Re: [Elecraft] K3 Caution when using an external monaural speaker
In a recent message, Ron D'Eau Claire r...@cobi.biz wrote ... The version shown in the app note mimics what Aptos is doing as they modify the boards in inventory. The resistors are in the same place electrically, but they chose to put them on the main KIO3 board instead. Thank you, Ron, for your explanation. I have carried out the mod as in the App note. I was particularly puzzled by the resistor across pins 29 (TXD) 35 of P76 which appears to put the resistor between pin 14 of U1 and ground. I had difficulty in relating this to the original note. 73 -- David G4DMP Leeds, England, UK -- ___ 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] Request for NR and NTCH inside AGC loop
Ignacy Maybe your rig has a problem. NR does not affect the signal strength at all. It does however reduce the audio level, depending on how aggressive the setting is. Regards John G4ZTR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ignacy Sent: 15 January 2009 00:49 To: elecraft@mailman.qth.net Subject: [Elecraft] Request for NR and NTCH inside AGC loop NR seems to be quite effective but especially for weak signals it drops the signal strength by up to 20db. NTCH is also outside the AGC loop. I also suggest the following refinements to NTCH: - faster or adjustable notch time in automatic mode. Now it takes a second and does not work if the carrier is slowly drifting. - adjustable width in manual mode; e.g., can be adjusted by buttons 1-4 For instance 1=20Hz, 2=50 Hz, 3=. The current one is 250HZ and is wide. It may be the same code to put both NR and NTCH into the AGC loop. Would anyone agree that these features will be worthwhile? For me several times NR 3-3 made a difference between a copy and no copy for weak signals but the volume was too low. Ignacy, NO9E -- View this message in context: http://n2.nabble.com/Request-for-NR-and-NTCH-inside-AGC-loop-tp2160153p21601 53.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 __ Information from ESET NOD32 Antivirus, version of virus signature database 3767 (20090115) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 3767 (20090115) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Caution when using an external monaural speaker
In a recent message, David Pratt da...@g4dmp.fsnet.co.uk wrote ... Thank you, Ron, for your explanation. I have carried out the mod as in the App note. I was particularly puzzled by the resistor across pins 29 (TXD) 35 of P76 which appears to put the resistor between pin 14 of U1 and ground. I had difficulty in relating this to the original note. My mistake, chaps, I think I have misinterpreted the pin numbers. They are evidently pins 4 16 of P76 which places the resistor across SPKR R. Sorry! 73 -- David G4DMP Leeds, England, UK -- ___ 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: KXV3, image rejection, be aware!
I have the KXV3 option installed to facilitate my receiving antennas for the low bands: beverages and K9AY loops. Recently I noticed a carrier on 1820.7 kHz, on the frequency of JW/SM0MDG. AM-modulation, sounded Chinees. It was strong on the K9AY loops (all directions) but not that strong on most of the beverages. It started around 07:00 UTC and stopped a few hours later. Some other strange signals could be detected as well, however, to weak to identify the stations. I found out that the interference was from a Chinees broadcast station transmitting on 11855 kHz. This is the image frequency of 1820 kHz (local osc. of the K3 is 10035 kHz). And, on my loops the 11855 kHz signal was very strong, 40-50 dB over S9! The strongest station on that broadcast band. K9AY loops have great bandwidth... Early in the morning, when the 160 meter band is still open to the west, the 12 Mhz broadcast band also opens from the east. So: be aware! In the K3 manual, page 40, the manufacturer makes a statement about this fenomena. I already had a low pass filter, cutt-off at 4 Mhz, solving the problem. My conclusion: Low band dx-ers, using the KXV3 option for receiving antennas such as loops and beverages should consider to insert a low-pass filter to improve the image rejection. Kees, PA0CLN ___ 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 Psk audio connections
Line Out of the sound card goes to Line In on the K3, Line In on the sound card goes to Line Out on the K3. You can use stereo cables as the connectors in the K3 don't use the ring connection and you can't short anything out. K8RDD wrote: I was wondering if anyone knew which is the left and right channels on a pc sound card out to hook to the line in on the K3. Left is A and B is right but which is which on the connector? I assume I use a mono on the K3 side and a stereo connector on the pc side. I'd like to try digi on this beasty. Randy K8RDD -- R. Kevin Stover, ACØH No virus found in this outgoing message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.7/1894 - Release Date: 1/14/2009 7:27 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 Psk audio connections
Randy, There is nothing wrong with using a stereo plug on both ends. You can use an already constructed (purchased) stereo cable - the connector in the K3 is stereo, but wired for mono (that is nothing connected to the ring), so you will not be shorting the soundcard output. If you build your cable, you may wire just the tip and the sleeve. The tip is normally the left channel and the ring is the right channel. 73, Don W3FPR K8RDD wrote: I was wondering if anyone knew which is the left and right channels on a pc sound card out to hook to the line in on the K3. Left is A and B is right but which is which on the connector? I assume I use a mono on the K3 side and a stereo connector on the pc side. I'd like to try digi on this beasty. Randy K8RDD ___ 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 Psk audio connections
Should one be concerned with connecting the K3 stereo line out to a mono (or microphone) input on the PC? Seems like that would short out one channel of the K3 line out. Thanks. KE7X -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of R. Kevin Stover Sent: Thursday, January 15, 2009 6:16 AM To: K8RDD Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Psk audio connections Line Out of the sound card goes to Line In on the K3, Line In on the sound card goes to Line Out on the K3. You can use stereo cables as the connectors in the K3 don't use the ring connection and you can't short anything out. K8RDD wrote: I was wondering if anyone knew which is the left and right channels on a pc sound card out to hook to the line in on the K3. Left is A and B is right but which is which on the connector? I assume I use a mono on the K3 side and a stereo connector on the pc side. I'd like to try digi on this beasty. Randy K8RDD -- R. Kevin Stover, ACØH This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. ___ 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 Psk audio connections
