Although its original radios were reported as being damaged in its capture, Tiger "131" now has radio devices stored in it, or at least that's what we see when internal views are occasionally published. The most recent images that I can find, date from 2013.
But, of the three radio devices that were present back then, one of them had no business being in Tiger "131", or indeed any other normal Panzer. It's not clear if the Tank Museum believe that it belongs there, or if they are merely using "131" as a place to store one of their artefacts. Either way, as long as that device remains in place, it is a gross inaccuracy in the restoration of "131".
Panzer radios
For most of WW2, the standard radio set for Panzers comprised these two large boxes: a transmitter and a receiver.
Medium and large Panzers, like Tigers, had room for three of these boxes. The third slot was intended for an extra receiver, so that the tank could listen on two channels; but it was usually just the company commander who had one. The extra receiver, if present, would be another of the same type.
The inappropriate device
Here is the radio zone inside Tiger "131", from the video "Inside the Tanks: The Tiger I - part V".
Item [A] is the standard transmitter, and the matching receiver is at [B]. The device labelled [C], that doesn't seem to fit into its slot, is not supposed to be inside a rank-and-file Panzer. It's a type that belongs in a battalion commander's tank.
Comparing this photo to the previous one, you will see that the Tank Museum has not "wired up" these radio devices. I don't know if they work, or if their power supplies work. It's possible that the Museum is merely using "131" for storage, which would explain why the third box is here. Unfortunately that can mislead those who use "131" as a historical reference: indeed, the narrator of the video states that these are the tank's "original radios".
Could it be correct?
Is it possible that "131" really did carry this third receiver for some reason? We don't know what selection of radio sets was inside Tiger "131" when it was captured. The British wrote a detailed report on the contents of this Tiger but they hardly mention its radio equipment, probably because they were already familiar with the devices.
One good reason to believe that this item's presence is an error, is that the British didn't mention it. They would have known what radios to expect in a Panzer. Another good reason, is that this receiver needs a quite different antenna to what "131" had.
In summary
Tiger "131" almost certainly contained only two radio devices when it served with the Wehrmacht; a transmitter and a receiver. They could have been stacked vertically or horizontally inside the tank; there is one wartime photo that suggests they were horizontal, i.e. occupying the top two positions in the storage frame.