[Elecraft] K2 (#4498) and KSB2 performance
The KSB2 option was installed last saturday and tested during all this time. It was working OK by the book (!) and the only objection was the gain that was too just, very limit, the max output in SSB (upper or mower SB) was only 6 to 8 watts pep (as seen on the scope inh two tone test). I found on the web the paper from John KI6WX (July 18, 2002)relative to diverses modifications and improving the KSB2 performances. I did not do the filter bandwith modif (as I was very happy with what I got !)but I did the increased gain and reduced intermod modif. it was finished this morning and the results are as John said in his paper. Around 5/6 db increased output and also as a bonus an intermod distortion lower than I got before !I still did not make the ALC time constant change. I will may be do that when I used the K2 for PSK transmit. Thank to John, wayne Eric and the gang for their help ! 73 F5UL/Robert ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] OT: Repairing Astron RS-20
Harold, A couple of suggestions in repairing your Astron. You MUST discharge the large filter capacitor before removing or replacing the LM723 regulator IC (this is the part you will likely have to replace). The RS-20 uses 2N3055 pass transistors, but you can also use 2N3771 (which is what Astron has been using on newer units). Test the pass transistors, IF you are replacing the LM723 (testing with a VOM is covered in the KBT web site - below) Excellent reference web site for understanding, troubleshooting and repairing linear power supplies http://www.kbt-dc-supplies.com/index.php Dave Metz, WA0AUQ's article What Inside Your Astron? http://www.seits.org/features/pwrsup.htm This is a very easy repair, and it one of the Amateur technical basics (audio, power, antennas) that I teach new amateurs. Astron schematic diagrams http://www.repeater-builder.com/rbtip/astron-index.html Greg w9gb Message: 11 Date: Mon, 13 Dec 2004 09:47:45 -0600 From: James N5TOG Subject: [Elecraft] OT: Astron RS 20 schematic Would some one have a schematic for an Astron RS 20 power supply they could email me or know were i can find it. Sincerely Harold N5TOG K2 1587 ___ 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] Anyone using a K2 for RX and another TX?
yes yes yes... Hi Mike, at this VERY moment I am using my k2/100 with my icom 756pro trying to get the VU4.. ( rare dx)... the K2 noise blanker helps me more decipher the esp weak signals from the VU4 on 20 meters. I have not established a very decent way to mute the k2 when transmittingother than use the K2 second receive antenna input ( on the k160rx) and transmit into a dummy load at the same time as I let loose the KW on the 756into a different antenna. The other missing element is that I cannot receive on my better antenna as it is 150 feet closer to the offending power line poles So I am transmitting with the big beam and listening on my old classic 33 with the K2. I have fitted my 756 pro with a tap just after the t/r relays, so I an share the antenna selected, however as I mentioned I can't even use that function, since that antenna is different for each rig !!! now just waiting for propagation to open up in the midwest RF BLACK HOLE. I briefly tried to use the test mode to disengage the TX , but that seems to function in cw only. Better ideas are welcomed bill At 06:58 PM 12/13/2004, you wrote: Hi, I was wondering if anyone is using the K2 just for the receiver and using some other transmitter with it in a transceive mode. Most of us probably (had or ) still have one of the big 4 name transceivers and I was thinking about using the K2 in conjunction with another radio to take advantage of the 100W power or AM mode. Your thoughts are appreciated. Thanks in advance. 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
RE: [Elecraft] OT: Repairing Astron RS-20
Greg: Wish I'd had these (first two) references back YEARS ago when I was first learning about linear supplies.. would have made things a LOT easier. These should be MUST HAVE links for all hams! 73, Tom N0SS At 03:15 AM 12/14/04, you wrote: Harold, A couple of suggestions in repairing your Astron. You MUST discharge the large filter capacitor before removing or replacing the LM723 regulator IC (this is the part you will likely have to replace). The RS-20 uses 2N3055 pass transistors, but you can also use 2N3771 (which is what Astron has been using on newer units). Test the pass transistors, IF you are replacing the LM723 (testing with a VOM is covered in the KBT web site - below) Excellent reference web site for understanding, troubleshooting and repairing linear power supplies http://www.kbt-dc-supplies.com/index.php Dave Metz, WA0AUQ's article What Inside Your Astron? http://www.seits.org/features/pwrsup.htm This is a very easy repair, and it one of the Amateur technical basics (audio, power, antennas) that I teach new amateurs. Astron schematic diagrams http://www.repeater-builder.com/rbtip/astron-index.html Greg w9gb Message: 11 Date: Mon, 13 Dec 2004 09:47:45 -0600 From: James N5TOG Subject: [Elecraft] OT: Astron RS 20 schematic Would some one have a schematic for an Astron RS 20 power supply they could email me or know were i can find it. Sincerely Harold N5TOG K2 1587 ___ 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] PLL Reference Oscillator Range Test
