[Elecraft] Power amplifier for K2
For those who don't want to wait for the Elecraft linear amplifiers, here is an option that I pursued. I bought a Tokyo Hi-power amplifier the HL 1.2KFS that is rated at 750 watts output with typically 60 watts drive. But here is what I did, I asked Nobuki San, the chief engineer, to set up the amplifier to work with the K2 at 10 watts drive. He did this and now I get an easy 600 watts output. The amp uses 4 SD2933 power FET transistors. Since the transistor gain at 30 MHz is typically 23 dB, I knew that my little K2 could drive the amplifier nicely. He also included a second input attenuator so I can restore it to normal configuration and a special K2 keying interface at no extra charge. Nobuki San tested my amplifier using a K2 showing 10 watts CW in and 600 watts CW out.( I have a picture) The build quality is excellent. The protection circuits are bullet proof. Since each transistor is rated at 300 watts, the parts are loafing at 600 watts out. Operation is from 160 M through 10 M. I had it shipped air express direct from Japan and had it in 4 days at my house including the delay in customs. I believe the price will be comparable or better than the Elecraft amplifiers especially since you don't need KPA 100 amplifier in between the K2 and the amplifier.See my review at e-ham net. Just my $.02 worth Rich W3ACO ___ 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] Power amplifier for K2
Mine is not as elegant, but is cheaper. I am building a 140W amp kit from Communication-Concepts, and using The filter assembly kit from k5oor. For serious QRO I am working on a legal limit amp with four 4X150's. The power supply section is from An AM-6154 transmitter with a trashed cavity section. Both will drive to full output with the basic K2. Mike AI4NS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Richard haendel Sent: Sunday, November 19, 2006 7:57 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Power amplifier for K2 For those who don't want to wait for the Elecraft linear amplifiers, here is an option that I pursued. I bought a Tokyo Hi-power amplifier the HL 1.2KFS that is rated at 750 watts output with typically 60 watts drive. But here is what I did, I asked Nobuki San, the chief engineer, to set up the amplifier to work with the K2 at 10 watts drive. He did this and now I get an easy 600 watts output. The amp uses 4 SD2933 power FET transistors. Since the transistor gain at 30 MHz is typically 23 dB, I knew that my little K2 could drive the amplifier nicely. He also included a second input attenuator so I can restore it to normal configuration and a special K2 keying interface at no extra charge. Nobuki San tested my amplifier using a K2 showing 10 watts CW in and 600 watts CW out.( I have a picture) The build quality is excellent. The protection circuits are bullet proof. Since each transistor is rated at 300 watts, the parts are loafing at 600 watts out. Operation is from 160 M through 10 M. I had it shipped air express direct from Japan and had it in 4 days at my house including the delay in customs. I believe the price will be comparable or better than the Elecraft amplifiers especially since you don't need KPA 100 amplifier in between the K2 and the amplifier.See my review at e-ham net. Just my $.02 worth Rich W3ACO ___ 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] Power amplifier for K2
I also like the Tokyo Hy-Power amps. I have the HL200Bdx and it has worked wonderfully well with my K2. Also, Nobuki San is a pleasure to work with. These amps cost more than you typical CB type amp, like the RM Italy models, but are worth it and are true amateur band amps with proper band selection and filtering. I recommend them. 73, Bill - WA5PB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Richard haendel Sent: Sunday, November 19, 2006 7:57 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Power amplifier for K2 For those who don't want to wait for the Elecraft linear amplifiers, here is an option that I pursued. I bought a Tokyo Hi-power amplifier the HL 1.2KFS that is rated at 750 watts output with typically 60 watts drive. But here is what I did, I asked Nobuki San, the chief engineer, to set up the amplifier to work with the K2 at 10 watts drive. He did this and now I get an easy 600 watts output. The amp uses 4 SD2933 power FET transistors. Since the transistor gain at 30 MHz is typically 23 dB, I knew that my little K2 could drive the amplifier nicely. He also included a second input attenuator so I can restore it to normal configuration and a special K2 keying interface at no extra charge. Nobuki San tested my amplifier using a K2 showing 10 watts CW in and 600 watts CW out.