[TenTec] TECHNICAL: Wish List for ORION-III

[Carl Moreschi]

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)
>
>
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