Passive CW headphone filter
This filter is a plug in adapter that has no batteries but gives very good performance by G8MNY
Visit Passive CW headphone filter DXZone Resource Page
Download passive_cw_headphone_filter.pdf file from 62.49.17.234
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This filter is a plug in adapter that has no batteries but gives very good performance by G8MNY
Visit Passive CW headphone filter DXZone Resource Page
Download passive_cw_headphone_filter.pdf file from 62.49.17.234