The audio Line-In/Out connections on the KIO3 are not stereo, even though they use a three conductor or stereo jack. The tip is left channel, no connection to ring, and ground on the sleeve. Cady, Fred wrote: Should one be concerned with connecting the K3 stereo line out to a mono (or microphone) input on the PC? Seems like that would short out one channel of the K3 line out. Thanks. KE7X ___ 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 Psk audio connections
I haven't looked at the schematic but on the back of the rig, the line out is marked stereo with the little warning triangle. -Original Message- From: Kevin [mailto:rksto...@mchsi.com] Sent: Thursday, January 15, 2009 7:53 AM To: Cady, Fred Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Psk audio connections The audio Line-In/Out connections on the KIO3 are not stereo, even though they use a three conductor or stereo jack. The tip is left channel, no connection to ring, and ground on the sleeve. Cady, Fred wrote: Should one be concerned with connecting the K3 stereo line out to a mono (or microphone) input on the PC? Seems like that would short out one channel of the K3 line out. Thanks. KE7X This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. ___ 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 Psk audio connections
If the sub rx is installed the ring carries the sub rx audio. - 73, Greg - AB7R Whidbey Island WA NA-065 On Thu Jan 15 6:53 , Kevin sent: The audio Line-In/Out connections on the KIO3 are not stereo, even though they use a three conductor or stereo jack. The tip is left channel, no connection to ring, and ground on the sleeve. Cady, Fred wrote: Should one be concerned with connecting the K3 stereo line out to a mono (or microphone) input on the PC? Seems like that would short out one channel of the K3 line out. Thanks. KE7X ___ 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 Psk audio connections
Fred, No worries, see my posting on the Elecraft reflector at 8:09 this morning. 73, Don W3FPR Cady, Fred wrote: Should one be concerned with connecting the K3 stereo line out to a mono (or microphone) input on the PC? Seems like that would short out one channel of the K3 line out. Thanks. KE7X -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of R. Kevin Stover Sent: Thursday, January 15, 2009 6:16 AM To: K8RDD Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Psk audio connections Line Out of the sound card goes to Line In on the K3, Line In on the sound card goes to Line Out on the K3. You can use stereo cables as the connectors in the K3 don't use the ring connection and you can't short anything out. K8RDD wrote: I was wondering if anyone knew which is the left and right channels on a pc sound card out to hook to the line in on the K3. Left is A and B is right but which is which on the connector? I assume I use a mono on the K3 side and a stereo connector on the pc side. I'd like to try digi on this beasty. Randy K8RDD -- R. Kevin Stover, ACØH This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. ___ 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: 8.0.176 / Virus Database: 270.10.7/1895 - Release Date: 1/15/2009 7:46 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
[Elecraft] K3 on digital modes ;-)
Congratulations to CX7TT for the first ever 6m EME contact from Uruguay! We completed easily this morning on JT65A mode with his 3 element SteppIR during his moonset. I put a photo of his antenna at the bottom of this page: http://www.bigskyspaces.com/w7gj/6mEMEstns.htm MNI TNX Tom for the contact (my DXCC #88 on 6m EME) and for showing how easy it is to use the K3 on JT65A mode ;-) GL and VY 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] Spot - No Spot
Hi Randy: Wayne is aware of reports of this glitch and is attempting to reproduce it on his K3 so he can properly address the problem. In my personal experience, if you 'peck' at the [SPOT] button, you'll usually get only the BEEP, but if you're a bit more 'assertive', (but not so assertive that you HOLD it), pressing the button a bit longer, you'll get both beep and tone... of course, of you over-do things, you'll go into SIDETONE SET mode... G. Thanks, 73, Tom N0SS At 17:19 01/14/2009, Randy Moore wrote: Lately I've noticed that occasionally when I hit SPOT I get the beep and VFO B says SPOT, but there's no tone. It's sometimes hard to reproduce, and may have to do with how quickly I release the button - the quicker I release, the more likely it is to happen. But when it happens, the part of the code that puts SPOT in the VFO B display thinks I'm spotting, but no tone. I'm running the latest beta SW. Not sure when this began to happen... Puzzled, Randy, KS4L K3 #2006, K2 #337 ___ 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 Psk audio connections
OK, guys, here is the real skinny, from the schematics: As shown on the K3 Block Diagram (6/6/07), The DSP RX section provides a two channel AUX AF Out to the KIO3 board. This stereo signal is transformer coupled (see KIO3 Main - Sheet 3) to the Audio IO Board. The KIO3 - Audio Board does indeed show a stereo LINE OUT with the LINEJACK_R on the ring and LINEJACK_L on the tip. The input side of the audio transformers on the KIO3 board have series 600 ohm resistors. Thus it is possible to short the ring to the ground (which worst case could happen even by using a stereo cable between the K3 and a mono Line In or Mic In on a computer, depending on the computer input circuitry and if the computer and K3 grounds are connected). But, due to the transformer coupling in the KIO3, you won't hurt the K3. (Probably) :-) Cheers, Fred Fred Cady fcady at ieee dot org -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: Thursday, January 15, 2009 8:03 AM To: Cady, Fred Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Psk audio connections Fred, No worries, see my posting on the Elecraft reflector at 8:09 this morning. 73, Don W3FPR This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. ___ 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 Psk audio connections
