HEATHKIT HD-1 – This rig came with the LAG-66, and is in reasonably good shape. The previous owner had made a hole on the front panel to insert some HUM control. Bad practice, since the equipment loses its original fashion in a irreversible way. The Voltmeter Cover is becoming darker and I will need to do another scale since the original one is vanishing like the LSG-532. I will restore this unit very soon. I have only the schematics of it.