Re: [Elecraft] K3 Power out
Jan Erik Holm wrote: Please Elecraft, make a FW change and limit the radio to 100W, thanks! Human nature being what it is, the likely result of this would be a large number of people refusing to upgrade their firmware any further and a significant grapevine message about how new purchasers can get increased power by downgrading the firmware. There is quite a significant lobby on this list for the radio to impose no restrictions in firmware. -- 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 matching filters
I didn't bother about paying/asking for matched default filters for my KRX3. The one in the main board has a -0.93kHz offset and the one in the KRX3 is -0.83kHz. Shifting them both to -0.88kHz seems to make no difference to performance - would you expect a 50Hz shift in a nominal -6dB b/w of ~2.7kHz to be that noticable anyway? However the wondering 'beat' between right and left channels disappears completely when you doctor the offsets - just need a nice big Beverage now. 73, Stewart Rolfe, GW0ETF Lyle Johnson wrote: The main receiver offset is -.97 but the new 2.k filter is marked -.93. My question is are these a match or did I get the wrong part? I think you may have received the wrong filter. At this point, I'd install the new filter in the KRX3, but set the Main and KRX3 offsets to -0.95 (split the difference). 20 Hz is not going to make a practical difference in any operational sense that come sot mind. -- View this message in context: http://n2.nabble.com/k3-matching-filters-tp1683028p1686175.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] UK Elecraft net report for Sunday 21st December
Conditions were quite good this week with only a little QRM. Topics were: French amateurs running AM nets on 3550 KHz, usually active most mornings, plus the usual fishing boats... S-Meter calibration on both the K2 and K3. General view was that the K3 can be very accurately calibrated. Softrock and Rocky, pay attention to the cables between the Softrock and the sound card input, especially watching the balance. CW sending while on SSB, press key 1 in the CW weight menu option. The recent speaker resistor grounding modification to protect the AF amplifier IC. Aluminium flight cases for the K3, the suggested Maplin case (www.maplin.co.uk order code N70AP) that is often on sale for £14.99, may be too small to accommodate the K3. The Expert 1K-FA linear amplifier Stations were: G4ARI, Tim M1PAF, Paul G0VGS, Ian GM0ELP, Doug GM3SEK, Ian M0MRW, Mike G4CWB, Dave G4NWJ, Jim Merry Christmas! Dave, G4AON K3/100 #80, Acom 1000 linear, dipole. ___ 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 Power out
Jan Erik Holm wrote: After measuring the TX IMD on SSB I stopped putting the radio above 100W. Jim try setting your power supply so you have 13.8-14.0V key down at maximum power and see if that helps the IMD some. 73, Bill -- View this message in context: http://n2.nabble.com/K3-Power-out-tp1684775p1686460.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] even further OT: new SS amps
On Sun, Dec 21, 2008 at 12:52 AM, Joe Subich, W4TV li...@microham-usa.com wrote: [snip] so it really boils down to is six meters and the tuner worth the extra $1000. [end snip] I'm not sure where you got the extra $1000 from. Currently, HRO is selling the Quadra for $2999. Great price for the Quadra, but still pricey for a less than full power HF amp. de Doug KR2Q ___ 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 - does this sound right?
After reading the recent comments on POWER OUT, I decided to check mine. Using the voltmeter on the K3 Zero power out: 13.6v 5 watts out: 13.3v 100 watts out: 13.1v The drop from 13.6 to 13.1 for 100w doesn't seem so bad. But why the drop when running only 5 watts out...seems out of line compared to the 100w level drop. Does the 5 watt output V drop seem right to you? Comments? PS is 25-30 year old Astron RS35A Thanks, Doug KR2Q ___ 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] UK Elecraft net report for Sunday 21st December
Softrock and Rocky, pay attention to the cables between the Softrock and the sound card input, especially watching the balance. I didn't listen to the UK Elecraft net this morning so I'm not aware of the context, however when I started building Softrock's I encountered the familiar centre frequency spike/noise problem. This was cured completely by changing the cable between the SR and soundcard to a Maplin L44AU http://www.maplin.co.uk/ The photo on the Maplin page is not clear enough to see, but there are actually two separately screened cables, one for each channel, rather than the more common (cheap) version which has both signal cables wound together inside a single screen. Anyway, its works for me. 73 to all Trevor G0KTN ___ 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] Microphone question - K3
I want to replace the element in a Kenwood MC-50 with an electret. I know that the K3 provides bias voltage to pin 1 on the front mic connector which is also the audio line - as long as bias is selected in the mic sel menu. Does this pin already have the coupling capacitor in line or do I need to add that in the microphone? I don't see a capacitor or resistor inside my MH2 hand mic so I'm assuming all I have to do is connect the audio and bias leads to pin 1 and the ground to pin 7? Thanks all for the help! 73 Bill NZ0T -- View this message in context: http://n2.nabble.com/Microphone-question---K3-tp1686616p1686616.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] Microphone question - K3
I want to replace the element in a Kenwood MC-50 with an electret. I know that the K3 provides bias voltage to pin 1 on the front mic connector which is also the audio line - as long as bias is selected in the mic sel menu. Does this pin already have the coupling capacitor in line Yes. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: pwr out - does this sound right?
Doug, I guess you are seeing the Voltage drop on the power lead and it's connectors. With my not so old Racal linear power supply, I obtained the following results from the metering on the K3: Zero out, 13.8V 5 Watts out, 13.5V 100 Watts out, 13.3V This was checked into a 50 Ohm load on both 80m and 20m 73 Dave, G4AON K3/100 #80 - After reading the recent comments on POWER OUT, I decided to check mine. Using the voltmeter on the K3 Zero power out: 13.6v 5 watts out: 13.3v 100 watts out: 13.1v The drop from 13.6 to 13.1 for 100w doesn't seem so bad. But why the drop when running only 5 watts out...seems out of line compared to the 100w level drop. Does the 5 watt output V drop seem right to you? Comments? PS is 25-30 year old Astron RS35A Thanks, Doug KR2Q ___ 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 matching filters
Stewart, You are correct that the importance of the offset is inversely proportional to the filter width. A 50 Hz shift not make much difference with the 2.7 or 2.8 kHz width, but it certainly will make a big difference at a 200 Hz width. 73, Don W3FPR GW0ETF wrote: I didn't bother about paying/asking for matched default filters for my KRX3. The one in the main board has a -0.93kHz offset and the one in the KRX3 is -0.83kHz. Shifting them both to -0.88kHz seems to make no difference to performance - would you expect a 50Hz shift in a nominal -6dB b/w of ~2.7kHz to be that noticable anyway? However the wondering 'beat' between right and left channels disappears completely when you doctor the offsets - just need a nice big Beverage now. 73, Stewart Rolfe, GW0ETF ___ 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 - does this sound right?
