[TenTec] Re: QRNN Canceler

[Paul Plasters]

AH now we get to the good part of the old radios that were 2 pieces.  You
had to have a TR switch, and you could have placed this device in only the
receive line!  Technology! Ain't it wonderful?
73 Paul
At 11:18 PM 5/2/99 +0100, patents@dx0man.prestel.co.uk wrote:
>
>According to their manuals, the MFJ and JPS cancellers use the
>unwanted noise signal from the main transmitting antenna. They nuke it
>with an out-of-phase noise signal, from an auxiliary noise antenna.
>BUT in each case, the canceller's output is ALSO its input, on
>transmit.
>
>If you never transmit, there is no problem, of course, but most of us
>do transmit. Hence the relay problem.
>
>If I had room for completely separate, widely spaced transmit and
>receive antennas, I'd not have neighbours, (and I would be able to
>afford not to have power line noise either). I'm sure that if it was
>so easy to completely avoid switching the canceller out of line then
>they would already have done it. 
>
>Some modern Q signals --- ??
>QRM means there is a station on my frequency
>QRMM means there are two stations on my frequency
>QRN means its noisy 
>QRNN means its very noisy indeed
>QRNNN means I can't hear a thing because of the noise
>5NN QRNNN means I can't really hear you because its too noisy, but
>I do need your QSL card.
>
>73 John G3JAG
>On 02-May-99 Roy Koeppe wrote:
>> 
>> Mike et al,
>> 
>> Yes, you said the magic:
>> 
>> "It should not be too much of a major job to access the Rx side of
>> the
>> rig's tx/rx changeover and insert the QRM/QRNN phasing unit at that
>> spot
>> in the circuit, just a thought !!"
>> 
>> This is the prescription for silent, QSK, QRO noise canceling. Just
>> bring
>> out a spare phono jack connected to your  xceiver's "receive side"
>> of its
>> T/R relay. The canceler's output goes there, and the canceler's
>> relays are
>> not ever operated at all.
>> 
>> TNX, 73,    Roy     K6XK
>> 
>> 
>> 
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>----------------------------------
>E-Mail: patents@dx0man.prestel.co.uk
>Date: 02-May-99
>Time: 19:43:06
>
>COPYRIGHT means don't copy .....
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