, and when its quiet, it has fooled me more than once into checking the antenna. Its sort of like the old days before all that noisy high gain IC chips came out, when you had simple tube type receivers without preamps, when it was quiet, it was quiet. Nowadays, when its quiet, its not as noisy... Brett N2DTS So, the receiver isn't deaf. However, it still sounds very quiet to me. 7mV of audio hiss at full volume (yes, within spec) is just not loud at all. Sorry to have wasted everyone's time, although I do think the manual either misprints minimum RF gain when it means maximum, or they really do expect you to pump much more than 3V (+23dBm) into the poor thing! 73, Alan G3XAQ ___ 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] XV50: Problem with Errata C-4
I'm trying to build my first XV, an XV50, and I just hit a road block. First, the page number references in the C-4 Errata don't match those in my Rev. C manual. #1 Page 25, Right Column, Second Step: Remove L17 from the list. (The tuning slug for L17 should be left in the inductor). I'm confused by this for a couple reasons. First, page 25 has no reference to L17. In fact, on page 25 you are just wrapping up the front panel assembly. Second, where you are about to install L17 on page 33, there is no mention about removing any of the slugs. It just says to run the cores up and down and then set near the top of the coil. On page 34, you solder them in. So, what am I actually supposed to do with L17? Install it as normal? Then, the next step: #2 Page 25, Right Column, Second Step: After L10 add In the XV50, the inductor is a toroid and has no slug. Ok, I think I can figure this out but, again, the page numbers don't match and it actually references the same step as the first item. The page numbers for the remaining steps 3, 4, and 9 also don't seem to make sense but they are alignment issues and I think I can figure them out. I am really becoming disappointed with the quality of Elecraft's documentation of late. I had a number of documentation issues with my Rev. G manual K2 build. Several parts were substituted with different parts and not documented in any type of Errata and there were several formatting issues with the parts tables. Several part numbers were cut off and/or didn't fit in the cells. I had emailed my documentation issues as I found them to Elecraft but I only ever received a reply on one of them. I hope the problems with the documentation aren't signs that Elecraft is too narrowly focused on the K3 at the moment and neglecting current products. Thanks for any help on just what to do with L17. I presume I'm to just install it as I do L15 and L16. -- JT Croteau, N1ESE - Manchester, NH (FN42gx) ___ 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] Griffin EarJams
Chris Kantarjiev wrote: An interesting artifact of this is that at the very bottom of the AF pot's range, there seems to be an area where I can hear very weak signals but the atmospheric noise hasn't quite come in... This is fascinating. It could be an artifact of the radio's design, or... Could we possibly be seeing a process here in which the dynamic range of the human ear/wetware is being increased by lowering the amplitude range of the input? Maybe mammalian ears evolved to work better (i.e., more discrimminatingly) at lower volume levels... This might make sense in evolutionary terms, when you come to think about it. Bill W5WVO ___ 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] Griffin EarJams
Bill W5WVO wrote: Chris Kantarjiev wrote: An interesting artifact of this is that at the very bottom of the AF pot's range, there seems to be an area where I can hear very weak signals but the atmospheric noise hasn't quite come in... This is fascinating. It could be an artifact of the radio's design, or... Could we possibly be seeing a process here in which the dynamic range of the human ear/wetware is being increased by lowering the amplitude range of the input? Maybe mammalian ears evolved to work better (i.e., more discrimminatingly) at lower volume levels... This might make sense in evolutionary terms, when you come to think about it. Or my ears could be broken :-) Now that you mention it, though, it mimics my experience at louder volumes, where turning the AF gain *down* makes the signal stand out more and copy easier. I was just really surprised to hear the volume of the noise seem to come up separately from the signal. And pleased to find that I could hear the signal with the EarJams on, and that it was completely missing with them off ... but I don't have a closed headphone to compare with. All this will probably be moot in, oh, a couple of years when the sunspots come back :-) 73 de chris K6DBG ___ 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] Rig Control
I am using Puppy Linux and have installed FLDIGI. Is anyone using this to control their K2 and/or the K3? Being a Linux dummy...I would be willing to install some other logging/control program, IF there are howtos for the Linux impaired. Thanks 73 - k3hrn Thom,EIEIO Email, Internet, Electronic Information Officer www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ 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] EarJams and Fletcher-Munsen
The perceived reduction of noise, when listening at lower volumes, can well be related to the Fletcher-Munsen effect. The response curve of the human ear changes relative to the input level. The human ear responds best to mid-frequencies at low volume levels, and low and high frequencies are considerably attenuated. As the level increases, the response curve tends to flatten out. The loudness control on many stereos changes the response curve to compensate for this deficiency. Don't ask me to test it - I wear hearing aids. Neal WA6OCP ___ 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] HI CUR question
I sometimes get a HI CUR warning on my new K2. I have the high current set at 2.5 amps. My power supply is steady but on 40 meters when the SWR is slightly high but below 2:1, I get a HI CUR when running 10 watts out. Into a good 50 ohm dummy load I get 2.02 amps on 40 meters. I've double checked my output filter tuning and all is good. Is this something to be concerned about or is this in the normal range of xmit current at 10 watts? Larry Naumann N0SA ___ 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] Fried N-Gen - what components to reorder?
