Rick,
That's very unfair of you to accuse the 6500 of being a broad band noise
generator. I am an avid DX'er and seacrh for signals right at the noise
level. My 6500 hears ever bit as well as my Omni VII, Eagle, Argo VI,
TS2000, 746Pro, Jupiter, Orion, and K3.
The Flex 5000 and others like it were direct conversion receivers. The
6500 is an entirely new animal. It takes 0 to 77 mhz at the front end
and converts the entire band width to digital data. There are band pass
filters for each ham band that can be used or not used. Because the clip
point is so high at S9+80 db, the band pass filters are rarely needed.
The results with this radio are truly astonishing.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com
On 4/9/2014 1:50 AM, Rick - DJ0IP / NJ0IP wrote:
One last addition to the list, but then I must get on with my day job.
But before I add a point, I want to confirm what someone else said earlier
and thank him for saying it.
(sorry, forgot who posted it)
CLEAN TRANSMITTER
IMD and wideband noise are indeed very important. ESPECIALLY the wide band
noise if you want to work multi-multi.
In another thread the Merits of the Flex 6500's RX were highlighted, but I
know many similar radios have turned out to be broadband noise generators.
I think the 6500 is too but I DO NO KNOW FOR SURE. IMO, again it is the
missing crystal filter that is part of the problem.
Now my NEW POINT:
Please improve the IP2 of the O3.
I don't recall the IP2 of the O2 but in the O1 and most other Ten-Tec
transceivers, the IP2 was relatively low (about 65dB).
Most of the focus for the past 30 years has been on IP3 - which is indeed
more important, but here in Europe, a weak IP2 also has significant
problems. Specifically, when operating on 20m with a multiband antenna that
is high and in the clear, at night you can hear a carrier on 20m, every 10
kHz. These are shortwave broadcast stations breaking though INSIDE the
receiver, it's not their harmonics. Monoband antennas help reduce this
effect.
THE TEN-TECS WERE WORSE THAN THE (SAME CLASS) JA RADIOS IN THIS RESPECT.
BTW, Stuff like an Icom 706 were utter CRAP in this respect.
At night in my RV, even on the mobile antenna the carriers were between 55
and 57 every 10 kHz. I had to insert a preselector or Dunestar BPF to
eliminate it and be able to work 20m.
PLEASE IMPROVE IP2.
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|