Here you go:

http://www.hf-berg.de/HFC/vorverstaerker_vox_mast.htm

Excellent products, quick shipment from Germany, good communication.

Stefan, VE4NSA

On Thu, Nov 3, 2011 at 8:18 PM, James Cutler [email protected] wrote:

All,

Does anyone have any recommendations on high quality mast-mounted preamps for UHF?  We're using the Icom AG-35 and not happy with the noise figure.  We're going to try an adjustment described here http://www.eham.net/reviews/detail/6116.

We are looking at the amps from ARR and SSB.  Any other recommendations?

http://www.ssbusa.com/gaasfet.html http://www.advancedreceiver.com/page10.html

Thanks,

--Jamie _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

Hi Jaime

I built this preamplifier as Domenico described in his article. I am using it with a great success too. My environment area is very hot also; I live into the city wish has a lot of buildings, Ham activity, broadcastings, repeaters and other stations.

Before I used it; I had the T/V channel interference on the downlink of SO-50 and AO-27. When I began to use the preamplifier the interference disappeared.

It is a great design!

73! Hector, CO6CBF

Hi Jamie

In a separate email I have sent to you an article that I write for Radio Rivista 9/1993 describing with schematic diagrams and mechanical drawings my low noise GaAsFET high dinamic range and high selectivity cavity preamplifier for 435 MHz with NF=0,43 dB and gain G = 20 dB

I am using it with great success in my environment area in the bay of Naples wich is "hot" with a lot of ham activity, local pagers and FAA stations.

By the way it require a lot of mechanical work but for best performance it must be tuned for the lowest Noise Figure using only a very simple diode noise generator that was described in the article.

Unfortunately building low noise preamplifiers and tuning instruments by yourself in novadays seems to become a RF "endangered species"

Have fun.

73" de

i8CVS Domenico

----- Original Message ----- From: "James Cutler" [email protected] To: [email protected] Sent: Friday, November 04, 2011 2:18 AM Subject: [amsat-bb] Mast-mounted preamp recommendation?

...

All,

Does anyone have any recommendations on high quality mast-mounted preamps for UHF? We're using the Icom AG-35 and not happy with the noise figure. We're going to try an adjustment described here http://www.eham.net/reviews/detail/6116.

We are looking at the amps from ARR and SSB. Any other recommendations?

http://www.ssbusa.com/gaasfet.html http://www.advancedreceiver.com/page10.html

Thanks,

--Jamie _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

---

Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

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