How Many Radios?
Wondering whether to fit Two VHF radios to the build?
If you install the
Garmin (Apollo) SL40 you will end up with "1.5" radios, as you can listen to the standby frequency. It is also capable of loading you frequencies by RS232.
Should be just over $1800 US
The latest Icom and XCOM for example have dual watch capability. Two radios are a little more complex and require some kind of mic switch or audio panel so a little more complex.
There are 2 really good audio panels for sports / experimental:
Both units are priced under $1000, there are a number of dealers in Australia.
OZpilot have got all the prices online, but so far I have found them the most expensive out of all the Garmin dealers.
My -7 will have both the GMA-240, and SL40.
Have a look at the install manuals for the garmin sports equipment, the last chapter has the 'simplified' wiring diagrams.