Re: [Elecraft] RE: QRP from the bottom of the Grand Canyon
Canyons play havoc with verticals. The Grand Canyon is a mile or more deep. Depending on where you are, if you are truly in the inner gorge, you will need horizontal polarization and NVIS mode on 40m and lower. Of course, if you were to camp part way down on the plateau, you might be able to get out from there with a vertical on 20m for example, propagation willing. 20 has not been in good shape lately. I would go prepared for NVIS, which is easier to put up in a canyon bereft of real trees, anyway. We have tested both 80m and 40m NVIS with dipoles only 6 feet off ground. You will need a stub to match the low impedance, such as two 50 ohm coaxes in parallel, quarter wave approximately. You are looking at about 15 ohms center impedance at six foot height. A reflector wire was just off the ground under the dipole in each case. Dipole was cut by 468 formula, however, leave long for adjustment to part of band you want. The reflector wire is made 5 per cent longer. Are you entering from the South Rim trails? Most of my comments are assuming an approach from South Rim, with which I am familiar as to geography. -Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2 AGC problem
Hello all, Just some added info abt my K2's problem. Measured Vagc at pin 5 of the IF amp: -No antenna connected AGC on: 3.83V -no antenna connected AGC off: 3.82V -40m antenna connected: 3.90V (my FT-1000D shows abt S5 noise) -XG2 connected :3.99V (50uV level, should be S9) Found a post from N6IZ in 2004 that stated that Vagc varies about 100mV per 10dB. ( http://ac6rm.net/mailarchive/html/elecraft-list/2004-10/msg00085.html ) In my case that says my S9 level is only about 16 dB above noise level... Is there anyone who measured Valc at some point and can tell me if these values are way off? Thanks again, Sjoerd PE2SVN -Oorspronkelijk bericht- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Sjoerd Verzonden: dinsdag 29 augustus 2006 22:56 Aan: elecraft@mailman.qth.net Onderwerp: [Elecraft] K2 AGC problem Hello all, While operating my K2 and switching between bands a lot i noticed my AGC is a bit strange. When trying to set the AGC treshold following Don FPR's instructions i find that the noise level is not changing with the AGC treshold pot with both preamp on and off. There is a difference in noise level between preamp on or off but there not enough noise to trigger the AGC, even with preamp on. Could this be a lack of gain in the receiver or is the ALC circuit wrong? S-meter seems OK to me and the S-meter readings do change with the ALC treshold. Hope to get this nice toy even better.. 73, Sjoerd, PE2SVN ___ 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] QRP from the bottom of the Grand Canyon
I wonder if there are any hams in the People of the Blue-Green Water who live in the western area of Grand Canyon. If so, they might have some experience in propagation from the remote bottoms of the Canyon. I was there as a visitor many years ago and saw no antennas but things sure change even in such a remote spot as Havasupai. 73 Al W4ABW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2 AGC problem
Sjoerd, If you look at the MC1350 data sheet, you will find the AGC characteristics for operation wiht a 12 volt supply to the chip and that graph indicates that the gain changes almost linearly from 0 dB to 20dB with an AGC voltage change from 5 to 6 volts, or 10 dB for a 500 mV change, and the rate of change increases abruptly above the 6 volt level. However, the K2 uses that IF amplifier chip at an 8 volt supply, so as a rough guess, the voltages should be multiplied by a factor of 2/3. I have not attempted to characterize this amplifier at an 8 volt supply. Fact 2 - the gain of the IF Amp is governed by the current rather than the voltage into the AGC pin, so you should conclude that there are several dependencies that will modify the actual voltage required for a given gain. I would suggest that you set the AGC Threshold somewhere between 3.7 and 3.8 volts as measured at Control Board U2 pin 5. You may end up with some slight reduction of gain between AGC on and AGC off, but lower voltage here will tend to produce problems with CAL S HI and CAL S LO settings. If you are willing to live with the consequences of using a voltage lower than 3.7 volts to produce less change between AGC ON/OFF, then you must accept the fact that you will have a weaker AGC gain reduction overall, and your S-meter may produce readings that are different from the norm. You may not have any problem at all, only a consequence of the AGC action produced by your high noise level. 73, Don W3FPR -Original Message- Hello all, Just some added info abt my K2's problem. Measured Vagc at pin 5 of the IF amp: -No antenna connected AGC on: 3.83V -no antenna connected AGC off:3.82V -40m antenna connected: 3.90V (my FT-1000D shows abt S5 noise) -XG2 connected : 3.99V (50uV level, should be S9) Found a post from N6IZ in 2004 that stated that Vagc varies about 100mV per 10dB. ( http://ac6rm.net/mailarchive/html/elecraft-list/2004-10/msg00085.html ) In my case that says my S9 level is only about 16 dB above noise level... Is there anyone who measured Valc at some point and can tell me if these values are way off? Thanks again, Sjoerd PE2SVN ___ 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] how to bypass atu?
