type 31 set,
is one of the first models built on large scale completely by
Radiomarelli in Milan.
radio was designed on the basis of the American Bosch mod. 5, its production began in
October 1931, and in 1932 was about 10.000 pieces.
to the American Bosch version the Coribante has the wood case in a
different shape, itís most decorated and is possible to open the
top side. The chassis is very similar to the one of Bosch 5 but it was entirely made in the Radiomarelli factory in Milan.
This set has the medium waves only and works with direct amplification
coupled cascade stage circuits.
for some time, the Radiomarelli used the mythical valves Arcturus
with blue cobalt glass: 551, 551, 124, PZ, 180.
Exist a version, built in a few pieces, that can also
receive the Long Waves. In the
rear panel there is a rotating switch that lets you choose between
medium wave and Long Waves (please look at the picture in the left
side of the page).
The published set, instead, is a standard version.
Unfortunately in this radio is missing the original condenser case, to
see an original case, please see at the Radiomarelli mod.5 page, the
case is the same.