( I have a picture) The build quality is excellent. The protection circuits are bullet proof. Since each transistor is rated at 300 watts, the parts are loafing at 600 watts out. Operation is from 160 M through 10 M. I had it shipped air express direct from Japan and had it in 4 days at my house including the delay in customs. I believe the price will be comparable or better than the Elecraft amplifiers especially since you don't need KPA 100 amplifier in between the K2 and the amplifier.See my review at e-ham net. Just my $.02 worth Rich W3ACO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.430 / Virus Database: 268.14.7/538 - Release Date: 11/18/2006 4:48 PM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Power amplifier for K2
Richard haendel wrote: For those who don't want to wait for the Elecraft linear amplifiers, here is an option that I pursued. I bought a Tokyo Hi-power amplifier the HL 1.2KFS that is rated at 750 watts output with typically 60 watts drive. But here is what I did, I asked Nobuki San, the chief engineer, to set up the amplifier to work with the K2 at 10 watts drive. He did this and now I get an easy 600 watts output. The amp uses 4 SD2933 power FET transistors. Since the transistor gain at 30 MHz is typically 23 dB, I knew that my little K2 could drive the amplifier nicely. Unfortunately, he can't legally sell such a model in the US. There's an FCC rule that the gain of an amateur service amplifier can't exceed 16 dB. Of course, it is permissible for a licensed amateur to modify a commercial amplifier for his own use, as long as it meets purity/stability standards. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 DSP
The problem that I ran into is this. The male pins on the pre-assembled DSP board for the 20 pin header are too long for the female mating header and they hold the board away from the header about a 1/16 inch or so. Normally this would not be a big deal if you only had the K2 without the 100 watt rf deck. With the 100 watt option, the speaker enclosure rubs right up against the DSP chip itself and actually pushes on the whole mother daughter board if it is installed that way. I solved the problem by cutting 1/16 or so off the male header pins on the pre-assembled board and now it mates flush with the female header. There is now about 1/32 or so clearance between the speaker and the DSP. Aargh! It appears the RoHS compliant 20-pin male connectors used in building the latest batch of DSPx modules were slightly longer than the previous, non-RoHS compliant connectors. Your solution, Joe, is correct. When you trim the pins, check for burrs and if present, use a small file, even a nail file or something similar, to remove the burrs. 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
[Elecraft] KAT100 problem
John- I worked SS contest last night (SSB) and had a similar problem running at 100+ watts with my K2-100 and the KAT tuner. I had a difficult time getting a match when in high power (anything above 11+ watts). When I transmitted, the KAT-100 would switch to Ant #1 for a second before switching to Ant #2 which is what I had selected (#2). #1 is my tri-band beam and #2 is my 135' dipole fed with open-wire feedline with a 4-1 balun near the KAT-100. I tried tuning at low power (10 watts or less) and everything worked as designed, even if I then cranked the power to 100 watts. So, when I would change frequency, I'd power down and tune for a good match, then power up and the problem disappeared. Seems the KAT-100 wants to tune at low power first...if I do high power first, I got the antenna switching and high SWR that you did. I can't explain it, I'm just glad I stumbled onto a solution because it was mighty frustrating - I even, perish the thought, considered putting my ICOM 706 MkIIG on line! 73, H Cary, K4TM K2-100 #5266 I love my K2! ___ 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] KAT100 problem