Doug, You are testing the regulation capability of your power supply. I would say that is fairly normal - most of the drop will occur in the initial part of the I-V output curve for the PS, then will flatten out as the current becomes greater. You are indicating a regulation of 3.7% over that current draw range which is quite good. 73, Don W3FPR DOUGLAS ZWIEBEL wrote: After reading the recent comments on POWER OUT, I decided to check mine. Using the voltmeter on the K3 Zero power out: 13.6v 5 watts out: 13.3v 100 watts out: 13.1v The drop from 13.6 to 13.1 for 100w doesn't seem so bad. But why the drop when running only 5 watts out...seems out of line compared to the 100w level drop. Does the 5 watt output V drop seem right to you? Comments? PS is 25-30 year old Astron RS35A Thanks, Doug KR2Q ___ 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 Measured Power Output versus Commanded Power Output
I've recently run a series of measurements comparing the commanded power output with measured power output for my K3, using an HP437B/8482A power meter. The details are at http://www.cliftonlaboratories.com/k3_power_setting_accuracy.htm After updating my K3's firmware to the most recent beta releases and running the calibration procedure, I found a considerable improvement over the as received K3. There's still some frequency and power level dependency in the K3's wattmeter, but it isn't too bad, with almost all frequencies and power levels being within +/- 10%. 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] even further OT: new SS amps
I'm not sure where you got the extra $1000 from. Currently, HRO is selling the Quadra for $2999. OK ... I had not priced the Quadra in some time. Last I looked it was $3895 from most sources. In any case, $2999 is a coupon price - HRO's regular price is $3499. If you want to compare selling price the ALS-1300 will probably end up between $2249 and $2499 if the retailers discount at the same 15 to 20% rate as they do on the other Ameritron amplifiers. The ALS-1300 will not be in the same class as the Elecraft amps (whenever they are available) but it is an interesting option for someone who does not need the last fraction of a dB in power, performance, or features. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DOUGLAS ZWIEBEL Sent: Sunday, December 21, 2008 7:21 AM To: micro...@microham-usa.com Cc: Elecraft Reflector Subject: Re: [Elecraft] even further OT: new SS amps On Sun, Dec 21, 2008 at 12:52 AM, Joe Subich, W4TV li...@microham-usa.com wrote: [snip] so it really boils down to is six meters and the tuner worth the extra $1000. [end snip] I'm not sure where you got the extra $1000 from. Currently, HRO is selling the Quadra for $2999. Great price for the Quadra, but still pricey for a less than full power HF amp. de Doug KR2Q ___ 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: pwr out - does this sound right?
And it's connectors is quite true. I did some back of the envelope calcs here and 60-75% of the voltage drop appears to be due to the connectors + power supply sag. This conclusion was drawn from a least squares linear fit of the V vs I plot to obtain an effective R value. Then the cable resistance was determined from wire cables. I collected a number of them from people with different supplies, crimped and soldered PP's. These effective resistance values seem to vary 50%-- perhaps a reflection of power supply sag. We're talking total effective resistances in the 0.02 to 0.04 ohm range. Draw you own conclusion whether or not it would be desirable to have a lower resistance connector. The calc's do indicate for a 5' cable, the difference between using 10 ga and 12 ga supply cable is negligible. 73 de Brian/K3KO Dave G4AON wrote: Doug, I guess you are seeing the Voltage drop on the power lead and it's connectors. With my not so old Racal linear power supply, I obtained the following results from the metering on the K3: Zero out, 13.8V 5 Watts out, 13.5V 100 Watts out, 13.3V This was checked into a 50 Ohm load on both 80m and 20m 73 Dave, G4AON K3/100 #80 ___ 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: new SS amps
It's funny how experiences can differ. A couple years ago I decided to refurbish my old Heathkit SB-200. Included in the project was a set of new tubes to replace the original tubes from 1972. I purchased a pair of Svetlana 572Bs from RF parts. One of them burned out its filament after it was turned on for about the fourth or fifth time. I have never had a tube do that before. RF parts exchanged them for a set of Taylor tubes which have worked fine for the past couple of years. I guess all this means is that when you are buying imported tubes the quality control may leave something to be desired. Eimac tubes may cost much more, but except for some well documented exceptions, they generally appear to be much more consistent and robust. Frankly, I would rather pay more for the amplifier up front with good Eimac tubes instead of being forced into a game of Russian roulette as to whether the tubes will still be available when replacements are needed, sometimes a lot sooner than should be the case. Bruce-W8FU -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of WILLIS COOKE Sent: Saturday, December 20, 2008 8:15 PM To: Ron D'Eau Claire; Elecraft Reflector Subject: RE: [Elecraft] OT: new SS amps Ron, there are other considerations. The tubes available today are made in China. I had very bad luck with two sets of Taylor brand 572Bs that were made in China. One set never worked at all and the other set lasted about a month. I am still using the 572Bs that I bought in 1976 used. So, if you get one of the 811A or 572B amps with Chinese tubes how long will they last? Am I extremely unlucky or did I ruin them intentionally as R. F. Parts accused? I really don't know, but it certainly will weigh heavily on my decision of what amp to buy. In fact, I just bought a used ALS-600. I will see how well that works for me. Tuning is not really a factor for me. If you buy a No Tune solid state amp then need an antenna tuner you have not changed things a lot. But, will you need new tubes in a month or so? How long will you be able to buy them? Willis 'Cookie' Cooke K5EWJ --- On Sat, 12/20/08, Ron D'Eau Claire r...@cobi.biz wrote: From: Ron D'Eau Claire r...@cobi.biz Subject: RE: [Elecraft] OT: new SS amps To: 'Elecraft Reflector' elecraft@mailman.qth.net Date: Saturday, December 20, 2008, 3:44 PM What catches my eye is that comparing the amps on page 1 and page 9, you have to pay $2,000 more for an additional 1.7 dB of gain with the amp on page 9. Sure. you have to know how to adjust an amp and actually tune the one on page 1 whereas the one on page 9 is no tuning (assuming the antenna is tuned or you do the tuning with an external tuner). I guess that's significant to the hard-core contester, but for that convenience along with the 1.7 dB gain you must pay $2,000 for those who demand the ability to QSY across the band or between bands instantly, or who want to operate their station remotely through a computer. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DOUGLAS ZWIEBEL Sent: Saturday, December 20, 2008 2:30 PM To: Elecraft Reflector Subject: [Elecraft] OT: new SS amps I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? de Doug KR2Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] even further OT: new SS amps
Thanks Joe... Actually, in a way, Elecraft KPA800 and 1500 and the Ameritron ALS1300 are in the same class...NOT YET AVAILABLE. :-) de Doug KR2Q On Sun, Dec 21, 2008 at 10:15 AM, Joe Subich, W4TV li...@microham-usa.com wrote: I'm not sure where you got the extra $1000 from. Currently, HRO is selling the Quadra for $2999. OK ... I had not priced the Quadra in some time. Last I looked it was $3895 from most sources. In any case, $2999 is a coupon price - HRO's regular price is $3499. If you want to compare selling price the ALS-1300 will probably end up between $2249 and $2499 if the retailers discount at the same 15 to 20% rate as they do on the other Ameritron amplifiers. The ALS-1300 will not be in the same class as the Elecraft amps (whenever they are available) but it is an interesting option for someone who does not need the last fraction of a dB in power, performance, or features. 73, ... Joe, W4TV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Fw: [Elecraft] OT: new SS amps...more
