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Gary T. Lane
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Joined: 06 Sep 2008
Posts: 155
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| Posted: Nov Sat 07, 2009 6:06 pm |
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Hi Guys, OK I'm getting a strong signal using a 60W light bulb and 3 inches of wire between the xmtr and the light bulb. I am pegging the s meter because the set is on top of the receiver, but, no beep or chirp and the bulb is at about half illumination. Then I turn on the BFO and in comes a perfect tone signal! The book says this set in not designed for single side band operations..What's happening?
Gary |
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Curt Reed
Moderator
Joined: 01 Jan 1970
Posts: 27596
Location: Sandpoint, IDAHO US of A
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| Posted: Nov Sat 07, 2009 6:51 pm |
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A CW only transmitter is a far cry from a vastly more complex SSB transmitter. What you are hearing is what is suspected to be received.
With the BFO turned on, you are hearing the audible hetrodyne from the BFO signal beating against the transmitted carrier frequency, hence the term Beat Frequency Oscillator. That is precisely how CW is copied so you hear the tones of the keying.
Curt
_________________
Curt, N7AH
(Connoisseur of the cold 807) CW forever! |
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Gary T. Lane
Member
Joined: 06 Sep 2008
Posts: 155
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| Posted: Nov Sun 08, 2009 3:03 pm |
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Thanks Curt, I learned something. But on antique radios I have heard clear code transmissions on 40&80 meters and these sets have no BFO.
Thanks for help,Gary |
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Curt Reed
Moderator
Joined: 01 Jan 1970
Posts: 27596
Location: Sandpoint, IDAHO US of A
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| Posted: Nov Sun 08, 2009 3:14 pm |
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If there was another signal within the IF passband of the receiver, that would provide the hetrodyning action to produce the beat notes.
Curt
_________________
Curt, N7AH
(Connoisseur of the cold 807) CW forever! |
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