Sony Corporation, Tokyo
ICF - 6700 W / L
überarbeitet am 23.10.2010
The Sony ICF-6700 W/L is a multiband shortwave receiver with the typical square design very similar to the ICF-6800 W, with this set it can be easily confounded. The conventional double conversion set with manual preselector (covering longwaves only in the L variant) is technically less problematic then the better known ICF - 6800 W suffering very often from "dead" band segments.
The Sony ICF-6700 has it's strange rectangular "bread bin" shaped cabinet
in common with the ICF-6800, in contrast to the '6800 which is a double conversion receiver based
on the Wadley Loop cirucuit is the ICF-6700L a conventional double conversion
superhet with a frequency counter.
The left third of the front panel is taken by the speaker grille, just below,
You find the headphones jack and the rotary volume, bass and treble controls.
On the right half of the front panel, You find at the top the small dark red
LED frequency counter and next it the preselector dial, the preselector control is located
just at the right of it and has to be carefully tuned for a maximum S meter
reading after each frequency change.
The R.F. signal coming from the antenna has to pass the preselector and an amplifier stage and is converted to the first intermediate frequency of 10,7 MHz in the first mixer, after having been mixed to the second i.f. of 455 kHz, it has to pass the i.f. bandwidth filters and is handed over to the AM and SSB product detector. In the FM mode, the receiver acts as single conversion superhet with the standard i.f. of 10,7 MHz. This frequency used as first AF in the AM bands too, is the reason for the gab in frequency coverage between 10 - 11,5 MHz
In practical use, the ICF-6700 is a receiver straightforward to operate.
In contrast to the cumbersome electronic and machnic design of the ICF-6800W,
the ICF-6700 is based on a standard double conversion design connected to a
frequency counter, it's sensitivity is slightly below that of the ICF-6800W,
and the i.f. filters - similar to the ones used in the early versions of the '6800,
are not that sharp. When You operate the preselector correctly, it performs well
on the bands. For single sideband reception, You have to turn the tuning knob with
caution as the receiver has only one tuning speed and no fine tuning.
© Martin Bösch, 12.2.2005