[time-nuts] RFG-RB Crystal Filter

[Bob Camp]

Hi

My guess would be that the crystal filter strips the phase noise off of the multiplied 15 MHz and then the little amps boost it back up. If that is indeed what they are doing, the amps should be pretty quiet when running fairly high power signals.

Bob


On Jan 15, 2010, at 10:43 PM, paul swed wrote:

> Actually the little rf amps pretty nice. It will take any signal in and
> amplify it so that you can use a 7 way passive splitter for frequency
> distribution. At least thats how mine worked.
> Its pretty efficient. Can't speak to the noise quality.
> 
> On Fri, Jan 15, 2010 at 10:32 PM, Bob Camp <lists at cq.nu> wrote:
> 
>> Hi
>> 
>> I'm sitting here stripping LPRO-101's out of RFG-RB's and kind of wondering
>> about the other "fine stuff" on the PC board. About the only thing that
>> looks useful appears to be a 15 MHz crystal filter made by either PDI or
>> Netcom. Has anybody gone to the trouble of pulling one off the board and
>> seeing what a network analyzer says about it?
>> 
>> The RFG-RB's were cheap enough that I have no real need to get anything off
>> of the pc board. I just hate to throw away anything that might be
>> useful.....
>> 
>> Bob
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