I cannot find the trouble shooting section in the Appendix that addresses how to correct out of range numbers...I just can't find it. Maybe I need another cup of coffee ;) Here is what I have: Ref High Freq. 12,100.14 Ref Low Freq. 12,090.88 That give me a range of 9.36...just outside of the 9.8 low figure. Any info would be greatly appreciated. Thanks, 72/73 Ann AB1DR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] OT: Repairing Astron RS-20
Ditto! Great post Greg! - Original Message - From: Tom Hammond [EMAIL PROTECTED] To: G. Beat [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Tuesday, December 14, 2004 8:44 AM Subject: RE: [Elecraft] OT: Repairing Astron RS-20 Greg: Wish I'd had these (first two) references back YEARS ago when I was first learning about linear supplies.. would have made things a LOT easier. These should be MUST HAVE links for all hams! 73, Tom N0SS At 03:15 AM 12/14/04, you wrote: Harold, A couple of suggestions in repairing your Astron. You MUST discharge the large filter capacitor before removing or replacing the LM723 regulator IC (this is the part you will likely have to replace). The RS-20 uses 2N3055 pass transistors, but you can also use 2N3771 (which is what Astron has been using on newer units). Test the pass transistors, IF you are replacing the LM723 (testing with a VOM is covered in the KBT web site - below) Excellent reference web site for understanding, troubleshooting and repairing linear power supplies http://www.kbt-dc-supplies.com/index.php Dave Metz, WA0AUQ's article What Inside Your Astron? http://www.seits.org/features/pwrsup.htm This is a very easy repair, and it one of the Amateur technical basics (audio, power, antennas) that I teach new amateurs. Astron schematic diagrams http://www.repeater-builder.com/rbtip/astron-index.html Greg w9gb Message: 11 Date: Mon, 13 Dec 2004 09:47:45 -0600 From: James N5TOG Subject: [Elecraft] OT: Astron RS 20 schematic Would some one have a schematic for an Astron RS 20 power supply they could email me or know were i can find it. Sincerely Harold N5TOG K2 1587 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Anyone using a K2 for RX and another TX?
Just for fun I whipped up a little logic circuit which placed appropriately in the K2 and with an added DOW-KEY relay and a foot switch would allow the use of the K2 as a reciever with a free standing transmitter. This is untested and just a mental exercise but it is how I would attempt to resolve the problem. I believe you can do it without breaking a single trace. It ain't QSK but it is just one switch. e-mail me if you want the proposed circuit. WARNING: If you play around with the MCU |MUTE circuitry, it is very ESD sensitive and I am not the only one who has discoverd that. The only solution if you blow it is a new MCU if you want the audio mute. 73, Jim, W4ATK K2 #4028 ___ 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] VO2AAA
Hank, You worked me... N2WN with K2/100 #3311. Thank you for the tough multiplier. Didn't get you on all the bands, but was happy with those that you did provide. Final Scoring info: BandQSOsPts Cty ZN 1.8 16 2785 3.5 66159 36 14 7 110292 62 22 14 212590 86 31 21 166465 76 25 28 76197 41 20 Total 646 1730 309 117 Final Score : 736,980 See you in the ARRL DX CW Test. 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
REL[Elecraft] PLL Reference Oscillator Range Test
Well, it is there on page 8 of Trouble Shooting. The last two bullets on the page. Just where it would be if I were looking for it, dead last place I looked! :-) That circuit is pretty rock solid, no pun intended, but there are some pointers to check out. 73, Jim, W4ATK K2 4028 ___ 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] Festive Season.
Hello Everybody, As I am leaving for Belgium soon and will be offline, may I wish you all a VERY Happy Festive Season, and a VERY Happy New Year when it comes. 73, GeoffGM4ESD. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FS- Updated List
Updated List- K8ZT's Fall Clearance Sale Items that have been sold have been deleted from the list. Prices have been reduced on a number of items Added List of Books ** Please reply directly to me and not to the mailing list. Refer to item #s when inquiring. PLEASE INCLUDE ITEM NAME and number IN E-MAIL SUBJECT. ***(Please read all notes below the list of equipment.) See http://www.k8zt.com/note.html for more info. -- -RADIOS ACCESSORIES- #1- Elecraft K2 Transciever. Excellent condition both electronically and cosmetically. Basic unit plus KSB2 SSB Option and K160RX 160M Option. Firmware upgraded to (2.03d MCU / 1.07 IOC). Serial Number 0652. Microphone plug wired for a Kenwood Mic.(not included). Headers installed for easy addition of options-- KAF2 Audio Filter, KAT2 20W Internal ATU and KNB2 Noise Blanker (not included). Has worked over 7500 QSOs and DXCC WAS many times over. $599 plus shipping Pictures at http://www.k8zt.com/k2pix.html #2- Ten-Tec - Argosy Model 525 (Analog) works fine, cosmetically 8 out of 10 - $275 #4- LDG QRP Automatic Antenna Tuner (non-latching relays) $80 #6- Yaesu- FT-470 Dual Band HT - $150 #7- Yaesu- FT-33 220 HT - $170 #15- MFJ Voice Keyer- $90 #17- Alinco- Model 110 FM 2 Meter Mobile - $110 -BOOKS- #40- ARRL Operating Manual 4th Ed. - $8 #41- ARRL Operating Manual 3rd Ed. - $8 #42- ARRL Antenna Handbook 14th Ed.