Pindiode experiments.

I bought a couple of pindiode to make an ALC for the transverter.  It must be a voltage controlled attenuator.

The attenuator worked but I am not happy with the performance. The performance is probably Ok for weak signals but my signal levels are much higher. I see too much distortion of the signals.

Another problem is that the 2 MAR's and the PA sometimes oscillate. I think it can be solved by adding an attenuator between the 2 MAR's. Between the MAR's I will add a fixed attenuator. Before the MAR's I will add some switchable attenuator..