[Squantos]

Can 10 meter be used for CB/SSB or does it have to be modified an is that modification legal ?

[Yo-Yo]

Back in the day (late 70s) you could (illegally) use a 10 meter linear on the 11 meter CB band.

The FCC frowned upon this use, and eventually all 10 meter linears had to be manufactured so that they could not easily be used on the 11 meter band.

[Nowhere Man]

Can 10 meter be used for CB/SSB or does it have to be modified an is that modification legal ?

Only type accepted (by the FCC) radios can be used on the CB bands. I know in many countries, they sell radios that can continuously transmit from 26 to 30 Mc so they cover both the CB and 10 meter amateur radio bands as well as the "freeband" from 26 Mc and above. Some of those radios are sold here but those features are locked out but many radio hackers can go into the radio to enable them. I know of one "freebander" I deliver auto parts to. Another thing to remember is that CB radios are limited to 4 watts output AM and 12 watts PEP (Peak Envelope Power) on SSB. So those radios would not be legal to use. As an amateur radio operator, I would stay within the law. I think the FCC would be harder on me and other amateurs since "we should know better" than if an average Joe would use such a radio. However, if the crap hits the fan, the laws might become moot.