I learned how to make the Expo A Kit, but looking for a diagram for the Expo S Kit for a few Cobra 25's n Unidens I have. Could someone please post a diagram on building one?
Thank You....
Thank You....
The S kit came in two versions. A "plus" and "minus" version.
The reason you can't get one with both upper and lower channels has to do with the dirty trick behind the kit. Since you can't change this PLL chip's coverage, you change the first IF frequency of the receiver. Requires that you jump around the 10.695 first-IF filter in the receiver. Stretching this stage of the receiver to cover that wide a range of frequencies is pretty much the limit. Stretching it far enough to get both upper and lower channels just doesn't work well.
I was not impressed by the way a radio's receiver worked after this kit was installed. Didn't sell very many of them.
73
I built an A kit n tried to make it work, but it didn't lol.