What we need is a list ranking transmitter IMD. Perhaps even a worst
polluters list.
In the over five decades since the Collins 32S-3 transmitter was
introduced, not one manufacturer has bettered it. Most transmitters are
significantly worse.
Would one dB per decade be too tough? Before the Collins is six decades
old, who will build a transmitter with IMD specs six dB better?
73, Darrell VA7TO
Darrell Bellerive
On 07/01/2013 08:34 AM, Rick - DJ0IP / NJ0IP wrote:
Well if we are pointing out Rob Sherwood points, let's not forget that ONE BIG
POINT he makes is, there is no further need to continue work on the receiver
technology now, until we fix the dirty transmitters on the band.
Why is it nobody ever wants to talk about this? Everyone talks receiver,
receivers, receivers....
A good receiver is one that does not crunch in the presence of a strong station
on a neighboring channel.
But if that station is a strong signal using many of today's rigs, driving an
amp, he's not just on the neighboring channel.
He's splattering across your frequency and there are no receiver features for
removing that.
73
Rick, DJ0IP
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