Re: [IRCA] carriers on 1609 and 1611 mixing for het on 1609, 1610, and 1611

["Mike Westfall, Lost Almost NM" <mwdx@xxxxxxxxxx>]

The two "carriers" on either side of the main carrier at 1610 are 
exactly what you would expect from a transmitter broadcasting a single 
test tone.  These aren't really separate carriers, but sidebands 
resulting from the test tone being modulated onto the carrier.

Remember, when you amplitude modulate a continuous wave, you get 
sidebands whose frequncies are (carrier freq + audio freq) and (carrier 
freq - audio freq).

If the only audio you are modulating onto the 1610 kHz carrier is a 1 
kHz tone, then the side bands will be continuous waves (kinda like 
carriers) at 1609 and 1611 kHz.

OK, I suppose that it's *possible* that someone is transmitting three 
separate carriers at 1609, 1610 and 1611, but it's much more likely that 
it's someone transmitting a 1 kHz test tone modulated onto 1610 kHz.

Bob Young wrote:
> That's exactly what I'm getting also, I believe this mystery tone is a het 
> from these two carriers, they are both 1khz from 1610 and give the same tone 
> on all three frequencies. I also get this same het note from 1521 Saudi 
> Arabia mixing with WWKB 1520. I believe both carriers are from the same 
> source also as they both fade at the same time and are of the same signal 
> strength. I can null out the tone on all three carriers also with the 
> phaser, it is easier on the 600 with the crystal phaser which eliminates 
> hetorodynes without phasing.
> 
> Bob Young
> Millbury, Ma
> R-390A, SP-600 2 400' LW's, Misek Phaser
> 
>>From: Milspec390@xxxxxxx
>>Reply-To: Mailing list for the International Radio Club of 
>>America<irca@xxxxxxxxxxxxxxxx>
>>To: irca@xxxxxxxxxxxxxxxx
>>Subject: Re: [IRCA] carriers on 1609 and 1611
>>Date: Wed, 29 Nov 2006 17:02:45 EST
>>
>>Bob -
>>
>>Alright,
>>
>>  So I'm not all that far gone. This is what I heard when first alerted - 
>>two
>>clearly discernible tones 1609 & 1611 on 51J-4 w/BFO & 3 KHz filter. 
>>Curious.
>>
>>
>>       =Z.=
>>
>>Dr. Zeoc ha
>>s0op va]-43h
>>dhoc-  s++20
>>
>>whulp
>>_______________________________________________
>>IRCA mailing list
>>IRCA@xxxxxxxxxxxxxxxx
>>http://montreal.kotalampi.com/mailman/listinfo/irca
>>
>>Opinions expressed in messages on this mailing list are those of the 
>>original contributors and do not necessarily reflect the opinion of the 
>>IRCA, its editors, publishing staff, or officers
>>
>>For more information: http://www.ircaonline.org
>>
>>To Post a message: irca@xxxxxxxxxxxxxxxx
>>
> 
> _________________________________________________________________
> MSN Shopping has everything on your holiday list. Get expert picks by style, 
> age, and price. Try it! 
> http://shopping.msn.com/content/shp/?ctId=8000,ptnrid=176,ptnrdata=200601&tcode=wlmtagline
> 
> _______________________________________________
> IRCA mailing list
> IRCA@xxxxxxxxxxxxxxxx
> http://montreal.kotalampi.com/mailman/listinfo/irca
> 
> Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers
> 
> For more information: http://www.ircaonline.org
> 
> To Post a message: irca@xxxxxxxxxxxxxxxx
> 
> 


-- 
Mike Westfall, N6KUY, WDX6O
Los Alamos, New Mexico (DM65uv)
"Los Alamos" is Spanish for "More than one Alamo" -- Dave Barry
Online logbooks: http://dxlogbook.gentoo.net?account=mikew
Read my blog:    http://mesamike.gentoo.net
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx