[Hallicrafters] SX-101 MKIII

[Duane Fischer, W8DBF]

Bill, 	
	
Refer to the item on the HCI web site by WA2CWA, Peter Markavage, on the lineage
of the SX-101 It may be helpful in assisting you in being certain of which model
you now own. It can often be rather confusing. 

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From: Bill Gerhold <k2wh at optonline.net>
To: Hallicrafters at mailman.qth.net
Subject: [Hallicrafters] SX-101 MKIII
Date: Saturday, September 11, 2004 11:43 PM

I have a recent acquisition of an SX-101 MKIII receiver.  Looking at the
BAMA site,
SX-101 MKII, (a MKIII schematic doesn’t seem to be available), the first
conversion
oscillator tube is shown as a 12AU7A.  The MKIII I have here has a
12BY7A in this
position as marked on the chassis and that is what I found in the
socket.
 
My confusion is Chuck Dachis’s book indicates all the different
variations of the
SX-101 use the 12BY7A as the 1st conversion oscillator.  The only
mention of
differences between the MK1, MKII and MKIII is “Minor electrical and
cosmetic
changes” between the different versions of this receiver.
 
Apparently, the MKII tube complement is different from the MKIII at
least in this
instance.
 
Anyone have a service manual for the MKIII or anything to add to this
apparent
discrepancy.  Or am I making too much of this.
 
Bill (K2WH)
 
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