Hi to Geoff and to the Group,
Geoff said :
Although the Hilberling PT-8000 series of transceivers are very expensive,
this could be because they have been designed for Military and 'commercial'
use and not only for amateurs. I believe that it should be possible to
design and market a high
For a real down conversion radio, consider my old Hallicrafters
SX-99. Everything is converted to a 455KHz IF which includes a
crystal filter (I think one poll). It really doesn't do very
well on image rejection. :-)
I had a pristine HQ150 (just finished restoration) and while listening to
Out of an extremely interesting private mail, I don't have got comments on
this topic, which was much debated in the past.
I post it once again because I think the Elecraft team and Elecraft
aficionados are more apt to discuss this subject than on other reflectors
dealing with down
As with any design decision, there are always trade-offs: each option
has its pros and cons. I think an up-conversion architecture is easier
to design and potentially cheaper. And as you say, there is no hole
in the coverage around the intermediate frequency.
However I believe it is harder to
On 10/12/12 at 12:12 AM, n...@sonic.net (Alan Bloom) wrote:
Down conversion was universal before the late 1970s. Then up conversion
became the fad. Now we're back to down conversion.
I look at the K3 as a middle conversion design. With the 8.215
MHz IF; 160M, 80M and 40M are up converted and
Georges,
Although the Hilberling PT-8000 series of transceivers are very expensive,
this could be because they have been designed for Military and 'commercial'
use and not only for amateurs. I believe that it should be possible to
design and market a high performance transceiver using an
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