[AMRadio] Hallicrafter S-42


Bob Peters rwpeters at swbell.net
Sat Sep 29 13:24:59 EDT 2007


I have an SX-42 and it does have crystal filters that work Ok... It has
the best fidelity of most of the halis...especially on the FM BC
band...Love the receiver 1948 vintage...Would love to find the stand it
went on...It rotates  

Bob W1PE

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of k0occ at comcast.net
Sent: Saturday, September 29, 2007 11:47 AM
To: Discussion of AM Radio in the Amateur Service; Discussion of AM
Radio in the Amateur Service
Subject: Re: [AMRadio] Hallicrafter S-42


The SX-96 does not have any crystal filters in it. It uses a 50 kc IF
for selectivity. Originally Hallicrafters used "SX-  " prfix to indicate
that the receiver had a crystal filter. They developed the 50 kc IF and
used it for the first time in the S-76. But since there was no "X", the
S-76 was not looked upon as so great since it did not have a crystal
filter; even though it's 50 kc IF was as selective as their receivers
with a crystal filter. So beginning with the SX-96, they used the "SX-
" prefix for their receivers that used the 50 kc IF scheme. Most of
their subsequent receivers used the 50 kc IF instead of crystal filters;
including SX-100, SX-101, SX-115, SX-117.  They did make a few lower end
receivers in the 60's with crystal filters that had the SX- prfix -
SX-130, SX140, SX-146. 

I don't think Hallicrafters ever made an S-42. They made an SX-42 in
mid-late 40's, which was a pretty well respected receiver in its day.
They made an S-40 in same time frame; it was marginal, one step above an
S-38, mechanically unstable and poor selectivty.

73

--
Ernie, k0occ 
Atlanta, GA

-------------- Original message -------------- 
From: "Ellen Rugowski" <ellenjoanne2003 at sbcglobal.net> 

> ----- Original Message -----
> From: "Geoff/W5OMR" 
> To: "Discussion of AM Radio in the Amateur Service" 
> 
> Sent: Saturday, September 29, 2007 9:09 AM
> Subject: Re: [AMRadio] Hallicrafter S-42 
> 
> 
> > I guess it depends on what you want the thing to do. An S-40B (the 
> > 42
> > was a no-no on my part - sorry), best I can recall, doesn't have a 
> > product detector on it. so, SSB would be out of the question. 
> > Broadcast band and some stronger shortwave stations, for SWL'ing... 
> > yeah, I'd say it's cool for a table-top, or bed-side receiver, but
I'm 
> > not sure I'd use one for communications. 
> > 
> > *I THINK* that the Hallicrafter S line pre-dates the SX line (to the
> > best of my recollection) meaning that the S-40B has seniority on the

> SX-28.
> > 
> > OR...
> > 
> > it could be that the X in SX means it's 'x-tra' good. ;-)
> > 
> > I'm not familiar with the lineage of Hallicrafter receivers. Never
> > really cared, to tell the truth. I always left that up to the 
> > collectors. All I want is something that works. Period. 
> > 
> 
> In the beginning, the S-line was before the SX line, but when the SX 
> line
> came out, the S line was also made concurrently. In Hallicrafters 
> nomenclature, the X in SX,means that the unit has crystal filters in
it. 
> For instance, I have an SX-96. It has crystal IF filters for
bandwidths 
> from 5 kc, down to 500 cycles. The S-85 for instance, has none of
these 
> filters, and is intended more for General Coverage use. Externally
both the 
> SX-96, and the S-85 receivers are similar. 
> 
> 73,
> Ellen - AF9J 
> 
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