Kenwood TM-V71 low power

ON8AD - January 15, 2019 - 2 mins read

…Or not? Here’s a short post about often overlooked issues with supplying power to your mobile rigs (or any rig for what it’s worth..); Here’s the story I told to the owner of a Kenwood TM-V71…

FTdx3000 - Omnirig Digital Mode

ON8AD - December 11, 2018 - 1 min read

Hi All, Just a little something I’ve run in to when setting up my new FTdx3000. I had an OmniRig setup with my previous FT-450; worked like a charm, including SDR-Console tracking, etc etc. I run everything trough OmniRig as I don’t need any virtual serial ports that way, and it works pretty fast and stable. Even WSJT-X works with it. Here’s the deal though: the supplied FTdx3000 profile for OmniRig, puts “Digital-UP”-mode in RTTY-DATA mode instead of USB-DATA mode.

ICOM IC-910h - Preamp bias troubles

ON8AD - November 27, 2018 - 3 mins read

Recently I was asked to take a look at a IC-910h VHF/UHF all-mode transceiver which had developed an issue where the bias kept being enabled. Even on transmit and when the preamp wasn’t enabled. It luckily didn’t cause any havoc as the operator’s antenna wasn’t DC shorted at the time..

If you look at one of my previous posts – you’ll know how a basic bias circuit works (check it out here – SEA remote ATU bias & mods).

The problem here, was that there was no way of turning it off and on. Nothing seemed to be burnt out or shorted on first sight. So what does this look like on the schematic?…