I was wondering what is the easiest way to bypass the ATU in the K2 so that it can be used with an external AMP? 73, Bill Allen - WA5PB ___ 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] KXB3080
I'm thinking that if I can build it, anyone can. My last real radio building before the KX1 was a Heath HR-1680 receiver that I build in high school. For twenty years I was an appliance operator. I had built a TenTec regen receiver for fun to see if I could still do it and it works fine. After a couple of other small kits (keyers and a wattmeter) I decided I wanted a KX1. I built it and it worked right the first time. I then built up the KXB3080. After a little troubleshooting help from Don (I'll thank him again) KX1 s/n 1519 is up and running just great. If the KXB3080 is the toughest kit that Elecraft produces, then I'm really looking forward to working on a K2 (trying to get the XYL to buy off that I need another radio). THAT part is prolly the most difficult part for me ;) Jim Ujcik, WD9HBC ___ 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 Front Panel Extension
Hi Bob, Buttons for the various filters with LEDs, a button and LED for the Rx antenna, button for Split, VFO A and VFO B. LEDs for RIT and XIT, VFO A Tx/Rx, VFO B Tx/Rx. Some of these are just to save myself from making a serious faux pas by transmitting on top of the rare DX when I thought I was up 5 :o( 73, Julius n2wn Question for everyone: If there would be a small hardware front panel extension with say 16 or 20 pushbuttons and LEDs (either associated with the buttons or for independent functions), what functions would you most want? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2 AGC problem
Don, Ok about the MC1350 specs, and my noise level is very high, but i am afraid that with less noise there is a problem. I did some more measurements end followed the signal tracing procedure, where i find 2 questionable things: - Crystal filter output seems quite low, it reads 0,17 Vrms, instead of the given 0,35V .. tried this with different BFO settings, no significant difference. The input of the filter is about 2,15 Vrms with a jumper over the NB connector (5 dB more than normal) - AGC @ saturation seems way too low, it reads about 4,3 volts where it should be 6,9V. My opinion is that there is some sort of fault in the AGC circuit, that causes no difference in noise level with AGC on or off, and also a big difference in audio level between a S3 and a S9+ station. I have changed C8 a while ago to stop the receive from muting with AGC off, Is it possible that the ACG oscillator level is too low because of this? The receive seems to hear well, compared to my FT-1000. Just the big difference in audio levels worries me.. Thanks again, Sjoerd PE2SVN -Oorspronkelijk bericht- Van: Don Wilhelm [mailto:[EMAIL PROTECTED] Verzonden: woensdag 30 augustus 2006 14:02 Aan: Sjoerd; elecraft@mailman.qth.net Onderwerp: RE: [Elecraft] K2 AGC problem Sjoerd, If you look at the MC1350 data sheet, you will find the AGC characteristics for operation wiht a 12 volt supply to the chip and that graph indicates that the gain changes almost linearly from 0 dB to 20dB with an AGC voltage change from 5 to 6 volts, or 10 dB for a 500 mV change, and the rate of change increases abruptly above the 6 volt level. However, the K2 uses that IF amplifier chip at an 8 volt supply, so as a rough guess, the voltages should be multiplied by a factor of 2/3. I have not attempted to characterize this amplifier at an 8 volt supply. Fact 2 - the gain of the IF Amp is governed by the current rather than the voltage into the AGC pin, so you should conclude that there are several dependencies that will modify the actual voltage required for a given gain. I would suggest that you set the AGC Threshold somewhere between 3.7 and 3.8 volts as measured at Control Board U2 pin 5. You may end up with some slight reduction of gain between AGC on and AGC off, but lower voltage here will tend to produce problems with CAL S HI and CAL S LO settings. If you are willing to live with the consequences of using a voltage lower than 3.7 volts to produce less change between AGC ON/OFF, then you must accept the fact that you will have a weaker AGC gain reduction overall, and your S-meter may produce readings that are different from the norm. You may not have any problem at all, only a consequence of the AGC action produced by your high noise level. 73, Don W3FPR -Original Message- Hello all, Just some added info abt my K2's problem. Measured Vagc at pin 5 of the IF amp: -No antenna connected AGC on: 3.83V -no antenna connected AGC off:3.82V -40m antenna connected: 3.90V (my FT-1000D shows abt S5 noise) -XG2 connected : 3.99V (50uV level, should be S9) Found a post from N6IZ in 2004 that stated that Vagc varies about 100mV per 10dB. ( http://ac6rm.net/mailarchive/html/elecraft-list/2004-10/msg00085.html ) In my case that says my S9 level is only about 16 dB above noise level... Is there anyone who measured Valc at some point and can tell me if these values are way off? Thanks again, Sjoerd PE2SVN ___ 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] how to bypass atu?
