[Hallicrafters] SX-25

[Carl]

Since the SX-25 is pretty much a repackaged SX-17 I can understand the 
earliest having both RF amps in use which was soon seen unecessary from an 
operating viewpoint. Having one less contact on a wafer that remains on the 
shaft isnt saving money except maybe to the most anal beancounter. Halli 
continued that same switching arrangement thru into the 60's.

Carl
KM1H



----- Original Message ----- 
From: "Mike Everette" <radiocompass at yahoo.com>
To: <hallicrafters at mailman.qth.net>; "jsloss" <k7mks at comcast.net>
Sent: Monday, August 24, 2009 11:28 PM
Subject: Re: [Hallicrafters] SX-25




--- On Mon, 8/24/09, jsloss <k7mks at comcast.net> wrote:


> I'm beginning to think Hallicrafters started
> out with one design and then changed it without correcting
> the manual. The SX-25 was designed to use just one RF
> stage on the BC band.
>
> Thoughts appreciated.

I've never seen an SX-25 with the 4-coil arrangement in the radio, on Band 
One.  I have seen several SX-25's, including early/middle/late.

My best SWAG-method approximation:  They may have designed the radio, 
initially, to use 2 RF stages on Band 1, e.g. 4 coils; but the bean counters 
found a way to make it cheaper... hmm.  And, as for the manual.... perhaps 
some of those Halli tech writers later went to work for Aerotron, whose 
two-way comm gear manuals often contained errors that went uncorrected for 
years (if ever!).

73

Mike
WA4DLF



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