[time-nuts] 10 MHz low pass filter

Bob Camp lists at rtty.us
Wed Jun 20 21:49:37 UTC 2012


Hi

That's a pretty high order filter. The output of most OCXO's already has a filter on it. Combining two filters (especially high order ones) without isolation between them is not a good idea. The resulting transfer function will not be what you expect it to be….

Bob

On Jun 20, 2012, at 4:54 PM, Joseph Gray wrote:

> I came across this filter design recently and thought I'd build a few.
> 
> http://www.jwmeng.com/AppNote/AppNote003.html
> 
> I was about to place a Mouser order when I came across someone selling
> filters, based on the above design.
> 
> http://www.ebay.com/itm/10-MHz-filter-kit-for-tcxo-gps-pll-/110893777470
> 
> The price with a board seemed low enough that I ordered a few. I'll
> let everyone know how they work out.
> 
> Joe Gray
> W5JG
> 
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