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10+GHz+preamp+at+8.4...


28-10-2012 10:30 PM
1


f1chf.free.fr/F5DQK/Eaton%20MT7552B%20extension%20part%203.pdf shows
some tests of a NF extender on a DB6NT 10 GHz preamp. NF at 8 GHz is .1
dB higher than at 10, gain is down to only 24 dB instead of 29. Looks
like it would do just fine for 8.4 with no mods.

73, Jerry, K0CQ
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29-10-2012 05:55 PM
2


Don't use this link ..
it is a temporary backup ..
Original and up to date is there
http://www.ham-hyper.com/index.php?option=com_content&view=article&id=79:analyse-gain-bruit-par-f5dqk&catid=43:mesure--instrumentation&Itemid=78

good luck
Francois F1CHF

----- Original Message -----
From: "Dr. Gerald N. Johnson" <>
To: "Microwave list" <>
Sent: Sunday, October 28, 2012 11:30 PM
Subject: [Mw] 10 GHz preamp at 8.4 GHz.


> f1chf.free.fr/F5DQK/Eaton%20MT7552B%20extension%20part%203.pdf shows some
> tests of a NF extender on a DB6NT 10 GHz preamp. NF at 8 GHz is .1 dB
> higher than at 10, gain is down to only 24 dB instead of 29. Looks like it
> would do just fine for 8.4 with no mods.
>
> 73, Jerry, K0CQ
> _______________________________________________
> Microwave mailing list
>
> http://lists.valinet.com/cgi-bin/mailman/listinfo/microwave

_______________________________________________
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30-10-2012 05:56 AM
3



Hello,

This preamp has been tested at 8.4GHz...is there anyone that has a DEM 10GHz 2 stage preamp by W5LUA that has a noise figure meter that could test this preamp stock built at 8.4GHz. I would buy one outright if I knew it was decent at that frequency.


Loren WA7SKT

Today's technology is responsible for creating a multitude of brain dead people!

Member: ARRL and Pacific Northwest VHF Society
Member: Hearsat Satellite Monitoring Group ....www.uhf-satcom.com
Location: CN86bx









> Date: Sun, 28 Oct 2012 16:30:37 -0600
> From:
> To:
> Subject: [Mw] 10 GHz preamp at 8.4 GHz.
>
> f1chf.free.fr/F5DQK/Eaton%20MT7552B%20extension%20part%203.pdf shows
> some tests of a NF extender on a DB6NT 10 GHz preamp. NF at 8 GHz is .1
> dB higher than at 10, gain is down to only 24 dB instead of 29. Looks
> like it would do just fine for 8.4 with no mods.
>
> 73, Jerry, K0CQ
> _______________________________________________
> Microwave mailing list
>
> http://lists.valinet.com/cgi-bin/mailman/listinfo/microwave

_______________________________________________
Microwave mailing list

http://lists.valinet.com/cgi-bin/mailman/listinfo/microwave
)



30-10-2012 02:26 PM
4


The only items in the circuit causing any selectivity are the quarter
wave RF chokes and they are broad, and the inherent series resonances of
the coupling capacitors. The resonant triangular bypasses have great
bandwidth or the amp would oscillate.

73, Jerry, K0CQ

On 10/29/2012 11:56 PM, Loren Moline WA7SKT wrote:
>
> Hello,
>
> This preamp has been tested at 8.4GHz...is there anyone that has a DEM 10GHz 2 stage preamp by W5LUA that has a noise figure meter that could test this preamp stock built at 8.4GHz. I would buy one outright if I knew it was decent at that frequency.
>
>
> Loren WA7SKT
>
> Today's technology is responsible for creating a multitude of brain dead people!
>
> Member: ARRL and Pacific Northwest VHF Society
> Member: Hearsat Satellite Monitoring Group ....www.uhf-satcom.com
> Location: CN86bx
>
>
>
>
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