That certainly sounds like a problem induced by RF Feedback from the multiband antenna. Just as thought, perhaps a bit longer length of coax to your 4:1 balun might be in order. L B Cebik suggests a scheme for using open-wire feed - run coax through the wall to the outside and install a 1:1 ferrite bead type balun (note NOT a 4:1 balun) on the outside. A point of information that many folks seem to have trouble with is that the output of the balun must match the feedpoint impedance of the transmission line, and that has little to do with the characteristic impedance. Just because you are using a 600 (or 450) ohm feedline does not imply that a 4:1 balun should be used - in most cases, a 1:1 balun will do a better job across all bands. 73, Don W3FPR -Original Message- John- I worked SS contest last night (SSB) and had a similar problem running at 100+ watts with my K2-100 and the KAT tuner. I had a difficult time getting a match when in high power (anything above 11+ watts). When I transmitted, the KAT-100 would switch to Ant #1 for a second before switching to Ant #2 which is what I had selected (#2). #1 is my tri-band beam and #2 is my 135' dipole fed with open-wire feedline with a 4-1 balun near the KAT-100. ___ 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] Message 18 11/18 @12:59
Don, Met you at Dayton last May, demonstrating soldering. Now building a K2 and finished, but for this 'hopefully small problem' in Message 18 today. Ladst nigt, did find I did not install C19 on the 5v regulator circuit on Control Board. (The only part I had remaining was a 330 Cap blue)...think it was extra!??).. About to take the K2 apart (reluctantly) and proceed installing the C19..but thought I'd get you 'expert input' before I proceed. Any thoughts would be appreciated Sure would appreciate your input; if possible.. Sincerely..(thanks)! Dennis, K3nvi, York, PA ___ 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] KIO2 wanted
Does anybody have a KIO2, built or unbuilt, that they would like to part with? -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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 to Computer problem
Hello, I've a minor problem with K2 #4455 and KPA100 talking to my computer (N1MM). I'm using a known good cable between the rig and the computer, alas N1MM does not see the radio. It was an older KPA, but updated with the 1.10 chip (rev C). Any thoughts? Cheers, Julius n2wn ___ 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 :KPA100 upgrade and KAT100 problem
Hi John, Your problem is a mirror image I had with an upgrade here a while ago. On 80 and 160m bands the tuner would NOT tune 160 and 80m bands ...even into a Dummy load. It would go through a TUNE cycle...report a 9.9:1 SWR and lock into transmit. ( and not on a in band frequency) I eventually found ( after being told to think outside the square) that caps C80 and C81 in the KPA100 had been installed with .047uf caps instead of the 0.1uf they were supposed to have. Fixing that made the amplifier stable when attached to a resonant antenna, but I still had trouble with it not tuning and locking up in TUNE when attached to the KAT100 ( but once again only on 80 and 160m) .I subsequently found that the parasitic oscillation had destroyed the SWR bridge diodes in the KAT100...even though I had checked them earlier as being OK. Changing them and rechecking the balance of the bridge completely cured my problem. So.the main problem was in the input of the amplifier causing it to oscillate , and it in turn damaged the KAT100. The alteration to REV D in the amplifier made the problem of wrong componentry show itself ...so I would be checking the input area of your KPA100and double checking the bridge diodes in the KAT100 when you find it. There is actually nothing wrong with the modifications. I have altered 5 K2/100s here now and only been stung by that one with a prior component misplacement. Hope this helps? 73Ron ZL1TW -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.430 / Virus Database: 268.14.8/539 - Release Date: 19/11/2006 7:10 p.m. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2: Lower power on 12 10 meters
Hi Koret, No, you are very good indeed. 73 Johnny Siu VR2XMC now travelling at VK3 From: Koert Wilmink [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Subject: [Elecraft] K2: Lower power on 12 10 meters Date: Sun, 19 Nov 2006 21:37:37 +0100 Dear all, I successfully finished my K2 #05618 !! It is a great rig!! Just 1 question left: On all bands I've 15 watts output except on 12 10 meters, there I've 12 watts. Did I do something wrong here? 73 Koert -- HAMRADIO - when everything else fails! K2 # 05618 - 73 PA1KW ___ 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 _ 与世界各地的朋友进行交流，免费下载 Live Messenger; http://get.live.com/messenger/overview ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] RE :KPA100 upgrade and KAT100 problem
