VE7XEN's electronics blog

Quansheng TG-45UV Protocol Reversing

On a whim, I recently purchased the apparently new Quansheng TG-45UV to replace the Quansheng TG-UV2 I lost this last summer. A review and/or video might be forthcoming, but in the meantime I spent some time reverse engineering the serial protocol / data structure. If you have one of these radios and want programming software, the Quansheng TG-K4AT UV software works and is what I based my efforts on.

Project Start: tinyCounter low power HF frequency counter

I've ordered myself an EA3GCY ILER-20 kit, and being a single-band QRP hand-tuned radio, I want a convenient counter. I'm going to be using this in the field on battery power, so it's got to sip the juice and be small (tiny!) and light. The design should be suitable for any small HF rig (and maybe 6 metres) with an easily accessible point to measure the VFO. I put together a design and just ordered PCBs. Read more →

Commitment.

DSCF1907.JPG It's been a while since I've posted here, and many of the things I pledged to follow up on... haven't been followed up on. I've started several blogs in my life, and never seem to get past the 10 past mark without losing interest and giving up. This one's no exception, but if anyone is following this (or reads it in an archaeological dig 100s of years from now), here's the short version: Read more →

Workman WEP2000 - killed!

A couple posts ago I mentioned the WEP2000 I'd purchased to give mobile VHF a try, contrary to my original plan to just use it for APRS. For a while, I was reasonably happy with it; it was a pain to tune, but I was getting good signal reports and receive was good enough for my purposes. In the past week or two though I'd noticed that while it was working, the receive power was much lower than it should have been, so I went to check the tuning on the through-the-glass box on the rear window. Read more →

Antennas Ordered & Future Projects

Shortly after getting my ham license I started fooling around with antennas. Built myself a very shoddy 2m ground plane 1/4 wave just to get an antenna outside for use with my HT, as the whips can't get anywhere from inside. Then I decided to upgrade to a proper antenna - a coaxial dipole design by W6NBC published in the July 2009 QST. This worked fantastically well for a couple of months, then a solder joint broke between the antenna connector and the radiator element. Read more →