[Hallicrafters] SX-100

[Dan Cotsirilos]

Well Charlie I  think you nailed it! this radio receives as good as most 
tube radios that I have had that have with product det! the fact that there 
are upper and lower filters and SSB printed with CW on the panel tells me 
this is not a typical non product det radio. So that clears the mystery up. 
thanks Dan
----- Original Message ----- 
From: "Charlie" <pincon at erols.com>
To: <hallicrafters at mailman.qth.net>
Sent: Wednesday, December 01, 2004 9:59 PM
Subject: Re: [Hallicrafters] SX-100


> Well, it may sound like it has a product detector, but it doesn't.
> Hallicrafters found early on that if you increase the BFO injection level, 
> a
> diode detector will function adequately for SSB demodulation.
>
> Remember the old trick of turning down the RF gain on a pre-sideband era
> radio when listening to Donald Duck?  This is essentially what you are 
> doing
> when you crank the audio all the way up and use the RF gain control to set 
> a
> comfortable listening level.  By lowering the IF signal into the diode
> detector, you are effectively raising the BFO injection resulting in 
> decent
> SSB detection.
>
> That's exactly what the SX-100 and I believe, early SX-101 radios did.
> Diode detectors only and SSB that didn't sound too bad at all.
>
> 73' Charlie k3ICH
>
> ----- Original Message ----- 
> From: "DAN COTSIRILOS" <dcsfree at worldnet.att.net>
> To: "Hallicrafters list" <hallicrafters at mailman.qth.net>
> Sent: Wednesday, 01 December 2004 7:28 PM
> Subject: [Hallicrafters] SX-100
>
>
> Do I remember reading people telling me that a SX-100 does not have a
> product detector? I just picked up one and it sure sounds like it has one 
> to
> me? It receives SBB perfectly with full RF gain. My limited understanding
> tells me that a radio that can pick up SSB with full gain has a product
> detector, no?  Dan
>
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