Ron - I suspect the same has happened to the KAT100. I did replace the diodes and it worked for a bit, but the problems quickly returned. Probably blew up the second set of diodes. Setting the KAT100 aside until the KPA100 behaves. In C80 and C81 I have caps marked 562. The revision D manual says these should be 472's, as do prior manuals. I then found the KPA100 Cap Kit Upgrade which replaced C80 and C81 with 562's (5,600 pF). Should I go back to 472's? You use .01 uF. Would that be better? How did you arrive at .01 uF for C80 and C81? All help greatly appreciated. 73 de K1ESE John Ron Willcocks wrote: Hi John, Your problem is a mirror image I had with an upgrade here a while ago. On 80 and 160m bands the tuner would NOT tune 160 and 80m bands ...even into a Dummy load. It would go through a TUNE cycle...report a 9.9:1 SWR and lock into transmit. ( and not on a in band frequency) I eventually found ( after being told to think outside the square) that caps C80 and C81 in the KPA100 had been installed with .047uf caps instead of the 0.1uf they were supposed to have. Fixing that made the amplifier stable when attached to a resonant antenna, but I still had trouble with it not tuning and locking up in TUNE when attached to the KAT100 ( but once again only on 80 and 160m) .I subsequently found that the parasitic oscillation had destroyed the SWR bridge diodes in the KAT100...even though I had checked them earlier as being OK. Changing them and rechecking the balance of the bridge completely cured my problem. So.the main problem was in the input of the amplifier causing it to oscillate , and it in turn damaged the KAT100. The alteration to REV D in the amplifier made the problem of wrong componentry show itself ...so I would be checking the input area of your KPA100and double checking the bridge diodes in the KAT100 when you find it. There is actually nothing wrong with the modifications. I have altered 5 K2/100s here now and only been stung by that one with a prior component misplacement. Hope this helps? 73Ron ZL1TW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2: Lower power on 12 10 meters
Koert, The internal gain of the K2 drops off a bit on the higher bands - 12 watts out on 12 and 10 meters is quite normal. Your 15 watts out on the lower bands says that there is no problem. 73, Don W3FPR -Original Message- I successfully finished my K2 #05618 !! It is a great rig!! Just 1 question left: On all bands I've 15 watts output except on 12 10 meters, there I've 12 watts. Did I do something wrong here? 73 Koert ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] RE :KPA100 upgrade and KAT100 problem
John, I had forgotten about C80 and C81 - yes change them to .0047 uF (472) - and change R19 and R20 to the new non-inductive resistors. I believe Ron made a mistake in his email - C58 and C59 which are nearby are the 0.1 uF (104). Here is what happened on C80 and C81 - for a short time after the 20 and 17 meter low power output problem, it was thought that the C80 and C81 capacitors had to be a higher value. Well as things turned out the problem was really that the resistor manufacturer had changed R19 and R20 (1.6 ohms) to an inductive design without notifying Elecraft. So a few (but very few) KPA100 kits went out with the 5600 pf capacitors. You should replace R19 and R20 at the same time just to be certain you have the non-inductive resistors. A note to Elecraft (mailto:[EMAIL PROTECTED]) asking for 2 E530102 4700 pF capacitors and 2 E500130 1.6 ohm 2 watt resistors should have the required parts to you in short order. While you are at it, get 2 1N5711 diodes PN E560004 just in case the high power oscillation zapped your KAT100 wattmeter diodes again. 73, Don W3FPR -Original Message- Ron - I suspect the same has happened to the KAT100. I did replace the diodes and it worked for a bit, but the problems quickly returned. Probably blew up the second set of diodes. Setting the KAT100 aside until the KPA100 behaves. In C80 and C81 I have caps marked 562. The revision D manual says these should be 472's, as do prior manuals. I then found the KPA100 Cap Kit Upgrade which replaced C80 and C81 with 562's (5,600 pF). Should I go back to 472's? You use .01 uF. Would that be better? How did you arrive at .01 uF for C80 and C81? All help greatly appreciated. 73 de K1ESE John ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] RE :KPA100 upgrade and KAT100 problem
