Arduino CTCSS single frequency


Some time ago I've published an article how to build a CTCSS encoder using an Arduino.

Now I've receive a question from Konstantinos, SV1ONW where the answer might interest other people too.

He wanted to use the CTCSS encoder in their local repeater, but for this only a single tone is required,
and to avoid the need to select the correct tone with the up/down push-buttons he asked me if it was
possible to have the encoder produce a single tone only.

QO-100 - uplink good practice

Activity on the first geo-stationary Ham-Radio satellite is full swing now !!

It's nice to see how power levels of as low as a few 100 mW with a cheap consumer satellite dish are sufficient for a transmission distance of 36.000 km ...

Several homebrew hardware projects are now also showing up and one of them is "POTY" a Dualband feed one can mount on a consumer dish.
This feed combines a 2.4 GHz right-hand circular uplink with a 10 GHz Horizontal downlink.

Converting CB radios to 70 MHz

When I was at the "Dag van de Radio-Amateur" or "Ham Radio day" in the Netherlands recently, I've met this interesting Ham Ha, PA5HE.

He's been busy converting several old CB radio's into Ham Radio transceivers for the 4 meter or 70 MHz band.

Some are really smart where he'd actually replaced the existing 7-segment display with a small OLED display capable of showing the full digit frequency.
Isn't that cool ?!!

It's in dutch so for the non dutch speakers not all info might be clear, but I'm sure a handy ham can find enough to get inspired: