[Elecraft] Elecraft CW Net Report
Good Evening, Gusting winds have slowed enough to allow the snow to fall. Weather reports of 80 degrees with sunshine were appreciated. Spring takes a while to get here. Twenty meters seemed noisy and weak. Forty meters had less noise and less QSB. Hopefully solar activity will increase soon; luckily it has nowhere to go but up. On 14050.5 kHz at 2200z: W0CZ - Ken - ND NO8V - John - MI K6XK - Roy - IA On 7047.5 kHz at z: W0CZ - Ken - ND K7TXA - Jim - CA (for the moment) WM5F - Dwight - ID K0DTJ - Brian - CA K6PJV - Dale - CA K6DGW - Skip - NV Until next week stay well and 73, Kevin. KD5ONS - You know, Mr. Tully, you are a most fortunate individual. I know! You have been a participant in the biggest interdimensional cross rip since the Tunguska blast of 1909! Felt great. We'd like to get a sample of your brain tissue. Okay. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] WTB KX3 with add-ons
Hi I am new to the Ham world (passed technician test today) and am interested in buying a used KX3 in good condition with some add-ons... If you are interested in selling yours, please contact me at ewrjunkm...@gmail.com Thanks Eric __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] SSB Net for 3-28-2021
Here are the stations checking in to the SSB 20M net today. Despite the contest going on, we were able to have a short net. Please join us for the 20 m net at 1800Z 14.303.5 the 40M net at 1900Z 7.280 Zoom meeting at 200Z contact Carl K8NU for the link, and 80M net 0100Z today on 3775. The frequency varies due to use.Eric WB9JNZ Call Name State Radio Serial # QRP Notes WB9JNZ Eric IL K3 4017 Net Control NC0JW Jim CO KX3 1356 RelayStation W1NGA Al CO KX2 2002 KB9AVO Paul IN K4 76 K8NU Carl OH YaesuFT 101DX W4DML Doug TN K3 6433 WM6P Steve GA K3S 11453 Relay Station AE6JV Bill NH K3 6299 N4NRW Roger SC K3 1318 Relay Station K7BRR Bill AZ YaesuFT DX 101 KB3FBR Joe PA K2 6178 K6VWE Stan MI K3 650 AI4VZ George GA K3 2412 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3F-100 with options
Hello to the group. I’m thinking of selling my K3 K3-10F with the following options KAT3A KBPF3A KXV3 KPA3A 500 HZ CW filter I’m a Canadian Ham, so shipping from Montreal, Canada. John V2EQL __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] How and How Often to Clean KPA-1500 Cooling Systems?
Re:- > Subject: Re: [Elecraft] How and How Often to Clean KPA-1500 Cooling > Systems? > Message-ID: > > > > Content-Type: text/plain; charset="Windows-1252" > > As you know, I run my amp in a single amp, SO2R configuration. During a > heavy 2BSIQ session on RTTY, temps reach 90 deg C. Fans go to 5 > occasionally. Not a problem. Don?t worry. 90'C is too hot for the heatsink. One wonders what the actual device junction temperatures (the critical value) might be for that, but that can't be measured directly. You need knowledge of the actual power being dissipated, and the various thermal resistances between junction and heat sink, where you can measure temperature. Plus the difference between what the heatsink sensor records, vs the temperature at the device, varies as well. Solid-state power devices (DC and RF) do not like heat, the hotter they are, the less likely they are to last a long and trouble free life. Plus, all the thermal cycling (heat/cool) can stress soldered joints to them that will eventually fracture and cause a fault. Yes, keeping a stable (even hot) temperature will reduce thermal cycling stress, but the overall MTBF of the devices will still be very much shorter at elevated temperatures than if they were kept cooler. Plus, RF device production life-cycles are notoriously short as the development pace is fast, especially with LDMOS devices. Also, often the new "better" devices, are different enough to /not/ be drop in replacements. Electrically or physically. As for cleaning. As often as needed, every site/shack is different. If you see dust accumulating on the outside, it's inside too! Many commercial amps have air inlet filters. But they need to be kept clean, as a clogged filter is just as bad for cooling, as an inadequate heatsink/fan combination and no filters. Regards. Dave G8KBV -- Created on and sent from a Unix like PC running and using free and open source software: __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 Attenuator
Anyone know how many dB comes it with the attenuator switch? How much does it improve the intercept? Bruce W8RA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
