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Type: Posts; User: brandon lind

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    Ferrites are the one thing in the electronics...

    Ferrites are the one thing in the electronics world thats not standardized. Each manufacturer has its own proprietary mixes. There are multiple manufacturers selling the same "type" ferrite, but they...
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    you're probably right...

    you're probably right...
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    New propagation mode!!!

    Who's excited about the thousands of little microwave reflectors Elon Musk is supplying us with? Lets just hope it don't get named Debris Scattering! lol
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    Base Radios No, CB will rarely ever work that distance. In...

    No, CB will rarely ever work that distance. In fact, 11m CB is the least likely to work for 250 miles. That is well outside the ground wave coverage and anything ionospheric will not work as CB cant...
  5. CW Fldigi is fairly easy to use, it has many digital...

    Fldigi is fairly easy to use, it has many digital modes and it sends and receives CW well. The program has options for rig control (that ive never used), but what i like most is that it can interface...
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    No idea. I noticed that yesterday. It can still...

    No idea. I noticed that yesterday. It can still be seen as if it were its own post without replies further down the activity stream.
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    The satellite receiver is filling the house mains...

    The satellite receiver is filling the house mains with random niose between 700kHz and 1.3 MHz, the pc power supply has a 24kHz signal, and with everything off, i see the power companies 4kHz meter...
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    This should be in the junk box!

    Dull saw, PVC, hot glue, extra junk = common-mode clamp for finding RFI sources. Seems fairly flat across 50khz to 10MHz (somehow) and added an old 5v plug so i can stick in a 1uF capacitor and see...
  9. Welcome to the hobby! RF propagation is a huge...

    Welcome to the hobby!

    RF propagation is a huge topic and there is no magic power level to ensure communication at any frequency or location. The pdf I attached is a propagation summary from the...
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    Anything in the same plane as the elements can...

    Anything in the same plane as the elements can cause issues if its physical dimensions allow for resonance.. I would recommend the shortest bolts possible, and if the bolt length necessary is...
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    What kind of HF antennas do you have set up?...

    What kind of HF antennas do you have set up? anything aimed at Minnesota?
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    I have a neighbor who lives in Madison during the...

    I have a neighbor who lives in Madison during the winter. That's not far from you. He has a cabin just down the road from me.
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    Congratulations on passing the tests! If you get...

    Congratulations on passing the tests! If you get a callsign the day after taking the tests, i will have to assume elon musk bought the fcc because they dont get things done that fast. I now have a...
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    https://www.powerstream.com/NiCd.htm ...

    https://www.powerstream.com/NiCd.htm

    https://batteryuniversity.com/learn/article/charging_nickel_based_batteries
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    In a previous thread, i had asked a question...

    In a previous thread, i had asked a question about ugly baluns and I was given an interesting link on the subject written by G3TXQ. I still need to do my ugly balun tests with the VNA, just too much...
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    KE0KOY Brandon

    KE0KOY Brandon
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    Fun little program

    I made a text encryption program in visual studio. Though it was worth sharing. I know, its illegal to obscure meaning on ham radio transmissions... still a fun little program.
    ...
  18. Im just beginning down my electronics journey but...

    Im just beginning down my electronics journey but id guess that a ferrite bead on the gate pin of the triac (likely a BT136 or similar device) would solve the issue.

    EDIT: This site makes other...
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    Base Radios Sounds like a mars cap mod was done to the radio...

    Sounds like a mars cap mod was done to the radio at some time. I would take ICOM's advice and just watch your TX frequency if the radio works as is.
  20. You could try a shorter whip on the center of...

    You could try a shorter whip on the center of your vehicle roof. If you use a 5/8 whip, switch to a 1/4 wave whip. Even if you clipped a 1/4 wave a little shorter and used a loading coil to tune it....
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    My question is now moot. Turns out plotting...

    My question is now moot.

    Turns out plotting the transformative effects of any impedance coax on a smith chart by hand is easier and faster than I originally realized. My fault for ending my smith...
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    Thank you for the response. Unfortunately, that...

    Thank you for the response. Unfortunately, that suggestion does not work. I asked this question elsewhere and had responses from people who have used VNAs their entire life completely miss the...
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    Base Radios After researching electrostatic precipitator...

    After researching electrostatic precipitator power supplies, My first course of action would be to call the power plant down the road and ask them at what times the device is in operation. Sounds...
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    Base Radios When RFI corresponds to certain times, it is...

    When RFI corresponds to certain times, it is always related to human activity rather than a hardware fault like power line micro arcing. Start by turning off all power on your property to eliminate...
  25. PLEASE>>>>> NEVER USE SQUARE WAVES IN RF DESIGN...

    PLEASE>>>>> NEVER USE SQUARE WAVES IN RF DESIGN (unless you are using them in mixers with tuned circuit filtering afterwards).. Square waves can be thought of as the combination of many many sine...
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