The amplifier I was thinking of was the Metron! They seemed to be very well made and almost indestructable from what I heard from the Texas bunch on 40 SSB way back. - Original Message - From: Sandy ebj...@charter.net To: wrco...@flash.net; Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 8:36 PM Subject: Re: [Elecraft] OT: new SS amps No, but a popular mobile amp that ran 600 watts were selling for considerably less. I used a Henry 2K-2 for years until it good too damned heavy for this old man to horse around! I now have an Ameritron AL-811H Much lighter and 500 watts is very adequate. Will run more, but why do it as the 811A's I have will last a long time at 500 watts CW. Solid state would be niceBUT. Hard to by on a retirement fixed income. 73, Sandy W5TVW Been listening on 3546.5 nights around 0200-0300Z on the little rig inside. - Original Message - From: WILLIS COOKE wrco...@flash.net To: Sandy ebj...@charter.net; Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 7:32 PM Subject: Re: [Elecraft] OT: new SS amps Sandy, did you ever take a look at what a kilowatt amp cost in 1955? It would be more than than $3,000 when $3,000 was a year's pay for most. Willis 'Cookie' Cooke K5EWJ --- On Sat, 12/20/08, Sandy ebj...@charter.net wrote: From: Sandy ebj...@charter.net Subject: Re: [Elecraft] OT: new SS amps To: DOUGLAS ZWIEBEL doug...@gmail.com, Elecraft Reflector elecraft@mailman.qth.net Date: Saturday, December 20, 2008, 5:14 PM Who can afford almost $3K? Ham radio getting way outta my league! 73, Sandy W5TVW - Original Message - From: DOUGLAS ZWIEBEL doug...@gmail.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 4:30 PM Subject: [Elecraft] OT: new SS amps I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? de Doug KR2Q I have no vested interest in this company. ___ 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: 270.9.19/1857 - Release Date: 12/19/2008 10:09 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1859 - Release Date: 12/20/2008 2:34 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1859 - Release Date: 12/20/2008 2:34 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
[Elecraft] No Audio for Paddle on K3/10
Looking for help. Not sure what I did...but I have no audio for the paddle and the paddle is working as a straight key but.I can see letters on the display. Any ideas? Thanks for your help. -- 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: Rx dead, need help. More details
The K3 shows no reaction on changing the volume or rf-gain, but it shows reaction on changing the bandwidth etc. I can hear a test signal from a transmitter, with no antenna connected to the K3. The signal i hear does not change when increasing power, no s-meter deflection. So i assume the rx itself is ok, but the received signal is not amplified by the stages after the rx. Also, the K3 fails to transmit. Any comments? -- 73, DM4iM K2 #2706 ___ 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 Panel Screws - I'm Not Alone
Hi John, Phil and others, . Maybe they'll be offered by Elecraft . Elecraft does offer replacement screws, allthough not (yet) as a complete set. Look on the Spare parts and Mod Kits order page under Miscellaneous. You find FLTSCRKT with 10 screws for a dollar. It says for K1 but they are the same as the K3. I ordered a set some time ago to replace some on my K3. The pan-heads are there too. 73 de PE8E, Ron K3/100 #00201 K3/10 #01201 -- Date: Sat, 20 Dec 2008 21:17:19 -0800 From: John Sims n...@sbcglobal.net Subject: [Elecraft] K3 Panel Screws - I'm Not Alone Yet again, from tonight's reflector digest: So - Now after two mod processes plus installation of the KRX3, my cabinet screws are starting to show a little wear. Maybe Elecraft should offer a small kit that just includes replacement cabinet screws (top-and side-cover especially) for those of us who keep taking our K3s apart. Phil - AD5X Here, here! Those screws heads are too malleable, a few of yours are showing wear and tear. I wish I'd ordered a full set of them -- they're cheap. Maybe they'll be offered by Elecraft. They did give me better side panel heat sink screws (two) for the K2. Aptos finally realized the initial pair weren't good for repeated assembly and disassembly. ___ 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 - does this sound right?
You are testing the regulation capability of your power supply. Sorry, Don. Using the internal voltmeter in the K3 does not test the regulation of the power supply. The pick-off point for the voltmeter is after Q2 (FDS6375) the FET power switch and D6 (SB530) reverse voltage protection diode. The drop Doug is measuring is primarily the drop through Q2. If you don't believe me, check the voltage readings at 2W, 5W and 10W then compare them to 20W, 50W and 100W. Then compare those same voltages to a calibrated DVM directly across the power supply. Note, the voltage read by the K3 voltmeter will be .3V less (at no load) than the voltage at the PowerPole due to D6 and the drop will increase with current through Q2. Power for the KPA3 100 Watt amplifier is picked off before D6/Q2. In my case (an Astron RS-35A that drops 0.01V from no load to 20A measured directly at the output), I see 13.7V on the K3 with no load (power supply set to 14.0V), 13.3V at 10.0W and 13.1V at 100W. The 0.2V difference between 10W (3.7A) to 100W (18.0A) represents 0.014 Ohms [0.2V / (18.0-3.7A)] of power cable and connector resistance. My concern is the relatively large change in voltage with current through the FDS6375. The current through Q2 should be less than 4 A (no current for KPA3). The Fairchild data sheet (www.fairchildsemi.com/ds/FD/FDS6375.pdf) shows Rds(on) should be less than 0.03 Ohms for -Vgs 2V. I am concerned that the .4V swing on the unregulated +12A line to the LPA (driver) might be responsible for some of the IMD seen in the K3 output at higher power levels. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Sunday, December 21, 2008 9:50 AM To: DOUGLAS ZWIEBEL Cc: Elecraft Reflector Subject: Re: [Elecraft] K3: pwr out - does this sound right? Doug, You are testing the regulation capability of your power supply. I would say that is fairly normal - most of the drop will occur in the initial part of the I-V output curve for the PS, then will flatten out as the current becomes greater. You are indicating a regulation of 3.7% over that current draw range which is quite good. 73, Don W3FPR DOUGLAS ZWIEBEL wrote: After reading the recent comments on POWER OUT, I decided to check mine. Using the voltmeter on the K3 Zero power out: 13.6v 5 watts out: 13.3v 100 watts out: 13.1v The drop from 13.6 to 13.1 for 100w doesn't seem so bad. But why the drop when running only 5 watts out...seems out of line compared to the 100w level drop. Does the 5 watt output V drop seem right to you? Comments? PS is 25-30 year old Astron RS35A Thanks, Doug KR2Q ___ 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 Power out
