*** SPAM *** Re: [UKMicrowaves] Low cost 10GHz Transverter
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Dominique Dehays
Hi,
No, 80db is what I consider as the limit. I can hear strong spurs from beacon.s 600km away and they are -60 dbc. And it is not weak. 73 Dom |
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John Quarmby
This is what is used in the OZ7IGY Next Gen beacon platform: Not cheap but good PN performance for a 1GHz standard. 73 John
G3XDY On 23/11/2022 21:48, Dominique Dehays
wrote:
Ge Robin |
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Dominique Dehays
Ge Robin
I recall a good design by on4iy using a crystek resonator. If I recall rigth it was in the ghz range and phase noise was rigth 73 Dom |
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Robin Szemeti - G1YFG
That should have read 4153 not 4531 ... quite why they picked those numbers for related parts I have no clue ... probably just to trigger the latent dyslexia ... On Wed, 23 Nov 2022 at 21:15, Robin Szemeti <robin@...> wrote:
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Robin Szemeti - G1YFG |
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Robin Szemeti - G1YFG
I decided to go with a 2 loop solution ... a good Crystek VCO driven by a 4531 and a 4001 to lock the internal reference to an external reference, if it is available. Low bandwidth loop filters make for a slow settling time, but should keep phase noise low. I might even get around to building it one day ... On Wed, 23 Nov 2022 at 20:13, Conrad, PA5Y <g0ruz@...> wrote:
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Robin Szemeti - G1YFG |
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Conrad, PA5Y
Confirmed here.
Conrad
From: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
On Behalf Of Dominique Dehays via groups.io
Sent: 23 November 2022 19:56 To: UKMicrowaves@groups.io Subject: Re: *** SPAM *** Re: [UKMicrowaves] Low cost 10GHz Transverter
Ge,
Hummmm df9np 2ghz measured 50db worse on phase noise compared to a xtal multiplier 73 Dom
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Dominique Dehays
Ge,
Hummmm df9np 2ghz measured 50db worse on phase noise compared to a xtal multiplier 73 Dom |
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