Xref: utzoo rec.radio.shortwave:5069 sci.electronics:17075
Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!vsi1!zorch!ditka!zygot!duncan
From: duncan@zygot.ati.com (James R. Duncan)
Newsgroups: rec.radio.shortwave,sci.electronics
Subject: Re: Digital frequency display for analog tuner possible?
Message-ID: <29677@zygot.ati.com>
Date: 19 Jan 91 23:02:36 GMT
References: <1991Jan19.012221.2484@Solbourne.COM>
Reply-To: duncan@zygot.ati.com (James R. Duncan)
Distribution: usa
Organization: Green Hills and Cows
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In article <1991Jan19.012221.2484@Solbourne.COM> kucharsk@Solbourne.COM (William Kucharski) writes:
>He's recently inherited a Heathkit shortwave radio which works well for him but
>it's got the old "slide-rule" type tuning.  He wants to know if there's any
>way you can build any type of quasi-accurate digital frequency display for
>the tuner, based on the frequency being received.
>

I have an old Hallicrafters S-76 which I converted to 100% solid state
(including synchronous detection!).  What I did on this fun little toy
was add a simple FET buffer stage to the first LO and then plug in a
counter.  Being more of an RF person than a digital person, I ran out
of gas before creating some sort of method to subtract the 1,650 khz IF
frequency from the counter reading.  Nevertheless, this counter, which
I unplug and use for other things when necessary, works fine as a dial
frequency indicator (except for the constant +1650 kHz readout!).


-- 
            w  ["]                           | WA6MBV     
            |___|_____..duncan@zygot.ati.com | Jim Duncan  
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