OK that could be done, I will experiment further when I do get some time. I know I have checked the PS voltage but dont remember what it was, have to go down into the basement and check. Now checked, it´s 13.88 at 100W and 13.84V at 120W. IMD comes up 8dB at 120W compared with 100W. Stays pritty much flat betwen 10-100W. At 100W K3 is about 10 dB worse then a FT-1000D at full 200W. And for kicks a Collins KWM-2 is 10 dB better then the FT-1000D. What I measure is the fully modulated envelope and scan 10 kHz up/dwn from center frequency. That is, what interests me is how the radios looks 5 kHz up/down from center frequency, i e adjacent channel IMD if I call it that. If I would have been the designer I would never have allowed above 100W PEP SSB, CW of course is OK. Merry Christmas / Jim Bill W4ZV wrote: Jan Erik Holm wrote: After measuring the TX IMD on SSB I stopped putting the radio above 100W. Jim try setting your power supply so you have 13.8-14.0V key down at maximum power and see if that helps the IMD some. 73, Bill ___ 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 Power out
Yes, crowbar circuits disable the power supply, but some crowbar circuits are self-resetting. They shut down the power supply only as long as the over-current condition remains and automatically return power when it's gone. Some of the K3 owners here have run into that. Their K3 shut down unexpectedly, so they hit the POWER switch and it came back on. They transmit again and the K3 shuts down again (because the power supply did). Sometimes it's not apparent what is happening because they don't notice that the power supply is actually shutting down. I like the more conventional crowbar in the Astron because it requires cycling the Astron's power switch to reset it. That makes it very clear why things shut down. My Astron 20 is stock; I have not modified it in any way. It will deliver a full 20 amps, perhaps an couple of amps more, before the crowbar trips. That's enough to run the K3 at 100 watts on all bands if the SWR is low. A well designed supply like the Astron can deliver full rated power - in this case 20 amps ICS - 24/7 without any problems as long as the demand is ICS -- Intermittent Commercial Service -- meaning there are periods when the full current is not being drawn such as during receive. In the K3 running CW or SSB, that demand is intermittent even during transmit since the full current is drawn only on momentary voice peaks or while the CW key is actually closed. Ron AC7AC -Original Message- From: Jim W7RY [mailto:w...@arrl.net] Sent: Saturday, December 20, 2008 9:56 PM To: Ron D'Eau Claire; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Power out Ron A crowbar circuit is used to disable the power supply in the event of over voltage. The current limit is what would limit the current output of a power supply. A typical crowbar circuit uses a SCR triggered by a voltage sensor. The SCR conducts and shorts the output of the supply. Which in turn puts it into current limit mode and decreases the output voltage to near zero. And yes, a 20 amp supply is marginal for a 100 watt HF rig because of the examples you have given. The 20 amp Astron can be fudged a little bit by increasing the current limit to around 22 amps. The modification involves adding a resistor to the current limit circuit of the 723 regulator. 73 and Merry Christmas to all! Jim W7RY ___ 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] Err Pl2
Just installed the KRX3 and I am getting PL2 error on the sub on 10 and 12 meters. I did the adc cal on pin 2 on acc jack. It measured 4.91 and I set the config. parameter accordingly. I'll email Aptos and see what they say. It works fine on other bands. Checked connections etc. to no avail. Any ideas? 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 Panel Screws - I'm Not Alone
I support the provision of more of the hardware off the shelf. It is needed as Elecraft use such rare and difficult to obtain threads. UNC/UNF is reasonable for a USA market, where they can probably be obtained at any hardware shop. They are very difficult to get in small quantities if you live outside the USA. Mike -- View this message in context: http://n2.nabble.com/K3-Panel-Screws---I%27m-Not-Alone-tp1687099p1687368.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] KRX3 , Mod Comments K3 Screws
Fellow Elecrafters-- Ha! I finally did it -- I sent a message (replacement screws) to the entire list rather than to the owner of the K3 I'm working on. So, now the world knows my comments on screws. Many thanks to Ron, PE8E, for letting me know about FLTSCRKT -- I'll pick that up in my next order. There are just two or three that I'd like to replace right now. After submitting a slightly critical comment about the screws, I'd like to compensate by mentioning my success with several K3 mods and the KRX3. A local friend has a K3 but lacks the eyesight for close work, so I'm his Elecraft tech. It keeps my skills up, plus it puts a K3 on the desk beside my K2 for a few days. Thus far I've installed the following K3 mods: 1. Amp pull-up resistors: easily installed and K3-to-amplifier communications are fine. 2. LINE OUT and speaker amplifier mods: much easier than expected. The original RFC 47 was easily removed intact, the holes were cleared, and the new RFC 47 fits nicely on the bottom of the board with its leads placed in the old RFC 47 holes. For the LINE OUT mod, removing the KIO3 board is much easier the second time around, it's just a matter of following instructions. 3. Front panel circuit mod: very easy Pin 7-to-through-hole mod. 4. R91 mod: it wasn't necessary for K3 S/N 718; the existing resistor reads 22 ohms. 5. KRX3 assembly and installation. Mods 2, 3, and 4 were done while the K3 was apart for the KRX3 work. The KRX3 construction and installation were successful. My only comments for Elecraft and builders are 1) the necessity of a small Allen wrench for removing the VFO B encoder (p. 18 -- I had the proper wrench left over from my K2 construction) and 2) another reminder to check the KRX3 PCB nubs before completely installing it inside the bottom shield -- I had to file a few nubs for a proper fit. Many thanks to N6XG for his helpful e-mails during the KRX3 work. K3 assembly/disassembly: thus far the rig doesn't show any wear and tear, just a few less-than-fresh screw heads. The process definitely gets easier with practice. Now I see there's another KIO3 mod coming up -- the K3 might remain on my desk a little while longer until I can complete that work. Finally, don't forget Elecraft offers not one but two great 100w rigs -- I remain one of the die-hard K2 fans; mine keeps plugging along very well for contesting and DXing. See you on-the-air with it during RTTY Roundup and again from KH6-land next year. 73, John, N7ON K2 #5023 ___ 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: power out V, A readings
Well, prompted by the interesting discourse here, I decided to ignore my bulk and get on the floor to make some measurements at the PS (RS35A). K3 on Receive: 13.60 volts K3 at 120 watts output: 13.59 volts H. Okay, so then did voltage (and amp) readings using the K3 itself. Watts are also read from the K3. Receive: 13.6 / 0.75 Xmit : watts output / voltage / amps (xmit is CW, key down) 0.0 / 13.4 / 1.75 1.0 / 13.4 / 2.14 2.0 / 13.4 / 2.49 3.0 / 13.3 / 2.66 4.0 / 13.3 / 2.84 5.0 / 13.3 / 2.96 10 / 13.1 / 3.61 12 / 13.1 / 3.88 13 / 13.3 / 7.48 (KPA kicks in) 20 / 13.3 / 8.64 30 / 13.2 / 10.21 40 / 13.2 / 11.38 50 / 13.1 / 12.45 60 / 13.1 / 13.20 70 / 13.1 / 14.07 80 / 13.1 / 14.83 90 / 13.1 / 15.64 100 / 13.0 / 16.40 110 / 13.0 / 16.97 120 / 12.9 flickering to 13.0 / 17.66 Well, the Astron appears to be VFB after about 3 decades of service. :-) So...do these numbers tell us anything? de Doug KR2Q ___ 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: power out V, A readings
