[Elecraft] Low power on 20m using the KPA100 option
Dear all, last weekend I finished the KPA100 option, which is causing a little problem. Everything Is running well except power on 20m, where I just reach 50 Watts. The QRP output is not affected, so I am quite shure that the RF path to the antenna through the LPF is ok. Just to be shure I have checked all inductivities and capacities of the 20m filter. They are ok including the used core types of the inductivities. Somehow I am getting the impression, that on 20m the PA doesn't get sufficient driver Power. My signal reports on 20m have been ok, except the "missing 50Watt". This issue drives me realy crasy, because everything else is working ufb. Any suggestions? vy 73 de Martin, DL6KMR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
AW: [Elecraft] Low power on 20m using the KPA100 option
Hallo Vic,
Many thanks for the info. I thnink I am dealing with issue number 2).
By now I am quite shure that the driver part of KPA100 option is
draining power on 20/30m avoiding the last stage to reach full
Power.
I am going to ask Gary.
Regards
Martin
-Ursprüngliche Nachricht-
Von: Vic Rosenthal [mailto:[EMAIL PROTECTED]
Gesendet: Montag, 6. Juni 2005 13:49
An: Renardy, Martin {GY-E~Mannheim}
Cc: elecraft@mailman.qth.net
Betreff: Re: [Elecraft] Low power on 20m using the KPA100 option
Renardy, Martin wrote:
> last weekend I finished the KPA100 option, which is causing a little
> problem. Everything Is running well except power on 20m, where I just
> reach 50 Watts.
>
> The QRP output is not affected, so I am quite shure that the RF path
> to the antenna through the LPF is ok. Just to be shure I have checked
> all inductivities and capacities
> of the 20m filter. They are ok including the used core types of the
> inductivities.
If you are getting 10 watts output when you set the power control to 10
watts, check the current draw at this power level by tapping Display.
You should be drawing less than 3 amperes in this condition. Check also
at 11 watts, with the KPA100 on. It shouldn't be much higher. If it
is, you may have problem (2) below.
I found two problems in my K2/100 which caused slightly (in my case)
reduced output on 20 meters:
1) the bandpass filter tuning trimmers were both at maximum capacity.
Adding a few pf in parallel with them allowed the QRP portion of the K2
to develop more drive for the KPA100 with less current draw.
2) There is a known issue with some new KPA100s that the amplifier
requires abnormally high drive on 20 and sometimes 30 meters. This
causes high current draw in the low-power stage and inability to reach
full output. Gary at Elecraft was helpful to me about this
<[EMAIL PROTECTED]>.
--
73
Vic, K2VCO
Fresno, CA
http://www.qsl.net/k2vco
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AW: [Elecraft] Low power on 20m using the KPA100 option
Dear all,
I have got the answer from Elecraft that C80 and C81 in the KPA100 driver
section should be increased to 5600 pF. I had
already soldered 2 additional 4700 pF caps parallel to C80 & C81, which cured
the problem for me. I will reduce the
capacity of C80 and C81 down to 5600 pF later.
Vy 73 de Martin, DL6KMR
-Ursprüngliche Nachricht-
Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Renardy, Martin
{GY-E~Mannheim}
Gesendet: Montag, 6. Juni 2005 12:43
An: elecraft@mailman.qth.net
Betreff: [Elecraft] Low power on 20m using the KPA100 option
Dear all,
last weekend I finished the KPA100 option, which is causing a little problem.
Everything Is running well except power on 20m, where I just reach 50 Watts.
The QRP output is not affected, so I am quite shure that the RF path to the
antenna
through the LPF is ok. Just to be shure I have checked all inductivities and
capacities of the 20m filter. They are ok including the used core types of the
inductivities.
Somehow I am getting the impression, that on 20m the PA doesn't get sufficient
driver Power. My signal reports on 20m have been ok, except the "missing
50Watt". This issue
drives me realy crasy, because everything else is working ufb.
