Sounds like you got it right, Ray. I have a slightly different view. I
find the stock subRX to be fine for DXing because I use the MainRX to listen
to the DX. After all, he's the one getting clobbered by the cops,
tuner-uppers, QRMers, etc. The SubRX is great for finding who's calling him
and where the pileup is. Any more, it seems the worst place to call is on
top of the last worked station because you and 20 others are in that same
spot. The SubRX is great for lining up the Transmit VFO in the pileup, I
find.
For what it's worth - we all do it our own way!
73, Duane
Duane Calvin, AC5AA
Austin, Texas
www.ac5aa.com
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of
Rsoifer@aol.com
Sent: Monday, May 20, 2013 2:08 PM
To: tentec@contesting.com
Subject: Re: [TenTec] RX366
Hi all,
Since I started this thread a few days ago, let me try to summarize where
we are.
John Henry says that the RX366 is essentially the Eagle receiver, while the
stock Orion/Orion II sub rx is essentially the Jupiter receiver. Rob
Sherwood's tests show that the Eagle receiver is almost as good as the Orion
II main rx, inside the ham bands. I can't find where, or if, Rob ever
tested the Jupiter but you can go to the TT web site and download the
specs.
Barry tested the two sub receivers and found that the RX366 was much better
inside the ham bands but the stock unit was much better in the 9 MHz SWL
band as well as in the AM BCB.
Do you need the RX366? If you are a serious contester, or if you have an
active ham next door, then probably yes. If not, then the stock unit is
probably good enough, especially if you do any listening outside the ham
bands.
Did I get it right?
73 Ray W2RS
In a message dated 5/20/2013 2:22:57 P.M. GMT Standard Time, Rick@DJ0IP.de
writes:
John, there were two threads going on under the same subject.
I was not responding to the AM Broadcast issue, but rather to the question
how big the difference is between the old 2nd RX and the new 2nd RX on the
Ham Band performance.
There the upwards vs. downwards conversion makes a significant difference.
73
Rick, DJ0IP
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of John Henry
Sent: Monday, May 20, 2013 2:38 PM
To: Discussion of Ten-Tec Equipment
Subject: [TenTec] RX366
Actually, a lot of this is misunderstood.
The RX366 related to how good or bad it receives AM Broadcast has nothing
to
do with upconversion or downconversion.
The reason the RX366 doesn't provide AM Broadcast reception as good as the
ham bands is due to a broadcast band filter before the roofing filters.
This is to ensure that the umpteen hundred gigawatt station 2 miles down
the
road does not get into the receiver path. You can measure differences in
ham
bands when the local AM station is at full power in a rig that doesn't have
a broadcast band filter. The original sub receiver in the
565/566 was actually the Jupiter receiver, and it did not have a broadcast
band filter in line.
What we did fail to realize though when designing the Eagle and it's
subsequent reuse as the RX366, is that hams would want to use their Eagle
as
a high quality AM broadcast band receiver in the ham shack.
Me, personally, I'd go down to radio shack and pick up a $12.00
AM/FM/Weather/etc radio for this, and get the RX366 to get the best 2nd rx
for ham operations.
.... Just my two cents.
For future rigs, we will consider the impact of having a separate path in
the preselector for AM Broadcast and treat it as a band of it's own. But
that is up to discussion/design/prototyping in house.
Thanks, and 73,
John Henry, KI4JPL
TEN-TEC Engineering
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