Restoration
of the Sony ICF-6700L - nr 2 (1979)
1. OLD
I bought this ICF-6700L on Ebay, cause you don't see them too often. It
was advertized as perfect and indeed it looked like it. My bid was a
lot below buy-it-now but the seller still accepted. There was some
dirt and the battery compartment was not 100%, but some effort had been
done to clean the radio. All lettering intact and all switches were
fine = this unit has seen little use! On shortwave, it sounded like
something was oscillating though, or at least a bit restless.
2. NEW
Having fun on 40 meters amateur band
a. Clean with water and soap
b. Upon providing the radio with a decent ground oscillation went away
and upon testing this radio sounded very fine on all bands... I haven t
done any further lab work on it.
3. OPEN ISSUES
None really.
4. SUMMARY
Very nice unit...
having long wave instead of AFC is interesting. I used it for a while
as amateur receiver and apart from having little selectivity, it is
very comfortable to listen to.
5. DOCUMENTATION
Good documentation is hard to find. BAMA scans are low quality. Here
are good scans of schematic and components:
schematic
diagram Sony ICF-6700L
component
placement Sony ICF-6700L
Interestingly, this radio has built-in provisons for an external FM
antenna on the MW antenna input. A 15pF C connects to the FM input
circuit. This is not found on the 6700W.
Serial number 22585
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