Any suggestions?
vy 73 de Martin, DL6KMR
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[Elecraft] Safe continuous power level of KPA 100/ transformer design
Dear gentlemen, I have two questions regarding the KPA 100 option: 1) What is the safe continuouse power level, which can the KPA 100 deliver for example for one hour? 2) How does the PA transformer work? Somehow the cores itself seem to be the primary input of the transformer? Regards 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
[Elecraft] KPA100/ Spring clip at rear shilding is colliding with RFC10
Dear all, I have a minor mechanical problem with one of the spring clips of the KPA100 Shielding, which should enshure good electrical contact with the K2 case. The spring clip at the rear side od the shielding is colliding with RFC10, which is soldered between the antenna connector and ground. Because space is narrow it's difficult to move RFC10. Has sombody solved this "problem". Greetings vom south-west germany 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
AW: [Elecraft] KPA 100 Power Calibration SWR Question
Hallo Jonathan, I have done the calibration last weekend and I am getting a SWR of 1.0-1 on all bands. I have used the build in dummy load of my MFJ 949E antenna tuner. I would blame the dummy load too. You can maybe carefully use a tuned antenna at low power levels just to verify? Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Gottlieb, Jonathan Gesendet: Mittwoch, 8. Juni 2005 16:08 An: elecraft@mailman.qth.net Betreff: [Elecraft] KPA 100 Power Calibration SWR Question I have just completed the Power Calibration (R26 andf R27) on my KPA100. The SWR shows 1.0-1 on 40 and 80M, but then goes up from there. It is 1.5-1 on 10m and power output as indicated on my external power meter shows power declining as the SWR is increasing. I am using an MJF 264 dummy load which is not the best. Any thoughts? Could I just be seeing a poor load? Jonathan Gottlieb WA3WDK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] KPA100
Hallo Brent, I am member of the "low power group" ;-)), which have had some problems with low power from The KPA100 on 20 and 30m. If you are ending in a high current message on 20 not reaching the 100+Watts, than you maybe can join us. My cure has been to increase C80, C81 in the PA driver stage. The official value is 5600 pF. Regards Martin, DL6KMR -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Brent Sutphin WB4X Gesendet: Samstag, 11. Juni 2005 21:15 An: elecraft@mailman.qth.net Betreff: [Elecraft] KPA100 I recently built and installed a KPA100 on my K2. It works great but today on twenty meters I got a high current message and the amp shut down. I have the driver current set for 4 amps. Any suggestions? Brent WB4X ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] KPA100 Hi Current on 30M
Hallo Jonathan, Welcome to "the low power group". I was running into the same problem a couple of days ago. If the problem is just on 20m/30m and your are shure that you didn't mixed the gray and black toroid cores, than add two capacitors parallel to C80, C81. I have tested it with an other 4700 pF, which I soldered parallel to C80, C81 at the bottom of the PCB. The problem has gone and I have now 115 Watts Also on 20! The official fix is to increase C80, C81 to 5600 pF. Greetings vom Germany Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Ken K3IU Gesendet: Sonntag, 12. Juni 2005 20:29 An: 'Gottlieb, Jonathan'; elecraft@mailman.qth.net Betreff: RE: [Elecraft] KPA100 Hi Current on 30M Hi Jonathan: You may well have joined "the group." But first... Make sure that you can get at least 10 watts output on all bands with the KPA100 turned "Off" in the menu. Then you should recheck the power calibration procedure for the KPA100 unless you are very confident that it is correct. If both of those check out OK, then you are probably experiencing the same thing that several others (with you I think there are now 9) that are having pretty much the same problem. Elecraft and the designer are working on the problem and I'm sure there will be a solution soon. In the meantime, one of the things that has worked for some is to increase the capacitance at C80 and C81 between T1 and the bases of the PA transistor. Some have changed to 5600 pF, some have added another 4700 pF, and I ended up adding 2200 pF. One ham in England who had the problem replaced C80 and C81 with new 4700 pF caps from Elecraft and the problem remained. He then purchased locally and installed replacement new metal film resistors to replace R19 and R20 and new 4700 pF caps to replace C80 and C81 and the problem was completely resolved for him. It suggests that the provided resistors may have enough inductance to resonate with the 4700 pF cap and create a "trap" at around 10 MHz. I encourage you to report the problem to Gary <[EMAIL PROTECTED]> so that they are aware that there is another builder with this problem. 73, Ken K3IU -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gottlieb, Jonathan Sent: Sunday, June 12, 2005 12:12 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA100 Hi Current on 30M Almost finished with my KPA100. Power output is 100 watts on all bands except 30M where I get hi current display over 55 watts. Any suggestions? Jonathan Gottlieb WA3WDK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] stranger than real life (really metric v imperial)
