Category Archive: Electronics

Oct 09

QRP Labs VFO Review [Spoiler: we love it!]

I’ve had the QRP Labs VFO for many many months now and it’s about time I got around to actually writing a review of it. When I originally purchased my BITX40, it did not come with a digital VFO. With the analog VFO, tuning was an exercise in futility. I had never owned an HF …

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Sep 25

QRP Labs U3S WSPR Transmitter Build and Test

The QRP Labs U3S is a multi-mode transmitter kit. It outputs 200mw of power on any band you have a filter for, and is extendable to up to 6 bands that it can rotate through. It’s only $33 and is incredibly capable. Let’s check it out! I received the U3S in April 2017, but was …

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Sep 18

Catching up with MiscDotGeek: September 2017

It’s been a busy month at Chez Geek. This post involves an improvised lathe, a burrito, Linux, antique cast iron, and a duck. We’ve been working on projects off and on, and have had some family health issues to muddy the waters as well.  Rather than tell a big long story, here’s a few headlines …

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Sep 03

An Inexpensive Digital Multimeter for the Thrifty Ham

When playing with ham radio or any other electronics, it’s pretty obvious that you need a Multimeter (DVM, Meter, whatever you want to call it) and if you’re like me, you’re on a bit of a budget. For me, I wanted to accurately set the bias on the IRF510 PA in my BITX40. This requires …

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Aug 10

Converting the BITX40 to 20M

20m BITX40 conversion [UPDATE 8/18/2017]: After further experimentation I have found that the LPF must be switched at both ends. Read further for more details. In a Previous Post, I wrote about adding an 80m Band Pass Filter and switching it out for the 40m filter, essentially adding a second band to the BITX40. That works …

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