ER-753A (late version)
There are several versions of this
rare receiver. Housed in a beautiful mahogany case, this version
is dated May 1923. The
Radiola I is a simple crystal receiver with a somewhat complex
detector assembly. Most crystal detectors have a "cat's whisker"
and a chunk of Germanium for the "crystal" part. This special
detector, called the "Perikon" uses two rather rare crystals, Bornite in the fixed cup and Zincite in the movable (upper) part
and I must say, it works quite well.
The difference between this one and
the 1922 version are:
"Radiola I" is engraved in the panel
the panel engraving has no paint fill
decals on the rear inside cover
Perikon Detector info.