HR 10 PROBLEM

[Bradley S. Stone]

Ray:
    I have a copy of a July 1967 73 article on modifying the HR-10.  The
author recommended the following:

    1 For increased sensitivity: replace the 6BZ6 RF Amp with a 6AK5 (after
removing the 120K screen-gid resistor and lifting pin 7 from its ground.)
    2. For SSB and CW stability: replace the 6X4 rectifier with diodes, and
use the 6X4 socket for an OA2 or OB2 regulator.  This should help with your
receive pulling off frequency when peaking the antenna trimmer, or when the
RFgain is near maximum and you encounter a strong SSB or CQ signal.

    The author also recommended an improved S-Meter and related circuitry.
    I'd be happy to copy this article for anyone who needs it!
Merry Christmas to all!
-Brad, NB9M

-----Original Message-----
From: Ray Friess <rayfri at inquo.net>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Saturday, December 25, 1999 12:20 PM
Subject: HR 10 PROBLEM


>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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