[TowerTalk] Adjacent BC AM sigs DE K0FF

[Michael Tope]

I thought a Q-multiplier was an active stage - wouldn't it be susceptible
to IMD just like the front-end you are trying to cure? 

As I recall the Drake R4C had a pretty narrow passive preselector - 
but it was still something like 20 to 30 KHz wide (-6dB?? points) on 
160 meters - not enough for BC adjacent channel rejection. 

Mike, W4EF.........

----- Original Message ----- 
From: <K3BU@aol.com>
To: <towertalk@contesting.com>
Sent: Monday, May 08, 2000 7:54 AM
Subject: Re: [TowerTalk] Adjacent BC AM sigs DE K0FF


> 
> In a message dated 5/8/2000 10:44:48 Eastern Daylight Time, 
> w8ji@contesting.com writes:
> 
> > 
> >  I'd like to know how to get enough selectivity in a preselector to 
> >  reduce adjacent channel interference on the AM BC band! That 
> >  would require some very high Q components.
> >  
> 
> Good old Q-multiplier!
> 
> Yuri, K3BU, VE3BMV
> 
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