[Premium-Rx] Ten-Tec RX-340 - Amateur Use

[Carcia, Francis A HS]

        I find this quite interesting. I think a prepost filter ahead of the
new SDR hardware will be required. The tuned RF stage
    in the R390A does a good job of stripping out wide band crud. Multiple
Roofing filters is an option no receivers have yet
    have a big effect on performance. I still think the SDR needs a stage of
conversion to an IF with multiple roofing filters
ahead of the bit bashing. fc

-----Original Message-----
From: Walter (Volodya) Salmaniw [mailto:salmaniw at shaw.ca]
Sent: Monday, February 07, 2005 11:21 PM
To: Williams, Barry
Cc: premium-rx at ml.skirrow.org
Subject: Re: [Premium-Rx] Ten-Tec RX-340 - Amateur Use


At 07:20 AM 2/7/2005, you wrote:



Before I went any further I wanted to check and see if any of the RX-340
owners had tried the receiver on the ham bands, particularly in a CW pileup.
It would also be interesting to see if anyone has used the RX-340 to listen
to a weak AM signal within 10 kHz of a very strong signal.  I did some
listening tests with my HF-2050 and it appears to work pretty well, even in
a pileup on 7010.  On the other hand, the filters in the HF-2050 are not
very sharp as compared to modern DSP filters.


Hi, Barry.  I have a Ten Tec 340, as well as a HF-2050, an Icom 756ProII,  a
R390A with a SE-3, and a AOR 7030+ which are often on at the same time, so
A-B-C-D-E testing is possible.  Of all these receivers, (and this is only my
opinion), the Ten Tec performs the worst on MW with a strong adjacent
signal.  The MW dxers out there are well aware of this fact and have gone to
some trouble installing roofing filters to correct the poor performance.
For the longest time, I A-B'd the 2050 and the 340 and virtually in every
instance, the 25 year old 2050 out gunned the 340 by a long shot.  I was all
set to sell the 340, but it's performance on HF is really very good, and
with ERGO4 computer control, it's a very nice set up.  The 7030+ is an
excellent performer in close, as is the 756, and of course nothing seems to
bother the old Collins R390A.  I know several of my MW colleagues have added
the roofing filter on the 340 which improves the performance markedly, and
they seem very pleased, but at the price of losing the wide audio bandwidths
available in the 340..........Walt. 

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