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The performance of a modern rx with a good
infinitely-variable DSP filter at very narrow bandwidths is better than older
rxs because they don't ring at the edges as xtal-based filters do. I had
an Icom 756 PRO3 that was very good in this respect and now an Icom 7800 that is
really excellent - at 10 Hz bandwidth it still works - no xtal
filter will do that. A good test if you haven't got a good SG is to tune to
Loran then look at the i.f. on a scope and see where the pulse tails go
to.
Walter G3JKV.
---- Original Message -----
Sent: Tuesday, May 31, 2005 10:04
AM
Subject: Re: LF: RE: RA1792
========================================
Message date : May 30 2005,
03:11 PM
From : "Alberto di Bene"
To : [email protected]
Copy
to :
Subject : LF: RE: RA1792
Marco Bruno wrote:
> I would
add: quite easy to maintain, no custom ICs, only a few
> outdated
parts
> but still available on the market. The synthesizer is
remarkably
> performant, and
> the 3rd order IMD is in the
102-103 dB range.
> [...]
Marco, Jim, Tracey, Laurie, Alan and
Dave (am I forgetting somebody?)
thanks for your opinions about that
Rx. The latest messages seems to
correct somehow the not so bright
impression that initially had formed
in my mind, so I will have to
reconsider my decision. Next week I will
have (probably) the chance to
examine more carefully that radio. Apart
from checking the LCDs and the
keypad for deterioration, what else would
you suggest me to check? Which
are the IF filters that I must expect it
to have installed ? Any other
weak points to watch ?
And now the one-million-dollar question...
given that my intended usage
for that radio would be mainly the reception
of digital (or
pseudo-digital) signals across the various bands, from LF
to 30 MHz, if
you had to choose between the RA1792 and the Icom R75 (for
2/3 of the
price), which one would be your choice ? I am not interested
in
reception of broadcast stations or CW/SSB signals (for this I have a
JRC
NRD-525), but, as said, narrow band (from a few Hz to 3 kHz)
digital
signals only.
Thanks again guys,
73 Alberto
I2PHD
There is no doubt that I would chose the RA1792, I Have
done all my digital work with it and would miss it greatly, and at that
price ! go for it.
Laurie.
Whatever you Wanadoo
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