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Old 8th Dec 2019, 12:05 am   #5
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Default Re: Park Air Electronics 360 Channel Aircraft Band Monitor

50kc/s was the channel spacing for '360 channel' radios, which it has written on its panel.

They went to 25kHz spacing and 760 channels in the late 70s

After the FM band got occupied up to 108MHz they had to require aircraft to switch to broadcast-proof radios, or fit special filters.

They've just stumped up grants for planes to re-equip for 8.33kHz channels. The USA hasn't felt the need to go to 8.33.

David
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