Those numbers look similar to mine if you're testing on 40 meters, Doug. The efficiency of the K3's transmitter varies from band to band, with (IMX) 40 meters having the best efficiency and so the lowest current drain vs. RF output. Ron -Original Message- Well, prompted by the interesting discourse here, I decided to ignore my bulk and get on the floor to make some measurements at the PS (RS35A). K3 on Receive: 13.60 volts K3 at 120 watts output: 13.59 volts H. Okay, so then did voltage (and amp) readings using the K3 itself. Watts are also read from the K3. Receive: 13.6 / 0.75 Xmit : watts output / voltage / amps (xmit is CW, key down) 0.0 / 13.4 / 1.75 1.0 / 13.4 / 2.14 2.0 / 13.4 / 2.49 3.0 / 13.3 / 2.66 4.0 / 13.3 / 2.84 5.0 / 13.3 / 2.96 10 / 13.1 / 3.61 12 / 13.1 / 3.88 13 / 13.3 / 7.48 (KPA kicks in) 20 / 13.3 / 8.64 30 / 13.2 / 10.21 40 / 13.2 / 11.38 50 / 13.1 / 12.45 60 / 13.1 / 13.20 70 / 13.1 / 14.07 80 / 13.1 / 14.83 90 / 13.1 / 15.64 100 / 13.0 / 16.40 110 / 13.0 / 16.97 120 / 12.9 flickering to 13.0 / 17.66 Well, the Astron appears to be VFB after about 3 decades of service. :-) So...do these numbers tell us anything? de Doug KR2Q ___ 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] Fw: Err Pl2
Found the problem. Randy K8RDD - Original Message - From: Randy Downs To: Elecraft@mailman.qth.net Sent: Sunday, December 21, 2008 1:45 PM Subject: Err Pl2 Just installed the KRX3 and I am getting PL2 error on the sub on 10 and 12 meters. I did the adc cal on pin 2 on acc jack. It measured 4.91 and I set the config. parameter accordingly. I'll email Aptos and see what they say. It works fine on other bands. Checked connections etc. to no avail. Any ideas? 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
[Elecraft] K3 SSB Contour Filter (reduce total bandwidth)
K3 SSB Contour Filter Recently I was reminiscing about Narrow Band Voice Modulation which was developed in the late 1970s by Tom Lott VE2AGF and R.W.Harris, WB6CZX. An important part of this system relies on the fact that between the low frequency vowel sounds and the high frequency consonants is an almost void of several hundred Hertz. Lloyd Butler VK5BR developed a hardware filter but I was looking for a computer filter program to investigate and experiment with this. After hunting around on the internet, I suddenly realized that my K3 with KRX3 was all I needed. I locked the VFOs and set the filter on the main receiver to 350-750 Hz and the sub-receiver to 1400-2400 Hz. Listening to both receivers is equivalent to a a single receiver with a bandwidth of 2050 Hz and a notch from 750 Hz to 1400 Hz. This gives a total bandwidth of 1400 Hz with acceptable audio quality. On some SSB signals it is possible to reduce the total bandwidth down to 900 Hz. Reduced bandwidth means better S/N ratio. I had one signal (USB) with QRM from 1 kHz below. Almost no copy with normal tight filter but 100% copy with 700 Hz to 1500 Hz notched out. So, it looks promising but needs some more testing. Setting filters on CW is relatively simple. On SSB there are so many variables as you have to consider the transmitted signal, QRM and also the preferences of the receive operator. It is almost essential to have preset settings that can be recalled to suit the transmitted voice characteristics and various levels of noise and QRM. I am not an audio engineer or a programmer but it should be possible to develop a firmware (SSB contour) filter with a wide adjustable notch. I think it would be a worthwhile addition to the K3. Give the receiver/sub-receiver method a try and see if it helps you combat noise and QRM while contesting and chasing DX. If you like it, we will have to talk nicely to Lyle! 73 Tony Fegan VE3QF K3 #137 ___ 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 Hardware Updates
I have found Excelite screwdrivers in general are good, and I have also found good ones at Ace Hardware. I like the German-made tools from Wiha and Wera. I ordered a set of Wiha screwdrivers in a canvas pouch from chadstoolbox.com but they arrived too late for the K3 build. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 VFO A tension
Interesting issue with the VFO A. I can't adjust the tension to the way I like it. I installed it with the one nut to the inside and the two nuts to the outside, the lucite cover on and then put the one felt washer on before tightening it down. The VFO feels loose to me with a small amnt. of pressure applied during tightening of the allen screw. If I push it all the way down firmly to increase friction, it feels about right for part of a revolution but snags during the other part of the revolution. A closer inspection shows the encoder assembly shaft is not perfectly perpendicular to the face and it created minor scoring of the clear plastic trim panel where the outer edge of the knob rubbed against it. A review inspection showed the encoder is seated fully and tightened properly. I did have to unscrew (as suggested i the assembly. manual), the one screw on the 2D fastener to put on the front panel as it snagged on the board. Other than that, all went together as explained. To try distance the edge of the dial from the plastic, I added the extra felt washer to give it some distance and this seems to work but now rotation is accompanied by a noticeable sound of felt on felt as I turn VFO A. It still does not feel really smooth with the double felt. VFO B on the other hand turns essentially silently with the perfect amount of tension. Anyone else have this issue and found a good solution? Gary KA1J ___ 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: new SS amps
I have owned an ALS-600 for the last 5 years and have, for the most part been quite happy with it. I did an expensive solution to the no QSK problem by purchasing the Ameritron QSK-5; the pair work flawlessly together with fast, thump free, full QSK. My biggest complaint with the '600 is the really cheap-o, Mickey Mouse, decal for the front panel labling. The thing has a tendancy to start peeling along the edges of the panel, bulging out, and basicly looking like hell. I find a carefull application of something like Bondini II between the decal and the panel works fairly well to re-attach it. In the case of the QSK-5...it is VERY sensitive to high SWR (I still haven't determined what HIGH actually is). Anyway, when HIGH is exceded, the two parallel 12V bulbs, used to protect the pin diodes, go bye bye and need to be replaced. After you have ordered the replacements from Ameritron you have to open up the QSK-5, unsolder the old bulbs and solder in the new ones. This is certainly not difficult, just simply annoying...I've had to do this 3 or 4 times and finally ordered a handfull of the little beauties so I'm prepared. A resetable fuse or socketed bulb would be a real improvement to the device. As far as Elecraft amps..it seems to me that high power amplifires are basically a comodity item, bringing out another amp simply dilutes the market, unless there are compelling features to make it stand out from the crowd. It will, at best, hold its own. I would hate to see Elecraft embark on a money losing venture, especially in the current economy. Despite all that I would love to have a KPA-800! Doug, W6JD K2/100 #1626 K3/100 #23 -- Original message -- From: Sandy ebj...@charter.net Who can afford almost $3K? Ham radio getting way outta my league! 73, I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? I have no vested interest in this company. ___ 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: 270.9.19/1857 - Release Date: 12/19/2008 10:09 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 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: power out V, A readings