I accidentally transmitted into my Elecraft N-Gen wideband noise generator and now it doesn't generate noise. Surprise, surprise. I assume I need to replace the MAR-1. As long as I'm ordering, what other parts might need replaced? --Andrew ___ 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] HI CUR question
Larry, The bare K2 (no KAT2, no KPA100, no KAT100) will respond like that if the antenna load has an impedance less than 50 ohms - it is not likely to happen when the antenna feedpoint impedance is higher than 50 ohms. It all has to do with the way the basic K2 handles its power control - it assumes that the load is 50 ohms and measures the RF Voltage at its output and adjusts the power until it is correct (or runs out of gain). When the impedance at the K2 output is lower than 50 ohms, it takes more power to produce the required RF voltage, so your K2 puts out more power - however the K2 does not know it is producing more power because the RF voltage is still low. Your Hi Cur messages are the result the K2 producing this higher power level. Conversely, if your antenna feedpoint impedance were higher than 50 ohms, the K2 would not actually be producing as much power as it thinks it is, and you would see a lower current. This condition is not likely to damage the K2, but if you want real power output indication you will have to use a tuner of some sort to produce a 50 ohm resistive load for the K2. The KAT2 or KAT100 will do that, and also have a real wattmeter included so the K2 power control circuits will not be dependent on the SWR. 73, Don W3FPR Larry Naumann wrote: I sometimes get a HI CUR warning on my new K2. I have the high current set at 2.5 amps. My power supply is steady but on 40 meters when the SWR is slightly high but below 2:1, I get a HI CUR when running 10 watts out. Into a good 50 ohm dummy load I get 2.02 amps on 40 meters. I've double checked my output filter tuning and all is good. Is this something to be concerned about or is this in the normal range of xmit current at 10 watts? ___ 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] Fried N-Gen - what components to reorder?
Andrew, Replace the MAR-1 and, in all likelihood, everything will work just fine. Of course if the power level was quite high, you might want to look for charred components. I have done that 'stupid trick' several times myself. I try to put the K2 into CW Test state as a precaution, but sometimes it 'just happens'. 73, Don W3FPR Andrew Moore wrote: I accidentally transmitted into my Elecraft N-Gen wideband noise generator and now it doesn't generate noise. Surprise, surprise. I assume I need to replace the MAR-1. As long as I'm ordering, what other parts might need replaced? ___ 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] Re: CX Report
There has been an IARU bandplan that just came out. NOW is the time to support it and restrict contests to the sectors that are befitting the mode. The RTTY guys run rampant all over the band and are making HF comms hell for others who would like a piece of the pie too. This will get worse as modes like CW and AM become obsolete in their eyes. There IS a simple solution: retrict the contests to a small slice of the band. Assign monitoring stations to list those that stray out of these assigned segments. The penalty would be disqualification of log for those who do so. This would require that ARRL, IARU, RSGB and others stand by these standards so that the contesters would not monopolize the WHOLE band with their fun! There is no reason why the contests shouild take up the whole CW or whole SSB segments or RTTY should run rampant over the entire band during the contests. I am mainly a QRP contester, but the QRP folks have taken steps to usually restrict their contests to narrow segments of the CW bands to avoid stepping on the toes of those who wish not to participate. Does this proposal make any sense to your folks out there? 