[Boatanchors] Hallicrafters SX-25

[Rob Atkinson]

Thanks for the post.  There was an article in ER a number of years ago
that spoke of the unfairly maligned SX25's "deafness" on 10 m. and how
to make it work up there.

73

Rob
K5UJ

On Sun, Jul 15, 2018 at 10:33 AM, McDonald, J Douglas
<jdmcdona at illinois.edu> wrote:
> I recently did an (electric only) restoration of a Hallicrafters SX-25, to cosmetically match my S-36A.
>
> In back issue of this mailing list, this set is somewhat bad-mouthed for deafness on the 15-42
> MHz Band 4. After much work, especially careful tweeking of the exact connection points of
> all the bypass caps in the RF/Osc section, in fact it works quite well there. The trick is
> getting both calibration and tracking exactly right. This was not easy. Its as sensitive as
> any top end boatanchor, and gain and image rejection are now very adequate. The
> adjustable xtal bandwidth is nice, would be nicer if the control were on the front panel.
>
> I would call this set as good as possible for a single conversion set with 455kHz IF without
> a much  much stronger probably cast aluminum chassis and a gas regulator tube.
>
> This process is documented on antiqueradios.net.
>
> Doug McDonald
>