Another long-awaited announcement:
http://www.ke5fx.com/heather/readme.htm
Highlights of V3.10:
- No longer a beta!
- Added support for Nortel NTGS50A-series receivers
- Added support for Resolution-T and Resolution SMT receivers
- Various other stuff added by Mark in the 18 months
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.
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.
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
Le 20/06/2012 10:22, John Miles a écrit :
Another long-awaited announcement:
http://www.ke5fx.com/heather/readme.htm
Highlights of V3.10:
- No longer a beta!
- Added support for Nortel NTGS50A-series receivers
- Added support for Resolution-T and Resolution SMT receivers
Thanks
Le 21/06/2012 00:13, mike cook a écrit :
Le 20/06/2012 10:22, John Miles a écrit :
Another long-awaited announcement:
http://www.ke5fx.com/heather/readme.htm
Highlights of V3.10:
- No longer a beta!
- Added support for Nortel NTGS50A-series receivers
- Added support for Resolution-T and
Le 21/06/2012 00:18, mike cook a écrit :
39.517°N, 76.794°W
Recognise it? Flashy place near Baltimor.
Oops I just looked at the installed properties and see they point
to a LH server. Aargh!
All OK now.
___
time-nuts
If the output is buffered, there really shouldn't be a problem.
Incidentally, I can crank out high order LCR filters all day just by
transforming prototypes out of Zverev. But it has been my experience at even
10MHz the parasitics of the elements will throw off the design.
-Original
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of mike cook
Sent: Wednesday, June 20, 2012 3:28 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lady Heather V3.10 release
Le 21/06/2012 00:18, mike cook a écrit :
Based on that PCB, I want to see an sweep to at least 1GHz.
The reason is that experience have shown that the inductance (perhaps 10nH)
in series with C2 and C6 would damage the stop-band rejection at UHF.
Used with an OXCO this would not matter, but the desire to make the
ultimate filter is
I had a power glitch last night. It shows up as a step on the 60 Hz
clock-drift graph. That reminded me that I had another glitch a few weeks
ago.
16 seconds:
http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2012-Jun-20-gap.png
0.1 second:
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
In the days when I had access to a network analyzer with a chip component
fixture (all calibrated of course), I tested components on hand just to see how
ideal they were. Chip resistors are quite good. The inductance is basically the
electrical length of the device. Caps can be decent. My
I don't have any problems with rotating the inductors, after all, that is
one of the best way to avoid coupling between them, but the main problem as
I see with that board is that there are 2 caps that would become an series
resonance with the inductance in the via to reach the ground plane.
Of
Hi
The next sine wave OCXO that I see with a buffered output will be the first
one. Every one I've seen has an LC filter between the output amp and the
connector. If you are lucky you might have a pad, but that's not much to count
on.
Bob
On Jun 20, 2012, at 7:01 PM, li...@lazygranch.com
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
I had a power glitch last night. It shows up as a step on the 60 Hz
clock-drift graph. That reminded me that I had another glitch a few weeks
ago.
16 seconds:
http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2012-Jun-20-gap.png
0.1 second:
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