Vince Mulhollon
  • Member for 6 years, 11 months
  • Last seen more than 3 years ago
  • Wisconsin USA
Stacked shell inductor — what's its function/use?
4 votes

This is likely a ferroresonant transformer. http://www.electroncoil.com/ferroresonant_transformers.php http://www.hammondmfg.com/CVR.htm http://www.oltronix.nl/en/ferroresonant-principle If you ...

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Signal Range Test With One Person
2 votes

tomnexus answer is excellent, as a practical matter when fooling around with microwave gear I would point a camcorder at a wall clock in a spot where it can hear the RX quite well and then hit record ...

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Will I harm batteries by only trickle charging them, or connecting them to a power supply?
Accepted answer
2 votes

You're not getting answers for multiple reasons. 1) Batteries are a science but its surrounded by marketing and astrological tradition (concrete floors, blah blah) 2) If something bad happens they ...

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How can I disable the TOT time out timer of the TM-V71A?
1 votes

You have two questions. First answer is no, page 70 of the manual, the menu option is TOT and default as you've noticed is 10 and the options are 3, 5, or 10 minutes. Second answer is you could rig ...

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Why exactly would cable lengths to a duplexer matter?
1 votes

Ham radio is pretty much the intersection of EE and murphys law. In more detail: There is no electrical reason but there is an excellent practical reason with feedlines such that if you need a 49 ...

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What's the difference between "minimum SWR" and "resonance"?
1 votes

Most folks will describe resonant as zero reactance, a pure resistive load. All antennas are resonant at multiple frequencies. You can load up a quarter wave vertical as a 3/4 wave, a 5/4 wave, and ...

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How does an antenna transform impedances along its length?
1 votes

Question 1) you can characterize it by going all smith chart on it, plot your first example as starting at 50R feedline and move thru your trap and then the antenna to end up, yes, at the vector ...

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Why does the FCC publish station address information?
0 votes

Compare FCC §97.103 to §97.105. The FCC really likes to separate the concept of station license from operator license. See how all the other services work, like marine or radar, etc. If you “have ...

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