Re: [Elecraft] New K3 Manual
wb8yqj wrote: Great job guys - filled in the new CONFIG table and a fine index to boot. vy Fb... Is it available in hard copy to purchase? Alternatively, does anyone know of a service that can print and bind a PDF file in the UK? - Julian, G4ILO http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directory -- View this message in context: http://n2.nabble.com/New-K3-Manual-tp661189p661911.html Sent from the Elecraft mailing list archive at Nabble.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
SV: [Elecraft] New K3 Manual
wb8yqj wrote: Great job guys - filled in the new CONFIG table and a fine index to boot. vy Fb... Is it available in hard copy to purchase? Alternatively, does anyone know of a service that can print and bind a PDF file in the UK? - Julian, G4ILO Many of us are still waiting for the 2nd RX option to be delivered. I suggest that an updated hard copy for the entire K3 would be delivered from Elecraft together with that, free or not I do not care much. It seems more efficient getting it from there as they will be printing for subsequent deliveries of K3. Len/SM7BIC ___ 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: Re: [Elecraft] New K3 Manual
In A5 size wud be nice for /P David G3UNA From: Julian, G4ILO [EMAIL PROTECTED] Date: 2008/07/31 Thu AM 09:37:54 BST To: elecraft@mailman.qth.net Subject: Re: [Elecraft] New K3 Manual wb8yqj wrote: Great job guys - filled in the new CONFIG table and a fine index to boot. vy Fb... Is it available in hard copy to purchase? Alternatively, does anyone know of a service that can print and bind a PDF file in the UK? - Julian, G4ILO http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directory -- View this message in context: http://n2.nabble.com/New-K3-Manual-tp661189p661911.html Sent from the Elecraft mailing list archive at Nabble.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 - Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam ___ 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] Problem with K2 computer interface
Good morning everyone, I have just started fooling around with ham radio deluxe with my K2 and have run into a snag. The Radio stopped talking to the computer. Everything worked fine for about 24 hours and just stopped. I didn't change anything as far as I know so I'm stumped. I checked my solder connections on the cable, reloaded the driver for the USB to serial cable and made sure PORT was still turned on. On HRD I am getting a message K2, COM4, 4800, Failed to read frequency. Make sure your radio is switched on and not in memory mode. If you are using a homemade/nonstandard cable you may need to select RTS and /or DTR. When I try to use the K2 Remote program I get the message K2 is not responding. Please check radio power and RS232 Comm Port. Any suggestions? Thanks in advance Brian N1WNC K2 5946 ___ 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: [K3] [Elecraft] Problems with K3 KXV3 IF Output Level?
Fern Rivard wrote: Good evening Lyle: I honestly don't know where you're getting those levels from as I already reported to you back in April/08 that the levels at the I F output were pretty well non existent. There is just no tracking of levels at the I F out with what is fed into the antenna input of the receiver. I even used a 15 db amplifier from Jack Smith of Clifton Laboratories without any luck as there is simply no levels to play with there. I believe that Jack Smith also queried you about that without getting a proper reply as yet from you. I realize that nobody is perfect but why are we dogging a proper reply and/or fix for that? Fern with K3 #412 See N8LP's comments below. My IF OUT level improved ~7.5 dB with his mod which involves changing R8 to 15k and R9 to 50 ohms on the K3 RF Board. 73, Bill Re: [LP-PAN] Re: K3 IF output The NF of LP-PAN by itself is the same as the K3 with preamp off. A signal at about -127dBm (0.1uV) can be heard about equally well with 500 Hz filter above the noise floor of about -135dBm. But the overall NF of LP-PAN depends on the K3. This is because the losses in the K3 mixer / internal buffer add to the NF. In a stock K3, these losses add up to about 17dB. Turning the K3 preamp on helps a lot, since the preamp has low NF and adds gain ahead of the losses, where it has a greater effect on the overall NF. The simple mod I did to my K3 internal buffer reduces the losses by almost 10dB, while only reducing the IP3 of the system by a couple dB. My modified K3 / LP-PAN combo has an overall NF that is below atmospheric noise here on all bands but 10m... with the K3 preamp off. This seems to me to be a reasonable balance of signal handling and sensitivity. Turning the K3 preamp on, without the mod, produces a similar result as I recall. Unless you regularly see signals above -20dBm, leaving the K3 preamp on should not be a problem. I haven't seen a signal that strong here yet, even during FD where I had two stations within a mile of my QTH. I haven't heard anything more from Wayne about the possibility of a running change in the K3 circuit, but the mod is simple to do if you like. It's changing two resistors (actually one can be paralleled to the existing one), similar to doing the HAGC mod. Several users have done it. 73, Larry N8LP -- View this message in context: http://n2.nabble.com/New-PowerSDR-IF-K3-Video-posted-tp641057p662155.html Sent from the [K3] mailing list archive at Nabble.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] Re: K3 6m pre-amp
Or BF981 would work nicely. However don´t know how hard to get they are these days. A preamp with NF below 1 can easily be built with a BF981, forexample the YU1AW cavity design with BF981. 73 Jim SM2EKM - Jack Colson wrote: I personally would use a MGF-1302. 73 Jack, W3TMZ - Original Message - From: Jack Smith [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Wednesday, July 30, 2008 6:48 PM Subject: Re: [Elecraft] Re: K3 6m pre-amp Don: The U310's are not too easy to find these days. Vishay seems to be the most common (only?) new production supplier and the one-off price is about $14 from Mouser or Arrow. Digikey, Allied and Newark only stock the SOT23 plastic surface mount version. TO-92 plastic case parts, the J310, are around 25 cents each. The U310 and J310 are supposed to have the same die, so differences should be attributed to the case, but who knows what goes inside the package these days, particularly if it is from China. If I were building a pre-amp based upon a U310, I would start with a J310 and get it thoroughly debugged before experimenting with U310's at $14 a pop. It's something like the 40673 dual gate FET - once ubiquitous and now difficult to find and expensive when found. Jack K8ZOA Don Wilhelm wrote: Bob, While I cannot speak from my own measurements, but in EMRFD, Wes Hayward recommends the U310s for VHF/UHF rather than the J310. The case of the U310 is connected to the gate, and when used in a grounded gate configuration, the case can be mounted (upside down) into a hole in the PC board, and I believe that alone should provide better input to output isolation. The Vishay data sheet indicates a slightly lower noise figure for the U310. I would suggest that you try the J310s. If you find them lacking, it should be easy to change to U310s, I would guess that at 50 MHz, it may be a 'toss-up' decision. 73, Don W3FPR Bob Tellefsen wrote: Hi John I've been looking at this circuit for some time. I have a number of J310s, but no U310s. Do you know whether they are the same animal, just in different casings? 73, Bob N6WG ___ 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: Re: [Elecraft] New K3 Manual
David Cutter wrote: In A5 size wud be nice for /P David G3UNA Laurent Ferracci, F1JKJ (http://www.ferracci.org - laurent at ferracci.org) has offered to print and bind the manual for free, and post it to anyone in Europe for EUR 5 sent to him by PayPal. He can do A4 or A5. He has authorized me to post this offer to the list, as the reflector is blocking him as a spammer. - Julian, G4ILO http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directory -- View this message in context: http://n2.nabble.com/New-K3-Manual-tp661189p662165.html Sent from the Elecraft mailing list archive at Nabble.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] Re: K3 6m pre-amp
Oh well a cavity design might not be the way to go on 6m, it might get a bit too big when I think about it. A very low NF isn´t needed in the first place. There are a ton of transistors that can be used, after all it´s only 50 MHz. /SM2EKM -- Jan Erik Holm wrote: Or BF981 would work nicely. However don´t know how hard to get they are these days. A preamp with NF below 1 can easily be built with a BF981, forexample the YU1AW cavity design with BF981. 73 Jim SM2EKM - ___ 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: K3 6m pre-amp
MGF1302 is a GaSFet transistor. Used to be popular in preams on 144/432 MHz amongst EME´ers. A device like that is far from needed on 50 MHz also since the MGF1302 is designed for a much higher frequency it actually might not be a good deal to use it on 50 MHz. I would stay away from GaSFet´s and Dual Gate MosFet´s on 50 MHz, not needed. A 2N5109 might be a good deal. / de SM2EKM Bob Tellefsen wrote: Don't think I've seen that kind of model number before, Jack. What is it and who makes it? Thanks and 73 Bob N6WG - Original Message - From: Jack Colson [EMAIL PROTECTED] To: Jack Smith [EMAIL PROTECTED]; [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Wednesday, July 30, 2008 4:37 PM Subject: Re: [Elecraft] Re: K3 6m pre-amp I personally would use a MGF-1302. 73 Jack, W3TMZ ___ 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
FW: [Elecraft] Problem with K2 computer interface (Problem Solved)
Problem is solved thanks to OZ7UV Thanks again 73 N1WNC ___ 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] Problem with K2 computer interface
Brian, First check the easy things - the menu settings. Does your K2 still have a sidetone? Press SPOT to see. If no sidetone, go into the menu for ST L and EDIT the parameter, then tap the DISPLAY button until you hear the sidetone (the sidetone source must be U8-4 for the computer interface to work). Secondly, go into the secondary menu and be certain PORT is set to ON. Next, on your computer make sure the COM port settings are correct - in HRD check to see if the COM port is the same one your computer is actually using for the USB to serial adapter and that the rate is set to 4800. If possible, try using a computer with a real serial port while you are checking things out. If that does not cure your problem, you are in for some signal tracing and troubleshooting. 73, Don W3FPR Brian wrote: Good morning everyone, I have just started fooling around with ham radio deluxe with my K2 and have run into a snag. The Radio stopped talking to the computer. Everything worked fine for about 24 hours and just stopped. I didn't change anything as far as I know so I'm stumped. I checked my solder connections on the cable, reloaded the driver for the USB to serial cable and made sure PORT was still turned on. On HRD I am getting a message K2, COM4, 4800, Failed to read frequency. Make sure your radio is switched on and not in memory mode. If you are using a homemade/nonstandard cable you may need to select RTS and /or DTR. When I try to use the K2 Remote program I get the message K2 is not responding. Please check radio power and RS232 Comm Port. Any suggestions? ___ 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] Canceled my K3, bummer.
