There is a way of extending the TX frequency range of the FT-450 transceiver. The so called “MARS” (“Military Affiliate Radio System”) modification provides out-of-the band operation of the transceiver. You can operate anywhere within the range 1.8-50 MHz after the transceiver has been modified.
The modification is simple. Just remove jumper JP4002 on the control pcb and make some settings. A description of the mod can be found here:
http://www.santerweb.net/wp-content/uploads/2013/01/MARS-Mod-for-FT-450.pdf
YouTube shows the instructions as well. For example this one for the FT-450D:
https://www.youtube.com/watch?v=u8kqyekwPxc
Example of out-of-band operation:
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It took me some courage to open the transceiver and do the mod, but in fact it turned out to be rather simple.
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The modification is simple. Just remove jumper JP4002 on the control pcb and make some settings. A description of the mod can be found here:
http://www.santerweb.net/wp-content/uploads/2013/01/MARS-Mod-for-FT-450.pdf
YouTube shows the instructions as well. For example this one for the FT-450D:
https://www.youtube.com/watch?v=u8kqyekwPxc
Example of out-of-band operation:
Jumper to be removed:
