Case of TD-357A. Simple Function. Teishin aluminum case TD-357A (120 mm in width, 160 mm in height, 100 mm in depth) is large enough to contain the circuit of P6. I added rubber feet to the case. Provision of an external voltage doubler rectifier unit facilitates measurement of peak-to-peak values. With the P6, such a unit is very useful for oscillation circuit check. Commercially available measuring devices have complex functions. In my opinion, home-made measuring devices need not be complex. The electronic voltmeter P6 has such simple functions that no one can forget usage.