I canceled my K3 order. With the price of food and fuel along with everything else, I figured it would be smart to hold off for now. The good news is that I still have my K2 which is a terrific rig and I'm guessing that everyone else gets bumped up another notch! I still plan to buy a K3, it's just not going to happen as soon as I wanted. Gary, N7HTS ___ 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] Canceled my K3, bummer.
Hello Gary, It's ok. Perhaps, you will be able to get a more mature K3 later. Bearing in mind, K2 becomes 'stabilised' after s/n 4xxx. cheers, Johnny Siu VR2XMC --- 2008年7月31日 星期四，Gary D Krause [EMAIL PROTECTED] 寫道﹕ 寄件人: Gary D Krause [EMAIL PROTECTED] 主題: [Elecraft] Canceled my K3, bummer. 收件人: Elecraft elecraft@mailman.qth.net 日期: 2008 7 31 星期四 下午 9:24 I canceled my K3 order. With the price of food and fuel along with everything else, I figured it would be smart to hold off for now. The good news is that I still have my K2 which is a terrific rig and I'm guessing that everyone else gets bumped up another notch! I still plan to buy a K3, it's just not going to happen as soon as I wanted. Gary, N7HTS Yahoo! [EMAIL PROTECTED] 電郵地址，想登記你的新身份? 請前往 http://hk.promo.yahoo.com/mail/ymail/ 了解更多相關資訊! ___ 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] Problem with K2 computer interface (Problem Solved)
Here was the solution to my problem. Simple fix but I would never have known. The credit goes to Jim Purvis via Svend, OZ7UV. Thanks First access the secondary menus by pressing MENU then DISPLAY. Scroll to PORT and insure it is ON. Press EDIT to underscore the ON. Since the MCU in the K2 must be set to use pin 25 as a data port, be sure the sidetone and SPOT button works in CW mode. Other wise, U6 pin 25 may be setup as a sidetone source and not as a data pin. It is changed between the two by editing the ST L menu entry and pressing the Display button until U8-4 is seen rather then U6-25. You may have to switch off the power after you make this change if the sidetone sitll doesnt work and repeat the process several times it is is unsuccessful. (I did not have to switch off or try more than once.) In a nut shell go to ST L menu and see if you are using U6-25 for sidetone. IF SO change it to U8-4. This will free up U6-25 for use as a data pin. Thanks again, Brian N1WNC ___ 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: Problems with K3 KXV3 IF Output Level?
...There is just no tracking of levels at the I F out with what is fed into the antenna input of the receiver. If that were true, LP-PAN, SDR-14 and SDR0IQ could not be used as panadaptors. But they can and are being used, so one can only conclude that the output at the IF jack most assuredly follows the signal at the input. Note that there are a mulititude of signals at the IF output connector since this is the unfiltered output from the mixer post-amplifier. These signals must be accounted for in any device which attaches to the IF output jack. See URL:http://www.telepostinc.com/LP-PAN.html and scroll about halfway down the page to L.O. leakage / isolation: for details The lower the impedance of the attached load, the lower the gain (or increased loss) there will be at the IF output. We're talking microvolt levels here, not hundreds of millivolts. 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
[Elecraft] K3 Anybody heard anything on the status of KDVR3
K3 Anybody heard anything on the status of KDVR3? Tnx es 73, de Jim KG0KP ___ 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 Anybody heard anything on the status of KDVR3
K3 Anybody heard anything on the status of KDVR3? It is actively being worked on. 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] Re: K3 6m pre-amp
Yes, I have a number of 2N5109s. I use them in my HF preamps. Thanks, Jan Erik. 73, Bob N6WG - Original Message - From: Jan Erik Holm [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Thursday, July 31, 2008 4:38 AM Subject: Re: [Elecraft] Re: K3 6m pre-amp MGF1302 is a GaSFet transistor. Used to be popular in preams on 144/432 MHz amongst EME´ers. A device like that is far from needed on 50 MHz also since the MGF1302 is designed for a much higher frequency it actually might not be a good deal to use it on 50 MHz. I would stay away from GaSFet´s and Dual Gate MosFet´s on 50 MHz, not needed. A 2N5109 might be a good deal. / de SM2EKM Bob Tellefsen wrote: Don't think I've seen that kind of model number before, Jack. What is it and who makes it? Thanks and 73 Bob N6WG - Original Message - From: Jack Colson [EMAIL PROTECTED] To: Jack Smith [EMAIL PROTECTED]; [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Wednesday, July 30, 2008 4:37 PM Subject: Re: [Elecraft] Re: K3 6m pre-amp I personally would use a MGF-1302. 73 Jack, W3TMZ ___ 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] New K3 Manual
Hey Julian, Dang - what a generous offer, it's not often the US boys end up on the wrong side of the pond. ;-) I did what I always to, printed the manual double sided, hole punched it, then penciled in my notes (like the K3 CONFIG settings). Also include the color printed assembly manual in that binder which is one step up from Elecraft's hardcopy. On a side note - if you have LP-Pan try the panadapter to 1500ms averaging, IMO it compares favorably with the IC756p integrated display. Very cool. [Elecraft] New K3 Manual Julian, G4ILO julian.g4ilo at gmail.com Thu Jul 31 07:27:49 EDT 2008 Laurent Ferracci, F1JKJ (http://www.ferracci.org - laurent at ferracci.org) has offered to print and bind the manual for free, and post it to anyone in Europe for EUR 5 sent to him by PayPal. He can do A4 or A5. - Julian, G4ILO http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directory -- ___ 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: Problems with K3 KXV3 IF Output Level?
Lyle: As we have discussed, the K3 does not follow the normal commercial/military practice of providing a 1:1 relationship between the IF sample and the signal level at the antenna port. Since the K3 has a switchable pre-amp, the 1:1 relationship would presumably be with the pre-amp off. As I understand it, there's something like a 15 dB difference between the signal level at the antenna input port and the IF sample out. I'll have a better feel for this when my K3 arrives (ordered in May 2007; has been waiting for the 2nd receiver, maybe shipped in August 2008), but I've had reported to me a couple of measurements in that range. The J310 used to provide the K3's IF sample has a voltage divider on the input that knocks down the signal level from the sample point. In addition, the J310 in source follower mode has an output impedance in the 100-200 ohm range, depending on idle bias current. (Output impedance is 1/gm and gm varies with bias/idle current.) Thus, if connected to a 50 ohm device, such as a spectrum analyzer or a receiver, there's an additional loss in the 10 dB range. Now, a Softrock or Larry's LP-PAN has enough sensitivity to overcome most or all of this loss, but it's still a design error. (The IF sample can also be amplified by an external amplifier such as my Z1-U. If configured in high Z input mode, the J310's output impedance becomes a non-issue.) Jack K8ZOA www.cliftonlaboratories.com Lyle Johnson wrote: ...There is just no tracking of levels at the I F out with what is fed into the antenna input of the receiver. If that were true, LP-PAN, SDR-14 and SDR0IQ could not be used as panadaptors. But they can and are being used, so one can only conclude that the output at the IF jack most assuredly follows the signal at the input. Note that there are a mulititude of signals at the IF output connector since this is the unfiltered output from the mixer post-amplifier. These signals must be accounted for in any device which attaches to the IF output jack. See URL:http://www.telepostinc.com/LP-PAN.html and scroll about halfway down the page to L.O. leakage / isolation: for details The lower the impedance of the attached load, the lower the gain (or increased loss) there will be at the IF output. We're talking microvolt levels here, not hundreds of millivolts. 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 ___ 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 Anybody heard anything on the status of KDVR3
Lyle Johnson wrote: K3 Anybody heard anything on the status of KDVR3? It is actively being worked on. 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 I have been advised yesterday evening by Katiegram that it won't be available until late fall. 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj 2m DXCC #11/6m DXCC #815 ___ 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] Problems with K3 KXV3 IF Output Level?
Fern, I am using the IF output AOK from my K3/KXV3. I am using it with a Clifton Labs isolation Z1U buffer/preamp with very low gain into a Softrock40 With a LO of 8191 kHz with WU2X's version of PowerSDR as the panadaptor display, offset by 24 kHz (8215-8191). This with a Delta-44 sound card sampling at 96 kHz. I would estimate that, with a 50 uV signal into the K3, the KXV3 is putting out something in the 20-50 uV range. Using my test oscillator at 1 uV output into the K3, I see an obvious peak on the panadaptor, so the sensitivity is OK. I haven't calibrated PowerSDR levels yet, but it is already near the correct S9 level on the display for 50 uV from my test oscillator into the K3. Connect up another receiver to the KXV3's IF output and see if you don't hear sigs repeated on it when you tune it near 8.215 MHz. If the K3 is hearing sigs, you should hear sigs on that second rx near whatever freq the K3 is tuned to, and their levels will be similar to what the K3 is hearing. This will tell you if your K3/KXV3 is working OK. Keep working on it - the PowerSDR panadaptor is the best I have ever used in 35 years of using panadaptors. Jerry W4UK At 12:08 AM 7/31/2008, Fern Rivard wrote: Good evening Lyle: I honestly don't know where you're getting those levels from as I already reported to you back in April/08 that the levels at the I F output were pretty well non existent. There is just no tracking of levels at the I F out with what is fed into the antenna input of the receiver. I even used a 15 db amplifier from Jack Smith of Clifton Laboratories without any luck as there is simply no levels to play with there. I believe that Jack Smith also queried you about that without getting a proper reply as yet from you. I realize that nobody is perfect but why are we dogging a proper reply and/or fix for that? Fern with K3 #412 - Original Message - From: Lyle Johnson [EMAIL PROTECTED] To: Don Ehrlich [EMAIL PROTECTED] Cc: Elecraft Reflector elecraft@mailman.qth.net Sent: Wednesday, July 30, 2008 9:18 PM Subject: Re: [Elecraft] K3 KXV3 IF Output Level? The 2nd antenna input works as expected but my oscilloscope shows no signal (5 mV) coming from the IF Output on the KXV3. What IF signal level should I be seeing? It will be about the same level as at the antenna, or perhaps less, depending on settings of PRE, ATT, etc. 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
[Elecraft] KX1 Q6 question...
Can anyone help on the following... At what serial number did the PA (Q6) change from a 2SC2166 to a 2SC5739?? Was there any other reason than getting away from the metal tab?? Better performance?? Or TIA -- Dave G. KK7SS '65 MK III Sprite in Richland, WA The Original Point and Click --- Smith and Wesson ___ 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: pseudo KRX3 free via LP-Pan+Power SDR
I think what Eric is saying is that if you watch PowerSDR and listen to the K3 / KRX3, it will be a super combination. You will be able to see the passbands of both VFO A and VFO B frequencies and tune either one from the K3 or pan display, as long as the sub-receiver is tuned to within +/- 90kHz of the main receiver. There are some good reasons why listening to the K3 / KRX3 is desirable, especially for CW (and why the K3 blows the doors off the Flex Radios for CW). The main ones are the latency of the DSP processing in PowerSDR, and the serial interface of the K3. Under extreme contest situations, the added protection of the HAGC will be needed, and on the higher bands (10,6m), the K3 has more usable sensitivity because the transfer loss at the K3 IF output port adds to the NF of the panadapter. And the KRX3 allows cross band listening, more filter slots, etc. But many non-contesters will find that using the sub receiver in PowerSDR will be a viable option, especially in SSB. PowerSDR is no slouch when it comes to IMD and BDR, and has excellent DSP filtering. Up to about S9 + 65dB (K3 preamp off) the BDR is comparable to the K3 at spacings down to less than 1 kHz. Of course, in both cases transmitter IMD will be a bigger problem than BDR anyway. Either way, the operational flexibility of the panadapter in split mode is a killer feature. Being able to see holes in a pileup and click on them, or quickly jump to the frequency of the last guy who was answered will be invaluable. When full VFO B support is released in a couple weeks, I'll have some beta testers with KRX3s in hand, and I can get some comparative feedback. Larry N8LP Date: Wed, 30 Jul 2008 22:19:10 -0700 From: Brett Howard [EMAIL PROTECTED] Subject: RE: [Elecraft] K3: pseudo KRX3 free via LP-Pan+Power SDR To: [EMAIL PROTECTED] Cc: 'Elecraft Reflector' elecraft@mailman.qth.net, 'Eric Swartz - WA6HHQ, Elecraft' [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain The part that confuses me is the mention that [PowerSDR] fully integrates with the KRX3's main and sub RX frequenciy on its panoramic display. Thats what it does now. But in order for the KRX3 to actually be adding anything you'd have to be listening to its output with the full K3 filter chain. Cause you're not going to correct the dynamic range problems unless you're doing that. Then I don't see how it could allow you to be more than 192KHz/2 away from your main center freq as you'd have to have two sound cards and two IF outputs in order to pull that off. I guess I don't really see a SubRX adding much to the PowerSDR setup unless you use one RX as a spotter and the other as simply a K3. I think that 2 K3's would be a better setup for that. I see the subRX in the K3 as a way to make the K3 a better unit as a standalone unit. Which I think is one thing that the K3 does really well especially since you can make RTTY/PSK contacts with just a K3 sitting on your desk and nothing else. You can also run it as a contest station for both CW and SSB (once the DVR is out). I find it quite fun how much one can get done without the need to interface it to a computer. Now don't get me wrong I'm a total computer guy and I find it even cooler that while it does all this stuff to not require you to have a computer it also makes is SOOO easy to interface to one when you decide you want to. So I guess all in all color me happy yet still confused as to the KRX3 adding much to a powerSDR setup. ___ 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] VFO A/B mode/filter settings
Seems like there must be an easy way to do this, but I don't seem to know it. Help, please: I want to be able to copy the mode and filter settings from one VFO to the other. For example, I have VFO A set up for narrow-band SSB reception. But when I copy VFO AB, only the frequency is copied. The previous mode and filter settings for VFO B remain. I can see instances where you want this behavior (like monitoring CW with one VFO, SSB with the other), but for many of my purposes, it's a real pain. Any way to change this behavior? Sorry if this is RTFM. 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] K3 Anybody heard anything on the status of KDVR3
I have been advised yesterday evening by Katiegram that it won't be available until late fall. Wow! What a late arrival. I ordered mine on the April the 28th, 2007. ca. 12.00z - quite a delay,if you ask me, but on the other hand I'm very very glad that Wayne Eric haven't rushed the main baby. Maybe I shouldn't wait any longer for the KDVR3 before asking Elecraft to ship the stuff I've got on back order (FM-Filter, second RX, etc.). vy 73 de toby PS: I'm also still awaiting the KPA1500 option... ;-) http://mailman.qth.net/pipermail/elecraft/2007-April/066538.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
Re: [Elecraft] KX1 Q6 question...
Dave, I don't know the exact serial number, but the change has been quite recent. I can state with certainty that the 2SC5739 shipped with KX1 SN 2059. The motivation for the change was to use an RoHS compliant part. Extra benefit is derived by having the plastic tab (note that the shoulder washer should not be used, but it is still being packed with the kit). The 2SC5739 does seem to have higher gain at higher frequencies than the 2SC2166, so your 20 meter output may improve if you change it, but I can offer no guarantees on that, the two devices are quite similar. Should you make the change and find your power output is above 4 watts, reduce the setting of R1 to the 4 watt level. The components in the KX1 PA output stage can be stressed at power levels much in excess of 4 watts. 73, Don W3FPR Dave G. wrote: Can anyone help on the following... At what serial number did the PA (Q6) change from a 2SC2166 to a 2SC5739?? Was there any other reason than getting away from the metal tab?? Better performance?? Or TIA -- Dave G. KK7SS '65 MK III Sprite in Richland, WA The Original Point and Click --- Smith and Wesson ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.9/1583 - Release Date: 7/31/2008 6:17 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] [K3] VFO A/B mode/filter settings
Bill, Tap AB twice. This was introduced several versions of the firmware back. The folks who are operating cross mode do not want the mode transferred, only the frequency, but other situations require that the full contents are copied. So tap once to transfer only the frequency and tap twice to transfer everything. 73, Don W3FPR Bill W5WVO wrote: Seems like there must be an easy way to do this, but I don't seem to know it. Help, please: I want to be able to copy the mode and filter settings from one VFO to the other. For example, I have VFO A set up for narrow-band SSB reception. But when I copy VFO AB, only the frequency is copied. The previous mode and filter settings for VFO B remain. I can see instances where you want this behavior (like monitoring CW with one VFO, SSB with the other), but for many of my purposes, it's a real pain. Any way to change this behavior? Sorry if this is RTFM. ___ 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 6m pre-amp
On Wed, 30 Jul 2008 20:33:53 -0400, Jack Smith wrote: Yes, I have several ferrite core 2.5 mH chokes here, including the Hammond one you mention. There's a significant difference in high frequency performance of the pi wound on ceramic form versus the smaller pi-wound over ferrite and that's one of the things I'm hoping to illustrate in the article. The RFI and Ferrite tutorial on my website includes clear explanations of the nature of ferrite materials from a circuit point of view. You may find it helpful in explaining why your very correct in your analysis. You are welcome to cite it as a reference. http://audiosystemsgroup.com/RFI-Ham.pdf However -- ANY 2.5 mH choke has a good chance of looking capacitive at 50 MHz. 73, Jim Brown K9YC ___ 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: KX1 Q6 question....