Bill, Try tuning the ATU in a 50 ohm load. GL, Sjoerd PE2SVN -Oorspronkelijk bericht- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Bill Allen Verzonden: woensdag 30 augustus 2006 14:16 Aan: elecraft@mailman.qth.net Onderwerp: [Elecraft] how to bypass atu? I was wondering what is the easiest way to bypass the ATU in the K2 so that it can be used with an external AMP? 73, Bill Allen - WA5PB ___ 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] Optical Encoder problem:
Still no adjustment, or frequency change. In the Elecraft Manual page 108 under Front Pnel Board, 4th paragraph down it says. The Encoder can be turned off By U3 to save current under certain operating conditions. Does any one have any Idea what this means? And also how would you try and turn it Back On. 73 Bruce N9BX This message was sent via the WishCom Webmail system, a free service offered to subscribers. http://www.wishcom.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] RE: K2 Front Panel Extension
Hello All, Thanks everyone, there have been a lot of good suggestions. Some of them seem to move beyond a simple front panel extension into the realm of a remote front panel, which also has been explicitly mentioned. Perhaps there could be two different products here, a simple front panel extension and a separate remote front panel. Mike, WA1SEO, pointed to his web page where he has a photo of his version of a front panel extension. Mike, I'd be interested in hearing how well this works from a performance perspective, since that was a concern that was raised, e.g., slow K2 response to commands over the KIO2. It appears that Mike used rotary switches in his box. My preference is for push buttons with associated LEDs, but more important when designing something for manufacturing is to use the same parts that are already used in other products and minimize the number of new parts introduced (as a System Engineer in Product Development, manufacturing and resource utilization issues are always part of the new product thought process). Also, I didn't include any knobs/pots functions in my original list as I know how much more complex (i.e., expensive) that would make the front panel extension, and I didn't see any existing knob/pot functions that are not already easily accessible on the K2 front panel - that changes, of course, when we get away from a simple front panel extension into the realm of a remote front panel. 73 Bob W1SRB ___ 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: K2 Front Panel Extension
One problem with just using the K2's CAT commands is that you can't get at AF / RF gains, also tuning via CAT is a bit on the slow side. As I don't have a K2 I can't look at what would be needed to enable access to AF/RF, but this will surely be something being considered for the K3 :-) In fact having a port on K3 which is similar to a laptop's docking port or some other alternative would allow a third-party to develop an optional front panel kit, freeing up the Elecraft design team from this chore. Simon Brown --- RSGB HF Convention October 2006: http://www.rsgb-hfc.org.uk/ - Original Message - From: Solosko, Robert B (Bob) [EMAIL PROTECTED] To: Elecraft Discussion List elecraft@mailman.qth.net Sent: Wednesday, August 30, 2006 3:42 PM Subject: [Elecraft] RE: K2 Front Panel Extension Hello All, Thanks everyone, there have been a lot of good suggestions. Some of them seem to move beyond a simple front panel extension into the realm of a remote front panel, which also has been explicitly mentioned. Perhaps there could be two different products here, a simple front panel extension and a separate remote front panel. [chop-o-matic] ___ 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] 10 pF axial-lead capacitor ID
Could someone please help me identify the 10 pF capacitor used in the frequency counter for the K2? From the drawing I am aware that the leads will be as on a resistor. I need to know the color/shape and number markings. Thank you, Dale, Indiana, kc9cwb ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2 AGC problem