Fred, We *were* talking about the K3 LINE IN (or so I thought). That uses a stereo jack, but is only connected to the tip. For those who need to convince themselves, plug a bare 3.5mm stereo plug into the LINE IN jack and measure the resistance between the ring and ground - you will find it is open circuit (nothing connected, and not grounded). The tip, however has about 640 ohms resistance to ground - that says that one can use an off-the-shelf stereo cable between the computer line out and the K3 line end without concern for either the computer nor the K3. As for the K3 LINE OUT, that is stereo. The main receiver connects to the tip (left channel) and the subRX connects to the ring (right channel). If the sub is not installed, there may be some noise on the right channel, but no sound. The transformer coupling is assurance that no damage will occur if either of the line out channels is shorted to ground. So if one uses a mono cable here, it will cause no damage, but nothing will be heard in the right channel of the soundcard. Most computer soundcards will not be damaged by plugging a mono jack or a stereo jack with the ring grounded into the mic connector. Most soundcards use the ring to provide bias to the electret elements found in many computer mics, so they do apply a voltage to the ring, but it is through a resistor of a value high enough that shorting the ring of the soundcard mic connector should not cause any damage, but then I do not know the particulars of all soundcards - if you are concerned, consult the soundcard manufacturer (if you can!). 73, Don W3FPR Cady, Fred wrote: OK, guys, here is the real skinny, from the schematics: As shown on the K3 Block Diagram (6/6/07), The DSP RX section provides a two channel AUX AF Out to the KIO3 board. This stereo signal is transformer coupled (see KIO3 Main - Sheet 3) to the Audio IO Board. The KIO3 - Audio Board does indeed show a stereo LINE OUT with the LINEJACK_R on the ring and LINEJACK_L on the tip. The input side of the audio transformers on the KIO3 board have series 600 ohm resistors. Thus it is possible to short the ring to the ground (which worst case could happen even by using a stereo cable between the K3 and a mono Line In or Mic In on a computer, depending on the computer input circuitry and if the computer and K3 grounds are connected). But, due to the transformer coupling in the KIO3, you won't hurt the K3. (Probably) :-) Cheers, Fred Fred Cady fcady at ieee dot 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] Request for NR and NTCH inside AGC loop
I am not the first one writing that NTCH is outside the AGC loop and that NR reduces the signal strength. With NR, less on strong signals but much on weak signals. For example, signals that are buried in noise seem to be brought to life with NR 3-3 but the AF gain needs to be all the way up, or more. Ignacy Ignacy Maybe your rig has a problem. NR does not affect the signal strength at all. It does however reduce the audio level, depending on how aggressive the setting is. Regards John G4ZTR -- View this message in context: http://n2.nabble.com/Request-for-NR-and-NTCH-inside-AGC-loop-tp2160153p2163473.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] Filters for weak signal 160 meter CW and crowded contest bands
-Original Message- I wish I could vary the pitch of a signal directly while listening to it, instead of having the sidetone cover it up. 73, Drew AF2Z Me also. I use different pitches depending on what I'm doing. Higher for casual QSOs, lower for contesting pileups. It helps spread out closely packed stations. Ditto the sidetone volume. I require several volume settings depending on which speaker or headphones I'm using and by the time I realize that I have it wrong I'm in the middle of a QSO and can't change it without drowning out either myself or the other station. 73 thanks for listening Carl WS7L K3 #486 ___ 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] Updated Version of K3 AGC Paper
I've made a couple of small changes to my K3 AGC PDF paper and web page. The new version is identified by the 15 January 2009 date and may be downloaded at: http://www.cliftonlaboratories.com/Documents/Elecraft%20K3%20Transceiver%20AGC%20Parameters%20and%20S-meter.pdf The changes are summarized in the Revisions section of the document. Jack K8ZOA www.cliftonlaboratories.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 Audio Thump
Hi, In the interest of protecting the audio amplifier I have just added the two 470 ohm resistors as per the modification. I now get thump on my powered speakers when I power up the K3, or plug in the headphones. I do not recollect this happening before. 73 Tim gm4lmh ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT Tuner Basics
Elecrafters, I know this is off-topic, but the range of ham-smarts on this list is pretty good so I'll throw the question here and hopefully get some of that ham-smarts too. OK -- K3/100 with KAT3 is the rig. I have it connected through a tuner and then to the SB-200 and then Dipole K3/100/ATU - MFJ tuner - SB200 - Dipole If I use Auto mode on the KAT3, put the MFJ tuner in Bypass and hold TUNE then the KAT3 goes and brings the SWR (according to the display) to a favorable value (1.0 to 1.2). I use a MFJ tuner between my Rig and Amp because the Old Bard told me to. Actually my setup is different than what I just described, but I'm simplifying this for the question at hand. [ What I really do is K3 - Small MFJ Tuner - SB200 - Big MFJ Tuner - Dipole ] On the watt meter of the (small) MFJ Tuner, the indication is I have a non favorable SWR, more reflected power than had I put the KAT3 in bypass and manually tuned the MFJ Tuner to a favorable SWR (1.0 to 1.2 or so). So, can someone explain in basic terms what's happening when I use Auto mode on the KAT3 and see favorable SWR on the KAT3 (via K3 display) but do not see favorable SWR on the MFJ tuner? This is not a round-about way of expressing a problem with the K3. On the contrary - I couldn't be more pleased with the KAT3 performance and so forth. I'm asking this question as a data-point before I decide to build the KAT2 for my finished K2. Thanks in advance, -jeff -- Jeff Wandling DE W7BRS K3 #2105 http://w7brs.com/k3 k3u...@w7brs.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] Condx
Hi All, Condx do seem to be very selective these days. The bands will sound dead as a doornail one minute, and then some signal will come out of the woodwork. 20 meters has had some short, but decent, openings here mid to late morning, and then it seems to die. 40 meters is usually best here in the early morning. Much of Asia and the south pacific comes in early here, but I haven't heard all that much from ZL/VK. I suggest you listen around 1300Z (a bit earlier perhaps on the east coast). You are very apt to hear JA1NUT, who seems to get on nearly every day, and with an outstanding signal. I tend to use him for a beacon as to how the band is doing. I've worked him with everything from 1 watt to 100 watts over the last several weeks, but if he's not S9+, I know the band is not in great shape. I'm not hearing much of anything above 20 meters. Afternoon openings to Europe on 40 haven't been very good, but I have heard a few good signals from Africa. Also, I keep hearing stations in Texas (probably with good antennas) knocking of Europe contacts with good reports. Obviously my antenna could use some improvement. The SFI moved all the way from 69 to 70 recently! There just doesn't seem to be much good news in the propagation reports. However, even with pitiful numbers like that, you can snag a couple of contacts if you happen to be listening at the right time. Dave W7AQK - Original Message - From: Tim To: Chuck - AE4CW Cc: elecraft@mailman.qth.net Sent: Wednesday, January 14, 2009 8:25 PM Subject: Re: [Elecraft] Condx Chuck et. al., Yes, 20m was really sparse today EXCEPT I worked a YS3 (a new one for me) at around 2100z and a JH9 at 2300Z with my K3 @ 5 watts cw to an inverted L. Sometimes weird (and poor ) condx can be surprising! Tim K5OI Ruidoso, NM On Wed, Jan 14, 2009 at 8:08 PM, Chuck - AE4CW ae...@att.net wrote: Yes, 20m seems highly variable the last few days, but between 14:00 and 15:00 UTC today, I managed seven stations on SSB over a big chuck of Europe and bypassed a number of Italians. Later in the day Liberia and Brazil came up. Not too impressive but better than I've heard in a few days. The antenna was a Cushcraft R5 vertical, not the strongest, and 100 watts in an S6-7 noise environment. Chuck, AE4CW -- ___ 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] OT Tuner Basics (correction)