73, Sandy W5TVW - Original Message - From: David Thompson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, October 08, 2007 2:08 PM Subject: Re: CX Report Sandy, I was working the YL/OM phone a few years ago and calling CQ YL and at 0Z the North American Sprint came on. These guys tried to steam roll me. K0GAS (a YL) worked me so I would give her a sprint QSO. Moved to 40 to get away from them. This year I was working the QCWA party and had to move to SSB from CW as some RTTY contest came on and wiped out the CW bands. A few years ago the State QSO parties almost died as W5NQR/NQQ ran the LA one and I and K4BAI the GA one and almost no one came. Now they and those sprints are all over plus there is a RTTY one every weekend now (I am on the writelog reflector so I see posts about them). Some hams do 2 contests a weekend EVERY weekend and now those sprints are weeknights. I first entered the ARRL SS in 1958 so I have been around for years and quiet QSO parties such as CX and QCWA are being pushed off the map. Too bad. What to do? I have complained to the three or four people who CONTROL contests and they laugh me off. CQ and ARRL just look the other way. And as you probably remember I run the CQ 160 Contests. 73 Dave K4JRB -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.488 / Virus Database: 269.14.4/1057 - Release Date: 10/8/2007 9:04 AM ___ 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] Fried N-Gen - what components to reorder?
order a few, it won't be the first time :) de w1rt/john On 10/8/07, Don Wilhelm [EMAIL PROTECTED] wrote: Andrew, Replace the MAR-1 and, in all likelihood, everything will work just fine. Of course if the power level was quite high, you might want to look for charred components. I have done that 'stupid trick' several times myself. I try to put the K2 into CW Test state as a precaution, but sometimes it 'just happens'. 73, Don W3FPR Andrew Moore wrote: I accidentally transmitted into my Elecraft N-Gen wideband noise generator and now it doesn't generate noise. Surprise, surprise. I assume I need to replace the MAR-1. As long as I'm ordering, what other parts might need replaced? ___ 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
[Elecraft] NAQCC October Sprint
This Tuesday evening, the North American QRP CW Club will be holding its monthly sprint. Here are the particulars: Date and time: Wednesday October 10th, 0030-0230 UTC (Remember that's Tuesday evening here in the USA) That's 8:30 - 10:30 EDT, 7:30 - 9:30 CDT, 6:30 - 8:30 MDT and 5:30 - 7:30 PDT. Bands - Frequencies: 80M - 3555-3565 kHz (Be courteous to FISTS operating on 3558 kHz) 40M - 7039-7050 kHz (Avoid W1AW on 7047.5 kHz). 20M - 14059-14065 kHz. General: A particular station may be worked once on each band. Operate CW only. All licensed amateurs are invited to participate, but only those operating QRP (5 watts or less) are eligible for awards. Call: CQ NA Exchange: RST - SPC (State Province or Country) - NAQCC Nr. (non-Members substitute power level for NAQCC Nr., e.g. 5W, 1W, etc. Be sure to add the W.) QSO Points: QSO with a Member, 2 points. QSO with a Non-member, 1 point. Multipliers: Each USA state Each VE province Each country except W/VE All multipliers count only once in the contest. Bonus: If you use only a straight key for the entire sprint, multiply your score by 2. If you use only a bug for the entire sprint, multiply your score by 1.5. If you key with anything other than a straight key or bug, there is no bonus multiplier. Categories: SWA - simple wire antennas - for those using a simple wire antenna per NAQCC definition. GAIN - gain antennas - for those using other than a simple wire antenna. Special Award: Our special award this month goes to the one who has the most QSO's with our special event call N3A/# in their log. We will have N3A/# calls from all 10 call areas active in the sprint. In case of a tie, the SA goes to the one with the highest score. If a 1st or 2nd place certificate winner also qualifies for winning the SA, the SA goes to the next highest scorer. That is because we want as many members as possible to receive one of our certificates. You must indicate in your report if you are applying for the SA, and how many N3A/# QSO's are in your log. The following are our operators: 1 call area - N3A/1 - N1LU (NH) 2 call area - N3A/2 - KD2MX (NJ) 3 call area - N3A/3 - WY3H (PA) 4 call area - N3A/4 - AA4W (FL) 5 call area - N3A/5 - AE5BH (TX) 6 call area - N3A/6 - K6BBQ (CA) 7 call area - N3A/7 - WY7N (UT) 8 call area - N3A/8 - WB8LZG (MI) 9 call area - N3A/9 - W9ILF (IN) 0 call area - N3A/0 - NO2D (CO) Prize: We have TWO prizes this month. Karl N3IJR has kindly donated a Hendricks DC40 QRP Transceiver kit to be given away in honor of the NAQCC's 3rd Anniversary this month. Club President Tom WY3H has decided it will be awarded to the highest scoring MEMBER who has never previously won a 1st or 2nd place certificate in our sprints nor won any other physical prize. In case you don't remember if you've ever won anything, here is a list of winners. Club officers not eligible. So if