[TenTec] TECHNICAL: Wish List for ORION-III

Wed Apr 9 16:01:33 EDT 2014

I'm pretty sure that if I had the time to go through the hundreds of emails
Rob has sent me, I would find the one talking about this broadband noise.
He listed a few transceivers which surprised me.  I believe the 6500 was on
the list.  For sure another very expensive (European) SDR transceiver was on
that list.

For now I will just say I retract everything I said at all about the 6500,
AND Carl, you can find out if 5 minutes if it's true or not.  
Just do as I suggested in my previous post.
Then we will all know.

73 - Rick, DJ0IP
(Nr. Frankfurt am Main)

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Carl
Moreschi
Sent: Wednesday, April 09, 2014 9:55 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] TECHNICAL: Wish List for ORION-III

You just should not comment about things you don't now about.

Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com

On 4/9/2014 3:40 PM, Rick - DJ0IP / NJ0IP wrote:
> Carl, I'm talking about TX noise, not RX noise.
> And I don't think I am being unfair when I repeat things which I have 
> heard Rob Sherwood say.
> I only clearly stated that I was not sure if the 6500 radio is like 
> this but most of the others are.
>
> Do the following.
> Set up your 6500 on an antenna and set up one of your other radios on 
> another antenna.
> Listen on the other rado and key the 6500 in SSB mode without speaking 
> into the mic.
> If it creates a broad noise across all bands, disturbing the other 
> receiver, it's noisy.
> This is that broadband noise I'm speaking about.
>
> You have a 6500, please try it and tell us.
> I've never even seen one.
>
> Also, repeat the test using the Orion as the TX.
> It will be clean, I know for sure!
>
> People often forget that a lot of other things factor in when you are 
> trying to operate in a multi-TX environment.
> If you are using the radios one at a time, they are usually just fine.
>
> AT THIS POINT I HOPE ROB SHOWS UP TO BAIL ME OUT (hi).
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Carl 
> Moreschi
> Sent: Wednesday, April 09, 2014 7:28 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] TECHNICAL: Wish List for ORION-III
>
> 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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