Okay, so then did voltage (and amp) readings using the K3 itself. Watts are also read from the K3. Receive: 13.6 / 0.75 13.6 is a little low. I would touch up the trimmer on the regulator to make the voltage 13.9 or 14.0 on receive. The K3 and particularly any accessory connected to the +12V jack will be much happier. 10 / 13.1 / 3.61 12 / 13.1 / 3.88 13 / 13.3 / 7.48 (KPA kicks in) 20 / 13.3 / 8.64 Note the voltage comes back up when the KPA kicks in (the current through Q2 drops from about 3.8A to around 2.3A). All of these track what I have been seeing. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DOUGLAS ZWIEBEL Sent: Sunday, December 21, 2008 1:53 PM To: Elecraft Reflector Subject: [Elecraft] K3: power out V, A readings Well, prompted by the interesting discourse here, I decided to ignore my bulk and get on the floor to make some measurements at the PS (RS35A). K3 on Receive: 13.60 volts K3 at 120 watts output: 13.59 volts H. Okay, so then did voltage (and amp) readings using the K3 itself. Watts are also read from the K3. Receive: 13.6 / 0.75 Xmit : watts output / voltage / amps (xmit is CW, key down) 0.0 / 13.4 / 1.75 1.0 / 13.4 / 2.14 2.0 / 13.4 / 2.49 3.0 / 13.3 / 2.66 4.0 / 13.3 / 2.84 5.0 / 13.3 / 2.96 10 / 13.1 / 3.61 12 / 13.1 / 3.88 13 / 13.3 / 7.48 (KPA kicks in) 20 / 13.3 / 8.64 30 / 13.2 / 10.21 40 / 13.2 / 11.38 50 / 13.1 / 12.45 60 / 13.1 / 13.20 70 / 13.1 / 14.07 80 / 13.1 / 14.83 90 / 13.1 / 15.64 100 / 13.0 / 16.40 110 / 13.0 / 16.97 120 / 12.9 flickering to 13.0 / 17.66 Well, the Astron appears to be VFB after about 3 decades of service. :-) So...do these numbers tell us anything? de Doug KR2Q ___ 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 power in RTTY
I understand the 100w version has to watch its power level when used in high duty cycle modes. Does anyone know about the 10w version? I'll be doing RTTY with my K3 at 5w. I assume that is low enough for the 10w PA to get along fine, but I'd like to know for sure. Couldn't find a mention in the manual. 73, Bob N6WG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FS: K2 and/or KPA-100 + KAT-100
Posted again for those that might have missed the earlier listing: K2 with almost all options and/or KPA-100 + KAT-100 in EC-2 case for sale.Available separately or as a complete station, additional savings if you purchase all of it at one time. Several additional K2 accessories available separately, with or without the base rig. Professionally assembled and aligned, everything works per specifications. Non-smoker, like new appearance, no dents, dings, scratches, etc. Priced significantly less than kit price. Shipped prepaid via FedEx to any of the 50 USA states. Contact me off list for complete details. - Jim, KL7CC ___ 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: [Moon-net] WSJT and K3
QROradio wrote: All, Given the nices specs I am considering to buy a K3 trx. (it's almost X-mas anyway...) With transverters this rig will also be used on EME. I wonder how that will work with WSJT. The K3 uses a digital IF, with A/D, DSP and D/A conversion. How would that dual conversion influence the analogue audiostream which is going to the sound card where (again) A/D conversion takes place. Willl valuable (low level) information be lost or should this work without any degradation. I wonder if someone already has some experience with a K3 and WSJT. Also I would like to know what the theoretical influence (if any) would be. Thanks for any comments given. 73 Henk PA0C ___ Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html Hello Henk, One of the nice things I enjoy about my K3 on JT65 modes is that I have a relatively flat bandpass response over an entire 4 KHz for when I am in the USB position with my 6 KHz wide roofing filter. This makes it possible to utilize the full ability available in the program to decode signals in that passband without changing frequency. It is great for pileups, where the callers can spread out to avoid QRMing each other. The bandpass shaping of my old receiver was not nearly that broad. I am sure you will enjoy using your K3 on EME. 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
[Elecraft] Excellent control software TRX-Manager
Hi Not free - but supports: sub receiver, filters, menus, full display, integrates rotator, SteppIR, DX-Cluster, Logbook, LP products DX-Map, remote and much more. www.trx-manager.com Biased - an original user and beta tester, and Laurent made the K3 work well with it - he has just ordered one himself. Give it a try - it is worth a look for no charge. 73 John VE3NFK -- View this message in context: http://n2.nabble.com/Excellent-control-software--TRX-Manager-tp1688042p1688042.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 SSB Contour Filter (reduce total bandwidth)
Didn't they use something like this in the space programs? David G3UNA K3 SSB Contour Filter Recently I was reminiscing about Narrow Band Voice Modulation which was developed in the late 1970s by Tom Lott VE2AGF and R.W.Harris, WB6CZX. An important part of this system relies on the fact that between the low frequency vowel sounds and the high frequency consonants is an almost void of several hundred Hertz. Lloyd Butler VK5BR developed a hardware filter but I was looking for a computer filter program to investigate and experiment with this. After hunting around on the internet, I suddenly realized that my K3 with KRX3 was all I needed. I locked the VFOs and set the filter on the main receiver to 350-750 Hz and the sub-receiver to 1400-2400 Hz. Listening to both receivers is equivalent to a a single receiver with a bandwidth of 2050 Hz and a notch from 750 Hz to 1400 Hz. This gives a total bandwidth of 1400 Hz with acceptable audio quality. On some SSB signals it is possible to reduce the total bandwidth down to 900 Hz. Reduced bandwidth means better S/N ratio. I had one signal (USB) with QRM from 1 kHz below. Almost no copy with normal tight filter but 100% copy with 700 Hz to 1500 Hz notched out. So, it looks promising but needs some more testing. Setting filters on CW is relatively simple. On SSB there are so many variables as you have to consider the transmitted signal, QRM and also the preferences of the receive operator. It is almost essential to have preset settings that can be recalled to suit the transmitted voice characteristics and various levels of noise and QRM. I am not an audio engineer or a programmer but it should be possible to develop a firmware (SSB contour) filter with a wide adjustable notch. I think it would be a worthwhile addition to the K3. Give the receiver/sub-receiver method a try and see if it helps you combat noise and QRM while contesting and chasing DX. If you like it, we will have to talk nicely to Lyle! 73 Tony Fegan VE3QF K3 #137 ___ 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] Fw: Err Pl2
Thought I found the problem. I had pulled the top off and found a tmp cable resting on the toroid on the bottom of the 2nd synth board. It ran for several hours with no problem after moving the cable. THEN I put the top back on. It failed when the fp temp got to 37 deg c. If I leave the top off it won't fail. The fp stays at 34deg c. It's thermal whatever it is. I'll email Aptos. Ken have you tried it with the top off? Maybe yours is thermal also. Randy K8RDD - Original Message - From: Kenneth Moorman To: 'Randy Downs' Sent: Sunday, December 21, 2008 5:38 PM Subject: RE: [Elecraft] Fw: Err Pl2 Hi Randy, I would be quite interested in what you found regarding this problem. I encountered the same problem yesterday after having my KRX3 for about 2 months. It only would give the error message you mentioned when trying to get the sub to either of those two bands. Following a suggestion in the owner's manual under the error codes, I did a CONFIG:VCO MD CAL, and it began to work on 10M, still failing on 12M. At the conclusion of the CAL routine, however, it gives the error code ERR VCO E00228. I have sent info this to Elecraft to see what I should do next and expect to hear back tomorrow. But I would love to know what you have found as the problem seems the same as mine. Thanks for any insight. 73, Ken, NU4I -- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Randy Downs Sent: Sunday, December 21, 2008 2:24 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Fw: Err Pl2 Found the problem. Randy K8RDD - Original Message - From: Randy Downs To: Elecraft@mailman.qth.net Sent: Sunday, December 21, 2008 1:45 PM Subject: Err Pl2 Just installed the KRX3 and I am getting PL2 error on the sub on 10 and 12 meters. I did the adc cal on pin 2 on acc jack. It measured 4.91 and I set the config. parameter accordingly. I'll email Aptos and see what they say. It works fine on other bands. Checked connections etc. to no avail. Any ideas? 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] No Audio for Paddle on K3/10
