Retrofitting radio controlled clock

[notorious]

OEM place for receiver is difficult to reach. I tried via passenger footwell and there is no access. There is no other convenient place to position sensor in high enough location at passenger area, so I put glove box back and forgot about passenger side option.

I tried to install receiver inside visor, which is above instrument cluster. Visor is hollow inside. Slot inside visor is great in geometry terms and is conveniently placed above everything. But car lost signal after 3 days. Interestingly, receiver works tip top on top of visor.

There is plenty of space right behind instrument cluster and there's a lot of space behind knee panel. I just don't want to randomly test different locations, as testing location is cluster in/out job with risks to scratch trim, etc. And it takes 3 days to understand if reception is good. And I don't want to mount the thing permanently, drive for a couple of months, and then understand that location is suboptimal. I'm now doing research to understand long wave receivers, understand antenna theory, etc.

Also, in newer models Audi moved receiver behind rear bumper cover, so it stays outside chassis of the car and there's only a layer of bumper plastic separating it from street -- maybe there is a reason for that. Audi now use newer receivers. Electrically they are compatible with old ones. This is all very interesting.

I opened receiver case and I studied circuit board that demodulates signal and sends pulses to cluster for software analysis. Interestingly, they used cheap low gain antenna. I'm thinking of proper antenna and emailed German company who specialise in this stuff.

I appreciate horse wants to drink, but bare with me -- if I started to bite a bone it won't easily fall off my mouth.