Correction: The button I push to invoke the Auto tuner on the K3, is ATU TUNE, not TUNE. I mis-typed. I meant ATU TUNE. Also, there is only one ATU in the scenario -- the KAT3. The MFJ tuners are not ATUs. Thanks. -jeff -- Jeff Wandling DE W7BRS K3 #2105 http://w7brs.com/k3 k3u...@w7brs.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] OT Tuner Basics
So, can someone explain in basic terms what's happening when I use Auto mode on the KAT3 and see favorable SWR on the KAT3 (via K3 display) but do not see favorable SWR on the MFJ tuner? In order for an SWR meter to read the matched condition properly, it must be between the tuner and the rig. Your small MFJ is between the tuner (KAT3) and the antenna (or amplifier), so it is on the wrong side of the tuner. I use the KAT3 and an external balun. Even though there is a short run of coax connecting the K3 and the balun, I cannot use my external power/SWR meter there when using the built-in tuner because it is outside the part of the circuit that is being matched by the tuner. I once thought about adding another coax connecter to get the external power meter in between the rig and the KAT3 tuner, but now I am used to the K3's SWR and power meters and am fine with it. 73, John W2XS -- View this message in context: http://n2.nabble.com/OT-Tuner-Basics-tp2163674p2163862.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 Beta firmware rev. 2.78: Sign-on banner and misc. improvements
With the 1.2.1.6 K3 Utility for OSX I get the message that I have the newest firmware although it is 02.73. Does anyone have a direct link to download 02.78? -- View this message in context: http://n2.nabble.com/K3-Beta-firmware-rev.-2.78%3A-%22Sign-on-banner%22-and-misc.-improvements-tp2131207p2163868.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
[Elecraft] K3 pwr out on digimodes
I do not have the benefit of an external wattmeter at the moment and frequently use digital modes, esp. JT65A. Assuming I want to transmit 25 W or less, if I have PWR set at 25 and adjust the mic gain for ALC just under 1 bar (basically just until one bar disappears), approximately how much power would be transmitted? The resolution of the 100W rf scale doesn't really help at low levels. ___ 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 Sidetone volume
Carl said: .. sidetone volume. I require several volume settings depending on which speaker or headphones I'm using and by the time I realize that I have it wrong I'm in the middle of a QSO and can't change it without drowning out either myself or the other station. 73 thanks for listening Carl WS7L K3 #486 Yes! I want very much to be able to adjust the sidetone volume without actually creating sidetone. I hate to wake the rest of the household trying to turn down the sidetone volume that I was trying to turn down to avoid waking the rest of the household. 73, john WA1ABI K3 #795 ___ 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 Beta firmware rev. 2.78: Sign-on banner and misc. improvements
The direct link is: ftp://ftp.elecraft.com/K3/firmware/beta/ 73 Dave, G4AON K3/100 #80 With the 1.2.1.6 K3 Utility for OSX I get the message that I have the newest firmware although it is 02.73. Does anyone have a direct link to download 02.78? ___ 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] OT Tuner Basics
On Thu, 15 Jan 2009 09:15:36 -0800 (PST), you wrote: [snip] Comments in line... I have it connected through a tuner and then to the SB-200 and then Dipole K3/100/ATU - MFJ tuner - SB200 - Dipole If I use Auto mode on the KAT3, put the MFJ tuner in Bypass and hold TUNE then the KAT3 goes and brings the SWR (according to the display) to a favorable value (1.0 to 1.2). I use a MFJ tuner between my Rig and Amp because the Old Bard told me to. Actually my setup is different than what I just described, but I'm simplifying this for the question at hand. [ What I really do is K3 - Small MFJ Tuner - SB200 - Big MFJ Tuner - Dipole ] I don't know why the Old Bard told you to do that. It makes no sense to me. First of all take the small MFJ tuner out of the line and connect the K3 directly to the SB200. The tuner in the K3 will do the job of the small MFJ tuner. No sense adding tuner loss between the Amp and the rig. I suspect the Old Bard told you that because the input of the SB200 is not 50 ohms. More about that later... On the watt meter of the (small) MFJ Tuner, the indication is I have a non favorable SWR, more reflected power than had I put the KAT3 in bypass and manually tuned the MFJ Tuner to a favorable SWR (1.0 to 1.2 or so). This indicates that the SB200 input is not 50 ohms. You may have some troubles with the SB200 input, but you should be able to adjust that. Look at the SB200 manual and see if it has input matching adjustments. You certainly don't need two tuners for the SB200 input! So, can someone explain in basic terms what's happening when I use Auto mode on the KAT3 and see favorable SWR on the KAT3 (via K3 display) but do not see favorable SWR on the MFJ tuner? Here's what is going on. In the configuration you have now, you are correcting the mismatch between the small tuner and the K3. When you remove the small tuner you will be seeing the input of the large tuner (If you have the amp turned off or in standby.) When you use a tuner on an antenna, you don't change the antenna, you change what the rig sees at the feed end of the coax. I have an amplifier and large tuner. Here is what I do when using an antenna that doesn't have a good match. 1. Put the K3 in tune (hold the XMIT button). Adjust the large tuner connected to the output of the Amplifier for the lowest SWR. You want the amp turned off or in standby at this point. 2. Turn off the tune on the K3. 3. Make sure the power setting on the K3 is set below the normal drive power of the Amp. 4. Turn the amp on or take it out of standby. Hold the XMIT button in on the K3 and adjust the amplifier's tune and load according to the manual that came with it. Your K3 tune level should be about 15 or 20 watts or something below the full output drive of the amp. Turn off the K3 tune. 5. If, and only if you saw a high SWR on the K3 meter, tap the ATU Tune button and tune the K3 to the input of the amp. 6. Hold your CW key or what ever your using to send input power to the amp and adjust the amp tune and load for the output you want from it. Now you're good to go :o) 73, Tom, N5GE http://www.n5ge.com http://www.swotrc.net [snip] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Updated Version of K3 AGC Paper
