I suspect all it would take for the likes of Argosy, Triton, Delta,
Omni [original models], Corsair, and the other non-digital rigs, is the
replacement of the heterodyne crystal used for the 40 meter band.
It is a very small frequency change and the tuned circuits
associated with the crystal oscillator should handle the new crystal
nicely. Since the frequency range would be moving down, the output
low pass filter would do fine. I guess the only question is the
bandpass filter in some of the radios. Again, since the frequency
change is slight, it may work as is or perhaps a slight "tweak" will
bring it in line.
On 20 Aug 2001, at 22:27, Paul E. Sojka, Jr. wrote:
> One of the proposals on the table is the lowering of 40 meters down to
> 6950 or 6900. Can any of the older TT rigs be made to go that low?
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