- $5 #43 Radio Amateur Callbook- 1988 North America - $8 (or both for $14) #44 Radio Amateur Callbook- 1988 International - $8 (or both for $14) -TOWER ANTENNAS- #19- Tower- Heights Aluminum Freestanding 38' on ground good condition. Pick up only, or will deliver in Akron, OH area for a small fee -- $175 #20- HF Beam- Butternut HB-5B Butterfly Beam-Light weight, covers 20,17,15 10 Meters. I also used mine to work on 6 Meters. See URL for more information http://www.texastowers.com/hf5b.htm. Used, partially assembled and on ground. Pick up preferred in Akron, OH area or I can pack for small additional fee -- $145 #21- Vertical- Butternut HV-6-V - covers 80, 40, 30, 20,15 10 Meters - Used, in good condition, partially dissasembed -- Pick up only Akron, OH-- $145 -COMPUTERS- #22- Computer-- Apple Macintosh Power PC 6500 250MHz Tower includes mouse and keyboard and OS $90 also have matching 15 monitor with built in speakers- $50 or $125 for all plus shipping. #23- Computer Apple iMac- grape (purple) has intermittent power up problem. Very good cosmetic condition. Sometimes starts up other times will not power up. $115 #24- Laptop Computer- Compaq LTE Elete with built in power supply. Color LCD display, built in mouse. Good Working condition, 486 is excellent for running TR, NA or CT contesting software. Does not include hard drive or battery. Unit will boot from built in floppy drive. (Require simple inexpensive 110V AC appliance power cord such as Radio Shack model 61-2878.) $15 #25- Large box (over 12x24x24) of partial units and parts for Compaq LT Series Notebooks $20 *** NOTES - - 1. Unless noted otherwise, all items are currently in good working condition. 2. If the buyer is dissatisfied with an item, it maybe returned for refund (minus shipping and/or PayPal charges) by first notifying me and then receiving written confirmation of return arrangements. No additional warranties or other guarantees are provided. 3. No returns will be accepted if buyer has modified, used improper voltage/polarity power supply, improperly operated or attachmented improper accessories, electrically or physically damaged the equipment and/or failed to contact seller before returning item. 4. Payment only with U.S. Post Office Money Order or Pay-Pal(Personal accounts can send and receive any type of payment that is not funded by a credit card... https://www.paypal.com/cgi-bin/webscr?cmd=_help-extleafid=3951answer_id=5192504 My account is a Personal account.) 5. Shipping cost paid by buyer unless otherwise agreed upon by seller and buyer. I will ship overseas but additional packaging costs may be incurred. 6. Photos for many items are at http://www.k8zt.com/pics.html. I can also e-mail photos of specific pieces of equipment. 7. Prices on many items are negotiable 8. Discounting for multiple item Package Deals will considered. 9. Trades (or partial trades) will be considered on some items (no boat anchors, tube equipment, scanners, computers or test equipment accepted) 10. Please e-mail me for more information -- |--| Anthony A. Luscre K8ZT Stow, Ohio |--| Visit My Website at http://www.k8zt.com |--| ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info
[Elecraft] K6DGW/MM - advice and guidance
We're booked on a cruise thru the Canal next spring on Princess. Our room has a balcony which I understand is more like a shelf. I purchased and built a KX1 to take with. Being a real conservative I guess, I began getting ready for international operation as outlined on the ARRL Web Site (I tend to follow the rules). I decided I'd get an Americas Permit to operate from HP, and confine all other operation to international waters. To do this (and be legal), I needed permission from the Captain and a permit from the country of the ship's registry. So, I wrote to Princess and described my plan, the specifications of the radio, and the permission and info I needed. They called back fairly quickly and said they do not allow radio transmitting aboard ship as it coule interfere with the ship's operation. I'm currently considering various avenues of appeal, including taking the KX1 and asking the real Captain when we're aboard since I'm almost certain the answer I got is a corporate policy and the Captain was never asked. I'd be interested in hearing (off-reflector is probably best, this is a very busy place) experiences (particularly with Princess -- the ship is the Sun Princess) in making this work. Disappointing as it is, all is not lost. I've acquired a new interest in QRP, am gearing up for a run at the top 5 in the Skinny Class in the Spartan Sprint (I'll have to learn to send CW with the buttons so I can jettison the paddle), and between the KX1 and K2, I've begun to operate from our deck when the temp is high enough and the sun is out. If I think I can get away with it with the MP-1 sticking up over my head and a wire trailing behind me in front of my neighbors, I may try some K6DGW/PP. We do live rurally, and I might manage it down by the tracks. 73 and Happy Holidays, Fred K6DGW Auburn CA CM98lw ___ 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 #4595 Lives
Just finished the initial power on testing on K2 #4595. There was no smoke and all functions tested appear to be working per the manual. I do have to say that this milestone was a rush to say the least. Now on to building the logic probe. 73, Ed N0EHQ ___ 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