Frank, Did you perhaps plug the paddles into the KEY jack? That would make one side of the paddles behave like a straight key. As for the loss of sidetone, I don't know, but is there a chance that you reduced the level of the Monitor? Hold the CMP/PWR/MON knob in until you see MON n in the VFO B display - rotate the knob to change the level. 73, Don W3FPR Frank MacDonell wrote: Looking for help. Not sure what I did...but I have no audio for the paddle and the paddle is working as a straight key but.I can see letters on the display. Any ideas? Thanks for your help. ___ 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] ERR PL2 (or ERR PL1, or ERR VCO): tentative solution
Randy Downs wrote: Thought I found the problemTHEN I put the top back on. It failed when the fp temp got to 37 deg c. If I leave the top off it won't fail. The fp stays at 34 deg c. It's thermal whatever it is. Randy, Coincidentally, I just e-mailed you tentative instructions on how to fix this. It takes one resistor. Please give it a try. I discovered the problem Friday night. In rare cases, VCO operating current may be inadequate on the highest bands once the rig has warmed up. This can be cured by increasing the nominal current supplied to the oscillator JFET (Q1). To do this, R10 is reduced in value from 82 K to about 56 K. Here are the rough instructions if anyone else needs them now (or you can wait for the official modification doc): 1. Turn off the K3 and remove the affected KSYN3 module. (Note: If you saw ERR PL1, it's the main synth; ERR PL2 is the sub synth.) 2. Locate a 1/8-watt or 1/4-watt 180 K resistor (or any value from 150 to 200 K). Solder it on the top side of the KSYN3 PC board, between the pad marked DET and the pad closest to it (going in the direction of J83, not the pad labeled G). [Photo to be supplied in the modification doc.] Technical note: This resistor will be in parallel with R10, resulting in a value of around 56 K rather than the original 180 K. 3. Re-install the synth board and turn the rig back on. 4. Make sure your K3 firmware is at rev 2.73 or later. If you haven't adjusted the CONFIG:ADC REF menu parameter, do so now, using the instructions in the revision 2.73 firmware release notes (accessible from within K3 Utility). 5. Re-run VCO CAL (remember to tap SUB within the VCO MD menu entry if you're calibrating the second synth). This change can be safely made to any synthesizer module. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] TX INHIBIT
Before I start tearing things apart, and rewiring connectors I would like to ask if anyone has found an easy way to get +5V from the ACC connector to use for TX Inhibit on pin 7? Searching the list archive I found that this question was asked before by N1EU: Is there a convenient +5V source for wiring the required pull-up resistor to Aux I/O Pin 7?, no answer to it was found. I am looking at taking out one of the grounds at pin 5 or 12 and running a jumper from RP2 (10 k resistor chip with unused pins). I don't want to use the 12VDC out for this purpose. Niko - AC6DD ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 VFO A tension
Well, I'll jump in here. I had the same problem a few months ago when I assembled S/N 1889. The VFO A knob was way too loose no matter what I did. I had followed the instructions and installed one (1) felt washer under both the VFO A and B knobs. The B knob was fine. The A knob couldn't be adjusted to my liking. Then I noticed I had an extra felt washer (i.e., a total of three were included in the package). I added the second washer and life is good. I have it setup so I can spin it and get a nice smooth run (maybe 6 or 8 turns) as it freewheels but yet for my taste it's not too loose. Like everything else of course it's all a matter of taste. Two washers worked for me. If it was an accident (they included too many) then it was fortuitous in my case. If by chance you have a third washer install it and life will be good. 73/Patrick W7TMT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 VFO A tension
Hi Patrick, Indeed there was a third felt washer with mine too. Presently I do have it installed with the 2nd one in place. My knob wasn't loose though, it was quite firmly attached once tightened. When I first felt the knob rotate properly for say, 200 degrees of rotation then bind a little for the remaining 160 degrees (making up numbers here but fairly accurate), I removed the knob and saw a little circular scratch on the clear plastic cover where the edge of the knob had scored it. I then put the knob back in place put the K3 on end looked from underneath along the front plane saw the knob was resting with a slight tilt. Again though, this knob wasn't loose, it was firmly attached. I removed the knob put the 2nd felt washer on top of the first to get it off the plastic and add some tension and then tried it again but when rotating the knob, I could hear a felt on felt sound like scuffing two chalkboard erasers face to face. Not the end of the world or anything but VFO B makes only the faintest of hi from the felt and B acts perfect. The Best tension I can get for the A knob isn't as good as the VFO B which feels darned good to rotate. I did rotate each of the shafts before assembly to be sure they were OK they both rotate with zip friction. I could forego any friction at all it would be fine easy to rotate but it would be a constant annoyance when I bump the VFO then be moved away from a frequency I'd narrowed in on. Since I will forever be using VFO A, I do need it to feel natural. Gary KA1J Well, I'll jump in here. I had the same problem a few months ago when I assembled S/N 1889. The VFO A knob was way too loose no matter what I did. I had followed the instructions and installed one (1) felt washer under both the VFO A and B knobs. The B knob was fine. The A knob couldn't be adjusted to my liking. Then I noticed I had an extra felt washer (i.e., a total of three were included in the package). I added the second washer and life is good. I have it setup so I can spin it and get a nice smooth run (maybe 6 or 8 turns) as it freewheels but yet for my taste it's not too loose. Like everything else of course it's all a matter of taste. Two washers worked for me. If it was an accident (they included too many) then it was fortuitous in my case. If by chance you have a third washer install it and life will be good. 73/Patrick W7TMT ___ 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] Elecraft CW Net Report for December 22nd, 2008
