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"Dave" ) writes:
Hmmm. Others have suggested I was overloading it, but I don't *think* that is the case. It's just hard to dig weak signals out of the hash and trash surrounding them (like Voice of Korea's broadcast to Central and South America.) I am planning on building a preselector anyway, and will post updates on the effects of that addition. Dave But if it's really just adjacent signals, and I doubt it, nothing done at the antenna will fix the problem, unless you go to a directional antenna so you can null out the unwanted signals. You can't get enough selectivity at shortwave frequencies with coil and capacitor filters to knock out stations adjacent in frequency to what you want to hear. Well, a crystal filter at the signal frequency would work, but that gets complicated, and it's only good for one frequency. That's the whole point of the superhet receiver, to convert to a fixed frequency where a good filter can be built. Michael "RHF" wrote in message om... DAVE, Here is the RadioIntel 'review' of the Sangean ATS-505 by Russ [K3PI] http://www.radiointel.com/review-ats505.htm Two points made by the reviewer we * "An external antenna jack is provided, but it only works for SW (not AM/MW)." * "This receiver is quite sensitive on SW and I found that using an external antenna overloaded it." iane ~ RHF . . = = = "Dave" wrote in message = = = ... - - - - - S N I P - - - - - Sorry, forgot to include that information. I am using a DX-402 (aka Sangean ATS-505). I honestly wondered about that, but hesitated to shorten the wire because I would (obvioiusly) lose some sensitivity, and really like being able to pick up VOK's English broadcasts to Central America. Only problem is the noise that makes it difficult to single out. Thanks, Dave |
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