[Hallicrafters] SX-100 and the SX-101CMKIIIA

[George KB2Z]

It began as a designator for the xtal filter. I would venture to say it 
became a marketing scheme to represent higher quality, our best, expect to 
pay more, etc. Name and series recognition. All manufacturers do it. Cars, 
boats, appliances. and electronics.

The following was lifted from LA5KI
"The first "SX" series radio, the SX-4, was built in 1934 as an option to 
the S-4 "Super Skyrider" . The difference between the two was the addition 
of the crystal filter in the "SX" prefix. The "SX" prefix from that point 
on meant that the radio had switchable selectivity position(s)."

It looks like in later years it was  switchable selectivity position(s) 
that made it an SX.

Happy Hammin, George KB2Z







At 06:59 AM 11/21/04 -0500, you wrote:

>The "X" designation in all early Hallicrafters receivers always denoted a
>model with a crystal filter to differentiate it from that same model 
>without the
>crystal filter. Later Hallicrafters receivers featured dual conversion,
>passband narrowing and or filters that did not have a crystal as engineering
>refinements were adopted and circuits were better designed. Is it possible
>Hallicrafters included the "X" in the model prefix of later models without 
>a crystal
>filter to denote receivers having crystal controlled 2nd conversion 
>oscillators?
>
>Regards,
>Greg Gore; WA1KBQ
>Charlotte, NC
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