[Lowfer] Can a DDS replace the crystal in an oscillator ??

[Mike.WE0H]

I have a FCC-1/FCC-2 MK-II DDS VFO which is as stable as my 3mc oven 
oscillator. It doesn't drift at all. I suspect you are looking at one of 
Doug's DDS kits. I'd say do it. Worst case you end up with a awesome DDS 
signal source for the bench.

What is the reference oscillator freq in your 10m rig? Silicon Labs has 
some very stable programmable oscillators. Might be able to replace the 
existing xtal oscillator in that rig with a SI5xx series oscillator IC.

Mike
WE0H





Andy - KU4XR wrote:
>  
> 
> I don't know, so I ask. The HTX-100 10 meter rig drifts unacceptably
> to use it for slow mode work. Can I replace the aging crystal in the
> oscillator circuit with a DDS unit to obtain better frequency stability ??
> An un-noticable drift at 28 MHz, when converted down to LF becomes
> excessively noticable, and makes many modes un-usable.
> Using the 10 meter rig to drive the homebrew HF to LF Transverter.
> It works well, but the radio drift hurts. So a $50.00 DDS unit will be
> a lot cheaper than buying another late model radio to use with the
> Transverter.
> 
> Thank you, and 73 :::
> 
> Andy - KU4XR - EM75xr - Friendsville, TN. USA