[K3PZN-List] Antennas

[Kyle Thornton]

Hi all, 
This is probably a very dangerous question but I am hopefully get a Yaesu ft-8900r with a Signalink. My antenna is a dual band only 2/70cm vertical and I would like to at least get on 6m. Is it possible to tune the antenna enough to work on 6m? I believe I have heard when you tune an antenna you are making it electricly longer or shorter. So is t possible to make it electrically long enough to work on 6m until I can get a 6m/10m antenna. 
Kyle 

73 
KC3FMP