Now I understand why the english and scots and wesh are sticking to the pint!! A pint is bigger and so you are getting drunken faster than in Germany. And time is money ;-). The big danger is mixing the metric with the non metric system. Maybe you know that one of the NASA mars probes has been shot beside the planet mars because of mixing metric and non metric. Next time the space shuttle will maybe land on my antenna!?? Martin, DL6KMR -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Andy McMullin Gesendet: Montag, 13. Juni 2005 09:36 An: elecraft@mailman.qth.net Betreff: Re: [Elecraft] stranger than real life (really metric v imperial) -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 12 Jun 2005, at 03:10, W3FPR - Don Wilhelm wrote: > They call it the 'English' system, but even the English folks now > measure > things in the metric system - only we Americans are the holdouts to > the more > convenient and sane metric system. Not quite right. Us English (and the Scots and Welsh) still use the imperial system for the important parts. Beer still comes in pints, we drive at miles per hour, our doors are six foot six high and so forth. Even when we are forced by Europe to use metric units, we mix things -- for example I recently bought stuff for a building project which included a two metre length of 2 by 1 wood (where the cross section is still measure in inches) and a one metre section of 2 inch (diameter) plastic piping. It is true that we've been forced to weight foods in metric but that has led to weird things like it being (technically) illegal for your butcher to offer sausages at a price for a pack of six -- he has to offer them at so much per kilogram!! The petrol stations are forced to sell us petrol and diesel by the litre not the gallon -- but that was a government trick to avoid us noticing that the price had gone up fivefold. Funnily enough most gas tanks still hold 10 gallons not a round number of litres. The good news is that it is still illegal (in England anyway) for road signs to be installed that are in metric units and not including their imperial equivalent. Bridge heights are still in feet and inches and even if some Europe loving authority decided to use the French system, they have to put the imperial distance too -- or suffer quite a large fine. As someone else mentioned, I've used metric units for scientific work for most of my life, but I still think of temperature in Fahrenheit, distance in miles, fuel consumption in miles per gallon, meat in pounds and beer in pints -- the latter most often!! - -- Regards Andy, G8TQH http://www.rickham.net/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (Darwin) iD8DBQFCrTdmGhQb5Xlw1yURAuP3AJ9LtoAgpImmCbyNAsJEMnEyFXqIRwCeNs3w hzUB9zTWu/uDhMjR1LOrUdg= =5akb -END PGP SIGNATURE- ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2/100 and KPA100 review in QST
Dear all, would it be possible to get the K2/100 and KPA100 review from QST as PDF file? Many thanks in advance. Vy 73 de DL6KMR, 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
[Elecraft] Problems because of filter switch during CW operation K2
Dear KW2 CW operators, yesterday evening I was running into a problem during CW operation with the K2. I called CQ using the 1.5 KHz CW filter on 20m and got response from a couple of US stations. The signals have been quite weak ( RST 33 ), but I have managed to copy a call sign and to give answer. Because of sudden QRM I switched to the 700 Hz filter but lost the signal. I have had big difficulties to "find" the signal of the US station within the 700 Hz filter. So I switched back to the 1.5 KHz filter and lived with the QRM. How can I align the CW filtes, so that I can switch to the narrow CW filters without losing the signal? By the way: It was very impressive again, how powerful CW is under difficult conditions! Regards Martin, DL6KMR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] Problems because of filter switch during CW operation K2/ Filter FL4
Dear all, I ran through the K2 filter aligment considering all your tipps and tricks. I also adjuest the reference oscillator on the control board again. My filter bandwidths are 1.5 kHz, 700 Hz, 500 Hz and 200 Hz (Filter FL1 to FL4). I have used Spectrogram to align the filters. The settings are matching with zero beat tests on a carrier. Now Fliter FL1 to FL3 are working perfectly. I can switch through the filters and the tuned signal stays with maximum amplitude in the filter with minimum frequency change. The strange thing: Filter FL4 was not working. So I have set it's bandwidth to 2 kHz and analysed the passband By tuning over a carrier observing the peak in spectogram. I have seen, that the center frequency of FL4 is different from FL1 to FL3! How can that be, because the Filter settings FL1 to FL4 are controlling the same electrical filter?!? Regards 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
AW: [Elecraft] Why is K2 so easy to send cw with?