Don, Thanks for the reply.. The 2SC5739 does seem to have higher gain at higher frequencies than the 2SC2166, so your 20 meter output may improve if you change it, but I can offer no guarantees on that The plastic tab safety factor was obvious but, of course, I was wondering if there was an improvement in the upper frequency efficiency. Should you make the change and find your power output is above 4 watts, reduce the setting of R1 to the 4 watt level. The components in the KX1 PA output stage can be stressed at power levels much in excess of 4 watts. I will definitely keep tha in mind... on the surface it looks like a simple swap --- the thing to decide is if there is a real noticeable performance improvement... Thanks again... -- Dave G. KK7SS '65 MK III Sprite in Richland, WA The Original Point and Click --- Smith and Wesson ___ 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: [K3] VFO's A/B switching between bands
Amazing what you remember right after hitting the send button. Like putting K3 in the subject. David Wilburn K4DGW David Wilburn wrote: Is it possible to set VFO A to one band, and VFO B to a second band? I recall some discussion about this in the past, but do not remember if it was on a tudo list, or if it will be a limitation. As an example, place VFO A on the 20m band CW mode, and VFO B at a location on the 40m band CW mode. I have done this with other rigs, is there a menu setting I am missing, or a limitation of the rig? I just did a couple of quick searches through the documentation, but I did not see a reference to it. I am using the 2.20 firmware. I see that it is supported with the sub-receiver. It is handy during a contest to set VFO B to another band, and bounce there periodically to check activity / propagation, while CQ'ing. ___ 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 S/N 1327
K3/100 KAT3 KXV3 Ordered March 6, 2008 Katiegram July 18, 2008 Shipped July 23, 2008 Arrived July 30, 2008 in Navarre, FL Mike AI4NS -- View this message in context: http://n2.nabble.com/K3-S-N-1327-tp662638p662638.html Sent from the Elecraft mailing list archive at Nabble.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] K3 6m pre-amp
Jim: Thank you for the reference. Indeed, the self-resonant frequency of the typical small (FT50 size) chokes I've wound are in the 5-10 MHz range, but at 100 MHz some (depending upon the core material) still show enough Z to be useful. For truly wideband 10 KHz - 100 MHz choke action, it's necessary to series two wound with different core material and turns, e.g., 35 turns on Steward 40 material for the 2.5 mH, followed by, e.g., 10 turns on FairRite 43 material for 50 MHz. You have to pay particular attention to the u' and u'' values of the ferrite material and how they change with frequency as this is a case where core loss at high frequencies can be good. Jack K8ZOA Jim Brown wrote: On Wed, 30 Jul 2008 20:33:53 -0400, Jack Smith wrote: Yes, I have several ferrite core 2.5 mH chokes here, including the Hammond one you mention. There's a significant difference in high frequency performance of the pi wound on ceramic form versus the smaller pi-wound over ferrite and that's one of the things I'm hoping to illustrate in the article. The RFI and Ferrite tutorial on my website includes clear explanations of the nature of ferrite materials from a circuit point of view. You may find it helpful in explaining why your very correct in your analysis. You are welcome to cite it as a reference. http://audiosystemsgroup.com/RFI-Ham.pdf However -- ANY 2.5 mH choke has a good chance of looking capacitive at 50 MHz. 73, Jim Brown K9YC ___ 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] 6M Preamp
Wes Haywards has a preamp using BF998 MOSFETs http://www.w7zoi.net/lna50.pdf. The PDF is a 50MHz preamp and instructions to build one ugly style. The MOSFET's will cost you $1.25 for about 20-30 of them. Just another option for a 6M preamp Mike AI4NS -- View this message in context: http://n2.nabble.com/6M-Preamp-tp662642p662642.html Sent from the Elecraft mailing list archive at Nabble.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] Re: [K3] VFO's A/B switching between bands
Based on this, I thought it might be on the Tudo list. But then I recall a firmware fix that addressed a cross-band problem. So I'm not sure if they are addressing that issue, or the using A/B between bands issue. http://n2.nabble.com/K3%3A-VFO-B-follows-band-changes-on-VFO-A-td466460.html David Wilburn K4DGW 'Never argue with an idiot. They drag you down to their level then beat you with experience.' - author anonymous S Sacco wrote: David - As you say, it is supported with the sub-receiver. You answered your own question. The next question is: Is it worth $500 for this feature?. So far, I've decided against...but then again, I have two K3's, and have them set up so that the 2nd K3 can on any band the 1st K3 is not on. 73, Steve On 7/31/08, David Wilburn [EMAIL PROTECTED] wrote: Amazing what you remember right after hitting the send button. Like putting K3 in the subject. David Wilburn K4DGW David Wilburn wrote: Is it possible to set VFO A to one band, and VFO B to a second band? I recall some discussion about this in the past, but do not remember if it was on a tudo list, or if it will be a limitation. As an example, place VFO A on the 20m band CW mode, and VFO B at a location on the 40m band CW mode. I have done this with other rigs, is there a menu setting I am missing, or a limitation of the rig? I just did a couple of quick searches through the documentation, but I did not see a reference to it. I am using the 2.20 firmware. I see that it is supported with the sub-receiver. It is handy during a contest to set VFO B to another band, and bounce there periodically to check activity / propagation, while CQ'ing. ___ 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] VFO's A/B switching between bands
Is it possible to set VFO A to one band, and VFO B to a second band? I recall some discussion about this in the past, but do not remember if it was on a tudo list, or if it will be a limitation. As an example, place VFO A on the 20m band CW mode, and VFO B at a location on the 40m band CW mode. I have done this with other rigs, is there a menu setting I am missing, or a limitation of the rig? I just did a couple of quick searches through the documentation, but I did not see a reference to it. I am using the 2.20 firmware. I see that it is supported with the sub-receiver. It is handy during a contest to set VFO B to another band, and bounce there periodically to check activity / propagation, while CQ'ing. -- David Wilburn K4DGW ___ 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: pseudo KRX3 free via LP-Pan+Power SDR
Ok then... This is pretty much exactly what I expected and makes perfect sense. Thanks Larry... I have to admit that after seeing that video that the LP-PAN/PowerSDR kit is more than I'd originally thought but you do have to give up a bit in order to use it that way. Cool thing is that you only give it up while you operate in that fashion. As soon as you go back to using the rig directly and using the panadapter as a panadapter (rather than a lot of the rig) all of the K3 happiness is back. Very cool gentlemen! Its exciting to see how quickly people are jumping on to make products for the K3 that work so well so soon! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry Phipps Sent: Thursday, July 31, 2008 8:25 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3: pseudo KRX3 free via LP-Pan+Power SDR I think what Eric is saying is that if you watch PowerSDR and listen to the K3 / KRX3, it will be a super combination. You will be able to see the passbands of both VFO A and VFO B frequencies and tune either one from the K3 or pan display, as long as the sub-receiver is tuned to within +/- 90kHz of the main receiver. There are some good reasons why listening to the K3 / KRX3 is desirable, especially for CW (and why the K3 blows the doors off the Flex Radios for CW). The main ones are the latency of the DSP processing in PowerSDR, and the serial interface of the K3. Under extreme contest situations, the added protection of the HAGC will be needed, and on the higher bands (10,6m), the K3 has more usable sensitivity because the transfer loss at the K3 IF output port adds to the NF of the panadapter. And the KRX3 allows cross band listening, more filter slots, etc. But many non-contesters will find that using the sub receiver in PowerSDR will be a viable option, especially in SSB. PowerSDR is no slouch when it comes to IMD and BDR, and has excellent DSP filtering. Up to about S9 + 65dB (K3 preamp off) the BDR is comparable to the K3 at spacings down to less than 1 kHz. Of course, in both cases transmitter IMD will be a bigger problem than BDR anyway. Either way, the operational flexibility of the panadapter in split mode is a killer feature. Being able to see holes in a pileup and click on them, or quickly jump to the frequency of the last guy who was answered will be invaluable. When full VFO B support is released in a couple weeks, I'll have some beta testers with KRX3s in hand, and I can get some comparative feedback. Larry N8LP Date: Wed, 30 Jul 2008 22:19:10 -0700 From: Brett Howard [EMAIL PROTECTED] Subject: RE: [Elecraft] K3: pseudo KRX3 free via LP-Pan+Power SDR To: [EMAIL PROTECTED] Cc: 'Elecraft Reflector' elecraft@mailman.qth.net, 'Eric Swartz - WA6HHQ, Elecraft' [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain The part that confuses me is the mention that [PowerSDR] fully integrates with the KRX3's main and sub RX frequenciy on its panoramic display. Thats what it does now. But in order for the KRX3 to actually be adding anything you'd have to be listening to its output with the full K3 filter chain. Cause you're not going to correct the dynamic range problems unless you're doing that. Then I don't see how it could allow you to be more than 192KHz/2 away from your main center freq as you'd have to have two sound cards and two IF outputs in order to pull that off. I guess I don't really see a SubRX adding much to the PowerSDR setup unless you use one RX as a spotter and the other as simply a K3. I think that 2 K3's would be a better setup for that. I see the subRX in the K3 as a way to make the K3 a better unit as a standalone unit. Which I think is one thing that the K3 does really well especially since you can make RTTY/PSK contacts with just a K3 sitting on your desk and nothing else. You can also run it as a contest station for both CW and SSB (once the DVR is out). I find it quite fun how much one can get done without the need to interface it to a computer. Now don't get me wrong I'm a total computer guy and I find it even cooler that while it does all this stuff to not require you to have a computer it also makes is SOOO easy to interface to one when you decide you want to. So I guess all in all color me happy yet still confused as to the KRX3 adding much to a powerSDR setup. ___ 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:
