[Elecraft] Question Regarding Direct Conversion Receiver

[wa5pok]

Hi Bernie,
I have built two DC receivers (one being the Neophyte that was in QST years 
ago) and several regens (including one in Sept 2000 QST) over the years. The 
tuning has been stable in all and I securely attach the tuning capacitor's 
body that hold the rotor plates to the chassis.

Hope this helps.

73, Mike WA5POK

--------------------------------------------------
From: "Bernie KF0QS" <hamdan at ix.netcom.com>
Sent: Wednesday, January 23, 2013 12:25 AM
To: <elecraft at mailman.qth.net>
Subject: [Elecraft] Question Regarding Direct Conversion Receiver

> Dear Folks:
>
> I have now built a K1 (#1024) and a K2 (#6922) and have deeply enjoyed 
> doing
> both.  I am now currently building the SSB option for the K2.  They are 
> both
> great rigs, and building them and getting them to work has been some of 
> the
> best stuff I've done in my ham radio career.  I've worked hundreds of
> stations with them both, and a fair amount of DX.
>
> Certainly, my confidence in doing my own work has grown by leaps and 
> bounds
> because of the experience I've gained.  I've even built one thing from
> scratch, just using a schematic (a relatively simple circuit, but it 
> worked
> perfectly the first time).
>
> I now have a question about something I did years ago.  When I got the K1, 
> I
> decided to build something smaller first in order to practice soldering. 
> I
> built a Vectronics (actually, from MFJ) direct conversion receiver for 20
> meters (I also built the companion transmitter, and it works fine).  The
> problem is that merely touching the receiver makes its change frequency, 
> and
> tuning it is an uncertain process.  As a result, it is unstable, and not
> much fun to operate (though it is reasonably sensitive despite its
> simplicity).  There must be some capacitance that it is getting from my
> touch, that is adversely affecting its performance.
>
> Did I do something wrong in building this receiver, or is it just the 
> price
> of a really bare bones design?
>
> Thanks for any advice anyone can give me.
>
> 73 de Bernie KF0QS
>
>
>
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