[simpsons]

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Your photo of the pc board and broken coil are just what was needed.

It looks as though the coil can be re used BUT you do need to download the schematic for the Grundig Stereo Decoder 4 stated earlier. It doesn't matter if reading a circuit diagram (schematic) is not one of your skills, we can walk you through this as follows.

Please skip the following if necessary.

The coil is shown on the circuit diagram is part BY 9235-103. The coil has a beginning and an end and is called the primary. The start of the primary, is connected to the plate of the ECC81, pin 1 and the finish to the ht supply. These connection are also made to capacitor C3. It so happens that the capacitor C3 is clearly seen on the photo you have taken, connected across the coil former. This should help you identify how the coil was orientated on its former.

Once you have identified the primary, the other coil, known as the secondary is similar to the primary in that it has a start and finish but importantly the centre of the coil is brought out to make a connection. This is known as the centre tap.

The centre tap is connected to another coil part BY 1225-104 as shown on the schematic. This you must locate.

The start and finish of the secondary are connected to pairs of diodes which are connected back to back. That is the cathode of one is connected to the anode of the other and then joined connections one pair of diodes to the start and the other to the finish of the secondary. I can see the diodes clearly in the photo.

Hopefully, the tail ends, the wires still poking out from the coil former will make it all come clear.

After "super glueing" the coil back onto the former, make good the connections using new single core wire soldered onto the pins, then being careful not to break the enameled wire solder it accordingly.

Sorry to be pedantic but making a mistake will cause no end of issues.

Chris



The secondary