Hallo Tim, it's a little bit imagination. The K2 is realy a nice "CW machine" mainly because of the variable filters and the CW memory. Sending wise I don't see a difference from any other rig. But I agree: Since I am operating the K2 I am enjoying CW again. Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Tim Logan Gesendet: Dienstag, 21. Juni 2005 07:18 An: Elec-Reflector Cc: John Kuklewicz N7ZN Betreff: [Elecraft] Why is K2 so easy to send cw with? Hello fellow Elecraft addicts - I've been using my Icom 706 a lot lately while I build the amp for my K2. As an 18- 20wpm cw novice I seem to have FAR more difficulty SENDING cw on the 706 then I do on the K2. I could swear it's not my imagination. After 30min on the 706 - a switch over to sending on the K2 makes it feel like I just "jumped into a Formula I from an old truck." Are there factors that make one radio far easier to send cw with than another or is it just my imagination? If so - what are the factors that affect how sending cw "feels"? Thanks folks. 73/Tim NZ7C (non engineer electrical nimno) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] SSB K2 sound good!!
Dear all, this morning I have spoken with a german guy who is living on a greek island (maybe with the sirene women?!?) on 20m and was able to record my transmission and he replayed it to me. So the first time I heard my own trasmission using the K2 and it is realy very good!!! The K2 has a clear good modulation. Regards Martin, DL6KMR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
AW: [Elecraft] K2 Power Consumption
Hallo Colin, You are right! 300 mA is too high. I have been somewhere between 150 mA and 200 mA. How do you measure? With the internal Amp meter? Compare with external A-Meter. Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von m1bnw Gesendet: Friday, June 24, 2005 8:23 AM An: Elecraft Forum Betreff: [Elecraft] K2 Power Consumption Dear All, I have reached the Alignment and Test, Part II of the construction of my K2 4149. When I power up the quiescent current at a supply of 13.7v is 300mA. This seems high to me when I read what is quoted in the K2 Manual. Can anyone remember what their current figures were at this stage in the construction ? I seem to remember having about 150mA for the first stage of the building. I have checked some on board voltages and all seems fairly close the quoted figures. I have not yet started any of the alignment tests as this power figure bothers me. Nothing seems to be getting too hot either. My power supply does have a built in current meter so the figures are accurate. Would appreciate any feed back. Regards Colin m1bnw ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] K2 SSB mode and T/R switch time
Hallo Mike, The only parameter I now is the tr-Delay Parameter in the Menue, but it just should affect CW mode. I do not have any Longer delay. Regards+ Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von [EMAIL PROTECTED] Gesendet: Tuesday, June 28, 2005 3:21 PM An: elecraft@mailman.qth.net Betreff: [Elecraft] K2 SSB mode and T/R switch time Hi, I'm not sure if anyone else has noticed this but the time for my K2 to switch from transmit back to receive in the SSB mode seems a bit lengthy. It's probably in the 200-400 mS range which is annoying. Am I missing a menu controlled item or is something wrong? Any insight would be appreciated. After logging 147 contacts during FD at the 5W level, this issue became very annoying. Thanks Mike, WA1SEO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] Ser 4993 - First Problem
Dear all, this is an important point, because I became a little bit sweaty after installing the LCD, when I realized, that I don't have access to U1 anymore. In the manual there should be a big warning: "Check soldering of U1" before installing the LCD itself. Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von [EMAIL PROTECTED] Gesendet: Thursday, June 30, 2005 1:00 PM An: [EMAIL PROTECTED]; elecraft@mailman.qth.net Betreff: Re: [Elecraft] Ser 4993 - First Problem In a message dated 30/06/05 03:24:07 GMT Daylight Time, [EMAIL PROTECTED] writes: Applied power for the first time: heard the relays engage backlight came on Display is blank, nothing whatsoever in the display turned rig off and back on, no relays this time, but still nothing in the display Reply:-- Tim, The item you should check is that you have soldered pin 1 on the K2 Front Panel LCD driver U1. I did miss this when I built my K2 as did a number of others. Not sure why this happens. Pin 1 of all IC on the PCBs are different being a circular copper track, though that is no answer why it is missed in the soldering. The pin 1 on front panel U1 can be inspected with the board removed. However due to the front panel switches and the LCD display positioned above it is rather difficult to get a soldering iron in to solder the pad. Some builders have removed the LCD to access the pad. As I had concerns in damaging the LCD in the removal, ended up cutting a tiny "V" out of the plastic corner on the lower edge of the IC socket, just enough to get a very small soldering iron bit to the pad there and solder the pin. The IC socket plastic removal is not seen as it is hidden when assembled. Bob, G3VVT K2 #4168 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] Magnetic Loop MFJ 1788
Dear all, does anybody knows the MFJ magnetic loop antenna MFJ 1788? Regards Martin, DL6KMR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
AW: Re [Elecraft] KPA100 - left, right, counter clockwise?
Hallo Allen, I have had the same problem when building the KPA100. The orientation of the pot has not been defined and so you realy can't say which the right direction is. If the clock would be transparent without digits you would run into the same problem. Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Allen C. Ward Gesendet: Tuesday, July 05, 2005 2:27 PM An: elecraft reflector Betreff: Re [Elecraft] KPA100 - left, right, counter clockwise? One would think that clockwise for a pot would always be the same. A clock does not turn counterclockwise just because one looks at it from the back. My left arm is always my left arm no matter the orientation of a viewer. A manual writer should say: " the end of R6 on your left as looking at the circuit side of the PCB" etc. This is a little long winded. I built a KPA100 and had no difficulty understanding the instructions so Elecraft makes pretty good manuals for the most part. The manual for the DSP could stand some improvement. Allen ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] knob
Hallo Dan, you can create a rule within outlook, which moves every message containing the word "knob" into the bin. Is the term "knob" something naughty? Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Dan Allen Gesendet: Tuesday, July 12, 2005 3:43 PM An: Geoffrey Mackenzie-Kennedy; [EMAIL PROTECTED] Cc: Elecraft Discussion List Betreff: Re: [Elecraft] knob Does anyone know if there is a version of Outlook that has a "knob" filter? Dan Allen KB4ZVM K2 S/N 1757 - Original Message - From: "Geoffrey Mackenzie-Kennedy" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: "Elecraft Discussion List" Sent: Monday, July 11, 2005 1:49 PM Subject: Re: [Elecraft] knob > > Don, W3FPR wrote: > >> Of course there are those who still advocate the broccoli ring >> solution >> > > - > > Keep talking Don, there is a field of the stuff here, nice and green > looking for good homes > > 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 mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] K2/100 Assembly
Dear Frank, As far as I remember you will build and test the K2 first without options. If everything is ok, you will install for example the KSB2. During that installation you will have to remove solder bridges and a capacitor, but this is described in the manual of the KSB2. Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Frank Mayer Gesendet: Wednesday, July 13, 2005 2:11 PM An: elecraft@mailman.qth.net Betreff: [Elecraft] K2/100 Assembly I am going to order a K2 with a number of the options. I have also downloaded and read the assembly manual for the K2 as well as the KSB2 board for example. The assembly and installation instructions for the KSB2 instruct you to disassemble part of the rig for the installation of the board. Is there any coordination instruction given for building the rig when you are installing the options at the time of rig assembly? Frank WY3D ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] Problems = Alignment Part III K2 #4993
