Category Archives: Ask Dave

BITX-40 TX Audio Response Tests (#58)

Using the function (signal) generator put together in episode #57, we test the transmit audio response of the BITX-40 to discover that rolloff occurs around 2 kHz. Watch to see how it all works! You can see a list of … Continue reading

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Unpacking and Testing the XR2206 Function Generator (#57)

Let’s unpack and then test a remarkably inexpensive kit for a sine/triangle/square-wave 1Hz to 1MHz kit. Dirt cheap and works. This video covers only unboxing and then testing. For construction, see Randy K7AGE’s video at https://youtu.be/EFRVeoh20Bc. You can see a … Continue reading

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DeoxIT demo on an LED flashlight (AD #56)

CAIG Products, which makes DeoxIT, asked me if I’d like to try some. Soon it was at my door (to be clear, “mailed” is used in the generic sense–it did NOT come via USPS). The demo makes an old LED … Continue reading

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Experimental video: FARN plus channel updates (AD #55)

Okay, so this is an experiment. It’s April 1st, hence time for a Fake Amateur Radio News video. Also, I wanted to pass on some info about my channel, so I added “infomercials.” It seemed more fun than a “state … Continue reading

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Assembling the Chameleon Loop Antenna: AD #54

This is the Chameleon CHA P-LOOP 2.0. This video shows that it indeed fits in the canvas bag, and also shows assembly in an unhurried way so I can give tips and helps. You can see a list of Ask … Continue reading

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Solar Power for your Ham Station AD #52

Can you power your station from the sun? Absolutely! This video explains solar power from the panels and batteries to charge controllers and sizing. You can see a list of Ask Dave videos by clicking here. You can ask a … Continue reading

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A Simple Look At a Basic Amplifier, AD #51

One of the basic building blocks of radio is the amplifier. Let’s look at the theory behind a simple transistor amp, breadboard it, and test it! You can see a list of Ask Dave videos by clicking here. You can … Continue reading

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DX and the Radio Amateur: Ask Dave #47

What’s DX? How does it work? Is it something you want to do? Give it a try! This video tells how. You can see a list of Ask Dave videos by clicking here. You can ask a question by clicking … Continue reading

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From Data Modems to Sound Cards: AD #46

We use sound cards for lots of digital modems. Why? This episode explores the history behind creating the tones we put on the air. You can see a list of Ask Dave videos by clicking here. You can ask a … Continue reading

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Understanding Oscillators: AD #45

Where do radio sine waves come from? From oscillators! This video delves into a simple audio phase-shift oscillator to see how they work. Included is a look at a breadboarded oscillator on an oscilloscope. You can see a list of … Continue reading

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