Good evening, Happily there were a few folks I could hear. One for each net to be exact. It got to the point where I checked the antenna a few times after I had already checked if it had survived the storms. Yes, it is still there and there is not much ice on it either. I also programmed the CQ message into the rig so I could read while the radio was calling. This has never happened to me before. I don't know what the bands are doing because I could hear people on both of them before I started the net. Is everyone off doing things? I may be the only one home alone on a Sunday night. But some of you write that you only read my announcements and reports :) I am sure Eric would say something if we did not have an Elecraft net associated with my weekly epistles so something needs to change. Should we eliminate one of the bands? Move the times? Or should we get someone else to run them? Any input would be of interest. On to the lists = On 14050 kHz at z: NS7P - Phil - OR - K3 - 1826 On 7045 kHz at 0300z: W6ZH - Pete - CA - K3 - 657 Both of these stations were 599 to me but both gave me a 339 in return. It is very strange that I can hear an Oregon station so strongly on 20 meters. Pete is normally pretty strong to me on 40 meters so this is not unusual. I wonder what sort of odd propagation is occurring tonight. I hope it fixes itself before the Tuesday and Thursday night Fox hunts though. I would like to get at least one of the four foxes. The weather has calmed down. I got a little freezing rain, then a little sleet, and then snow for the rest of the day. Currently there is no snow falling but that is due to change. Luckily the winds are very mild. Last night they were gusting so there are bits of fir tree all over the snow. My stairs are mostly buried. The top of the snow is over the third step so I must tread lightly and count steps on my way down. Fortunately, if I fall the snow will bouy me up. Until next week have a very Merry Christmas and stay warm, dry, and well, 73, Kevin. KD5ONS (Net Control Operator 5th Class) - ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 VFO A tension
I was annoyed by the felt on felt hiss generated by rotation of VFO A and took about six attempts to find a compromise between hiss and rotation damping. Ideally I would prefer it to rotate less easily though. - 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-VFO-A-tension-tp1688263p1688878.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 VFO A tension
First I don't have a K3 being only a lowly K2 owner. So I'm throwing this out into the ring as a possible solution. In the Elecraft spirit I modified it by changing to a larger knob that I liked but was not happy with the tension. The knob was also unbalanced and if it came to rest at a certain position the rig would Drift. Two washers was to loose and 3 was way too tight and I could never find the right knob height for either combination. The local hardware store had what they called fender washers and were large enough to match the felt washer. The ideal combo was a sandwich of a felt-fender washer-felt. 73, Bob K2TK ___ 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] Elecraft CW Net Report for December 22nd, 2008
Hi Kevin, Remember that today was the solstice. The days will get longer now, keeping 20M open longer. When you first started to call at Z, you were readable, but you dropped as the net time progressed. I copied you 339 deteriorating to 229 fairly quickly. I may have been stronger because I had the quad pointed north at you and drove the K3 into an SB-200 at about 500W out. I was busy at 0300Z so that I couldn't try 40M. Let's see how it goes. Keep up the good work. 73, Phil, NS7P -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net]on Behalf Of Kevin Rock Sent: Sunday, December 21, 2008 7:51 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Elecraft CW Net Report for December 22nd, 2008 Good evening, Happily there were a few folks I could hear. One for each net to be exact. It got to the point where I checked the antenna a few times after I had already checked if it had survived the storms. Yes, it is still there and there is not much ice on it either. I also programmed the CQ message into the rig so I could read while the radio was calling. This has never happened to me before. I don't know what the bands are doing because I could hear people on both of them before I started the net. Is everyone off doing things? I may be the only one home alone on a Sunday night. But some of you write that you only read my announcements and reports :) I am sure Eric would say something if we did not have an Elecraft net associated with my weekly epistles so something needs to change. Should we eliminate one of the bands? Move the times? Or should we get someone else to run them? Any input would be of interest. On to the lists = On 14050 kHz at z: NS7P - Phil - OR - K3 - 1826 On 7045 kHz at 0300z: W6ZH - Pete - CA - K3 - 657 Both of these stations were 599 to me but both gave me a 339 in return. It is very strange that I can hear an Oregon station so strongly on 20 meters. Pete is normally pretty strong to me on 40 meters so this is not unusual. I wonder what sort of odd propagation is occurring tonight. I hope it fixes itself before the Tuesday and Thursday night Fox hunts though. I would like to get at least one of the four foxes. The weather has calmed down. I got a little freezing rain, then a little sleet, and then snow for the rest of the day. Currently there is no snow falling but that is due to change. Luckily the winds are very mild. Last night they were gusting so there are bits of fir tree all over the snow. My stairs are mostly buried. The top of the snow is over the third step so I must tread lightly and count steps on my way down. Fortunately, if I fall the snow will bouy me up. Until next week have a very Merry Christmas and stay warm, dry, and well, 73, Kevin. KD5ONS (Net Control Operator 5th Class) - ___ 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 SSB Contour Filter (reduce total bandwidth)
Hi Gary, Thanks for your interest. I am quite aware that the gurus at Elecraft are extremely busy and need evidence that firmware changes are beneficial. That is why I asked that those with the KRX3 should try my method and report their findings. This method is only good for evaluation but you don't want to tie up the KRX3 with it. The brain seems quite happy with a large chunk of bandwidth missing. We are not talking Hi-Fi but intelligibility. Try it and make your own decision. The K3 has a great CW receiver but SSB improvements seem to be on the back burner. 73 Tony VE3QF Gary Hvizdak wrote: Hi Tony, This sounds very cool and your approach most ingenious. However, it is likely that Wayne and/or Lyle would want sufficient evidence regarding the value of this sort of notch filtering, before expending the effort to implement it in firmware. In the mean time, your dual RX approach using the sub-receiver should provide you with a useable workaround method to accomplish such a notch. BTW, I just did a quick search online and found the following link … http://basic-programming.blogspot.com/2005/10/speech-recognition-formants-for-vowels.html … which implies that there is no such gap in the spectrum “for all vowel sounds”. 73, Gary KI4GGX ___ 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] KPA-1500 KPA-800
Seasons Greetings one and all.:-) The most intriguing thing about this thread is the deafening silence from Aptos. As much as we (which I think numbers quite a few) wish they were available, I think we have a long wait ahead before they appear. I just can't get my head around Ameritron (Mighty Fine Junk) by any other name as builders of quality equipment. I did love my Henry SS-750 in the truck, boy I had a lot of QSO's on 14.302.5 in 2000-2001 whilst driving and working in the US. Call me silly (or worse) I sold it rather than lug it back to Australia, I still regret that decision. Cheers All, Gary VK4WT (KD5NHL) K3 #679 I just got lost in thought. It was unfamiliar territory ___ 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 Power out
David Woolley (E.L) wrote: Jan Erik Holm wrote: Please Elecraft, make a FW change and limit the radio to 100W, thanks! Human nature being what it is, the likely result of this would be a large number of people refusing to upgrade their firmware any further and a significant grapevine message about how new purchasers can get increased power by downgrading the firmware. There is quite a significant lobby on this list for the radio to impose no restrictions in firmware. That's putting it well. Perhaps such features can be optionally enabled? It might satisfy both camps: those who want to get reminders not to do stuff they don't want to do, and those who to retain as much control as possible locally. Leigh/WA5ZNU ___ 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
