[Elecraft] XV 432 questions...
Hi guys, although the XVTR seems to operate quite ok there are some issues: Local Oscillator Level: Max is 3.3 volts with L3 near initial adjustment but L4 and L5 are about two turns each out of the body. Osc. restarts ok. is this ok? Keying for filter adjustment: When keying the rig power slowly decreases. just a few percent. Overload protection behaves strangely: Rig is configured for use with K2 Jumper 8 removal results in power off from XVTR Keying the K2 triggers nothing. The LEDs don't begin to flash. any hint appreciated! Gerhard DH3FAW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] XV432, Q1...
Hi List, I soldered faster than I read. So Q1 is now installed in a common fashion without teflon spacer. Leads are clipped. What am I going to do now? If the teflon is just for spacing I would remove the Q, prolong the leads and install it without the teflon but spaced (I think the teflon won't fit then). Will this work or does the teflon some other magic? If the teflon does some other magic I think I have to order a new Q1... Have a nice weekend Gerhard ___ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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 receiver problem - AGC alignment, CAL S LO/HI
Hi list, hi all those who answered my first question. I had 4V at Pin5 U2. So I replaced R1 with a pot of 50k and set it to 3.65, 3.72 and 3.8V. It got better for sure. The difference between AGC on and off is in all cases noticable, but slightly. But I think it's significant, because... When I CAL S LO and exit it then immediately 1-2 bars of the s-meter start lighting. So I guess AGC sets in. And this should not be the case, I guess? Any idea? Have a nice day, Gerhard - Original Message - From: Don Wilhelm [EMAIL PROTECTED] To: GS [EMAIL PROTECTED] Sent: Wednesday, November 09, 2005 3:35 PM Subject: RE: RE: [Elecraft] K2 receiver problem Gerhard, If you have a K2 with serial number greater than 3000, the AGC adjustment pot is on the Control Board near the right end - the designation is R1. For K2 with SN under 3000, there is no pot, and R1 is a fixed resistor. Same procedure applies - change the value of R1 to set the AGC threshold. It is easy to substitute a temporary pot (50K will do fine) to make the adjustment - once the right value is found, solder in the closest value fixed resistor. In my experience, the fixed resistor that one would end up with will vary between 33K at the low end and 47k at the high end. BTW, if this receiver has worked properly before and suddenly developed this problem, look more closely for a failed component - it will likely be in the AGC area - see the control board schematic in the lower left corner. 73, Don W3FPR -Original Message- From: GS [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 09, 2005 9:48 AM To: [EMAIL PROTECTED] Subject: Ant: RE: [Elecraft] K2 receiver problem Hi Don, I can't find how to set the AGC threshold for optimum receiver sensitivity, neither in the manual nor is there any hint in the circuit. At least not for me ;-) Only threshold mentioned in the manual is for the NB... WHAT do I have to adjust to achieve max. voltage at U2 pin 5, ctrl board? Thanks!!! Gerhard --- Don Wilhelm [EMAIL PROTECTED] schrieb: Gerhardt, It sounds like the AGC Threshold is not set properly. I would proceed by first checking the alignment of the bandpass filters in Transmit mode (at 2 watts) and then set the AGC Threshold for optimum receiver sensitivity - with no antenna connected and AF and RF Gains set to max, adjust for the highest voltage at Control Board U2 pin 5 which yields no change in the audio noise when switching the AGC between OFF and ON. That will usually result in a voltage in the range of 3.65 to 3.8 volts at U2 pin 5. Set the S-meter end points (CAL S Hi and CAL S-Lo) after setting the threshold. If that does not cure the problem, then look for a problem in the IF receive chain - that will be where the signal tracing is required, follow the p[rocedure for receiver signal tracing in the Troubleshooting appendix of the K2 manual. 73, Don W3FPR -Original Message- got a K2 from another OM on my workbench. It's got a receiver problem and I just want to make sure I do the checks in the correct order and I'm looking for hints, if available! Thanks in advance! So here's the problem and what I want to do. It seems the receiver runs with handbrake on. So the s-meter shows 3 bars without an antenna but the rf gain is fully clockwise. I can reduce signals to zero (using RF gain) with this K2 which I can't using my own K2. So mine has a higher sensitivity. Any idea what's wrong? What I want to do: - s-meter alignment - I.F. amplifier alignment - (maybe band pass alignment) - signal tracing receiver and synthesizer Kind regards Gerhard DH3FAW ___ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.12.8/163 - Release Date: 11/8/2005 ___ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: K2 receiver problem - AGC alignment, CAL S LO/HI