RE: [Elecraft] [K3] VFO A/B mode/filter settings
Press the button twice in quick succession. The first press copies only the freq the second press with in I think 3 seconds copies all information across. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill W5WVO Sent: Thursday, July 31, 2008 8:36 AM To: [Elecraft] Subject: [Elecraft] [K3] VFO A/B mode/filter settings Seems like there must be an easy way to do this, but I don't seem to know it. Help, please: I want to be able to copy the mode and filter settings from one VFO to the other. For example, I have VFO A set up for narrow-band SSB reception. But when I copy VFO AB, only the frequency is copied. The previous mode and filter settings for VFO B remain. I can see instances where you want this behavior (like monitoring CW with one VFO, SSB with the other), but for many of my purposes, it's a real pain. Any way to change this behavior? Sorry if this is RTFM. 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 ___ 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 6m pre-amp
When you wire two chokes of different value in series, you almost always get a series-resonant hole in the attenuation somewhere between the parallel-resonant frequencies of the two chokes. It's not hard to see why that's true if you model each choke as an ideal inductor in parallel with a capacitor. So you need to design the combination so that the series-resonant frequency falls somewhere unimportant. Al N1AL On Thu, 2008-07-31 at 09:14, Jack Smith wrote: Jim: Thank you for the reference. Indeed, the self-resonant frequency of the typical small (FT50 size) chokes I've wound are in the 5-10 MHz range, but at 100 MHz some (depending upon the core material) still show enough Z to be useful. For truly wideband 10 KHz - 100 MHz choke action, it's necessary to series two wound with different core material and turns, e.g., 35 turns on Steward 40 material for the 2.5 mH, followed by, e.g., 10 turns on FairRite 43 material for 50 MHz. You have to pay particular attention to the u' and u'' values of the ferrite material and how they change with frequency as this is a case where core loss at high frequencies can be good. Jack K8ZOA Jim Brown wrote: On Wed, 30 Jul 2008 20:33:53 -0400, Jack Smith wrote: Yes, I have several ferrite core 2.5 mH chokes here, including the Hammond one you mention. There's a significant difference in high frequency performance of the pi wound on ceramic form versus the smaller pi-wound over ferrite and that's one of the things I'm hoping to illustrate in the article. The RFI and Ferrite tutorial on my website includes clear explanations of the nature of ferrite materials from a circuit point of view. You may find it helpful in explaining why your very correct in your analysis. You are welcome to cite it as a reference. http://audiosystemsgroup.com/RFI-Ham.pdf However -- ANY 2.5 mH choke has a good chance of looking capacitive at 50 MHz. 73, Jim Brown K9YC ___ 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 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 6m pre-amp
Indeed such is the case, and it is quite pronounced with high Q inductors. You may wish, however, to model and/or measure two series chokes when both are wound on lossy ferrite material. The response looks quite different. The resistance in parallel with the inductors radically modifies the response when the material causes the inductor Q to be 1. I'll E-mail you some early measurements and a quick simulation plots. Jack K8ZOA Alan Bloom wrote: When you wire two chokes of different value in series, you almost always get a series-resonant hole in the attenuation somewhere between the parallel-resonant frequencies of the two chokes. It's not hard to see why that's true if you model each choke as an ideal inductor in parallel with a capacitor. So you need to design the combination so that the series-resonant frequency falls somewhere unimportant. Al N1AL On Thu, 2008-07-31 at 09:14, Jack Smith wrote: Jim: Thank you for the reference. Indeed, the self-resonant frequency of the typical small (FT50 size) chokes I've wound are in the 5-10 MHz range, but at 100 MHz some (depending upon the core material) still show enough Z to be useful. For truly wideband 10 KHz - 100 MHz choke action, it's necessary to series two wound with different core material and turns, e.g., 35 turns on Steward 40 material for the 2.5 mH, followed by, e.g., 10 turns on FairRite 43 material for 50 MHz. You have to pay particular attention to the u' and u'' values of the ferrite material and how they change with frequency as this is a case where core loss at high frequencies can be good. Jack K8ZOA Jim Brown wrote: On Wed, 30 Jul 2008 20:33:53 -0400, Jack Smith wrote: Yes, I have several ferrite core 2.5 mH chokes here, including the Hammond one you mention. There's a significant difference in high frequency performance of the pi wound on ceramic form versus the smaller pi-wound over ferrite and that's one of the things I'm hoping to illustrate in the article. The RFI and Ferrite tutorial on my website includes clear explanations of the nature of ferrite materials from a circuit point of view. You may find it helpful in explaining why your very correct in your analysis. You are welcome to cite it as a reference. http://audiosystemsgroup.com/RFI-Ham.pdf However -- ANY 2.5 mH choke has a good chance of looking capacitive at 50 MHz. 73, Jim Brown K9YC ___ 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 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 6m pre-amp
I've been looking for a pair of RFC's to bleed the static off of my parallel feedline to ground. Have a couple of resistors, but would prefer a lower resistance DC path to ground. The antenna is used for the 160 through 6 meter ham bands and general coverage receiving so having something that would have a high impedance from 10 kHz to 100 MHz would be great. Would this type of choke be suitable? Darrell VA7TO K2 #5093 On Thursday 31 July 2008 09:14, Jack Smith wrote: Jim: Thank you for the reference. Indeed, the self-resonant frequency of the typical small (FT50 size) chokes I've wound are in the 5-10 MHz range, but at 100 MHz some (depending upon the core material) still show enough Z to be useful. For truly wideband 10 KHz - 100 MHz choke action, it's necessary to series two wound with different core material and turns, e.g., 35 turns on Steward 40 material for the 2.5 mH, followed by, e.g., 10 turns on FairRite 43 material for 50 MHz. You have to pay particular attention to the u' and u'' values of the ferrite material and how they change with frequency as this is a case where core loss at high frequencies can be good. Jack K8ZOA Jim Brown wrote: On Wed, 30 Jul 2008 20:33:53 -0400, Jack Smith wrote: Yes, I have several ferrite core 2.5 mH chokes here, including the Hammond one you mention. There's a significant difference in high frequency performance of the pi wound on ceramic form versus the smaller pi-wound over ferrite and that's one of the things I'm hoping to illustrate in the article. The RFI and Ferrite tutorial on my website includes clear explanations of the nature of ferrite materials from a circuit point of view. You may find it helpful in explaining why your very correct in your analysis. You are welcome to cite it as a reference. http://audiosystemsgroup.com/RFI-Ham.pdf However -- ANY 2.5 mH choke has a good chance of looking capacitive at 50 MHz. 73, Jim Brown K9YC ___ 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 -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada ___ 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 6m pre-amp