That's good information presented very clearly. Thanks, Jack. Tom, ak2b ___ 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 Beta firmware rev. 2.78: Sign-on banner and misc. improvements
MCU revision 2.78 is a Beta release. Instructions for installing K3 Beta firmware are on http://www.elecraft.com/K3/k3_software.htm Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of LB3SA Sent: Thursday, January 15, 2009 9:53 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Beta firmware rev. 2.78: Sign-on banner and misc. improvements With the 1.2.1.6 K3 Utility for OSX I get the message that I have the newest firmware although it is 02.73. Does anyone have a direct link to download 02.78? -- View this message in context: http://n2.nabble.com/K3-Beta-firmware-rev.-2.78%3A-%22Sign-on-banner%22-and- misc.-improvements-tp2131207p2163868.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 ___ 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] OT Tuner Basics
Many of the questions about use of extra tuners with an ATU are answered by a review of the fundamental assumptions for the design of simple (cheap) power and swr meters. Most common tuners assume that the input to the tuner is 50 ohms. The SWR calibration is based on the ratio of reflected to forward power. If the input impedance is not 50 ohms then calculation of power is not accurate because the meters are not smart enough to measure actual power based on the true input impedance. They indicate power based on a voltage or current measurement. The real power will vary if the input impedance changes. When two tuners are used in series, such as the K3 ATU to an MFJ* to an amplifier, the impedance at the output of the ATU and the input to the MFJ is rarely 50 ohms. Only if the amplifier input is 50 ohms resistive and the MFJ is bypassed, then the SWR indicated by the MFJ might be close to 1 to 1 after the ATU is tuned. However, if the amplifier input impedance is perhaps 100 ohms, then the ATU will match the 100 ohms and the MFJ measurements will be referenced to the 100 ohms. The SWR based on forward and reflected power indicated by the MFJ will not be accurate. The forward power indicated by the MFJ may show twice the real input power when the input termination is 100 ohms. Power = (V squared)/R. As you can see the indicated power changes as the resistance changes. The real power is not changed, just the reference has changed and is not accounted for. So, do not waste time reading the power at the output of an ATU unless you know that the load is 50 ohms. Bypass the ATU and use the MFJ and you may get a reasonable indication on the MFJ when the transmitter output impedance is 50 ohms. Or delete the MFJ and use the ATU indicators. Now if you have a true power measuring watt meter that actually calculates current times voltage without using the input impedance as a reference then these measurements might be of some interest. * MFJ is used here to represent the most commonly available SWR meters using forward and reverse power indicators that assume a 50 ohm input impedance including the common Bird and others. I did not get into the additional errors introduced when the reference is a complex impedance and not just a simple resistance. True power is based only of the resistive part of the impedance. So again the error is compounded with the simple P=(I squared) times R approach Aloha, John KH7T W7BRS wrote: Elecrafters, I know this is off-topic, but the range of ham-smarts on this list is pretty good so I'll throw the question here and hopefully get some of that ham-smarts too. OK -- K3/100 with KAT3 is the rig. I have it connected through a tuner and then to the SB-200 and then Dipole K3/100/ATU - MFJ tuner - SB200 - Dipole If I use Auto mode on the KAT3, put the MFJ tuner in Bypass and hold TUNE then the KAT3 goes and brings the SWR (according to the display) to a favorable value (1.0 to 1.2). I use a MFJ tuner between my Rig and Amp because the Old Bard told me to. Actually my setup is different than what I just described, but I'm simplifying this for the question at hand. [ What I really do is K3 - Small MFJ Tuner - SB200 - Big MFJ Tuner - Dipole ] On the watt meter of the (small) MFJ Tuner, the indication is I have a non favorable SWR, more reflected power than had I put the KAT3 in bypass and manually tuned the MFJ Tuner to a favorable SWR (1.0 to 1.2 or so). So, can someone explain in basic terms what's happening when I use Auto mode on the KAT3 and see favorable SWR on the KAT3 (via K3 display) but do not see favorable SWR on the MFJ tuner? This is not a round-about way of expressing a problem with the K3. On the contrary - I couldn't be more pleased with the KAT3 performance and so forth. I'm asking this question as a data-point before I decide to build the KAT2 for my finished K2. Thanks in advance, -jeff -- Jeff Wandling DE W7BRS K3 #2105 http://w7brs.com/k3 k3u...@w7brs.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 Beta firmware rev. 2.78: Sign-on banner and misc. improvements
I found it... :blush: LB3SA wrote: With the 1.2.1.6 K3 Utility for OSX I get the message that I have the newest firmware although it is 02.73. Does anyone have a direct link to download 02.78? -- View this message in context: http://n2.nabble.com/K3-Beta-firmware-rev.-2.78%3A-%22Sign-on-banner%22-and-misc.-improvements-tp2131207p2164012.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] OT Tuner Basics
Jeff, Any antenna tuner, including the MFJ, the KAT3, or any other does not actually tune the antenna. It adds a network of inductance and capacitance between its input and output to allow the input impedance to be near 50 ohms resistive while the output impedance will be whatever it was to start with. What I am trying to say is that an SWR meter placed at the output of the KAT3 will not change before, during, or after tuning the KAT3 (unless there is something wrong in the antenna system) - nothing is changed on the output side of the tuner. The only thing that will change is the impedance looking into the tuner input, and that is the SWR indicated by the K3 using its internal wattmeter. The KAT3 arranges its internal inductance and capacitance so it is a transmission line transformer of the proper ratio to produce a 50 ohm match to the K3 PA to operate into. Take the small MFJ tuner between your SB200 and the K3 away, it serves no purpose that I can think of. With the SB-200 and the high power tuner both set to bypass, the KAT3 should be able to match the antenna. When you put the SB-200 in-line, you should set the KAT3 to bypass, and if the amp input circuit does not offer a low enough SWR to properly operate the K3, then whatever problem that exists should be fixed in the amplifier. The large MFJ will have to be tuned manually to match