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LF: Re: LF performance FT-847

To: <[email protected]>
Subject: LF: Re: LF performance FT-847
From: "Roelof Bakker" <[email protected]>
Date: Sun, 5 Mar 2006 19:54:59 +0100
Delivered-to: [email protected]
References: <[email protected]> <001b01c64072$4060e860$02423850@MARLEEN> <003701c6407e$e4d29220$0600a8c0@router>
Reply-to: [email protected]
Sender: [email protected]
Hello Uwe,

Use a 30 - 40 dB tuneable pre-amp.
I have attached a circuit diagram.
The beauty of LF is that good selectivity can be achieved in front of the active devices, which greatly helps to reduce overload problems. At HF it is often common sense to use as little gain as possible in the front end of a receiver.

At LF I have used up to 50 dB gain without adverse effects. I found that these high gain tuneable pre-amplifiers opened the band for weak signals here.

Best regards,

Roelof Bakker, pa0rdt


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