Hallo Tim, I don't think that you do have problems with the power supply. How do you run the power test? Do you use a dummy load with a SWR/ Powermeter? Do you align the band filters for every band? Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von NZ8J Gesendet: Thursday, July 14, 2005 6:18 PM An: elecraft@mailman.qth.net Betreff: [Elecraft] Problems = Alignment Part III K2 #4993 Well, everything went fairly well up to the part III alignment. I was able to get slightly over 2 watts during the first few steps of the alignment. However during the next steps, I get higher current than I should, and the max out is about 5.5 watts even with the current cal set to 3.5 amps. 3 watts = 1.1 amp 4 watts = 1.8 amps 5 watts = 2.4 amps I have checked and swapped power supplies, changed power cords, and set current cal to 3.5 amps, but the max output seems to be about 5.5 watts. I get "Hi Current" indication even with the current cal set to 3.5. I would appreciate any insight, I have visually checked everything of course and don't see any obvious problem.. I looked at the troubleshooting section , but it seems pretty generic, I'm hoping someone might have run into this problem before and could point me to the right area to check...Any ideas? Thanks Tim NZ8J ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] KDSP option
Dear all, I am using the K2 DSP option from the beginning, which is (technically) working fine. But I am constantly switching it off, because it's swallowing weak signals (especially CW signals). I am using the default values of the DSP option. Does anybody has experience how to use the DSP digging weak signals out off the noise? Best regards Martin, DL6KMR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
AW: [Elecraft] Oscilloscope
Dear all, those tutorials are excellent! By the way: You can hardly expect that you can easily use a oscilloscope without training and reading documentation. And to make it even worse: There are much more complicated instruments like network analysers or logic analysers, where you have to study electrical engineering in order to understand what you are measuring at all! Regards Martin, DL6KMR -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Don Wines Gesendet: Friday, July 22, 2005 6:40 PM An: elecraft@mailman.qth.net; [EMAIL PROTECTED] Betreff: Re: [Elecraft] Oscilloscope All the suggestions in this thread are good. However, if you are looking for an excellent tutorial on the use of O'scopes here are links to Paul Harden, NA5N's, 2 part tutorial "The Handyman's Guide to Ocilloscopes" in .pdf version. http://www.aoc.nrao.edu/~pharden/hobby/Scope1.pdf http://www.aoc.nrao.edu/~pharden/hobby/Scope2.pdf I keep a copy handy at my bench! Don, K5DW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
AW: [Elecraft] Help: 20m died on K1 #1866
Hallo Guy, The best way I think is to do a signal trace from the antenna jack through the 20m path towards the load speaker. You may use A simple x-tal signal injector in order to have a signal generator. Everythink else is just guessing! Regards Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von [EMAIL PROTECTED] Gesendet: Thursday, July 28, 2005 3:31 PM An: elecraft@mailman.qth.net Betreff: [Elecraft] Help: 20m died on K1 #1866 Transmit on 20m abrubtly ended after weeks of being operational.. No output and minimal receive . Other 3 bands are operational with expected receive sensitivity and transmit output power. 20m receive sensitivity has always "seemed" inferior to other bandsI always assumed it was the antenna. Here's what I've done: 1) I resolder all points on the filter board. All voltages on filter board are with in range. All resistances on filter board check with manual requirements. 2) The transmit-mode DC voltages (pg. 46 manual) are all within range and the same as the original test measurements during the first alignment and tests. 3) Confirmed b1-b4 band assignments were correct. Any help in steering me to where and what to do next would be appreciated. Thanks, Guy N7UN/2 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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
