HR 10 PROBLEM

[Mark S Graalman]

  The major problem with the HR-10 is the mixer/L.O. setup,
there simply isn't enough isolation between the RF/LO input
to the mixer, they are tied to the same grid with only low value
coupling caps to offer isolation. A major improvement would be
to install a buffer stage between the L.O. and the mixer, but not
too practical. It's just a cheap beginners receiver.

Mark  WB8JKR


On Sat, 25 Dec 1999 10:03:37 -0800 Ray Friess <rayfri at INQUO.NET> writes:
>I have an HR 10 receiver which is exhibiting an interesting
>problem.  When I tweak the antenna capacitor, the receive frequency
>changes.  I dont have a full manual on the thing, but with the
>abbreviated one I got from a Heath manual source, which has basically
>the schematic and specs, I checked the wiring with the schematic and
>I dont seem to have a wiring error.
>     Anyone else ever have this problem?  Anyone with suggestions?
>
>     Ray  WA7ITZ
>
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