In 1998 a large quantity of VHF FM92 radios hit the market at give away prices. The MWRS had obtained enough to supply every member at the time, many took this opportunity, they were cheap and robust. They were not small but most of them came with a remote head. Many ended up as a second radio in spare cars and in the shack. The Society has a fully operational one installed in the radio shack, connected to a flower pot aerial.
Most of these radio didn’t have the CTCSS option. Now that many repeaters require a CTCSS tone for activation, they are not as useful as before.
We have recently (July 2016) installed CTCSS to the club’s one, using a generic CTCSS board (ours is a C1114 from SIGTEC) connected to the 8pin DIN plug behind the radio. The 8pin DIN plug provides audio in (pin 5) and audio out, PTT, 12v (pin 8) and ground (pins 2 & 3). Our board is set to 91.5Hz and always on. It is contained into a TicTac box.
Other users may prefer to have an on/off option and be able to also select 123 Hz which is also used for some repeaters.
Hi Guys tried this on an F92, but no 12 volts out on pin 8 to power it, did try powering the unit with 12 volts from elsewhere , and injecting tone into pin 5 ,but no tone on TX, I assume this works for FM900s FM92s
Eric, there were few different versions of the radio in Australia. This worked on the 50 odd radios we purchased bulk from an auction, the pin out of the radio you have may be different.
Hi, are these available for purchase, I need 91.5 to access my local repeater.
Cheers,
Mick vk3pmg.
Mick
There are quite a few versions available around. We just had a Trash & Treasury yesterday (Sun 28-May-2017) and there was a box full of a similar version. Encoding is much easier then decoding. Commercial, radio ready are quite dear. I’d probably try my luck on VKclassified “wanted”.
Thanks for the quick reply
Just thought of something else if you can’t find a board, you could buy an MP3 player on fleabay for around $1-$5 delivered, record the tone for say 1hr and play in a loop. A 5v regulator (7805) would keep it running.