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Old March 28th 08, 11:04 AM posted to rec.radio.shortwave
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First recorded activity by RadioBanter: Jun 2006
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Default 900 kHz Image Problem with the Longwave Bands even on a GrundigG5 receiver

On Mar 27, 6:26*am, dave wrote:
Radioguy wrote:
On Mar 26, 1:56 pm, gccradioscience wrote:
If you live in a city area or some rural area with a real strong AM
station its likely it will be found on the longwave bands from 150 to
519 kHz * (1050 kHz to 1419 kHz) *the 900 kHz carrier image. * Please
understand that this station is not a real longwave radio station.
Its a image from the broadcast station when the station is strong
enough to bleed on other longwave frequencies. * The radios that I
have is the DX-380, DX-390, DX-392 and the yes the new Grundig G5.
It has do something with the dual conversion circuitry . * * * I am
hoping that manufactuers, hobbyists, and technicians will use the 900
kHz formula to see other image stations to show that these AM stations
should not be on the LW bands.


Desired AM Station (kHz) - 900 kHz = Image Station


The images I am getting here locally in Virginia Beach, VA on LW is


150 kHz = 1050 kHz *WVXX -AM
210 kHz = 1110 kHz *WYRM-AM
330 kHz = 1230 kHz *WJOI -AM
410 kHz = 1310 kHz *WGH-AM
450 kHz = 1350 kHz *WGPL -AM
500 kHz = 1400 kHz *WPCE-AM


AM Band Images that are annoying


550 kHz = 1450 kHz
650 kHz = 1550 kHz


Adam E.


You are seeing a problem that is common to many inexpensive radios.
If you tune down 900khz from a strong nighttime station on the 6mhz
band you will hear image signals too. The solution is to pay more for
a better designed radio.

-
- Or build a preselector for $20
-

GCCRS,

Or simply Buy a Ready-Made one and use it with a
35~60 Foot long Random Wire {Longwire} Antenna

MFJ-956 : Long Wave, AM/BCB Medium Wave and
Shortwave Bands Pre-Selector : 150 kHz ~ 30 MHz
http://www.universal-radio.com/catal...amps/2964.html
http://www.universal-radio.com/catal...s/2964band.jpg

idtars ~ RHF