the output of the SB-200 to your antenna - the same as the KAT3 did for you automatically when the SB-200 and large MFJ tuner were bypassed. BTW, the easiest way to adjust a manual tuner is to connect an antenna analyzer to the tuner input and then tune until you have a low SWR or ideally a R=50, X=0 impedance indication. After that, connect the tuner to the SB-200 and operate (on that band or band portion) without touching the tuner settings any further. As long as your antenna does not change, you can record the tuner settings for quickly resetting the tuner when operating on that frequency the next time. 73, Don W3FPR W7BRS wrote: Elecrafters, I know this is off-topic, but the range of ham-smarts on this list is pretty good so I'll throw the question here and hopefully get some of that ham-smarts too. OK -- K3/100 with KAT3 is the rig. I have it connected through a tuner and then to the SB-200 and then Dipole K3/100/ATU - MFJ tuner - SB200 - Dipole If I use Auto mode on the KAT3, put the MFJ tuner in Bypass and hold TUNE then the KAT3 goes and brings the SWR (according to the display) to a favorable value (1.0 to 1.2). I use a MFJ tuner between my Rig and Amp because the Old Bard told me to. Actually my setup is different than what I just described, but I'm simplifying this for the question at hand. [ What I really do is K3 - Small MFJ Tuner - SB200 - Big MFJ Tuner - Dipole ] On the watt meter of the (small) MFJ Tuner, the indication is I have a non favorable SWR, more reflected power than had I put the KAT3 in bypass and manually tuned the MFJ Tuner to a favorable SWR (1.0 to 1.2 or so). So, can someone explain in basic terms what's happening when I use Auto mode on the KAT3 and see favorable SWR on the KAT3 (via K3 display) but do not see favorable SWR on the MFJ tuner? This is not a round-about way of expressing a problem with the K3. On the contrary - I couldn't be more pleased with the KAT3 performance and so forth. I'm asking this question as a data-point before I decide to build the KAT2 for my finished K2. Thanks in advance, -jeff ___ 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 Beta firmware rev. 2.78: Sign-on banner and misc. improvements
Thanks! :) On 150109 7:41 PM, Dick Dievendorff (via Nabble) ml-user+39055-973238...@n2.nabble.com wrote: MCU revision 2.78 is a Beta release. Instructions for installing K3 Beta firmware are on http://www.elecraft.com/K3/k3_software.htm Dick, K6KR -Original Message- From: elecraft-boun...@... http://n2.nabble.com/user/SendEmail.jtp?type=nodenode=2164147i=0 [mailto:elecraft-boun...@... http://n2.nabble.com/user/SendEmail.jtp?type=nodenode=2164147i=1 ] On Behalf Of LB3SA Sent: Thursday, January 15, 2009 9:53 AM To: elecr...@... http://n2.nabble.com/user/SendEmail.jtp?type=nodenode=2164147i=2 Subject: Re: [Elecraft] K3 Beta firmware rev. 2.78: Sign-on banner and misc. improvements With the 1.2.1.6 K3 Utility for OSX I get the message that I have the newest firmware although it is 02.73. Does anyone have a direct link to download 02.78? -- View this message in context: http://n2.nabble.com/K3-Beta-firmware-rev.-2.78%3A-%22Sign-on-banner%22-and-misc.-improvements-tp2131207p2164169.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] OT Tuner Basics
I may have led this question astray.. I hope this wraps it. Comments in line... I have it connected through a tuner and then to the SB-200 and then Dipole K3/100/ATU - MFJ tuner - SB200 - Dipole If I use Auto mode on the KAT3, put the MFJ tuner in Bypass and hold TUNE then the KAT3 goes and brings the SWR (according to the display) to a favorable value (1.0 to 1.2). I use a MFJ tuner between my Rig and Amp because the Old Bard told me to. Actually my setup is different than what I just described, but I'm simplifying this for the question at hand. [ What I really do is K3 - Small MFJ Tuner - SB200 - Big MFJ Tuner - Dipole ] I don't know why the Old Bard told you to do that. It makes no sense to me. First of all take the small MFJ tuner out of the line and connect the K3 directly to the SB200. The tuner in the K3 will do the job of the small MFJ tuner. No sense adding tuner loss between the Amp and the rig. I suspect the Old Bard told you that because the input of the SB200 is not 50 ohms. More about that later... I thought I wrote it, but perhaps it was ommited. When I run the K3/100/ATU I put the small tuner between the Rig and the amp in Bypass. It's more or less an RF speed bump when I use the K3 ATU. I do not tune with the rig-to-amp tuner ever, when I use the K3. I merely was indicating that I glance at the power meter on it and was wondering about that when I was using the K3/ATU in AUTO. The K3 is not my only rig. When I select a different transmitter, one that does not have an ATU, then I do need the small tuner between the other rig and the amp. Hence, that is why it's inline. The old-bard remark was in context of using a NON-ATU-equipped rig before the amp. This indicates that the SB200 input is not 50 ohms. You may have some troubles with the SB200 input, but you should be able to adjust that. Look at the SB200 manual and see if it has input matching adjustments. You certainly don't need two tuners for the SB200 input! I certainly agree. I leave the conventional tuner between the rig and SB-200 in bypass when I use the K3. My K2 has no ATU so I need it then. My K3 has an ATU so I don't need it then. So, can someone explain in basic terms what's happening when I use Auto mode on the KAT3 and see favorable SWR on the KAT3 (via K3 display) but do not see favorable SWR on the MFJ tuner? Here's what is going on. In the configuration you have now, you are correcting the mismatch between the small tuner and the K3. When you remove the small tuner you will be seeing the input of the large tuner (If you have the amp turned off or in standby.) That is precisely what I was doing before I owned the K3/100/ATU. I would match the rig (YaeKenCom) radio without an ATU. See above about putting it into bypass when I'm operating K3/100/ATU. 1. Put the K3 in tune (hold the XMIT button). Adjust the large tuner connected to the output of the Amplifier for the lowest SWR. You want the amp turned off or in standby at this point. [steps] Yes, I do that too. In my station, I put the analyzer so that I can select a transmitter of K3, YaeKenCom, or Analyzer. This way the coax path is nearly identical between the analyzer down to ant. vs. the rig down to ant. Not identical but close enough that when the time comes to put the key down my match is pretty close and I trim it up on the big tuner (amp to antenna). Then when I select analyzer, I read the R/Z/SWR values off the analyzer as I do my darndest to match with the manual conventional tuner between the amp and antenna (big MFJ tuner). Then when I got it setup, I switch Tx back to K3, and use the AUTO tune function of the K3's ATu to polish up and away I go with nearly full PEP power that I can get. In all instances that I use the K3/ATU, the tuner between the K3 and Amp is in bypass. In all instances that I do not use the K3/ATU then the tuner between the other rig and the amp is NOT in bypass. In all instances the big-tuner between the Amp and Antenna is NOT in bypass. Now you're good to go :o) I think so, thanks! ___ 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] Updated Version of K3 AGC Paper
