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Type: Posts; User: brandon lind

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  1. Replies
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    Mobile Radios I would be more concerned with asking your radio...

    I would be more concerned with asking your radio to transmit through a filter unit it wasn't designed for. I have a big box of old 38-42MHz commercial Motorola radios. They are not being used on 6m...
  2. Thread: NanoVNA

    by brandon lind
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    1,623

    Its not quite that simple. If I wanted to use my...

    Its not quite that simple. If I wanted to use my nanoVNA on 75ohm coax and calibrate to the end of that coax, I cannot simply attach a 75 ohm load + open + short, hit cal and be done. If I did that,...
  3. Thread: NanoVNA

    by brandon lind
    Replies
    7
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    1,623

    I wish it had the option to calibrate to 75ohm....

    I wish it had the option to calibrate to 75ohm. Also, there is a delay feature that doesnt work on mine. Overall, for the price, i am very happy with mine and use it often.
  4. Your easiest solution is to put up a 10MHz...

    Your easiest solution is to put up a 10MHz antenna and use the WWV time signal.

    If you insist on building one, will it be for FM or AM?

    Edit: Take a look at the Bipolar Transistor Cookbook (By...
  5. I think its -125 MHz (make sure you make it...

    I think its -125 MHz (make sure you make it negative).

    Also, and irrelevant, i noticed on mine that with the ham it up set to passthrough, the converter still needs usb power to pass RF through.
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    Whats up with the second bracket? All the other...

    Whats up with the second bracket? All the other pictures online show the antenna without the added support. That appears to be a metal bracket insulated with electrical tape and zip tied to the...
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    Base Radios 10w is the minimum power at the lowest setting, a...

    10w is the minimum power at the lowest setting, a level which is controlled by a seperate resistor on the board rather than the extreme of the potentiometer. If the RF power potentiometer makes...
  8. Thread: New ham

    by brandon lind
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    3
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    845

    Mobile Radios Does this mean you would like to use a crossband...

    Does this mean you would like to use a crossband repeater from your vehicle such that your (presumably UHF) handhelds are re-transmitted at the vehicle (on VHF) to others on the trail? This would...
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    You would not need a diode to see an RF signal...

    You would not need a diode to see an RF signal coming in on an antenna using an oscilloscope, oscilloscopes see AC just fine, no need to rectify it.

    Yes, the signals may be too small to see, and...
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    Cellular passive "repeater"

    Apologies for the lengthy story, this one is for people professionally acquainted with cellular sites...

    I recently went camping with the family, and of course, a few people really needed their...
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    I would ask if their current radios are licensed...

    I would ask if their current radios are licensed as abandoning an active license would seem unwise. What frequency do they currently run on VHF, a MURS color dot one or something licensed?

    Id also...
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    I would take the hard drive out of the 3.1 system...

    I would take the hard drive out of the 3.1 system and temporarily connect it to the XP system via IDE cable just like the XP systems HDD and use XP OS to copy the files to the other HDD then...
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    That does look awesome. Ive used automotive...

    That does look awesome. Ive used automotive ignition coils and microwave transformers before. I used to drive 12v ignition coils using 120v mains with a triac dimmer switch in series. On low, the...
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    Many thanks! I remember a scratch in the black...

    Many thanks! I remember a scratch in the black finish on the top of one if the insulators looked brown so maybe the top was bakelite. Hopefully you happen to cross paths with one, I've spent years...
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    1127 I forgot to add the screw heads on the...

    1127

    I forgot to add the screw heads on the electrical cord plate and there are two metal ears on the top surface for bolting it into the side of the furnace, but this looks very close to what it...
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    Close, but not quite. Ill fire up solidworks and...

    Close, but not quite. Ill fire up solidworks and create a 3D part from memory and get it posted. Shouldnt take long.
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    Mobile Radios You got me there, but the internet says after the...

    You got me there, but the internet says after the tone transmits, the mic audio is absent for a full few seconds thereafter. I never got into digital modes, just quoting a search result that caused...
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    Mobile Radios Its not in wires x mode, is it? If so, pull off...

    Its not in wires x mode, is it? If so, pull off the bottom left knob and add an o ring or washers to the shaft so you dont accidentally toggle it to "internet on" by bumping it.
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    No. Im thinking the one i had was from the 60's....

    No. Im thinking the one i had was from the 60's. It might have been a Westinghouse because when i see the color and the labels on their motors, something about it stands out. It was a cylindrical...
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    High voltage oil burner transformer

    Completely non-radio related, but I thought I would probe the minds of the elders here.

    My electronics history starts at 5 years old with my first soldering iron burn on my foot. Many destroyed...
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    I agree with and appreciate your decision, M0BOV....

    I agree with and appreciate your decision, M0BOV. Thank you!

    This post can be laid to rest as my friend is arriving tomorrow and I've already decided to proceed as planned as I have not yet hit...
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    This wasn't a question of performance, it was one...

    This wasn't a question of performance, it was one of maximum legal height off the ground.

    As for the performance aspects you mentioned... allow me to set your mind at ease. The vehicle is a 2004...
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    mobile antenna height

    I am about to help a friend install a mobile whip antenna on 10m. When I made the one for my truck, for some reason I came to the conclusion the maximum height from ground to the tip was 14ft 6inch....
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    Icom IC-718 would be a very nice one to start...

    Icom IC-718 would be a very nice one to start with. Well priced and sounds great on the air.
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    The next step is a general or extra class...

    The next step is a general or extra class license. Get some study material and prepare for the next text. While you are doing that, get a decent HF radio and some means of checking antennas like an...
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