Sjoerd, Your first point about the low output from the crystal filter with an input that is normal would indicate that either you have a crystal problem or the filter is not properly matched. Check T7 to see if it has the proper turns ratio (20:5), and the 5 turn winding goes toward the crystal filter. The 5 dB higher than normal at the filter input with the KNB2 removed and jumpered is about right, the KNB2 contains a 6 dB pad which is not in the circuit with just a jumper. You may want to measure the filter input and output again with the KNB2 in place to provide a better match for the filter input. Solve the filter loss problem first and then look at the AGC. You may be getting an incorrect reading for the AGC Saturation level unless you ramped up the signal level into the IF amp to compensate for the filter loss and as a result are not able to saturate the AGC. The S-meter readings will follow the AGC action directly (output of Control Board U2A) except for differences in the resistances following the op amp output, so if your S-meter is responding in a somewhat normal fashion, the AGC voltage applied should also follow - all the rest of the circuitry is insode the IF amp chip. 73, Don W3FPR -Original Message- Ok about the MC1350 specs, and my noise level is very high, but i am afraid that with less noise there is a problem. I did some more measurements end followed the signal tracing procedure, where i find 2 questionable things: - Crystal filter output seems quite low, it reads 0,17 Vrms, instead of the given 0,35V .. tried this with different BFO settings, no significant difference. The input of the filter is about 2,15 Vrms with a jumper over the NB connector (5 dB more than normal) - AGC @ saturation seems way too low, it reads about 4,3 volts where it should be 6,9V. My opinion is that there is some sort of fault in the AGC circuit, that causes no difference in noise level with AGC on or off, and also a big difference in audio level between a S3 and a S9+ station. I have changed C8 a while ago to stop the receive from muting with AGC off, Is it possible that the ACG oscillator level is too low because of this? The receive seems to hear well, compared to my FT-1000. Just the big difference in audio levels worries me.. Thanks again, Sjoerd PE2SVN -Oorspronkelijk bericht- Van: Don Wilhelm [mailto:[EMAIL PROTECTED] Verzonden: woensdag 30 augustus 2006 14:02 Aan: Sjoerd; elecraft@mailman.qth.net Onderwerp: RE: [Elecraft] K2 AGC problem Sjoerd, If you look at the MC1350 data sheet, you will find the AGC characteristics for operation wiht a 12 volt supply to the chip and that graph indicates that the gain changes almost linearly from 0 dB to 20dB with an AGC voltage change from 5 to 6 volts, or 10 dB for a 500 mV change, and the rate of change increases abruptly above the 6 volt level. However, the K2 uses that IF amplifier chip at an 8 volt supply, so as a rough guess, the voltages should be multiplied by a factor of 2/3. I have not attempted to characterize this amplifier at an 8 volt supply. Fact 2 - the gain of the IF Amp is governed by the current rather than the voltage into the AGC pin, so you should conclude that there are several dependencies that will modify the actual voltage required for a given gain. I would suggest that you set the AGC Threshold somewhere between 3.7 and 3.8 volts as measured at Control Board U2 pin 5. You may end up with some slight reduction of gain between AGC on and AGC off, but lower voltage here will tend to produce problems with CAL S HI and CAL S LO settings. If you are willing to live with the consequences of using a voltage lower than 3.7 volts to produce less change between AGC ON/OFF, then you must accept the fact that you will have a weaker AGC gain reduction overall, and your S-meter may produce readings that are different from the norm. You may not have any problem at all, only a consequence of the AGC action produced by your high noise level. 73, Don W3FPR -Original Message- Hello all, Just some added info abt my K2's problem. Measured Vagc at pin 5 of the IF amp: -No antenna connected AGC on: 3.83V -no antenna connected AGC off: 3.82V -40m antenna connected: 3.90V (my FT-1000D shows abt S5 noise) -XG2 connected :3.99V (50uV level, should be S9) Found a post from N6IZ in 2004 that stated that Vagc varies about 100mV per 10dB. ( http://ac6rm.net/mailarchive/html/elecraft-list/2004-10/msg00085.html ) In my case that says my S9 level is only about 16 dB above noise level... Is there anyone who measured Valc at some point and can tell me if these values are way off? Thanks again, Sjoerd PE2SVN ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list.
RE: [Elecraft] how to bypass atu?
