[TenTec] In praise of older technology AM transmitwithTenTecrigs

[Bob McGraw - K4TAX]

Bryan et al;

Are you in to heavy contest operating?   If not, as Rob Sherwood indicated, 
a radio with a 2 kHz Dynamic range of  80 dB is most adequate for ones 
operations.  There are more important attributes than just the close spaced 
dynamic range.   One needs to look at the "big picture" and not just one 
attribute.

With the Omni VII, the Eagle, the Argonaut VI the Elecraft K-3 and the 
TS-590 at my disposal and on the desk, I'll reach for the Omni VII with the 
optional filters and optional ATU every time.

I'm now adding a new amp to the station.  More on that selection later.

73
Bob, K4TAX



----- Original Message ----- 
From: "Brian Carling" <bcarling at cfl.rr.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Thursday, February 27, 2014 6:31 AM
Subject: Re: [TenTec] In praise of older technology AM 
transmitwithTenTecrigs


> Which model number INRAD filter do I want for 600 HZ roofing in my Omni VI 
> Plus please ?
> Sorry for my ignorance but they list so many, and I want to be sure...
>
> Of course, I could also put the money toward saving up for a nice OMNI VII 
> !
>
> Best regards - Bry Carling AF4K
>
>
>
>> On Feb 26, 2014, at 4:22 PM, "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de> 
>> wrote:
>>
>> Let me put some meat behind my previous post:
>>
>> Filter:.....TenTec....INRAD....INRAD
>> Filter:.....Stock.....600Hz....2400Hz
>> -------------------------------------
>> - 2 kHz.....79dB......94dB.....85.5dB
>> - 5 kHz.....82.5dB....97dB.....95.5dB
>> -10 kHz.....86.5dB....98dB.....96.5dB
>> -20 kHz.....95dB......97.5dB...97.5dB
>>
>> As you see, at 2kHz spacing, the BDR3 improves by 15dB with the 600 Hz 
>> INRAD
>> roofing filter.
>> There is nothing you can do to an OM7 or IC7800 (within reason) to come
>> anywhere near this level of performance.
>> NOTHING!
>>
>> The fundamental difference here is the technical difference between 
>> upward
>> conversion and downward conversion.
>>
>> AT THIS POINT Rob always jumps in and points out that it is not 
>> impossible
>> with upward conversion.
>> Indeed the PT-8000 achieves it, but at a $17K price tag.
>> That's why I added the modifier, "within reason".
>> For those of us who work for a living, $17K is beyond reason!
>>
>> 73 - Rick, DJ0IP
>> (Nr. Frankfurt am Main)
>>
>> -----Original Message-----
>> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Rick -
>> DJ0IP / NJ0IP
>> Sent: Wednesday, February 26, 2014 6:38 PM
>> To: n4py3 at earthlink.net; 'Discussion of Ten-Tec Equipment'
>> Subject: Re: [TenTec] In praise of older technology AM
>> transmitwithTenTecrigs
>>
>> The Omni VI with the INRAD roofing filter is about 15 dB better than the 
>> OM7
>> or 7800.   Really no comparison.
>> There most certainly is a difference but you will probably only notice it 
>> in
>> a side-by-side comparison during a BIG contest; not in every day life.
>>
>> I don't recall Rob ever testing the VI with INRAD.
>>
>> 73 - Rick, DJ0IP
>> (Nr. Frankfurt am Main)
>>
>> man/listinfo/tentec
>>
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