you qualify to be a winner, get geared up for a maximum effort this month to win this very nice prize. Tie breaking procedures will be the same as for our regular CD's giveaway below. Continuing this month we are giving away a set of CD's to one participant according to the following rules: 1. The participant meeting the requirements below and posting the highest score will be the winner of a set of CD's in the following months: July, August, September, October, November, January, February, March, April, and May. A. Requirements: The participant must be a NAQCC member and can not have won a CD set previously. Previous winners are: K4BAI (Jul 07) K1EV (Aug 07) KI4GLH (Sep 07) B. If the highest scorer does not meet the requirements, then the CD set winner will be the next highest scorer who does meet the requirements. REMEMBER: You HAVE to be a NAQCC member to be eligible to win the CDs; and there's still plenty of time to join before Tuesday night's sprint. To join the NAQCC, please visit: http://www.arm-tek.net/~yoel//joinup.html Entry Deadline: All entries must be RECEIVED before 2400Z on October 16th 2007. So submit as soon as possible, especially regular mail entries. NEW! NEW! NEW! Be sure to use the new NAQCC Sprint Autologger feature! Please visit http://home.alltel.net/johnshan/sprintlog.html after the Sprint to send in your entry! For further information, please visit: http://www.arm-tek.net/~yoel//sprintrules.html ___ 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] Melbourne Florida hamfest this weekend
Hello everyone, We are trying to organize an Elecraft table for the Melbourne, Florida hamfest this weekend. Lisa is sending a banner and literature. I can bring my K2 to show off. We need some help from some of the Elecraft faithful to be sure that the table is staffed. We also need a few folks to bring along their Elecraft goodies to show off. You don't need to know anything special, just be willing to share your Elecraft experience. If you can help at the table or if you want to bring along something to display, please contact me at [EMAIL PROTECTED] Any help will be very much appreciated - and you will have a great time. Doug Shields W4DAS ___ 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] Comparison: K3 and SDR 5000A
W4VZ wrote: Thanks for your analysis which is probably representative of computer-savvy hams. Not everyone has a dual-core processor with 2GB of RAM (required for the 5000) running his station and I also question how many would be willing to upgrade motherboards, processors, etc themselves. Maybe the truth lies somewhere in between our two estimates. In my case I only have a 250 MHz Win98SE system in my shack, so I would need a completely new system. As I implied previously, IMHO the 5000A appeals to folks who love to tinker with computers and software. For those who don't, the 5000C Plug and Play package may be probably more realistic. I may have given you the wrong impression. Although I am capable of changing a motherboard, I in no way meant to imply that such knowledge is required or that changing a motherboard is necessary. My point is that computers and memory are pretty cheap and readily available today. For the $600 you mentioned, you typically get a pretty powerful computer right off the shelf - with plenty of power to run the SDR-5000A (you don't need dual-core - but they are pretty standard these days at this price). No need to change the motherboard or anything else. I was trying to make the point that, if you are a computer-savvy ham you can even save more money by doing it yourself. But a $600 PC right out of the box will work just fine. Also, by all reports the SDR-5000A is plug and play with the PC - but I guess you do need to be able to find the firewire port and load some software. Ergonomically, I must say that I really like the computer GUI of the PowerSDR. Again this gets down to personal preferences. HF DX contests are one of my personal interests. I cannot imagine operating a mouse/GUI as quickly as using the classical knob UI refined over some 50 years of contesting. N6TR is probably one of the finest contest operators in the world, who I believe has won the NCJ CW Sprint (the most difficult contest in the world) more times than anyone else. Tree is also very savvy about computers and software (he's the author of TR-Log...a high performance contest program for SO2R), having even written a robot program to control all TX, RX and logging functions many years ago (i.e. no human