Hello David, To summarize your explanation 1) On 12m, set the band switch to 10m 2) On 17m, set the band switch to 15m 3) On 30m, set the band switch to 20m However, need to tune and load properly You did not make any modifications to the SB220. Is this correct? Thank you replay Kouichi Ueno JI1FGX/DU9