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Type: Posts; User: brandon lind

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  1. I only have my general license in radio, but I do...

    I only have my general license in radio, but I do have an extra license for drinking. I keep it wrapped around a finger on my left hand!
    Just kidding, she's amazing.

    Congats on the new license!
  2. Thread: Bitcoin

    by brandon lind
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    Bitcoin

    Unrelated but important.

    I heard rumor that china is banning bitcoin mining for environmental reasons (they do 65% of mining). The price is dropping FAST. Same with etherium. Maybe I allowed my...
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    I have already swapped out many of the outlets...

    I have already swapped out many of the outlets (they were the spring type and none of the outlets were secure so those wires moved every time something was plugged in). There is one short run of 14ga...
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    I had a loose neutral wire in an outlet across...

    I had a loose neutral wire in an outlet across the room. The guy that built this cabin thought daisy chaining 2 rooms (lights and all outlets) with 14ga wire using those push the wire in the hole...
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    no current on the ground wires at the box. Used a...

    no current on the ground wires at the box. Used a Klein Tools CL390 clamp on to check.
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    End-Fed? People like to drive long wires from the...

    End-Fed? People like to drive long wires from the end with a 49:1 or similar balun (to match the high impedance found at the end).
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    No blown bulbs or brownouts. Good suggestions...

    No blown bulbs or brownouts. Good suggestions though. Thanks! I am going to take the clamp-on to the ground wires coming into the panel. I took the cover off yesterday but haven't had a chance to...
  8. If you have access to a spectrum analyzer, you...

    If you have access to a spectrum analyzer, you can see what areas on the spectrum are hot in the bad area and not so bad in the location you found to work better. Outside signals will, for the most...
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    I would have to tear the wall apart to do that. I...

    I would have to tear the wall apart to do that. I have not built any transformers.
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    Metal desk capacitance

    I have a mystery. Between ground and my metal desk (I thought I had grounded) there exists 5.44V of 60Hz AC. I have unplugged everything on the desk and from mains ground to my desk there is still...
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    NanoVNA-F vs SVA1032x @ 207MHz

    I wanted to compare the nanoVNA-F to the Siglent SVA1032x so I calibrated them both with the same kit and took screenshots of the 75ohm yagi I made for ch12 OTA TV (207MHz) through about 50' of 75ohm...
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    just saw a video and thought of this thread. They...

    just saw a video and thought of this thread. They use a rotary hammer (DeWalt DCH773) to drive in a 10' ground rod. Took about 30 seconds.

    https://www.youtube.com/watch?v=q1mkWYqsXv8
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    Like this?...

    Like this?...
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    FYI: NanoVNA and Port Extensions

    If you are like me and have had a nanoVNA in the desk drawer and haven't thought to upgrade the firmware since you got it, there's good news. The latest version I found for my nanoVNA-F does port...
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    Close call

    I've had a Siglent SVA1032x sitting in my cart for 3 days while contemplating my options and today my cart was empty. The site said to contact the company for availability, so i did. The lady I spoke...
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    What i am about to suggest, i have not tried. I...

    What i am about to suggest, i have not tried. I recommend testing it on a junk antenna first (ive tore all mine apart or i would).

    What if, a quarter inch from the rolled edge of each section at...
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    welcome aboard!

    welcome aboard!
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    Mylar doesn't stretch, id have to send it up...

    Mylar doesn't stretch, id have to send it up partially empty. I think I'll stick with a normal balloon.

    Air has a density of 0.001225g/cm^3
    a 2:1 mixture of hydrogen and oxygen obtained from...
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    I don't plan to let it go much higher than a mile...

    I don't plan to let it go much higher than a mile or two and would account for expansion. As for gas retention, I do not intend to have it deployed for any more than a few hours at a time, so whether...
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    Lifespan of a weather balloon

    I am interested in building a cross-band repeater deployed on a tethered weather balloon for emergency situations where local repeaters may be overwhelmed or non-functioning due to power loss. I plan...
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    Ok, I built it. Forgive my mess of a desk. I...

    Ok, I built it.

    Forgive my mess of a desk. I didn't put the parts on a board as I didn't want to waste one of the few I had left on it so I built it into a ball of components with no board (hot...
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    If you are concerned with it falling off, try to...

    If you are concerned with it falling off, try to make it fall off. If you can remove it, braze it back on. If force greater than what will be encountered driving down the road does not remove it, you...
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    Your confusion is likely due to that being a...

    Your confusion is likely due to that being a creation of my imagination. I highly doubt anyone has done that as grounding to the radio is usually sufficient (most rigs now that I think of it have...
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    So I started in on building an active filter just...

    So I started in on building an active filter just to see how easy it was to do this. Admittedly, I started with K4ICY's schematic http://www.k4icy.com/cwfilter.htm with the intention of replacing the...
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    To be completely honest with everyone here, I've...

    To be completely honest with everyone here, I've NEVER grounded any of my radios :) I also run a 100w rig.

    RF is a complicated beast. There are many reasons for grounding ranging from static...
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