Nashua Area Radio Society

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  • in reply to: 20m Slow CW Net #5683

    Sorry, I forgot to mention that the chart above ONLY applies to Novice and Technician Licenses. I’ll relist the allocations again in case someone wants to print a copy for quick reference.

    Novice & Tech CW ONLY HF Privileges

    •80M = 3.525-3.600 MHz: CW Only, 200W max
    •40M = 7.025-7.125 MHz : CW Only, 200W max
    •20M = NONE
    •15M = 21.025-21.200 MHz: CW Only, 200W max
    •10M = 28.000-28.300 MHz: CW Only, 200W max
    •10M = 28.300-28.500 MHz: CW, Phone, 200W max

    also see: http://www.arrl.org/graphical-frequency-allocations

    in reply to: 20m Slow CW Net #5682

    •80M = 3.525-3.600 MHz: CW Only, 200W max
    •40M = 7.025-7.125 MHz : CW Only, 200W max
    •20M = NONE
    •15M = 21.025-21.200 MHz: CW Only, 200W max
    •10M = 28.000-28.300 MHz: CW Only, 200W max
    •10M = 28.300-28.500 MHz: CW, Phone, 200W max

    in reply to: 20m Slow CW Net #5667

    Band should be basically dead … 14052 kHz sounds good

    in reply to: To our Recent Morse Code Class #5662

    [attachment file=5663]

    [attachment file=5664]

    [attachment file=5665]

    Attachments:
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    in reply to: To our Recent Morse Code Class #5657

    Seeing the message expressed in Dots and Dashes is difficult.

    BUT if you replace each dot with a DIT sound and each dash with a DAH sound, you’ll hear the rhythm of the DITS and DAHS in your mind and should almost instantly KNOW the letter.

    Students need to focus on the rhythms, and TRY to avoid thinking or visualizing code in terms of DOTS and DASHES. DOTS and DASHES can’t be heard on your radio, only DITS and DAHS can. Layne’s message will be much easier if you attempt to “hear” the sound and not the visual image.

    Any suggestions or feedback is welcome as students are in the best position to recognize class shortcomings, which can benefit future classes.

    That said, Congratulations to all who took the class and much success on the air. Feel free to join in the SLOW CW net.

    Oh, one last thing: “Practice, Practice, Practice”

    73

    in reply to: To our Recent Morse Code Class #5658

    Layne,

    I showed my wife your attachment and she though it was “Cool”

    Mike

    in reply to: K1MUR Murray Hensch, SK, 9/24/16 #5637

    I did not want to post this until it was added to the online obit, but Murray is survived by his wife and teenage daughter and son.

    in reply to: Whats up with my 7300 #5545

    This is hard to answer without seeing the actual setup, but there are a few things you can try.

    High Noise Level:

    1) Listen on the offending band, and observe the background noise level with your S-meter.

    2) Temporarily disconnect your antenna – your noise level should drop way down close to an S-meter S1 level. (try to prove the noise is not being generated by the radio)

    3) Reconnect the antenna, the high noise level should return. (make sure the connection is good and secure).

    4) Turn OFF the built-in Preamp and turn on the built in Attenuator. The noise level should be greatly reduced. Goal – don’t overdrive the front end of the radio with strong signal or background noise level. Don’t be afraid to use the attenuator or to adjust the front end gain controls when needed. If you saturate or overload the DSP A/D converter stage, the radio will struggle with the signal processing function. Using attenuation will moderate the DSP levels and help improve the signal processing.

    5) Tune around the band and look for a few signals to see that all is working ok.

    6) Try using a somewhat narrower Bandpass Filter selection. When you reduce the filter bandwidth by half, the noise floor will also drop by half. Assuming your listening to SSB, you may not have too many workable selections as you will need a bandwidth of about 2.4 kHz to recover all the intelligible audio components. (You can narrow it much more for CW operation but a voice signal will require more bandwidth.

    7) Experiment with the receiver RF Gain knob. When adjusted correctly it can help improve the signal quality by establishing a RX threshold that improves weak signal readability.

    8) You may also have a local noise source that is generating high levels of noise from time to time. This is harder to find and the spectral distribution of such noise sources is usually rather broadband and would be expected to affect more than one band. Consider possible noise sources (plasma TV, LED light bulbs, WALL WARTS). Wall warts or small AC to DC power supplies usually used to run small devices such as recharge batteries or charge your cell phone or cordless screwdriver. These often include a switching stage voltage regulator which can be great noise sources. Try hunting for local noise sources using a small AM transistor radio tuned to a blank frequency on the AM dial.

    Transmitter issues:

    You stated you added a footswitch, headset and microphone. You always want to be suspicious of any recent changes that you have made to your setup. Try using the handheld mic that came with the radio. You now it works so try the original equipment and see if you still have the problem. Does the Power Out meter level bounce when you speak into the microphone? It should.

    1) Verify that you are in SSB mode and have not accidentally selected another mode such as CW or FM mode.

    2) Check the Mic gain settings – verify it is not set too low or too high.

    3)Try monitoring your signal with another receiver with NO ANTENNA ATTACHED – be careful not to overload or damage that receiver. (Note: a few HTs can actually tune and demodulate your HF signals (my Kenwood TH-F6 can receive HF CW and SSB signals).

    Well hopefully, that will give you a couple of things to try. Please share any results you make as that may help others with a similar problem.

    in reply to: Apple iPhone App that mimics G4FON CW Software #5516

    Thanks Bernie, sounds like a great tool for Apple iPhone owners. The those with other devices that can be “online” and surf the web, the youtube presentations sound with the Search phrase “Learn to Read Morse” will yield several sample speeds:

    For a slightly different approach, search for “Moby Dick Morse” and find segments of the book displayed on the screen at various playback speeds. The process here works somewhat different. You see what will be sent and follow along in your head (knowing what the next letter, number or punctuation symbol will be. Here is Moby Dick at 10WPM…

    Almost any device with a web browser should allow those without an iPhone to have easy access to help and improve their skills. Also any device that can play the MP3 files from the K7QO CD can store and play them off-line. I suggest keeping the list of MP3 files small and perhaps starting with 040.mp3 (two letter words) or leter files in the series.

    Also, the ARRL practice sessions can be downloaded or played online as well, so there are lots of practice options.

    http://www.arrl.org/code-practice-files

    Also, while trying to search the ARRL site for a link to the W1AW files, I stumbled upon this interesting sounding link:

    http://www.arrl.org/forum/topics/view/1054%60

    It’s an App called CODEMAN and it’s available for Apple iPads, iPhones and Android devices. Note, a quick search on the ARRL page will provide lots more, including a link to someone who translates news broadcasts into CW streaming. Ideas that can help with almost any smart device.

    Thanks again for sharing as it forced me to add some additional ideas for us non iPhone folks.

    in reply to: Electronics Tutorials #5442

    NOTE: You may need to CUT and PASTE some of the links into your Browser to be able to view them. All of the links are valid, but the club webpage attempts to open the links thru a slideshow window that doesn’t always seem to work successfully with all of the videos.

Viewing 10 posts - 371 through 380 (of 446 total)

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