Small but a many functions
An other rare Japanese meter. It is small (14x9x3cm) but heavy. The manual is from model SM.
It has some very unusual functions. It has a separate dB input, a function to test tubes and it can be used as a megger. Besides that it can measure L, C and R
The function knob markings are in bad shape.
To bad the function knob markings are in a bad shape. There are some arrows that tell you what voltage you need for a function. These voltages are stated on the cabinet. For instance in the Rx0.1 meg Ohm function the arrow points at 230-350VDC. So to use it as a megger you need an external DC supply between 230 and 350V. B+ in most tube equipment was in that range.
The display window is real glass but it is not clear. That makes it a bit hard to read.
The meter movement
The input sockets are for + , – and dBm.
The meter is heavy for such a small instrument. The top is Bakelite, the underside is metal. As far as I know it came in a velvet lined wooden box.
The function knob
The function knob is a piece of art.
The inside