Here
are some higher resolution images of the
R5223 Reception Set.
Top view. You can see the two i.f amplifiers and the detector agc unit
have had their original coils removed and replaced with transistor
radio coils. This has worked well. never attempt to adjust the original
coils, they will just disintegrate. You can see that every sealed can
has had to be opened. They were only soldered shut, a stout knife and
chisel will will removed enough can to get at the components.
Rear view, you can also see the modifield agc detector unit, again this
had to be done because the original coils disintegrated.
My replacement IF transformers, a pair of transistor radio IF cans
connected back to back mimics faithfully the charateristics of two hi Q
coil resonators. Gain was not lost by doing this.
The metal plate lower left, holds all RF unit coil slugs. It rides up
and down to fine tune each band over its one megahertz bandspread. This
a superb acheivement or micromanagement at its worst. However, the
extraordinary sensitivity or this radio speaks for itself....when it
works!
A view of the detector and AGC unit with my Hamification, a ceramic
resonator, required after I attempted to adjust the original coils
resulting in their destruction.
The master oscillator crystal bank next to the front RF unit can.
mod record Tue May 26 14:07:35 EST 2009
