Quadrature detector coil
Here are photos of the elusive 235SU1 coils. One will be disassembled in the name of science! It can be…
Tuned Front End for FM receiver
The Ryder paper (here) uses a tuned front end. The specified coils (Toko E526HN-100319) seem to be unobtainable, but surprisingly,…
Modern take on Ryder’s FM Receiver
The link here shows an FM receiver with a high level of claimed performance. The diagram here shows a snippet…
Another Test Probe
This one used an SMA plug, so it is a bit more versatile. The SMA plug was from Maplin. The…
More TEF6606 info
For the circuit that was constructed for testing (based on the Application circuit in the data sheet, the v3 copy…
Simple op-amp based headphone amp
This single-IC circuit is pretty basic but is enough to get the TEF6606 audio up to (very loud) headphone levels….
Implementing I2C
The ATmega32u2 doesn’t have a two-wire interface (as far as I can tell) or I2C, so this method was used…
TEF6606 receiver
As an experiment, I constructed up this FM receiver. It worked first time – no coil adjustments are necessary. It…
Test probe
This test probe is based on an SMA connector and spare test probe parts: Side view: Parts used: Pomona test…
XCircuit on Windows
XCircuit is a drawing program ideal for circuit diagrams, but also for other purposes. I compiled it to run on…