Bill, Set the menu to ATU CALP or ATU CALS to bypass the LC section of the KAT2. Similarly with the KAT100, set it to ATU CAL. 73, Don W3FPR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Bill Allen Sent: Wednesday, August 30, 2006 8:16 AM To: elecraft@mailman.qth.net Subject: [Elecraft] how to bypass atu? I was wondering what is the easiest way to bypass the ATU in the K2 so that it can be used with an external AMP? 73, Bill Allen - WA5PB ___ 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 Free Edition. Version: 7.1.405 / Virus Database: 268.11.6/430 - Release Date: 8/28/2006 ___ 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 VFO noise
Hi, Mike. I only ever hear VFO clicking when there is a very strong adjacent signal. For example one time I was using a 44ft doublet at 30ft at a campsite, and I was operating on 30m, around 10.120MHz. Suddenly a very very strong commercial RTTY station started up around 10.130MHz. Now when I tune from 10.120MHz down to 10.110MHz I get faint clicks as I tune. If I tune from 10.120MHz up to 10.130MHz, the clicking got stronger. So I assume it's something connected to the AGC? I don't know if that helps :) 73 Martin. ___ 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] 10 pF axial-lead capacitor ID
Dale, You should find it in the Frequency Probe bag. It is about the same diameter as a 1/4 watt resistor, but is much shorter - in fact it may look like a round bead with two leads sticking out from either side. Color will vary from one manufacturer to another, but the recent ones I have seen are a yellow/amber color, and I cannot recall the markings, which can also vary except for the value identifier which should be either '10' or '100'. 73, Don W3FPR -Original Message- Could someone please help me identify the 10 pF capacitor used in the frequency counter for the K2? From the drawing I am aware that the leads will be as on a resistor. I need to know the color/shape and number markings. ___ 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] Optical Encoder problem:
While this is a fact, it is not under user control. Do not be concerned about it. The firmware should reactivate the encoder when it is moved. 73, Don W3FPR -Original Message- In the Elecraft Manual page 108 under Front Pnel Board, 4th paragraph down it says. The Encoder can be turned off By U3 to save current under certain operating conditions. Does any one have any Idea what this means? And also how would you try and turn it Back On. 73 Bruce N9BX ___ 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] KXB3080
Yes, the K2 is easier than the KX1, just more pieces. I let the 'XYL convincing' part to you, I offer no suggestions in that arena G 73, Don W3FPR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Soaring Eagles Sent: Wednesday, August 30, 2006 8:18 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KXB3080 I'm thinking that if I can build it, anyone can. My last real radio building before the KX1 was a Heath HR-1680 receiver that I build in high school. For twenty years I was an appliance operator. I had built a TenTec regen receiver for fun to see if I could still do it and it works fine. After a couple of other small kits (keyers and a wattmeter) I decided I wanted a KX1. I built it and it worked right the first time. I then built up the KXB3080. After a little troubleshooting help from Don (I'll thank him again) KX1 s/n 1519 is up and running just great. If the KXB3080 is the toughest kit that Elecraft produces, then I'm really looking forward to working on a K2 (trying to get the XYL to buy off that I need another radio). THAT part is prolly the most difficult part for me ;) Jim Ujcik, WD9HBC ___ 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 Free Edition. Version: 7.1.405 / Virus Database: 268.11.6/430 - Release Date: 8/28/2006 ___ 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] K-2 and digital question
Please send the responses to the reflector? I am sure many of us are interested! - Original Message - From: [EMAIL PROTECTED] [EMAIL PROTECTED] To: elecraft@mailman.qth.net elecraft@mailman.qth.net Sent: Wed Aug 30 11:02:12 2006 Subject: [Elecraft] K-2 and digital question Has anyone connected a RigBlaster with their K2 for SSTV or PSK-31? If so, I'd like to contact you off-line as I have some questions. I've wired the pins in the RigBlaster per the instructions for Elecraft and hooked it up to the computer properly but no luck receiving, etc. Thanks in advance for any help! 73, Cary, K4TM K2-100 #5266 Lynchburg, VA [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. == ___ 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] 5730 Hears!
Well, I made it through Part II and the rig hears! Had one IC in backwards (duh) but got it out and back in OK. Two questions: 1. I really can't hear much of a peak, if any when I adjust L34. I am hearing impaired and wear two hearing aids so maybe it's me? 2. I hear signals but sensitivity is quite below my TR7 after adjusting L1 and L2, is this normal with full sensitivity expected after final alignment? I'm having a blast but I'm playing too much hooky from work (I am in sales and work from home) because I can't stay away from the K2! 73, Bill NZ0T ___ 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] 5730 Hears!