OK, I did it for several modes and there are differences which I will leave for now. Aimed for 3.65 volts at U2 now. Result seems satisfactory to the ear. Today in the evening we will use a signal generator and a variable attenuator to test sensitivities of my K2 and this other one. If results should not be ok I'll let you now. Thanks so far for all the help! Gerhard - Original Message - From: Don Wilhelm [EMAIL PROTECTED] To: Gerhard Schwanz [EMAIL PROTECTED]; Elecraft@mailman.qth.net Cc: [EMAIL PROTECTED] Sent: Friday, November 11, 2005 12:37 PM Subject: RE: K2 receiver problem - AGC alignment, CAL S LO/HI Gerhardt, If you still have a difference between AGC on and off at 3.65 volts or lower, I would hesitate to go further, but you certainly can try it and see what happens - no real harm will come from a lower threshold voltage. After setting the threshold, then adjust CAL S LO first and then CAL S HI (the order is important, they interact). It is not unusual to have to do these several times in succession to get it correct. The low S meter response may vary with the filter width and mode, so check all modes with the widest filter for each mode. 73, Don W3FPR -Original Message- Hi list, hi all those who answered my first question. I had 4V at Pin5 U2. So I replaced R1 with a pot of 50k and set it to 3.65, 3.72 and 3.8V. It got better for sure. The difference between AGC on and off is in all cases noticable, but slightly. But I think it's significant, because... When I CAL S LO and exit it then immediately 1-2 bars of the s-meter start lighting. So I guess AGC sets in. And this should not be the case, I guess? Any idea? Have a nice day, Gerhard ___ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] T1 and remote control - works just fine
Hi list! Just these days I received my T1 kit and the next evening (abt. 4hrs) was his. No problems while building though a little bit confused over the picture showing the battery terminals for installation. First tests showed it well functioning. The next day I tried several different antenna setups with T1 and K1. Everything solved by the T1. At the end I added a remote control switch plus cable for portable use. 10m RG58 for RF and 10m RG174 for the remote function in parallel. Makes for a nice setup! Did QSOs on all 4 bands of my K1 with 10m vertical wire and 4 band-specific radials. Keep on building! Gerhard Schwanz DH3FAW http://www.gs-personal.de ___ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] Zu verkaufen: KNB1
Elecraft KNB1 Bausatz zu verkaufen, da doppelt bestellt... Inventur ok. 39EUR inkl. Versand in Deutschland. 73 Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] XV144 Overload test fails
Hi list! I thought I could do the last steps of my XV144. Heard my first 2m beacon today! And I have 20W output power. Everything is fine except: The overload test fails. It fails in a way that absolutely nothing is happening while performing the test. When removing the jumper J8 the XV144 sign goes dark. Then I set all transverter number switches to their off positions, removed the control cable and keyed the hf rig, a k2. No leds blinking. By the way: I use 5W max to drive the XV144. So the 1milliwatt rule does not apply. Is there something obvious that I am missing? Thanks! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] K1 Problem with Power Out on 30/40m
Hi there, I have a problem with my K1-4 on 30/40m. First I have to say that it was working before and I don't know what happened. Here is what I know: - Power out on 15/20 is ok. - Power out on 30/40 is 0.1W, probably less - I am losing the signal between DRV (1.5Vpp) and PA (0.1Vpp). Measured with Oscilloscope. - To be precise the signal is present at the base of Q7, but is extremely weak at the collector. - I checked Relays K7 and K8 manually. They work. - I checked T4. Ok. - I have a dummy load attached. Measured 50Ohms. - I checked L4-L6. 0Ohms. - Of course I checked solder joints/bridges What else can I do or check? What could be the problem? Thanks in advance! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] Antenna problem / phenomenon
Hi all, I have a new set of mobile antennas, pro am series with magnet mount. Most works just fine but I have one thing I don't understand. I have a K1 and a K2 and while the K2 (without tuner enabled) shows an SWR of 2:1 on the 30m antenna the K1 immediately reduces power to 0.1w and shows SWR 9.9. And what's most stunning, the KAT1 can't even reduce this 9.9... Any idea why and most important: what can I do? Thanks! Gerhard Schwanz DH3FAW http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] K1, KAT1 and remote Tuner
Hi all, I have a K1, ATU1 and a SGC-239 external tuner set up. And now when SWR is bad for a non optimal antenna the K1 will drop power to 0.1W and will stay there. So the SGC will not tune because it needs 2-3W. I tried ATU modes CALP and CALS. I didn't find this power reduction and resolution mentioned in the manual. So my question is: Is there a way to use external tuners that need more than 0.1W, namely 2-3W with non-resonant antennas? And if so, how? 73 Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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 SSB problem
Hi group! I have a little problem with SSB it seems. During the contest last weekend someone told me I had frequency modulation on my signal. Not knowing what this should mean I at least thought I would check the signal when bands are quieter. I just did. And although the audio sounds ok there is maybe a little problem. Sending a 1kHz audio signal the receiving station could hear the same signal at +1kHz and -1kHz with -20dB max. These signals should be at least -40dB, correct? Question. How do I fix this? Thanks! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] K1 RIT Mod!!!