Good point. That's why ferrite beads make good parasitic suppressors - at VHF frequencies they act more like resistors than inductors. Where I ran into this problem was trying to come up with a plate choke for a kilowatt amplifier that would work from 1.8 to 19.7 MHz. The high inductance needed for the 160 meter band pretty much guaranteed poor performance at 10 meters. I couldn't make the choke lossy because it would burn up at those power levels. The solution was to use two chokes in series and select values that resulted in a series resonance that fell safely in between amateur bands. Al N1AL On Thu, 2008-07-31 at 10:34, Jack Smith wrote: Indeed such is the case, and it is quite pronounced with high Q inductors. You may wish, however, to model and/or measure two series chokes when both are wound on lossy ferrite material. The response looks quite different. The resistance in parallel with the inductors radically modifies the response when the material causes the inductor Q to be 1. I'll E-mail you some early measurements and a quick simulation plots. Jack K8ZOA Alan Bloom wrote: When you wire two chokes of different value in series, you almost always get a series-resonant hole in the attenuation somewhere between the parallel-resonant frequencies of the two chokes. It's not hard to see why that's true if you model each choke as an ideal inductor in parallel with a capacitor. So you need to design the combination so that the series-resonant frequency falls somewhere unimportant. Al N1AL On Thu, 2008-07-31 at 09:14, Jack Smith wrote: Jim: Thank you for the reference. Indeed, the self-resonant frequency of the typical small (FT50 size) chokes I've wound are in the 5-10 MHz range, but at 100 MHz some (depending upon the core material) still show enough Z to be useful. For truly wideband 10 KHz - 100 MHz choke action, it's necessary to series two wound with different core material and turns, e.g., 35 turns on Steward 40 material for the 2.5 mH, followed by, e.g., 10 turns on FairRite 43 material for 50 MHz. You have to pay particular attention to the u' and u'' values of the ferrite material and how they change with frequency as this is a case where core loss at high frequencies can be good. Jack K8ZOA Jim Brown wrote: On Wed, 30 Jul 2008 20:33:53 -0400, Jack Smith wrote: Yes, I have several ferrite core 2.5 mH chokes here, including the Hammond one you mention. There's a significant difference in high frequency performance of the pi wound on ceramic form versus the smaller pi-wound over ferrite and that's one of the things I'm hoping to illustrate in the article. The RFI and Ferrite tutorial on my website includes clear explanations of the nature of ferrite materials from a circuit point of view. You may find it helpful in explaining why your very correct in your analysis. You are welcome to cite it as a reference. http://audiosystemsgroup.com/RFI-Ham.pdf However -- ANY 2.5 mH choke has a good chance of looking capacitive at 50 MHz. 73, Jim Brown K9YC ___ 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 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: Problems with K3 KXV3 IF Output Level?
Hi Jack, Lyle was referring to tracking of signal levels (i.e. level changes), not absolute gain. In our case, the IF output was designed specifically for internal use by a possible future Elecraft option and fully meets our design needs in this area. It has sufficient signal for this use and clearly works with other external devices that are designed to handle these levels, as noted by Lyle. We were very concerned about having an overly strong IF signal inside the K3 and kept this level as low as possible to avoid additional RX and TX spur generation inside the radio. Our intent was to have it amplified by an external, higher input impedance, amplifier as noted in your email. Regards, Eric Jack Smith wrote: Lyle: As we have discussed, the K3 does not follow the normal commercial/military practice of providing a 1:1 relationship between the IF sample and the signal level at the antenna port. Since the K3 has a switchable pre-amp, the 1:1 relationship would presumably be with the pre-amp off. .. Now, a Softrock or Larry's LP-PAN has enough sensitivity to overcome most or all of this loss, but it's still a design error. (The IF sample can also be amplified by an external amplifier such as my Z1-U. If configured in high Z input mode, the J310's output impedance becomes a non-issue.) Jack K8ZOA www.cliftonlaboratories.com Lyle Johnson wrote: ...There is just no tracking of levels at the I F out with what is fed into the antenna input of the receiver. If that were true, LP-PAN, SDR-14 and SDR0IQ could not be used as panadaptors. But they can and are being used, so one can only conclude that the output at the IF jack most assuredly follows the signal at the input. Note that there are a mulititude of signals at the IF output connector since this is the unfiltered output from the mixer post-amplifier. These signals must be accounted for in any device which attaches to the IF output jack. See URL:http://www.telepostinc.com/LP-PAN.html and scroll about halfway down the page to L.O. leakage / isolation: for details The lower the impedance of the attached load, the lower the gain (or increased loss) there will be at the IF output. We're talking microvolt levels here, not hundreds of millivolts. 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] VFO A/B mode/filter settings
I was surprised the first time this 'bit' me. I had forgot about the note to push twice. Works for me. Great stuff, thanks. David Wilburn K4DGW Don Wilhelm wrote: Bill, Tap AB twice. This was introduced several versions of the firmware back. The folks who are operating cross mode do not want the mode transferred, only the frequency, but other situations require that the full contents are copied. So tap once to transfer only the frequency and tap twice to transfer everything. 73, Don W3FPR Bill W5WVO wrote: Seems like there must be an easy way to do this, but I don't seem to know it. Help, please: I want to be able to copy the mode and filter settings from one VFO to the other. For example, I have VFO A set up for narrow-band SSB reception. But when I copy VFO AB, only the frequency is copied. The previous mode and filter settings for VFO B remain. I can see instances where you want this behavior (like monitoring CW with one VFO, SSB with the other), but for many of my purposes, it's a real pain. Any way to change this behavior? Sorry if this is RTFM. ___ 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] RF Chokes (renamed)
This is probably drifting away from Elecraft specific topics, but a quick answer to your question is maybe yes or maybe no. The issue is what happens when one puts large RF voltages across these lossy ferrite-based chokes. In my application, it isn't an issue but it certainly can be as was mentioned earlier in, e.g., a plate choke environment or in your case where high voltage across parallel feed lines is possible. I would be hesitant to use this design across a parallel transmission line without first measuring the impedance of the chokes over the transmitting frequency range and evaluating the expected voltage across the chokes and the consequent power dissipation in the cores. There's also a possible concern with the chokes generating harmonics if driven into or close to magnetic saturation. Sorry to not be able to give a direct answer but it's not a questions permitting a yes or no response. Jack K8ZOA Darrell Bellerive wrote: I've been looking for a pair of RFC's to bleed the static off of my parallel feedline to ground. Have a couple of resistors, but would prefer a lower resistance DC path to ground. The antenna is used for the 160 through 6 meter ham bands and general coverage receiving so having something that would have a high impedance from 10 kHz to 100 MHz would be great. Would this type of choke be suitable? Darrell VA7TO K2 #5093 On Thursday 31 July 2008 09:14, Jack Smith wrote: ___ 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: pseudo KRX3 free via LP-Pan+Power SDR
Only time I would use PowerSDR for listening is when I want AM or FM. I don't have either crystal filter in my K3 and PowerSDR is extemely good on AM receive. Haven't tried FMn, but expect the same there. Also, DRM receive is possible for those who want it. Jerry W4UK At 12:44 PM 7/31/2008, Brett Howard wrote: Ok then... This is pretty much exactly what I expected and makes perfect sense. Thanks Larry... I have to admit that after seeing that video that the LP-PAN/PowerSDR kit is more than I'd originally thought but you do have to give up a bit in order to use it that way. Cool thing is that you only give it up while you operate in that fashion. As soon as you go back to using the rig directly and using the panadapter as a panadapter (rather than a lot of the rig) all of the K3 happiness is back. Very cool gentlemen! Its exciting to see how quickly people are jumping on to make products for the K3 that work so well so soon! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry Phipps Sent: Thursday, July 31, 2008 8:25 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3: pseudo KRX3 free via LP-Pan+Power SDR I think what Eric is saying is that if you watch PowerSDR and listen to the K3 / KRX3, it will be a super combination. You will be able to see the passbands of both VFO A and VFO B frequencies and tune either one from the K3 or pan display, as long as the sub-receiver is tuned to within +/- 90kHz of the main receiver. There are some good reasons why listening to the K3 / KRX3 is desirable, especially for CW (and why the K3 blows the doors off the Flex Radios for CW). The main ones are the latency of the DSP processing in PowerSDR, and the serial interface of the K3. Under extreme contest situations, the added protection of the HAGC will be needed, and on the higher bands (10,6m), the K3 has more usable sensitivity because the transfer loss at the K3 IF output port adds to the NF of the panadapter. And the KRX3 allows cross band listening, more filter slots, etc. But many non-contesters will find that using the sub receiver in PowerSDR will be a viable option, especially in SSB. PowerSDR is no slouch when it comes to IMD and BDR, and has excellent DSP filtering. Up to about S9 + 65dB (K3 preamp off) the BDR is comparable to the K3 at spacings down to less than 1 kHz. Of course, in both cases transmitter IMD will be a bigger problem than BDR anyway. Either way, the operational flexibility of the panadapter in split mode is a killer feature. Being able to see holes in a pileup and click on them, or quickly jump to the frequency of the last guy who was answered will be invaluable. When full VFO B support is released in a couple weeks, I'll have some beta testers with KRX3s in hand, and I can get some comparative feedback. Larry N8LP Date: Wed, 30 Jul 2008 22:19:10 -0700 From: Brett Howard [EMAIL PROTECTED] Subject: RE: [Elecraft] K3: pseudo KRX3 free via LP-Pan+Power SDR To: [EMAIL PROTECTED] Cc: 'Elecraft Reflector' elecraft@mailman.qth.net, 'Eric Swartz - WA6HHQ, Elecraft' [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain The part that confuses me is the mention that [PowerSDR] fully integrates with the KRX3's main and sub RX frequenciy on its panoramic display. Thats what it does now. But in order for the KRX3 to actually be adding anything you'd have to be listening to its output with the full K3 filter chain. Cause you're not going to correct the dynamic range problems unless you're doing that. Then I don't see how it could allow you to be more than 192KHz/2 away from your main center freq as you'd have to have two sound cards and two IF outputs in order to pull that off. I guess I don't really see a SubRX adding much to the PowerSDR setup unless you use one RX as a spotter and the other as simply a K3. I think that 2 K3's would be a better setup for that. I see the subRX in the K3 as a way to make the K3 a better unit as a standalone unit. Which I think is one thing that the K3 does really well especially since you can make RTTY/PSK contacts with just a K3 sitting on your desk and nothing else. You can also run it as a contest station for both CW and SSB (once the DVR is out). I find it quite fun how much one can get done without the need to interface it to a computer. Now don't get me wrong I'm a total computer guy and I find it even cooler that while it does all this stuff to not require you to have a computer it also makes is SOOO easy to interface to one when you decide you want to. So I guess all in all color me happy yet still confused as to the KRX3 adding much to a powerSDR setup. ___ 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
