In plain English Paul, it overloads MUCH too easily.
To prevent that, you have to use a lot of attenuation; here in Europe even
more than the radio has built in.
Then it does not overload but you can no longer hear the really weak
stations.
In most day to day operation, this is not a problem.
In contests it is. In its present state, it is not a serious contest radio.
Icom has replied to this point in writing that it is an entry level radio,
not a high end radio.
On the bright side, contrary to many of the other Japanese radios shipping
today (i.e. 7600 and ALL Yasues), it has a clean transmitter.
Icom could fix this radio and potentially make it a great entry level radio
but they will probably leave it like that so that users wanting more must
pay more for the next higher radio. "That" was indeed my opinion; the bit
on performance is fact.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of
kd3jf.paulgates@gmail.com
Sent: Monday, August 15, 2016 7:47 PM
To: k9yc@arrl.net; Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] OT: 7300 buy back program
Exactly in plain English what is wrong with the 7300 Paul kw4bd Sent from my
iPhone
On Aug 15, 2016, at 12:11 PM, Jim Brown <k9yc@audiosystemsgroup.com>
wrote:
Barry,
I don't disagree that all mfrs are looking at direct sampling RX, and I
agree that they should be. I'd call that wise investment in R&D. My
assessment of the 7300 is that it's a budget level product that was
oversold.
The fundamental issue right now with that technology is dynamic range with
the available chips, which are in the right price range because of the
volume built for them by cell phones. Guys are making Flex 6700s work in
contest superstations because the serious bandpass filtering they would need
with any radio acts as an RX preselector, limiting the bandwidth of the
spectrum that can overload the A/D. But that won't help in EU or AS, where
broadcasters are in the passband of any practical filter on 40M, and there
are some high power broadcasters close enough to 20M to make it a problem
there too.
I think you've been happy with your ANAN in that regard. Are you doing
anything special to address the dynamic range issue?
73, Jim K9YC
On Mon,8/15/2016 5:22 AM, Barry N1EU wrote:
I think dealers and manufacturers have stock piles of ALL superhets,
not just the 7600. I think Rick is on the mark that the DEALER is
simply motivated to move excess 7600 inventory.
What Rick didn't mention is that there's a fresh rumor making the
rounds that Icom is about to announce a direct sampling SDR
replacement for the 7600. That's extra motivation to move 7600
inventory.
The 7300 has changed the game, period. Icom is sitting pretty.
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