I have printed this and hole punched it. It is with my working manual and is as important as anything else in there - great work Jack. ! [Elecraft] Updated Version of K3 AGC Paper Jack Smith jack.smith at cliftonlaboratories.com Thu Jan 15 11:47:12 EST 2009 I've made a couple of small changes to my K3 AGC PDF paper and web page. The new version is identified by the 15 January 2009 date and may be downloaded at: http://www.cliftonlaboratories.com/Documents/Elecraft%20K3%20Transceiver%20AGC%20Parameters%20and%20S-meter.pdf The changes are summarized in the Revisions section of the document. Jack K8ZOA www.cliftonlaboratories.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] Filters for weak signal 160 meter CW and crowded contest bands
I wish I could vary the pitch of a signal directly while listening to it, instead of having the sidetone cover it up. 73, Drew AF2Z Excellent suggestion Drew. My IC-765 has that feature (as do many rigs), and I recently forgot how much I depended upon it until I sent my K3 into Elecraft for upgrades, and started using the 765 again. It does fine tune in real time for the best CW audio/sig strength on the 765, much better than the K3's implementation for me. I wonder if the Elecraft folks can offer that feature in the future? 73 Gary NL7Y ___ 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/Filters-for-weak-signal-160-meter-CW-and-crowded-contest-bands-tp2154048p2164402.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] OT Tuner Basics
Tom, N5GE wrote: This indicates that the SB200 input is not 50 ohms. You may have some troubles with the SB200 input, but you should be able to adjust that. Look at the SB200 manual and see if it has input matching adjustments. Yes it has. Take amp out from the green cover, tune the input coils from behind, it´s easy. 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] K3 Sidetone volume
Kinda akin to that, I'd like to be able to adjust the pitch while still listening to the received CW - I find it had to set a pitch I like - I adjust it, go back to the signal (if it's still there) and find it's not what I wanted. Perhaps a slight change, so a HOLD of PITCH allows adjustment of pitch while still hearing the CW, a LONG HOLD does what PITCH currently does? -- It is unwise to be too sure of one's own wisdom. It is healthy to be reminded that the strongest might weaken and the wisest might err. -Mohandas K. Gandhi (1869-1948) On 15 Jan 2009, at 18:16, John King wrote: Carl said: .. sidetone volume. I require several volume settings depending on which speaker or headphones I'm using and by the time I realize that I have it wrong I'm in the middle of a QSO and can't change it without drowning out either myself or the other station. 73 thanks for listening Carl WS7L K3 #486 Yes! I want very much to be able to adjust the sidetone volume without actually creating sidetone. I hate to wake the rest of the household trying to turn down the sidetone volume that I was trying to turn down to avoid waking the rest of the household. ___ 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] Summary OT Tuner Basics
Gotta hand it to Tom, N0SS, for putting it in clearer symbols. Anyway, he made this: http://w7brs.com/n0ss+ant.pdf That's what I got going on. And, after all the email it seems clear what's happening. Thanks all. -jeff -- Jeff Wandling DE W7BRS K3 #2105 http://w7brs.com/k3 k3u...@w7brs.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] ***SOLD*** FS: Complete QRP/QRO K2 Station
The K2 has been sold thanks to all who responded.. NZ8J -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of NZ8J Sent: Wednesday, January 14, 2009 7:04 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] FS: Complete QRP/QRO K2 Station Have decided to sell my K2 station and go a different route. It is in very good condition, both electrically and physically, non smoking environment. ___ 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] Birdie after KRX3 installation
Today I discovered a strong microphonic birdie at 21.273MHz in main and subreceiver. I'm sure it wasn't there prior the KRX3 installation So I tried the hints posted here at the list, rerouting of the TMP-Cables and refastening of all the screws. After a couple of hours try, a screwed up TMP-Cable (thank God there was a spare cable with the KRX3), two extra ground connections from TMP-Cable plugs to the shielding, I succeeded to reduce the birdie to almost inaudibe. But when I installed the top cover again, the birdie in the main receiver got stronger. With removed top cover the birdie is barely audible, but as soon as I get close with the cover it reaches S4. I tried to position the TMP-Cabels again, but no success. Every time I put on the top cover, it came back to S4. Finally i gave up after another 2 hours try. A quick check of the other bands showed also a S4 birdie in the main receiver at 50.047.8MHz. Does anyone know about this and maybe got a solution to this? 73 de Roland, DC1RS -- View this message in context: http://n2.nabble.com/Birdie-after-KRX3-installation-tp2165027p2165027.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] K2 power calibration questions
W7BRS wrote: When it says adjust L1 for maximum power what is that really trying to say? You are trying to maximise the signal getting through that tuned circuit on a system that is periodically trying to adjust the power to match the demanded power and which has an absolute maximum power that it can output, and may overheat if you demand a high power with limited drive. As you tune the circuit, the power will increase, but, after a while, the firmware will decide that it is no longer 2 W and try to compensate. Note that you are not calibrating the power at this stage, you are maximising the gain. On page 78 it refers to HiCur message. I can supply 20A, but what's the recommended HiCur limit set in the K2? I just got done building, I = 3.5 Amps, although it should say in the manual. don't want to fry it before I clean the rosin off. hi hi, or maybe it's a self cleaning radio... ;-) Page 79 -- I really can't do these tests well because I can't get a signal. What There are no tests on page 79, or rather the page numbers depend on the version of the manual. was the Elecraft mini kit for helping do these tests, I think there's a signal generator right? Page 80 For Tx alignment, what is the recommended HiCur limit set in the K2? I'm hitting HiCur only on the 10 and 12m combo as I find the peak. 3.5 Amps, or what it says in the manual. -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm ___ 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 Cool version 6 - posted.
