Category Archive: Geeky Stuff

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 19

How to use a Reverse SSH tunnel to reach a server behind a NAT

If you’re reading this, it means my server is online and running. You pointed your browser at my website and connected to my servers IP on port 80. That is totally possible because this is a server with a publicly available IP address. But what if you want to connect to a server that does not …

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Aug 13

20M Inverted V with Lightweight Dipole Center

One of the many joys of being a ham radio operator is building antennas. I’ve covered the L-Match tuner and long wire antenna in the past, and while it’s a great way to get on the air, it is a compromise antenna. It’s not resonant, and so it is less efficient. When you’ve only got …

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Jul 10

The Quest for the Genuine IRF510

The Problem Recently, I had a need to replace the IRF510 PA MOSFET in my BITX40 radio. A malfunction with my VOX PTT circuit caused it to stay keyed down for a very long time while unattended. Oops! With that fixed, it was time to replace the IRF510. The Search I scoured the usual places …

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Nov 16

Amateur Radio: Upgrading from Technician to General

As mentioned in a previous post, I’ve been slowly getting back into ham radio. When I started with Amateur Radio in 1996, there was a Morse Code requirement for all but the No-Code Technician license, which had privileges mostly in VHF bands, above 50mhz. There might have been some 29mhz (10 Meter) privileges, I don’t …

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