RE: [Elecraft] RF Chokes (renamed)
I've been looking for a pair of RFC's to bleed the static off of my parallel feedline to ground. Have a couple of resistors, but would prefer a lower resistance DC path to ground. The antenna is used for the 160 through 6 meter ham bands and general coverage receiving so having something that would have a high impedance from 10 kHz to 100 MHz would be great. Would this type of choke be suitable? Darrell VA7TO K2 #5093 - I'll add to Jack's comments that, whatever choke you use, it is important that they have *no* series resonances on any frequency of interest. A choke exhibiting a series resonance becomes an RF dead short at that frequency. Virtually *all* chokes show series resonances. That's why non-inductive resistors are generally used to bleed the static off of an antenna. (That's not for lightning grounding, of course, but just to avoid the build up of snow and rain static that can cause QRN in a receiver). Where wide frequency ranges are needed, such as in the high-impedance plate circuits of vacuum tube amplifiers, you'll normally see what amounts to several chokes in series. The first one will have relatively few turns for adequate inductance at the highest frequency, the next choke (or section of one choke) will have more turns, etc. That way, there is still adequate inductance even when one of the sections hits a series resonance. Ron AC7AC ___ 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: [K3] VFO's A/B switching between bands
Just to clarify, I am asking about using one VFO on one band and the other VFO on another band. Same antenna. No need for a second RX. Historically this has been a basic capability of transceivers like the IC-706MKIIG. I do not expect to hear from both VFO's at the same time. Its an either or thing. VFO A on 20m, VFO B on 40m, hit the A/B switch to toggle between the two. Check and see what is going on, on 40m. The choices that I see are; This is on the list. If so, no problem, I can wait. This is not, and will not be a capability of this radio. I have missed a menu setting that will let me do this. None of the above. David Wilburn K4DGW David Wilburn wrote: Based on this, I thought it might be on the Tudo list. But then I recall a firmware fix that addressed a cross-band problem. So I'm not sure if they are addressing that issue, or the using A/B between bands issue. http://n2.nabble.com/K3%3A-VFO-B-follows-band-changes-on-VFO-A-td466460.html David Wilburn K4DGW 'Never argue with an idiot. They drag you down to their level then beat you with experience.' - author anonymous S Sacco wrote: David - As you say, it is supported with the sub-receiver. You answered your own question. The next question is: Is it worth $500 for this feature?. So far, I've decided against...but then again, I have two K3's, and have them set up so that the 2nd K3 can on any band the 1st K3 is not on. 73, Steve On 7/31/08, David Wilburn [EMAIL PROTECTED] wrote: Amazing what you remember right after hitting the send button. Like putting K3 in the subject. David Wilburn K4DGW David Wilburn wrote: Is it possible to set VFO A to one band, and VFO B to a second band? I recall some discussion about this in the past, but do not remember if it was on a tudo list, or if it will be a limitation. As an example, place VFO A on the 20m band CW mode, and VFO B at a location on the 40m band CW mode. I have done this with other rigs, is there a menu setting I am missing, or a limitation of the rig? I just did a couple of quick searches through the documentation, but I did not see a reference to it. I am using the 2.20 firmware. I see that it is supported with the sub-receiver. It is handy during a contest to set VFO B to another band, and bounce there periodically to check activity / propagation, while CQ'ing. ___ 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 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 USB interface
-- ___ Surf the Web in a faster, safer and easier way: Download Opera 9 at http://www.opera.com Powered by Outblaze ___ 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 USB interface
When using the K2 with PSK I use the computer 9-pin serial port for the PTT. With only one serial port I then lose the digital read-out from the K2 into my logging program (LOG-EQF). Is there any published advice on connecting the K2 digital output to a USB port? thanks Robert (g0who) -- ___ Surf the Web in a faster, safer and easier way: Download Opera 9 at http://www.opera.com Powered by Outblaze ___ 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] Beta 2.22 and Noise Reduction problem
Just finished installing the 2.22 beta. Took the rig back to the shack and ran through the various controls I use the most often. No problem with the Noise Blanker but the Noise Reduction does not work now. I went through every menu I could find, and KNB3 is ON and seems to work ok. I couldn't find any menu choices for the NR function though. Whether I tap or hold the NR button, all I get is N/A. Have I missed something or is there a bug in this beta? Thanks and 73 Bob N6WG ___ 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 ESSB
Hi All, Has anyone discovered when this firmware feature will be released? Last I heard from Elecraft it was being worked on and was possible that it would be released at the end of July. Gay K3/100 #679 -- Stokers...we get ya goin' ___ 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] Canceled my K3, bummer.
Gary D Krause wrote: I canceled my K3 order. With the price of food and fuel along with everything else, I figured it would be smart to hold off for now. The good news is that I still have my K2 which is a terrific rig and I'm guessing that everyone else gets bumped up another notch! Hmmm ... you could have taken your K3 slot in the queue, bundled it with others who need to cancel, create a group of K3 Backed Securities, used them as collateral for a bond issue, and then bought a slot back, getting the original K3 and all the while feeding your family and fueling the car. After all, it worked just super with mortgages. 73, Fred K6DGW - Northern California Contest Club - CU in the 2008 Cal QSO Party 4-5 Oct 08 - www.cqp.org ___ 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] Beta 2.22 and Noise Reduction problem
Bob, Are you possibly in DATA or FM mode? The NR function is not available in those modes, hence the N/A display. I have 2.22 loaded and have no similar problem with the NR in CW, SSB or AM modes. 73, Don W3FPR. Bob Tellefsen wrote: Just finished installing the 2.22 beta. Took the rig back to the shack and ran through the various controls I use the most often. No problem with the Noise Blanker but the Noise Reduction does not work now. I went through every menu I could find, and KNB3 is ON and seems to work ok. I couldn't find any menu choices for the NR function though. Whether I tap or hold the NR button, all I get is N/A. Have I missed something or is there a bug in this beta? Thanks and 73 ___ 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] Beta 2.22 and Noise Reduction problem
Hi Don As usual, it turned out to be very simple. Just neglected to check the AGC ON. Once I changed it, all was well. Thanks and 73 Bob N6WG - Original Message - From: Don Wilhelm [EMAIL PROTECTED] To: Bob Tellefsen [EMAIL PROTECTED] Cc: Reflector Elecraft elecraft@mailman.qth.net Sent: Thursday, July 31, 2008 5:07 PM Subject: Re: [Elecraft] Beta 2.22 and Noise Reduction problem Bob, Are you possibly in DATA or FM mode? The NR function is not available in those modes, hence the N/A display. I have 2.22 loaded and have no similar problem with the NR in CW, SSB or AM modes. 73, Don W3FPR. Bob Tellefsen wrote: Just finished installing the 2.22 beta. Took the rig back to the shack and ran through the various controls I use the most often. No problem with the Noise Blanker but the Noise Reduction does not work now. I went through every menu I could find, and KNB3 is ON and seems to work ok. I couldn't find any menu choices for the NR function though. Whether I tap or hold the NR button, all I get is N/A. Have I missed something or is there a bug in this beta? Thanks and 73 ___ 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] Beta 2.22 and Noise Reduction problem
Bob Tellefsen wrote: Just finished installing the 2.22 beta. Took the rig back to the shack and ran through the various controls I use the most often. No problem with the Noise Blanker but the Noise Reduction does not work now. I went through every menu I could find, and KNB3 is ON and seems to work ok. I couldn't find any menu choices for the NR function though. Whether I tap or hold the NR button, all I get is N/A. NR does not work if AGC is OFF. This is because there are some circumstances in which the DSP can be made to oscillate with NR and no AGC. -- 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] Canceled my K3, bummer.