Bill, I trust you are not confusing sensitivity with loudness. The K2 is designed for low receive current drain, and as such does not have a powerful audio output amplifier. Sensitivity is the ability to hear extremely weak signals, so pick the weakest signal that you can hear with the TR7 and see if the K2 can also receive that signal. You will likely find that the K2 can hear signals that the TR7 cannot. The L34 adjustment peak is quite broad. If you cannot discern a definite peak, just set the slug 1 1/2 turns in from the top of the can. 73, Don W3FPR -Original Message- Well, I made it through Part II and the rig hears! Had one IC in backwards (duh) but got it out and back in OK. Two questions: 1. I really can't hear much of a peak, if any when I adjust L34. I am hearing impaired and wear two hearing aids so maybe it's me? 2. I hear signals but sensitivity is quite below my TR7 after adjusting L1 and L2, is this normal with full sensitivity expected after final alignment? ___ 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 mixer discussion
Wayne Burdick [EMAIL PROTECTED] wrote: There are potential issues with using any type of mixer besides the present SA612 in the KX1. First is PCB space. The present mixer, which requires nearly no additional parts, barely fits. I seriously doubt that there would be enough room for any type of multi-transformer bus-switching mixer, even if were all SMD and replaced the 30 or 30/80 meter module. snip -- Where I have gone astray is that I had thought that the discussion was about a new design of a rig similar to the KX1 but with higher IIP3, and not a retrofit modification. I agree that it would be difficult if not impossible to fit in a H-mode mixer in place of the KX1's existing mixer. In addition it probably would be difficult to find space for the IF and LO modifications required to take full advantage of the proven high performance of a H-mode mixer. With regard to the front end mixer's conversion gain / loss, I would suggest that in high performance HF receivers a mixer exhibiting conversion loss rather than gain is more useful *provided* that the noise figure of the following IF system is held suitably low. Obviously the overall noise figure is that of the IF system increased by approximately the conversion loss of the mixer and insertion loss of the input filters and switching, but the overall IIP3 would be approximately that of the IF increased by these losses. While conversion gain improves noise figure, assuming that the noise figure of the mixer itself is of the right order, the IIP3 of the overall receiver will be less than that of the IF system by approximately the gain of the mixer minus the loss of the front end filters. Also the increased level of unwanted signals coming out of the mixer places greater stress on any IF stage that might be before the IF filters, and the filters themselves. With a mixer exhibiting conversion loss, the place to make up the gain is, I believe, in the IF *after* the narrowband IF filters, not as you point out before the mixer nor at audio. Forgive me for old news which is not relevant to a simple modification to the KX1, simply comment on one of your points. The H-mode mixer requires approximately 0dbm LO power if properly driven, but because of the space problem in the KX1 not relevant. FWIW I have had fewer spur problems with this mixer than with a Level 7 or a Level 27 diode ring with proper LO injection, and properly terminated at all three ports. To be fair to the KX1, I suspect that you did not design it to be able to cope with the BC stations on 40m as we hear them here, while still providing copy when the desired signal is riding the noise level at S1 or so, a situation where attenuators can be counter-productive. Depending on the time of day, the level of signal here from some BC stations above 7.100 MHz can reach -10 dbm carrier or higher, with 'enthusiastic' modulation in some cases. 73, Geoff GM4ESD ___ 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] LOOKING FOR ACCESS A FUSE POST..... A WHILE BACK ??
Hello all, Trying to locate whomever posted info on the subject company, maybe a week ago. I believe the post was combined with something else. Wanted to see if they made a purchase from the company and how it went. THANKS, Ken W2GIW ___ 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] how to bypass atu?
As usual Don has provided the correct direct answer to your question. However, I'm wondering if it would not be desirable to keep the tuner in the path to the amplifier. I believe it will assure a measure of additional filtering for spur suppression and match the amplifier input exactly. Just a thought. I don't think there is a down side to keeping the tuner in the circuit. Bill AK5X ___ 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 Remote Program
I have noticed that the K2 Remote S meter display loses its signal when the SEND CW button is pushed. The S METER button has to be pushed to reestablish the S meter signal. Stray RF is not the cause since this will happen with the K2 in CW TEST mode. Is this normal? Roy Morris W4WFBNo virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.11.7/433 - Release Date: 8/30/2006 ___ 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] KAT-100-1 not responding to K2 with a KAT2 - FIXED!!!
Big thanks to Gary and Scott at Elecraft for pointing me in the right direction. Turned out to be a control cable problem (between the back panel of the K2 and the control panel). Looks like the 100 watt amp and EC-2 setup are next! N9KO ___ 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
