[Boatanchors] Using SX-111 for AM Reception: Comments ?

[Singley, Rodger]

To clear up some misconceptions about the Hallicrafters SX-96/100/101 family of receivers they are designed to provide selectable sideband reception of AM signals so when properly tuned the carrier is placed at one edge of the passband and in the 5 Khz. selectivity position they provide the equivalent of a 10 Khz. bandwidth in a conventional receiver.  If NOT properly tuned and the carrier is placed in the center of the passband then they do only have audio response out to around 2.5 Khz. at the 6 db down point in the 5 Khz. position.

All of this is covered in the manual and the suggested method is to tune the receiver for zero beat with the BFO on and pitch set to zero.  Then turn the BFO off and select either sideband and in the 5 Khz. position the nominal bandwidth is out to 5 Khz. above or below the carrier at the 6 db down point (depending upon sideband selected).  Of course under tough conditions you can reduce the bandwidth.  This tuning process and result is also true for the Heathkit RX-1 and Hammarlund HQ170/180 receivers (and the related HC-10 sideband adapter).  

Rodger WQ9E


-----Original Message-----
From: boatanchors-bounces at mailman.qth.net on behalf of Richard W. Solomon
Sent: Wed 10/21/2009 8:13 PM
To: boatanchors at mailman.qth.net
Subject: [Boatanchors] Using SX-111 for AM Reception: Comments ?
 
I have an SX-111 and wonder what folks thought about using it
for 80 Meter AM work. I know I could get a better receiver, 
but this one's sitting on the shelf.

Thanks for your input,

73, Dick, W1KSZ
______________________________________________________________
Boatanchors mailing list
Home: http://mailman.qth.net/mailman/listinfo/boatanchors
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Boatanchors at mailman.qth.net

List Administrator: Duane Fischer, W8DBF
** For Assistance: dfischer at usol.com ** 


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html