[Hallicrafters] SX-73 VS: SP-600-JX Comparision question

[Jack Schrader]

Hi Richard... I have an sx-73 but have not used it very much. One thing that 
I do not like is that there is no band spread. If I had the various crystals 
it would be much easier.

Mine was in operating condition, thanks John, when I got it so I've not done 
any repair work except tightening one of the contacts on the turret.

73

Jack


--------------------------------------------------
From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
Sent: Wednesday, November 03, 2010 4:14 PM
To: <Hallicrafters at mailman.qth.net>
Subject: [Hallicrafters] SX-73 VS: SP-600-JX Comparision question

>      I have long been curious about the relative
> performance of the SX-73 and SP-600-JX. The SX-73 was
> obviously built to meet the same military spec and bears the
> same military type number. It is not a clone but a unique
> design. I have seen very few and never actually used one. It
> has some features that look interesting such as regulated
> filament voltage for the oscillator. I've found that the
> SP-600-JX drifts with line voltage changes due to
> sensitivity of the filaments to the variation. It also
> appears to have a less delicate turret mechanism. I am
> curious to hear from those who actually have these receivers
> and can tell about their performance and how difficult or
> easy they are to work on. One merit of the Hammarlund RX is
> that its relatively easy to repair despite the complexity of
> some parts.
>     Also, does anyone have any idea of how many SX-73s were
> built and over what time period.
>
>
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> dickburk at ix.netcom.com
>
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