The correct part number for the good 1.6 ohm resistor is E500177 per errata sheet for KPA100UPKT. 73, Ken K3IU -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Don Wilhelm Sent: Sunday, November 19, 2006 4:27 PM To: John Huffman; elecraft@mailman.qth.net Subject: RE: [Elecraft] RE :KPA100 upgrade and KAT100 problem John, I had forgotten about C80 and C81 - yes change them to .0047 uF (472) - and change R19 and R20 to the new non-inductive resistors. I believe Ron made a mistake in his email - C58 and C59 which are nearby are the 0.1 uF (104). Here is what happened on C80 and C81 - for a short time after the 20 and 17 meter low power output problem, it was thought that the C80 and C81 capacitors had to be a higher value. Well as things turned out the problem was really that the resistor manufacturer had changed R19 and R20 (1.6 ohms) to an inductive design without notifying Elecraft. So a few (but very few) KPA100 kits went out with the 5600 pf capacitors. You should replace R19 and R20 at the same time just to be certain you have the non-inductive resistors. A note to Elecraft (mailto:[EMAIL PROTECTED]) asking for 2 E530102 4700 pF capacitors and 2 E500130 1.6 ohm 2 watt resistors should have the required parts to you in short order. While you are at it, get 2 1N5711 diodes PN E560004 just in case the high power oscillation zapped your KAT100 wattmeter diodes again. 73, Don W3FPR -Original Message- Ron - I suspect the same has happened to the KAT100. I did replace the diodes and it worked for a bit, but the problems quickly returned. Probably blew up the second set of diodes. Setting the KAT100 aside until the KPA100 behaves. In C80 and C81 I have caps marked 562. The revision D manual says these should be 472's, as do prior manuals. I then found the KPA100 Cap Kit Upgrade which replaced C80 and C81 with 562's (5,600 pF). Should I go back to 472's? You use .01 uF. Would that be better? How did you arrive at .01 uF for C80 and C81? All help greatly appreciated. 73 de K1ESE John ___ 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] Peaking L34 (IF amplifier)
On Sun, Nov 19, 2006 at 09:19:34AM -0600, Tom Hammond wrote: David: For finding the peak, either will work, however, for finding the best Signal-to-noise ratio, the xanalyser will probably be better because it should allow you to see both the signal AND the background noise, so you can tell when he background noise is dropping faster than the signal. That's what I thought. That should be fairly easy for me to set up. The s/n ratio setting is usually only about 1/2-3/4 turn in from the point of max received signal. Run thru it a few times, to make sue you're seeing what you think you're seeing... and if you can't see it, try to hit the point of max. rx sig and then turn the slug in about 1/2 turn. Yes, that is what I did. Thanks. 73, Tom -- David Dawson A strong conviction that something must be done is the parent of many bad measures. -- Daniel Webster ___ 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] WA3WSJ: My Baby will be Leaving me!
Hello all, Well all good things must come to an end. My baby K1 will be leaving me and will be located in Ireland! Yes K1 #31 will be leaving the nest in a few days. I plan to use my KX1 for all my hiking trips. I did build the 4-band board for my (K1) and install and align it. Boy, my baby works so nice on four bands I almost hate to part with it-hi! So my baby will take a flight to Ireland and have a new home across the pond. Hey! Maybe I can work my baby as DX!!! I'm feeling the Empty-Nest-Syndrome already! I know it's going to a good home. 72, Ed,WA3WSJ ___ 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 Numvember 20th, 2006
Wow, who pulled the plug on propagation? On twenty meters things were going well and then all of a sudden it got very tough. On forty this held for the entire net. I ran for twenty minutes each net but did not do very well. On twenty I got a lot of partial calls and then nothing upon my query. Partials on twenty meters: ...BS and K1... and ...D. I think those are KJ7BS, K1EV, and K2HYD but I could not get a response. It is like the band simply shut off in the space of a few characters. AB9V, Mike, is normally strong. Tonight, on both bands, he was just above the noise. The signals I simply could not pick out were there but not even a letter to be copied. The noise was quite low though. Normally this is not a good thing. It is almost like the bands were absorbing the signals including the QRN. How odd! Ric and Rick were the two best signals. Ric was running 100 watts but KL7CW uses his KX1 each time he checks in. I was told by folks east of me there was QSB on my signal. I had some on VE6ITA but he was my best station on forty meters. Between working AB9V and John there was a gap of about five minutes. After I got Rick I kept calling for another ten minutes. On 14050 kHz at z: N0AR - Scott - MN - K2 - 4866 KL7CW - Rick - AK - KX1 - 798 AB9V - Mike - IN - K2 - 