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Old 27-11-2005, 15:04   #1
oe6rcd
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Join Date: Dec 2003
Posts: 1
SONY ICF-SW30 Modification

It is very easy to modify the SONY ICF-SW30.

1. Open the back cover (4 screws marked with an arrow)

2. Take IF signal from Q17 (located above CX20111), GND from a nearby pin (see enclosed picture).

I recommend to add an addional IF Filter in the signal path to the IF-Down Converter. This will give a slight better S/N Ratio.

The 2nd. IF Frequeny of the SW30 is 460 khz. You must tune 5 khz above the desired freqency if you are using a IF Converter that is designed for 455 khz.

DRM reception is very good with this receiver.

I am using an IF Converter with NE 602. Reference frequency is generated from a PAL Xtal (4,433 Mhz) divided by a 4017.
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