Maybe you could have put your order on hold to keep your spot in the queue and then reactivate when economic condx allow. Maybe too late now, but that was an option earlier this year. Gary W7TEA Gary D Krause wrote: I canceled my K3 order. With the price of food and fuel along with everything else, I figured it would be smart to hold off for now. The good news is that I still have my K2 which is a terrific rig and I'm guessing that everyone else gets bumped up another notch! I still plan to buy a K3, it's just not going to happen as soon as I wanted. Gary, N7HTS ___ 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 -- View this message in context: http://n2.nabble.com/Canceled-my-K3%2C-bummer.-tp662319p663504.html Sent from the Elecraft mailing list archive at Nabble.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] K3 ESSB
Wayne is working on it now. 73, Eric Gary Gregory wrote: Hi All, Has anyone discovered when this firmware feature will be released? Last I heard from Elecraft it was being worked on and was possible that it would be released at the end of July. Gay K3/100 #679 ___ 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 Beginner
I am on the list to receive a basic 10w K3 kit, soon. Evidently, some are using an SDR radio on the IF output for a bandscope? Am I way off, here? Brian -- http://www.qrz.com/callsign?callsign=K7ON ___ 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 USB interface
Robert, You may find the best luck using the USB to serial adapter for PTT control for your PSK application and using the real serial port for communications with the logging application. The PTT control is less critical for timing considerations than the communications done by the logging software. 73, Don W3FPR Robert Clutson wrote: When using the K2 with PSK I use the computer 9-pin serial port for the PTT. With only one serial port I then lose the digital read-out from the K2 into my logging program (LOG-EQF). Is there any published advice on connecting the K2 digital output to a USB port? thanks Robert (g0who) ___ 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 Beginner
Brian The band scope is being done using LP-PAN form Telepost and some have been working on using a Softrock SDR device. The Softrock works, but there are issues with buffering between the K3 and the Softrock SDR. Some have made buffer amps available. I have an SDR Radio tune to the output of the K3, but have yet to have time to get it together with the buffer amp. Mowing the yard in this rainy summer has taken over my life. Lee k0WA In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? ___ 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 ESSB - OT
Ut - oh - more intense development at N6Kr, hide the cats. Supposedly he buried three during the K3 development, although I have no information regarding their specific demise... [Elecraft] K3 ESSB Wayne is working on it now. 73, Eric Gary Gregory wrote: Hi All, Has anyone discovered when this firmware feature will be released? Last I heard from Elecraft it was being worked on and was possible that it would be released at the end of July. Gay K3/100 #679 ___ 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: SOFTWARE SOURCES SOUGHT
Hi to all, I am associated with a company called Global Link Network (GLN). GLN is looking for a software developer that can provide a software module(s) that will interface between a POP3 program (i.e. Microsoft Outlook) and a SCS Pactor high frequency radio modem. If you know of anyone that may be interested, please have them contact me directly and I will furnish them with a statement-of-requirements. Thanks in advance, Harry F. Wetzel 948 Colonial Drive St. Augustine, FL 32086 www.AugTec.com www.W4KRT.com [EMAIL PROTECTED] (904) 794-7452 No virus found in this outgoing message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.10/1584 - Release Date: 7/31/2008 12:00 PM ___ 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 Beginner
Brian, Take a look here: http://www.telepostinc.com/LP-PAN.html Lots of fun so far - ever evolving. I had it working for a few hours today and it holds for a lot of possibilities. Should be practical and cutting edge at this point IMHO. 73, Dave W8FGU -Original Message- From: [EMAIL PROTECTED] [mailto:elecraft- [EMAIL PROTECTED] On Behalf Of Brian Short Sent: Thursday, July 31, 2008 8:31 PM To: Reflector Elecraft Subject: [Elecraft] K3 Beginner I am on the list to receive a basic 10w K3 kit, soon. Evidently, some are using an SDR radio on the IF output for a bandscope? Am I way off, here? Brian -- http://www.qrz.com/callsign?callsign=K7ON ___ 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] K3 6m pre-amp
On Thu, 31 Jul 2008 09:42:16 -0700, Alan Bloom wrote: That's why ferrite beads make good parasitic suppressors - at VHF frequencies they act more like resistors than inductors. EXACTLY! The equivalent circuit of a wire going through a ferrite bead is a low Q parallel resonant circuit. (For some ferrite materials, its two parallel resonant circuits in series.) When we wind multiple turns through or around a core, we increase the capacitance between turns and multiply the inductance and loss by N squared, both of which serve to move the resonance down in frequency and increase the R at resonance. For all practical purposes, Q changes only to the extent that u' and u'' are changing with frequency. Thus, a material like Fair-Rite #43 which for most form factors has a resonance around 200 MHz can provide effective suppression at HF by winding multiple turns through it. The tutorial includes a development of the equivalent circuit (this work is original with me, and was first published in an AES Paper, also on my website). 73, Jim Brown K9YC ___ 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: ESSB firmware released to field testers
I released MCU revision 2.23 to our K3 field-test group earlier this evening, making our promised July deadline for ESSB (Extended Single Sideband). The maximum ESSB transmit bandwidth is about 4 kHz -- this is also the WIDTH control limit in SSB mode for receive purposes. A 6 kHz filter (AM) on the RF board is required to use ESSB, either in RX or TX mode. This revision also includes changes that we hope will eliminate the power output difference between LSB and USB. If all goes well, we'll post revision 2.23 on our web site (as a beta release) on Friday. If you have a 6-kHz filter and would like to get a jump on ESSB testing (which we'd appreciate), please send me an e-mail and I'll send you a .zip file with this firmware revision. 73, Wayne N6KR --- 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] K3: ESSB firmware released to field testers
A 6 kHz filter (AM) on the RF board is required to use ESSB, either in RX or TX mode. What about the FM filter for transmit and receive? It's better than the typical 20 to 40 KHz wide 70 MHz filter in other rigs. 73, ... Joe, W4TV -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of wayne burdick Sent: Friday, August 01, 2008 1:18 AM To: Elecraft Reflector Subject: [Elecraft] K3: ESSB firmware released to field testers I released MCU revision 2.23 to our K3 field-test group earlier this evening, making our promised July deadline for ESSB (Extended Single Sideband). The maximum ESSB transmit bandwidth is about 4 kHz -- this is also the WIDTH control limit in SSB mode for receive purposes. A 6 kHz filter (AM) on the RF board is required to use ESSB, either in RX or TX mode. This revision also includes changes that we hope will eliminate the power output difference between LSB and USB. If all goes well, we'll post revision 2.23 on our web site (as a beta release) on Friday. If you have a 6-kHz filter and would like to get a jump on ESSB testing (which we'd appreciate), please send me an e-mail and I'll send you a .zip file with this firmware revision. 73, Wayne N6KR --- 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 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: K3: ESSB firmware released to field testers
Joe Subich, W4TV wrote: A 6 kHz filter (AM) on the RF board is required to use ESSB, either in RX or TX mode. What about the FM filter for transmit and receive? It's better than the typical 20 to 40 KHz wide 70 MHz filter in other rigs. Hi Joe, We do plan to allow the FM filter to be used for AM and ESSB eventually. But this will require additional firmware changes and a lot of careful testing. I have several other tasks to complete before I can get to it. 73, Wayne N6KR --- 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] CW rise time
According to my friends and according to MP3 files they have made for me, the CW note from my K3 serial number 152 sounds fine. Not as hard as my K2 and not too soft. I see there is a modification to change the rise time from 8 to 5 milliseconds by installing a different capacitor at C222 on the RF board. I wonder what value cap is present in currently shipping K3's? Wonder what people have thought about the change in the CW waveform after changing this capacitor? I know there are those who will say if it ain't broke, don't fix it. But it's the true Elecraft spirit to make something good even better. Please answer off list as well as on as I get the reflector in digest form only. Thanks! Andy W9NJY Milwaukee WI ___ 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