3993 VE3XL - Ric - ON - Ten Tec AL7N - Ed - AK - non-Elecraft rig On 7045 kHz at 0300z: AB9V - Mike - IN - K2 - 3993 QNI #80!!! VE6ITA - John - AB - K2 - 5384 KL7CW - Rick - AK - KX1 - 798 If you called and I did not answer I am sorry. I simply could not dig out many weak signals. If you are on the partial list I'd like to get an email from you describing my signal. At the end of the twenty meter net I was starting to wonder if my rig was working. I checked the needles on the tuner and they were bouncing merrily along. I then switched to another rig for the last minute just to see if I could work anyone else. No luck. However, there is always next week :) What did Orphan Annie sing? The sun will come out tomorrow. Bet your bottom dollar ... Good thing you're not here or you'd be suffering through my singing :) When life gives you lemons set up a lemonade stand. I think I'll go work on my notes for another gadget. If I can't work folks on the air I can always build another circuit! Thanks for trying folks. I'll be here next week. Same Bat time, same Bat frequency. 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] K2/100 Shuts Power Down
The K2/100 has been working very well for a couple of years but it has developed a problem. I was on 15 m. SSB and made a quick call and the rig made a noise, shut down, and restarted. It had shifted frequency and the fan was running when it came back on. I readusted the tPA. When I try to tune the radio at low power it tunes but will shut down very shortly. I thought I may have a bad diode in the SWR bridge but D16 and D17 seem to be fine when checked in the circuit. Is it necessary to remove them from the circuit board to check them properly? Anyone have any clues where I can start looking for the trouble. I have put the low power top and tuner back on the rig and it works just fine. I also tried the KAT100 and another tuner and the result is the same. 73, Pat W8FV/5H9PD ___ 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 Numvember 20th, 2006
Kevin, I tried checking in on 20 meters. I was the BS call you heard. I called several times at 5w and then pumped the K2 up to 15 watts. I had you 549 in Glendale, AZ, but was not able to make it back to you. I thought about kicking in my AL-800H for 200 watts with the K2 driving it, but the way the band was fading I decided against it. I was not available for the 40 meter net, sorry. Mark, KJ7BS Glendale, AZ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kevin Rock Sent: Sunday, November 19, 2006 8:44 PM To: Elecraft Subject: [Elecraft] Elecraft CW Net Report for Numvember 20th, 2006 Wow, who pulled the plug on propagation? On twenty meters things were going well and then all of a sudden it got very tough. On forty this held for the entire net. I ran for twenty minutes each net but did not do very well. On twenty I got a lot of partial calls and then nothing upon my query. Partials on twenty meters: ...BS and K1... and ...D. I think those are KJ7BS, K1EV, and K2HYD but I could not get a response. It is like the band simply shut off in the space of a few characters. AB9V, Mike, is normally strong. Tonight, on both bands, he was just above the noise. The signals I simply could not pick out were there but not even a letter to be copied. The noise was quite low though. Normally this is not a good thing. It is almost like the bands were absorbing the signals including the QRN. How odd! Ric and Rick were the two best signals. Ric was running 100 watts but KL7CW uses his KX1 each time he checks in. I was told by folks east of me there was QSB on my signal. I had some on VE6ITA but he was my best station on forty meters. Between working AB9V and John there was a gap of about five minutes. After I got Rick I kept calling for another ten minutes. On 14050 kHz at z: N0AR - Scott - MN - K2 - 4866 KL7CW - Rick - AK - KX1 - 798 AB9V - Mike - IN - K2 - 3993 VE3XL - Ric - ON - Ten Tec AL7N - Ed - AK - non-Elecraft rig On 7045 kHz at 0300z: AB9V - Mike - IN - K2 - 3993 QNI #80!!! VE6ITA - John - AB - K2 - 5384 KL7CW - Rick - AK - KX1 - 798 If you called and I did not answer I am sorry. I simply could not dig out many weak signals. If you are on the partial list I'd like to get an email from you describing my signal. At the end of the twenty meter net I was starting to wonder if my rig was working. I checked the needles on the tuner and they were bouncing merrily along. I then switched to another rig for the last minute just to see if I could work anyone else. No luck. However, there is always next week :) What did Orphan Annie sing? The sun will come out tomorrow. Bet your bottom dollar ... Good thing you're not here or you'd be suffering through my singing :) When life gives you lemons set up a lemonade stand. I think I'll go work on my notes for another gadget. If I can't work folks on the air I can always build another circuit! Thanks for trying folks. I'll be here next week. Same Bat time, same Bat frequency. 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] K2/100 Shuts Power Down
