Re: [time-nuts] 10 MHz low pass filter

2012-08-09 Thread Orin Eman
-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] 10 MHz low pass filter 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

Re: [time-nuts] 10 MHz low pass filter

2012-06-21 Thread John Lofgren
] On Behalf Of Thomas S. Knutsen Sent: Wednesday, June 20, 2012 6:57 PM To: li...@lazygranch.com Cc: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 10 MHz low pass filter I don't have any problems with rotating the inductors, after all, that is one of the best way

[time-nuts] 10 MHz low pass filter

2012-06-20 Thread Joseph Gray
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.

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread paul
On 6/20/2012 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.

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread Bob Camp
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

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread lists
MHz low pass filter 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

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread Thomas S. Knutsen
time-nuts@febo.com Subject: Re: [time-nuts] 10 MHz low pass filter 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

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread Joseph Gray
I thought I'd put one on a FE-5680A and see what happens to the third harmonic. It might also be interesting to see if I get a decent sine wave out of the filter with a square wave in. Joe Gray W5JG On Wed, Jun 20, 2012 at 3:49 PM, Bob Camp li...@rtty.us wrote: Hi That's a pretty high order

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread lists
and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] 10 MHz low pass filter 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

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread Thomas S. Knutsen
...@gmail.com *Date: *Thu, 21 Jun 2012 01:17:02 +0200 *To: *li...@lazygranch.com; Discussion of precise time and frequency measurementtime-nuts@febo.com *Subject: *Re: [time-nuts] 10 MHz low pass filter Based on that PCB, I want to see an sweep to at least 1GHz. The reason is that experience have

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread Bob Camp
: [time-nuts] 10 MHz low pass filter 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

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread Bob Camp
Hi The standard FE-5680 very much has an LC filter between the output amp and the output pin. I'd take out their filter and put this one in. I would not use both together. Bob On Jun 20, 2012, at 7:23 PM, Joseph Gray wrote: I thought I'd put one on a FE-5680A and see what happens to the