[time-nuts] PTS X10 Synthesizer - Retuning

[John Ackermann N8UR]

Ed, I've thought about moving my 10 - 20 MHz unit as well.  At one 
point, I contacted PTS and they confirmed that the unit could be 
modified by changing the filter module(s) -- not sure if there was more 
than one.  They quoted a couple of hundred dollars to make the change, 
so I didn't pursue it.

If you are successful changing yours, I'd certainly be interested in the 
details.

John
----

On 4/25/2011 3:03 PM, Ed Palmer wrote:
> I know that some of you have X10 synthesizers so I hope this isn't too
> far off-topic.
>
> The manual shows that the frequency decade the unit covers is determined
> by the PFF module. This module is nothing more than a 4-stage passive
> filter (might be described as a helical filter - not sure) that selects
> the correct 10 MHz harmonic of a fixed oscillator.
>
> Has anyone attempted to retune this filter to shift their unit from one
> decade to another? I'd like to move mine from 10-20 MHz to 0.1-10 MHz.
> This would require retuning the filter from 160 MHz to 150 MHz.
>
> Thanks,
> Ed
>
>
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