Hi again, I just soldered a bit. Changing C7 is not to my satisfaction as it also increased the tuning range considerably. So C2 or L1 would have to be adjusted too. After a more thorough search in the web I found out that changing R4 and R5 on the FPB has the same effect on the RIT range but leaves the tuning (VFO) range as is. I changed the 10k resistors to 56k which gives me about +/- 700Hz RIT. I wonder why this simple method is not described in the manual... And I wonder why the side effect of changing C7 is not mentioned either. It would be nice to decide the RIT range during build time like the VFO range. Keep on building! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] K1 RIT Mod???
Hi there, I want my RIT to be +/-600Hz like in the K2. C7 has to be changed, to be smaller, says the manual. But how much smaller? Any idea or do I have to try? Thanks Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de __ Gesendet von Yahoo! Mail - http://mail.yahoo.de Mit Yahoo! Suche finden Sie alles: http://suche.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] K1 C62 and/or C63 missing
Hi, just made the inventory for my new K1 and I am missing exactly 1 capacitor, either C62 or C63. Now I am wondering if I could substitute one of these with another value, if they are not critical. I have 240nF (241) in stock. Will this one work in one of the places? Or can I parallel it with a 82pF? Thanks Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de __ Gesendet von Yahoo! Mail - http://mail.yahoo.de Mit Yahoo! Suche finden Sie alles: http://suche.yahoo.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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 Problem still exists, but some new measurements
Hi there, I'm still on page 43 in the process and I have now narrowed the problem area. You remember, I measured a negative voltage of 0.15V on J3+. Now: I removed Z1 and found the voltage measured at the collectors of Qs 1 and 2 to be -0.4V (J3+ is ok now). I don't know where it could come from. Shorting the collectors to ground via 1k resistor it takes 3 seconds to eliminate the voltage. I measure 0V. Removing the resistor it takes abt. 20 seconds for the voltage to go to -0.4V again. T2-4,5 are ok. The base of the transistors are ok, 0V. The emitters also, 0V. The body of T2 also has -0.4V. Any idea and testing procedures appreciated! Kind regards Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] KPA100 Problem still exists, but some new measurements
Well, um, yes. And I noticed another thing which led me think everything is fine. The voltage was there, even without power connected to the K2 at all. All is well now, I neglected the voltage. I will go on air tomorrow for on air tests. RS232 test is next now, then shield and final assembly. And thanks to all who helped!!! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de - Original Message - From: Mike Harris [EMAIL PROTECTED] To: Gerhard Schwanz [EMAIL PROTECTED]; Sent: Friday, February 04, 2005 5:14 PM Subject: Re: [Elecraft] KPA100 Problem still exists, but some new measurements G'day, Did you have a light shining on the PA transistors? J3+ on my KPA100 had -0.18V. Apparently something to do with illumination of the PA's. Well noted by others. Regards, Mike VP8NO - Original Message - From: Gerhard Schwanz [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Friday, February 04, 2005 10:42 AM Subject: [Elecraft] KPA100 Problem still exists, but some new measurements Hi there, I'm still on page 43 in the process and I have now narrowed the problem area. You remember, I measured a negative voltage of 0.15V on J3+. Now: I removed Z1 and found the voltage measured at the collectors of Qs 1 and 2 to be -0.4V (J3+ is ok now). I don't know where it could come from. Shorting the collectors to ground via 1k resistor it takes 3 seconds to eliminate the voltage. I measure 0V. Removing the resistor it takes abt. 20 seconds for the voltage to go to -0.4V again. T2-4,5 are ok. The base of the transistors are ok, 0V. The emitters also, 0V. The body of T2 also has -0.4V. Any idea and testing procedures appreciated! Kind regards Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] KPA100 voltage measurements AGAIN
Hi there, since my last thread has gone wild ;-) ... here comes a new one. I just checked the PCB again for any visual problems but didn't find any. And then I did the measurements again. I now have -0.1 to -0.15V on J3+ (yes, MINUS). Still zero V at TP1. Any idea how this voltage could get there? I don't dare to neglect this reading and proceed with the building... Using a 4.7k resistance I shorted J3+ to ground and almost immediately the voltage rises to 0V. Taking it away results in a slow drop to abt -0.1V. It looks like discharging/charging a capacitor. Kind regards Old message follows... =20 Good morning, I'm still in the process of building my kpa100. After my learning process concerning soldering :-) I stumbled upon some voltages. I'm on page 43 in the manual now and got some numbers a bit off the given values (PS is 14V). D13 154V U4 -27.4V TP1 0V J3+ 0.1V Are these numbers ok? Especially the last two? Another thing. The fan at this stage is a bit out of control. Calibrating tPA helps, but the K2 seems to not remember this setting. Also strange is that while setting tPA a relay can be heard switching. But maybe this is normal at this point in the process? Kind regards and keep on building... Gerhard DH3FAW Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] Bad KPA100 PCB?