involvement required!) When I see top contest operators like Tree switch to SDRs with GUIs, then I'll become a true believer. Tree is a beta tester for the K3 and is switching from two TS850s to two K3s. I know some VHF contesters are using SDRs successfully, where the bandscope helps find stations on otherwise dead bands, but the pace of VHF operation (i.e. QSOs/hour) is much lower than in HF contests, where top operators make octaves more contacts in the same period of time. I will admit that 50 years of contesting by turning a knob is a lot of momentum to overcome. You certainly can't argue with success, and I wouldn't expect a top contesters to readily change their form and adopt a new paradigm without some certainty of success. Of course, they might just get picked off in the next contest by someone who has. I think there is great efficiency in the PowerSDR GUI interface. I'm a casual contester at best so can only tell you my experience. Being able to see the whole spectrum at a glance and pick off signals instantly with a point and click of the mouse seems to me to be ideal for contesting. The resolution of the PowerSDR bandscope is quite good and the ability to select stations on a crowed band is quite remarkable - especially for CW. Want to monitor another signal, stick the second receiver on top of it with a single click of the mouse. Send the audio from different receivers to separate speakers. You are already at the keyboard with logging and other control programs - why keep reaching up to tune the radio? I think it is just a matter of time before some serious contesters adopt this new approach. But in a perfect world, I'd own both. The way I see it, the K3 allows you to have both. You have the superior RX performance benefits (IMD, BDR Phase Noise over a wide spectrum) of a narrow front-end superhet rig *plus* an SDR bandscope on the buffered IF output. The K3 will allow the latter for a small increment (e.g. a $15 Softrock40, free Rocky software or even PowerSDR, some additional isolation buffering, a $100 soundcard and a 1 GHz 256MB (WinME or higher) computer (non dual-core). I'm guessing $400 is a reasonable increment. Bill, I believe you are mistaken here. Adding a bandscope to the K3 does not give you the benefit of the SDR rig. Yes, with your approach you will be able to see signals in a bandscope format. But for the SDR-5000A run by the PowerSDR program, the bandscope is a fundamental part of the GUI for controlling the radio. You don't only see the signals on the bandscope, but you tune to them by simply pointing and clicking on the bandscope. You can also drag the signal you want into your bandpass. You can adjust
Re: [Elecraft] Re: CX Report
Sandy wrote: There has been an IARU bandplan that just came out. NOW is the time to support it and restrict contests to the sectors that are befitting the mode. The RTTY guys run rampant all over the band and are making HF comms hell for others who would like a piece of the pie too. This will get worse as modes like CW and AM become obsolete in their eyes. There IS a simple solution: retrict the contests to a small slice of the band. The same thing happens when there is a major you name it contest . The CW guys say the SSB guys run rampant all over the band .. And the CW guys say the CW contesters run rampant all over the band . The QRP guys say that when ever there is a non-QRP event on the band It's hard to restrict the running rampant. As more and more of us retire it should be less and less of a problem on weekends! 72 73HankK8DD -- --- If God intended you to be on single sideband, he would have given you only one nostril. - Steve, K2PTS (SK) --- ___ 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] Fried N-Gen - what components to reorder?
Hi Andrew, An alternative might be to build N0SS Tom Hammond's noise gen circuit that you will find on his web site and also on the Elecraft site. It uses a zener diode, a couple of 2Ns and a small handful of passive components. I built one up on perf board last weekend in a couple of hours, and it works really well. You don't need a printed circuit board, ugly style or Manhattan construction is quite OK. 73 Kevin VK3DAP / ZL2DAP Andrew Moore wrote: I accidentally transmitted into my Elecraft N-Gen wideband noise generator and now it doesn't generate noise. Surprise, surprise. I assume I need to replace the MAR-1. As long as I'm ordering, what other parts might need replaced? snip ___ 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
