Yes, FT-241 crystals with channel numbers ranging from 270-389 are for the BC-684. Those with channel numbers ranging from 0-79 are for the BC-604.

73,

John K9WT

On 1/9/2026 5:29 PM, Hubert Miller wrote:

FT-241 crystals, are the 200 – series and the 300 – series, both parts of one completer set for a radio, probably BC-684 ?

Hard to get a clear knowledgeable answer from the internet. ( Of course – and AI is just blather. )

Is the container, the CS-79 ?

thanks-

Hue Miller
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