The Richardson Wireless Klub > RWK News > Technical
Technical
Chip Coker KD4C
October 31, 2022
By Chris White WX7V I love my Elecraft KX3 but as I learned on a mini-DXpedition to St. Martin this summer, sometimes 10 or even 15 watts is not enough power to make a decent QSO rate, even with a…
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Chip Coker KD4C
September 26, 2022
By Don Weeks N5SKT Recently the guys at Coffee and Ham Radios (CaHR) put together a little challenge to come up with a ham shack for less than $1000 and create a video around it. I had an idea to…
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Chip Coker KD4C
August 25, 2022
By John Slaughter WB5HSI An opto-isolator is a light emitting diode and a phototransistor in the same package. The LED is completely isolated electrically from the phototransistor. Most devices have 1000 volts or more of isolation. The capacitive coupling between…
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Chip Coker KD4C
August 25, 2022
By Chip Coker KD4C Those who know me and my ham radio experience know that I love 10 Meters. Early in my ham career (and in the peak days of solar cycle 21), I would come home from school and…
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Chip Coker KD4C
July 31, 2022
By Mike Jahrig KG5P (Part 4 of a series) Last month we discussed four types of filters and investigated their behavior using the NanoVNA. This month we will use the Nano to identify the values of some junk box inductors…
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Chip Coker KD4C
May 27, 2022
By Mike Jahrig KG5P (Part 3 of a series) Last time we discussed investigating the properties of low pass and high pass filters using the Nanovna. Today we will discuss 2 additional common filter types, the bandpass, and bandstop (sometimes…
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Chip Coker KD4C
May 21, 2022
Or “Why Do I Hear Strange Things On The Repeater Frequency?” By Chip Coker KD4C Have you ever listened to the repeater frequency and swear you heard stations you didn’t recognize and a strange repeater ID? Well chances are your…
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Chip Coker KD4C
May 1, 2022
By Mike Jahrig KG5P (Part 2 of a series) This month I will continue my discussion of the NanoVNA. One useful accessory I have found is a RF Demo Kit that I bought off the internet from Banggood or somewhere…
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Chip Coker KD4C
March 30, 2022
By Mike Jahrig KG5P A lot of RWK hams have purchased NanoVNAs. I recently obtained myself, and have learned that it provides a wealth of information in the shack. If you are not familiar with this device I suggest you…
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Chip Coker KD4C
February 27, 2022
By Rob Forson K5WFR My family and I suffered through several days with no power during the winter storm of February 2021. Long before the inside temperature dropped into the lower 40’s, I swore that we would not be left…
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