Julian, G4ILO wrote: ab2tc wrote: I repeat, there is no need for 3rd party software, nor is .NET required. .NET *causes* the problem. .NET is required because programming managers believe they need to use it to get the right balance between minimising cost and using something supported by Microsoft and saleable to customers. port that can be used with Windows and uses just standard Windows API. You should be able to do anything that Windows can do using standard APIs, as, in the end, VB, .NET, and third party controls eventually use standard APIs. I think this thread is straying rather far off topic. Don's program is Requests to declare a thread off topic should be directed to Eric, off list. written using Visual Basic. Therefore he probably uses the MSCOMM control to I believe we started using third party controls (possibly written by the same people) because MSCOMM was limited to the two standard ports. of us amateurs writing free software for other hams are not professionals and do what we can with the skills and tools that we have. Software development managers want to minimise training costs and maximise the available labour pool, so professional developers actually choose languages for similar reasons to amateurs; the main difference is that having the latest buzzword language is more important to them. Some of the biggest users of more technical programming tools are actually freeware writers. -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm ___ 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 pwr out on digimodes
Benson-2 wrote: I do not have the benefit of an external wattmeter at the moment and frequently use digital modes, esp. JT65A. Assuming I want to transmit 25 W or less, if I have PWR set at 25 and adjust the mic gain for ALC just under 1 bar (basically just until one bar disappears), approximately how much power would be transmitted? The resolution of the 100W rf scale doesn't really help at low levels. On my K3 currently I would expect to get more than 60W rms output if PWR was set to 25. Since I imagine that there would be a lot more complaints about this if everyone had the same problem, my guess is that it actually depends on the individual K3. All I can say is that the PWR control cannot be relied upon for setting the power level in data modes, which means if you don't have a thru-line power meter you have little choice but to try and use the built in meter to set the power. I have given up using my K3 until this problem is fixed, as it's too easy to forget this and overdrive the PA with dire results. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-pwr-out-on-digimodes-tp2163956p2165172.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] OT Tuner Basics
On Thu, 15 Jan 2009 11:20:37 -0800 (PST), you wrote: I may have led this question astray.. I hope this wraps it. [snip] Yes, I do that too. In my station, I put the analyzer so that I can select a transmitter of K3, YaeKenCom, or Analyzer. This way the coax path is nearly identical between the analyzer down to ant. vs. the rig down to ant. Not identical but close enough that when the time comes to put the key down my match is pretty close and I trim it up on the big tuner (amp to antenna). Then when I select analyzer, I read the R/Z/SWR values off the analyzer as I do my darndest to match with the manual conventional tuner between the amp and antenna (big MFJ tuner). Then when I got it setup, I switch Tx back to K3, and use the AUTO tune function of the K3's ATu to polish up and away I go with nearly full PEP power that I can get. In all instances that I use the K3/ATU, the tuner between the K3 and Amp is in bypass. In all instances that I do not use the K3/ATU then the tuner between the other rig and the amp is NOT in bypass. In all instances the big-tuner between the Amp and Antenna is NOT in bypass. Now you're good to go :o) I think so, thanks! Great! If you tune the input coils in the amp as Jan suggests you may even be able to bypass the K3 tuner also. Tom, N5GE http://www.n5ge.com http://www.swotrc.net ___ 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] Elecraft K3 FOR SALE
FOR SALE: Elecraft K3 w/ accessories Elecraft K3 FOR SALE S/N 687 used by non-smoker. The unit has the following options: 100W PA, 5 bpfs (13kHz, 6kHz, 2.8kHz, 1kHz, 250Hz), KBPF3, KDVR3, KAT3, KTCXO3-1, KXV3, and Alinco EMS-14 Desk Microphone. The K3 is in mint condition. Asking $2700 John (N2KBE) 704 764-7416 or jtra...@carolina.rr.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 Cool version 6 - posted.
This is getting a little off topic. Lets end the thread now and take the discussion off list to direct email. 73, Eric WA6HHQ Elecraft List Moderator == David Woolley (E.L) wrote: Julian, G4ILO wrote: I think this thread is straying rather far off topic. Don's program is Requests to declare a thread off topic should be directed to Eric, off list ___ 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] Condx
Hello, 40m is doing good tonight. Just worked EI9JF on 7004.3 with my K2 @ 5w and a ground mounted Butternut HF9V with 120 radials. 72 and Thanks, Ron Polityka WB3AAL www.wb3aal.com www.n3epa.org/ K1 - SN 01011 K2 - SN 01392 ___ 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] Digital mode Identification
How can a newbie to digital modes identify signal types on the waterfall? Tnx. -- Sent from my mobile device Frank KD8FIP ___ 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] Condx
Just worked TS7C on 7075.3 QSX up 193. K2 @ 5w on LSB with the Butternut HF9V 72 and Thanks, Ron Polityka WB3AAL www.wb3aal.com www.n3epa.org/ K1 - SN 01011 K2 - SN 01392 ___ 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 For Sale in VK5
Factory assembled K3 for sale in VK5. $3300 Australian Dollars. This K3 is serial number 2127 and is configured as follows: K3/10-F (Factory assembled 10W) KBPF3 (General coverage receive 0.5 to 30MHz) KFL3B-FM (13KHz FM 8 pole roofing filter) KFL3A-6K (6KHz AM 8 pole roofing filter) KFL3A-2.8K (2.8KHz 8 pole roofing filter) KFL3A-400 (400Hz 8 pole roofing filter) KTCXO3-1 (0.5 ppm high stability crystal oscillator option) KXV3 (Transverter and IF output interface, for connection of LP-PAN for example) Radio supplied with KUSB adapter for connection of K3 to a PC and an Elecraft MH2-R microphone. Can also supply a 13.8V 5 Amp continuous, 7 Amp peak linear power supply for $50 (3 months old, Powertech model MP3096 bought from Jaycar). This radio is fully functional and is in as-new condition. Used in a non-smoker environment and does not have any scratches or damage of any kind. Email: shan...@gmail.com - Shane K3/10: S/N 2127, KBPF3, KFL3B-FM, KFL3A-6K, KFL3A-2.8K, KFL3A-400, KTCXO3-1 KXV3. -- View this message in context: http://n2.nabble.com/K3-For-Sale-in-VK5-tp2165818p2165818.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
[Elecraft] FS: KAT100 XV50
I have the KAT100 XV50 posted for sale on QTH.com if anyone is interested or in need of this equipment. Please respond off list or per the QTH ad. Tnx es 73, Dave N8AG ___ 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] Digital mode Identification
I've searched around for similar information and so far this is the best I've found: http://www.w1hkj.com/FldigiHelp/Modes/index.htm It shows waterfall, spectrum, and audio samples of most of the common digital modes (listed at the left of the page). The comparison comments at the bottom left link are interesting as well.. 73, Dave AB7E Original Message Subject: [Elecraft] Digital mode Identification From: "Frank MacDonell" kd8...@gmail.com Date: Thu, January 15, 2009 4:54 pm To: Elecraft elecraft@mailman.qth.net How can a newbie to digital modes identify signal types on the waterfall? Tnx. Frank KD8FIP ___ 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 FSK External Pullup
Is an External Pullup resistor needed on the FSK (ACC pin 1) input line? One of our Navigator Interface users reported that if the FSK line is also tied to an external pullup resistor, that it caused his K3 to refuse to stay powered up when the cable was connected. He subsequently removed the pullup and the system operated normall. The pullup resistor is a 4.7K through a diode to +5V. Our original cables for the K3 were wired with this pullup connected, and no problems have been reported until now. We will remove the pullup connection from our drawing since it is not needed, and all future cables will not have this connection. Has there been a change in the K3 that would cause this problem? If so, if earler users upgrade their units to lastest specs, will they also have this problem? Clint KK7UQ ___ 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
