[Hallicrafters] Best Rx?

[Carl]

Mine is a Mark 2 and the thin sheetmetal chassis still has no strength. At 
least they added a "damp chaser in the Mark 2A which was also needed in the 
SX-101's. While it was hot on even 10M the 6CB6 RF amp is a sharp cutoff and 
it overloads badly with their AVC attempt by changing the plate voltage on 
each band. Only one other stage has AVC.

It looked good in the ads and I almost bought one but after seeing how tiny 
it was I spent the money on auto performance parts and flogged the HQ-129X 
until the Drake 2B came along after I got out of the Navy. In the mean time 
I had a product detector in the BC-453 and the SSB performance was about as 
adequate as needed then using a 10B and HB GG amp using 1625's.

Carl
KM1H



----- Original Message ----- 
From: "James Liles" <james.liles at comcast.net>
To: <hallicrafters at mailman.qth.net>
Sent: Saturday, November 27, 2010 9:10 AM
Subject: [Hallicrafters] Best Rx?


> The SX-100 Mark2 was a significant improvement over the Mark1.  The tuning 
> cap linkage was re-designed to reduce backlash and mechanical stability 
> and there were several circuit changes that enabled the radio behave and 
> sound as good as any with a product detector.  You run with the RF gain at 
> 10 in SSB mode and it's quite a bit less bothered by vibration.  There is 
> a post on the HHI reflector describing the changes.  BTW, with the 
> exception of the re-designed tuning cap the Mark1 can be converted to a 
> Mark2 in a couple of hours -- making it a good sideband receiver which I 
> believe to be as sensitive as any out there on all bands.
>
> Kindest regards Jim K9AXN
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