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The AD-203 is prone to oscillation and there is no provision for the SSB switch. The RFX units are the way to go. The fet's blow real easy because you don't have a very good heatsink and then you are also forced to use an external speaker.

[QUOTE="Tallman, post: 557306, member: 32129"] The AD-203 is prone to oscillation and there is no provision for the SSB switch. The RFX units are the way to go. The fet's blow real easy because you don't have a very good heatsink and then you are also forced to use an external speaker. [/QUOTE]

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