Path: utzoo!utgpu!CUVMA!SWL-L Date: Fri, 23 Feb 90 14:11:49 EST Reply-To: "Stephen M. Linscott" Sender: Short Wave Listener's List Comments: Resent-From: "Stephen M. Linscott" Comments: Originally-From: "Stephen M. Linscott" From: "Stephen M. Linscott" Subject: Re: Sangean 803A hints To: UofToronto LAN redistribution References: Message of Wed, Message-ID: <90Feb23.142546est.57356@ugw.utcs.utoronto.ca> Newsgroups: bitnet.swl-l Distribution: ut Approved: devnull@gpu.utcs.toronto.edu I meant to send this to the list. Loose nut on the keyboard!! :-) ----------------------------Original message---------------------------- On Wed, 21 Feb 90 05:07:35 GMT Don Liu said: >Recently I fixed several minor problems of my new Sangean receiver. >I am posting the followings in hope that some of you may use it as >reference. > >The problems are: >1) Inacuracy in the synthesized frequency >2) Audible "hiss" >3) Crossmodulation (that is, strong local stations interference > when using a good antena) > >My fixes are: (stuff deleted) >3) You may have crossmodulation if you find that a good antena would >make reception worse. reduce the RF gain will help reduce the cross >modulation, but the redustion is often not enough. There is a 68 ohm >resistor connecting the RF gain potentiometer to ground. Shorting >this resistor will increase the gain control range greatly thus >fixing this problem. (more stuff deleted) >Happy SWLing! The DX-440 already has the RF gain mod. The print shows the 68 ohm resistor as "not present", and my meter confirms that the bottom of the pot is grounded. BTW, the board layout picture has the gain and BFO pots labeled backwards! 73 - Steve -