Hello! I am just in the process of building my KPA100. And I discover more and more solder points on the PCB where the solder is not accepted. Scraping the pads a bit helps a bit but I don't think this is a solution. Some details. I don't know where in the process it started but right now I'm on page 15 soldering the capacitors. And it's nearly every third hole that doesn't work. The solder sticks to the leads or the iron. I use the same iron and solder as with the other 10 PCBs of elecraft that I have built. I contacted elecraft about this issue but I wanted to ask if others have this problem too? What can I do? 73 Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] Bad joints on KPA100 again - with photo...
Hi again, just took a photo. You see it seems to affect only a special kind of hole (see picture). You can see on the picture that other holes work well. http://www.gs-roboter.de/problem.htm Iron is temp regulated at 330 deg C. Same like before. I already changed iron and solder. To no avail. 73 again. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] Bad KPA100 PCB?
Don, as allways - ? - you were right! I increased the temp to 430deg C and here I go. (Didn't know my iron could go beyond 400, I mostly use 300-330 without problem.) It still takes a bit longer to solder but the hole fills smoothly. Off the hook - the building can go on. :-) Regarding manual: I read the part with the needed iron but I understood the high power is needed for power transistor installation and such... And since everything else worked the way I did it before... Thank you very much! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de - Original Message - From: W3FPR - Don Wilhelm [EMAIL PROTECTED] To: Gerhard Schwanz [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Friday, January 28, 2005 3:40 PM Subject: Re: [Elecraft] Bad KPA100 PCB? Gerhard, I have found the KPA100 is more difficult to solder than other Elecraft kits, but I believe it is bacause that PC board uses thicker copper than the other kits and is especially noticable when soldering to a grounded pad. I increase the temperature on my soldering station to 750 to 800 degrees F. (400 to 430 degrees C.) and have no problem. The KPA100 manual states that a low wattage 800 degree F. soldering iron is required. Try increasing the temperature of your iron. Judging by your photo, I can definitely state that your iron is not hot enough, and the pads that give you the most trouble are the ground points. 73, Don W3FPR - Original Message - I am just in the process of building my KPA100. And I discover more and more solder points on the PCB where the solder is not accepted. Scraping the pads a bit helps a bit but I don't think this is a solution. Some details. I don't know where in the process it started but right now I'm on page 15 soldering the capacitors. And it's nearly every third hole that doesn't work. The solder sticks to the leads or the iron. I use the same iron and solder as with the other 10 PCBs of elecraft that I have built. I contacted elecraft about this issue but I wanted to ask if others have this problem too? What can I do? 73 Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] KAT100 Question and a word for packing...
Hi all, just finished my KAT100 and wondered why the bottom cover didn't have to be scraped/sandpapered... Any idea? Otherwise it's working fine as far as I can tell this early in its life :-) Next is a KPA100... Regarding parts/inventory etc. I liked Christine's packs the most because they always contained everything they should! Often more. 73 Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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] Scan Problem
Hi, just been active in the arrl 10m contest and used scan on 28Mhz. Suddenly the K2 changed band (to 24 and 14Mhz) in the middle of scan. And it continued to scan on the other band... Any idea? It's been the first time I used the KIO2, but - this shouldn't matter, should it? Regards Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, 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 - no TX power problem
Hi, I have a problem: No TX Out on my freshly assembled K2. f = 7100 Vpwr = 5V Valc = 7,5V Power reading on LCD = 0.2W (desired 5W) Power consumption 440mA on 12,4V At TP2 on transmit I get a nice signal on my oscilloscope, abt 0.005 Vrms But behind TP2 the signal vanishes. All measurements are way too low, if present at all. At U10 Pin 4 there's only a short Jump to 5V and immediately back to 0 on keying. No HF detectable. I unsoldered the Diode D36 and checked for resistance. Infinite in both directions. Does this mean what I think? This D is broken? Do you need any more information? What else could I check? Thanks for any advice in advance! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
