UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Tricky way to extend 100MHZ FM range to 108MHZ

richrussell · 27th Dec 2010, 7:58 pm

You can buy 'band expanders' for when Japanese cars are imported into the UK, as the Japanese FM radio band is 76-90MHz so the original car radio isn't much use (unless you only listen to Radio 2).

They cost around £10-15, and just got inline with the aerial lead (plus take an 8-15V dc supply) and shift the 90-108MHz range down into the 76-90MHz range. You end up with the two ranges overlapping.

I would guess they use a circuit very similar to the one posted above. They work very well, and are convenient small metal boxes about 4cm x 2cm x 2cm that you could tuck away inside the chassis of most radios nicely.

27th Dec 2010, 7:58 pm	#4
richrussell Heptode Join Date: Jul 2008 Location: Selby, North Yorkshire, UK. Posts: 979	Re: Tricky way to extend 100MHZ FM range to 108MHZ You can buy 'band expanders' for when Japanese cars are imported into the UK, as the Japanese FM radio band is 76-90MHz so the original car radio isn't much use (unless you only listen to Radio 2). They cost around £10-15, and just got inline with the aerial lead (plus take an 8-15V dc supply) and shift the 90-108MHz range down into the 76-90MHz range. You end up with the two ranges overlapping. I would guess they use a circuit very similar to the one posted above. They work very well, and are convenient small metal boxes about 4cm x 2cm x 2cm that you could tuck away inside the chassis of most radios nicely.