GPS sources for radio etc

[bromleybysea]

Thanks chaps. All very helpful. I'm having the Garmin tested by Mainsbrite and if it's economical to replace the internal battery I'll go that way, otherwise I think the GPS antenna and power supply might be the way to go.

 

[erbster]

I use a garmin 72 for the same purpose (yeoman and disc radio); they can be had for about £50 s/h on fleabay.