Just a total shot in the dark... but what is your SWR like on 15? It could be stray RF causing your power supply to shut down. I would check my grounds, and also maybe a different supply, or battery if you have one that will handle the power. Larry N8LP Patrick DalPorto wrote: The K2/100 has been working very well for a couple of years but it has developed a problem. I was on 15 m. SSB and made a quick call and the rig made a noise, shut down, and restarted. It had shifted frequency and the fan was running when it came back on. I readusted the tPA. When I try to tune the radio at low power it tunes but will shut down very shortly. I thought I may have a bad diode in the SWR bridge but D16 and D17 seem to be fine when checked in the circuit. Is it necessary to remove them from the circuit board to check them properly? Anyone have any clues where I can start looking for the trouble. I have put the low power top and tuner back on the rig and it works just fine. I also tried the KAT100 and another tuner and the result is the same. 73, Pat W8FV/5H9PD ___ 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] Elecraft CW Net Report for Numvember 20th, 2006
Hi, I'm new to CW world, but really like it. As a FISTS member, I do a few CW net around here... Ohio OSN and Georgia GTN... I would like to know at wich speed we could check in ??? I do only around 10-12WPM I'M living at Sherbrooke, Quebec... Thanks J-F VA2VYZ Kevin Rock a écrit : Wow, who pulled the plug on propagation? On twenty meters things were going well and then all of a sudden it got very tough. On forty this held for the entire net. I ran for twenty minutes each net but did not do very well. On twenty I got a lot of partial calls and then nothing upon my query. Partials on twenty meters: ...BS and K1... and ...D. I think those are KJ7BS, K1EV, and K2HYD but I could not get a response. It is like the band simply shut off in the space of a few characters. AB9V, Mike, is normally strong. Tonight, on both bands, he was just above the noise. The signals I simply could not pick out were there but not even a letter to be copied. The noise was quite low though. Normally this is not a good thing. It is almost like the bands were absorbing the signals including the QRN. How odd! Ric and Rick were the two best signals. Ric was running 100 watts but KL7CW uses his KX1 each time he checks in. I was told by folks east of me there was QSB on my signal. I had some on VE6ITA but he was my best station on forty meters. Between working AB9V and John there was a gap of about five minutes. After I got Rick I kept calling for another ten minutes. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2/100 Shuts Power Down
Sounds like a problem I have had. The power just folds for some reason. Well, I fixed it, but the problem is not what you may expect. My K2/100, SN #2511, has been working fine for years but it, too, experienced this problem starting a few months ago. I thought it was the power supply so I tried my battery power. This worked for a while. So I tried another power supply. This too worked for a short while but the problem recurred. A friend said look at the Anderson PP connectors and see if there is a loose connection or corrosion. So, I made and broke the connection between both ends of the cables multiple times to wipe the silver connectors clean. This worked for a while but the problem came back. What did fix the problem for more than just a short period of time was to hang my power cable from hooks to take the strain off the connectors. The weight of the cable was pulling on the connections creating an intermittent fault. When the K2/100 warmed up enough the power connection would fail, the rig would emit some odd noises, power cycle, and I'd not be able to transmit at full power. After hanging the cable this has not occurred again in twenty or more hours on the air. Now I can run from either my batteries or from a power supply at 100 watts with no difficulty for an hour or more of CW. Good luck, Kevin. KD5ONS On Sun, 19 Nov 2006 20:21:45 -0800, Patrick DalPorto [EMAIL PROTECTED] wrote: The K2/100 has been working very