Re: [HCDX] HF Preamps~ Do I Need One?

[Richard Jary <jary@xxxxxxxxx>]

T&M Ritola wrote:

> Sorry Bill, but I have to believe my ears. When there is a very weak signal
> at dawn or dusk hours (which I find to be the most interesting times) on
> medium wave, using a good preamp helps in many cases. My receiver is not
> broken or of a bad quality (AOR AR7030+). The signal maybe unreadable no
> matter how much volume is turned on, but when a good preamp is switched on
> it may become readable. This happens both with K9AY and long-wires of 400
> metres. If it wouldn't happen, I wouldn't use a preamp. I don't care about
> the theory, I just listen.

I have the plain AR7030 with an extra 3.8 kHz filter added. In a quiet location
I can switch the antenna input to the centre position, designed for a whip
rather than anything with serious gain. This brings up the signal quite well in
some cases. I assume this is acting like some sort of preamp, apart from the one
you can set as the normal inbuilt preamp.

I am using a T2FD cut for a low of about 4 MHz at home, occasionally this
feature is useful here if local noise isn't too bad. In the bush it can
certainly be of help.

Richard




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