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!

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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.

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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 flashlight work reliably again.

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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 of the channel video.” Tell me what you think.

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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.

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Unboxing of Chameleon CHA P-LOOP 2.0 HF Loop Antenna

This loop might be the solution for the many hams who’ve written me asking about antennas for covenant-restricted communities and high-rises. I unbox the Chamelion CHA P-LOOP 2.0 HF loop antenna.

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Posted in Ham Radio blog entries, Video | 1 Comment

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.

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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!

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Thanks for you patience as we bring the website up to date

Sorry about all the posts showing up suddenly (including this one)!

I was way, way behind on posting my YouTube videos to my website, so I hired Kael, a teenager, to help me bring it up to date. He’s a great kid, a senior in high school, and very talented with computer stuff. My website now matches what’s on YouTube, which is important since a significant part of my YouTube audience finds the videos via my website.

Thanks for your patience. The blitz is over. My apologies for having to delete so many extraneous posts.

I enjoy your subscribership and hope that I can continue to provide content that you find interesting and useful.

73, Dave, KEØOG

Posted in Computer Tips | 3 Comments

BITX-40 Fix for Galloping VFO

The BITX-40 Raduino-based VFO has a horrible habit of galloping up or down the band at the most inconvenient times. This simple mod fixes the problem. The schematic showing the original circuit and the modified circuit is shown below the video.

Schematic showing existing and the modification, by KEØOG

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