well for a couple of years but it has developed a problem. I was on 15 m. SSB and made a quick call and the rig made a noise, shut down, and restarted. It had shifted frequency and the fan was running when it came back on. I readusted the tPA. When I try to tune the radio at low power it tunes but will shut down very shortly. I thought I may have a bad diode in the SWR bridge but D16 and D17 seem to be fine when checked in the circuit. Is it necessary to remove them from the circuit board to check them properly? Anyone have any clues where I can start looking for the trouble. I have put the low power top and tuner back on the rig and it works just fine. I also tried the KAT100 and another tuner and the result is the same. 73, Pat W8FV/5H9PD ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2/100 Shuts Power Down
Kevin, I would speculate that you have a break in your cable near the APP connector rather than a failure of the APP connector itself. This is a result of cable flexing with soldered connectors. The wire will break at whatever point the solder has wicked back onto the cable. If you flex the cable, you can feel where the stiff part ends and the cable becomes flexible - in my experience this will occur about an inch from the APP connector. Of course this is one good vote for crimped APP connections rather than soldered, but I still prefer to solder mine. Beware of this potential problem and if it occurs, cut off about 1 inch of the cable and re-solder to the APP connector. A small knife blade or sharp flat-blade screwdriver can be used to remove the insert from the APP connector - just pry up the contact a bit and it should side out of the housing. 73, Don W3FPR -Original Message- Sounds like a problem I have had. The power just folds for some reason. Well, I fixed it, but the problem is not what you may expect. My K2/100, SN #2511, has been working fine for years but it, too, experienced this problem starting a few months ago. I thought it was the power supply so I tried my battery power. This worked for a while. So I tried another power supply. This too worked for a short while but the problem recurred. A friend said look at the Anderson PP connectors and see if there is a loose connection or corrosion. So, I made and broke the connection between both ends of the cables multiple times to wipe the silver connectors clean. This worked for a while but the problem came back. What did fix the problem for more than just a short period of time was to hang my power cable from hooks to take the strain off the connectors. The weight of the cable was pulling on the connections creating an intermittent fault. When the K2/100 warmed up enough the power connection would fail, the rig would emit some odd noises, power cycle, and I'd not be able to transmit at full power. After hanging the cable this has not occurred again in twenty or more hours on the air. Now I can run from either my batteries or from a power supply at 100 watts with no difficulty for an hour or more of CW. Good luck, Kevin. KD5ONS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2/100 Shuts Power Down
In addition to the other good comments here, check your in-line fuse to the KPA100. I've had those small cartridge-type fuses develop an intermittent after being a period of time. Sometimes its just a bad contact where it presses against the contacts in the holder, other times one of the connections between the fuse wire and the end contact opens inside the fuse. Very often the bad connection is highly temperature-sensitive so everything will seem okay for a while then suddenly it opens briefly until it cools again, then everything looks okay until you draw significant current again. Ron AC7AC ___ 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] Peaking L34 (IF amplifier)
It is done. Thanks. On Sat, Nov 18, 2006 at 08:09:35PM -0500, Don Wilhelm wrote: Ron is quite correct. If no peak can be discerned, just set the slug 1 to 1 1/2 turns in from the top of the can and be satisfied - alternately, as Ron stated, 'in the general vicinity of the peak'. 73, Don W3FPR -Original Message- It's important to remember that the effect of L34 on the performance of the K2 is as subtle as the peak. That is, the effect on receiver performance is negligible as long as L34 is set somewhere in the general vicinity of the peak. Ron AC7AC ___ 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 -- David Dawson A strong conviction that something must be done is the parent of many bad measures. -- Daniel Webster ___ 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
