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  1. Replies
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    1,138

    the type of disconnect you need is one that...

    the type of disconnect you need is one that disconnects both the center core and the shield conductor as well but there is another problem,
    common ground conduction through the chassis and ground...
  2. as long as the chimney is not being used to...

    as long as the chimney is not being used to exhaust heat from a hot water tank or furnace/heater it will be fine.
    plus its a great route for multiple cables, But provide adequate strain relief on...
  3. Thread: Wind mill

    by gnuuser
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    882

    unless you plan on re-using the windmill for its...

    unless you plan on re-using the windmill for its intended purpose leaving the blades active is a hazard for wildlife around it both mechanically and sound-wise.
    its ok for it to be repurposed it for...
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    I constructed my own by converting a 600 watt pc...

    I constructed my own by converting a 600 watt pc power supply ( there are many site that you can view on instructions to do this)
    with the silent cooling fans its reasonably quiet and provides a...
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    597

    congrats on getting your ticket! Im looking for...

    congrats on getting your ticket!
    Im looking for exam sites in my area and hope to get my license soon.
    I couldn't go just before the covid hit because i had just got out of the hospital from a...
  6. Thread: Computer OS

    by gnuuser
    Replies
    4
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    1,165

    I use Peppermint 10 and have made extensive use...

    I use Peppermint 10 and have made extensive use of the armature radio section in synaptic package manager.
    almost any linux can download ham apps.
    But there are a few versions of Ham linux that are...
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    649

    ARRL in history.

    I knew the ARRL went back some years But today I found reference to it in a 1959 practical dictionary of electricity and electronics by R.L. Oldfield on page 3 (3rd entry from the bottom right of the...
  8. are the crimp connectors soldered to the wire or...

    are the crimp connectors soldered to the wire or just crimped on?
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    oops I meant to say a 70 cm full wave is not...

    oops
    I meant to say a 70 cm full wave is not that big.
    many of the hf antennas sizes make it impractical and prohibitively expensive to make them full wave size or even half wave size unless you...
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    a good tool to invest is is a good LRC meter on...

    a good tool to invest is is a good LRC meter on off chances when you wind a torroid or any induct-or for that manner using the correct size magnetic wire you can measure it and record the reading,...
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    other than experimentation building a 1/4 wave...

    other than experimentation building a 1/4 wave for 70 cm will work but the length of a half wave would perform a heck of a lot better.
    granted some home owners associations may be a royal pain in...
  12. Thread: pixie 2

    by gnuuser
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    pixie 2

    I purchased a pixie 2 and built it but had no way of testing it. so I purchased another and built it as well.
    setting the devices about 8 feet apart, i connected an amplified speaker to each with...
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    the nano vna meter is a great little tool but...

    the nano vna meter is a great little tool but there is a bit of a learning curve with it.
    I highly suggest downloading the users manual for it.
    the biggest benefit that i see with it is it covers...
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    correction on dipole length not exactly 1/2 wave...

    correction on dipole length not exactly 1/2 wave but more like 47 or 48% of a wavelength.will resonate better than a true 1/2 wave.
    I found this out quite by accident while making a 40 meter wire...
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    heres an interesting experiment to try! dig a...

    heres an interesting experiment to try!
    dig a hole down to the solid clay and drive a 1 foot rod into it, then tie a piece of heavy fishing line to the rod.
    place a plastic sheet over a plastic...
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    13.500 mhz crystals

    13.500 mhz is on the ism bands generally used for things like garage door openers. and not used for general communications.
    But I have about 100 of them and what to do with them? (got them in a box...
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    the fact that your devices have been hacked quite...

    the fact that your devices have been hacked quite frankly shows a bit of poor security measures. IE using familiar passwords and familiar formats.
    password security is only as good as your password...
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    if your local police do not take it seriously the...

    if your local police do not take it seriously the your only recourse is to bring in an outside agency. The FCC takes it very seriously when harmful interference is causing problems.

    on that note...
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    pixie qrp! note these kits are very low cost and...

    pixie qrp! note these kits are very low cost and easy to build
    BUT for technician level to use it for broadcasting you must change the crystal to a 7.030 mhz crystal.
    (7.023 is in the extra band...
  20. Thread: earth testing

    by gnuuser
    Replies
    2
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    548

    earth testing

    on the topic of grounding your tower or shed.
    As an electrician I used to regularly do earth resistance testing in preparation for driving ground electrodes.
    while the average operator does not...
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    no due to the air spaces between the grains of...

    no due to the air spaces between the grains of sand any sandy soil would simply muffle sound unless it has been severely compressed.
    even though quartz is a good sound conductor but only if it is...
  22. Thread: Unknown RFI

    by gnuuser
    Replies
    3
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    1,922

    Base Radios When we moved into our new house a few years ago...

    When we moved into our new house a few years ago we had an rfi problem that usually happened when the weather was damp, I analyzed the circuitry in the house and found when the last people who lived...
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    antennas yes its a tricky and sticky subject to...

    antennas yes its a tricky and sticky subject to discuss because there is so much information on them. Designing them can be fun as it is as much theory as trial and error.
    But the more info you have...
  24. water in the coax cable is a possibility. with a...

    water in the coax cable is a possibility.
    with a base station the coax and connectors are exposed to inclement weather all the time (including wind) while it may not seem like much wind flexing coax...
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    I wonder if you've gotten any use of it because...

    I wonder if you've gotten any use of it because of the covid19 pandemic?
    I imagine phone networks were a bit overwhelmed!
    more along the lines of disaster scenarios( earthquake, tornado, etc.)
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