[TenTec] Corsair II noise blanker

Sun Mar 30 14:42:28 EDT 2014

Correct again, the C-22 is a DC.(receives a CW sig on both sides)

I guess not good for your QTH for specific reasons as referenced!

I am sure it's vintage is not even in the same ballpark with the present day 
SDR DC....as you say a world of difference indeed.

-73-

++++++++++++++++++++++++++++++++++++++++++

----- Original Message ----- 
From: "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de>
To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
Sent: Sunday, March 30, 2014 6:37 AM
Subject: Re: [TenTec] Corsair II noise blanker

> As I recall, the Century series were direct conversion receivers.
> Those don't fare well on 40m here in EU and 40m is my favorite band.
> Of course the modern SDR radios are also direct conversion but there is a
> world of difference between their design and the dc radios of yesteryear!
>
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of 
> paulpolace
> Sent: Sunday, March 30, 2014 5:37 AM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Corsair II noise blanker
>
> Rick,
>
> Actually was only a variable 8 pole "audio" bandpass filter, but somehow
> produces some fantastic results in relation to noise as well.
> There was always talk that the C-22  incorporated the "Jones Filter" but 
> the
> patent on it was filed in 1989 and the C-22 made in early mid 80's 84 ETC.
>
> The early Argonauts were produced prior to the Century-22 so not sure if 
> the
> C-22 inherited any circuitry from them?
>
> If you ever come across one Rick, you must give it a spin, kind of hard to
> explain the experience!
>
> Yes I remember the outboard filters, in the day manufactured for the
> Woodpecker...Now we have neighbors electric fences and grow lamps to deal
> with!
>
> Kind Regards... -GL-  -DX-
>
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
>
>
>
>
> ----- Original Message -----
> From: "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de>
> To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
> Sent: Saturday, March 29, 2014 7:21 PM
> Subject: Re: [TenTec] Corsair II noise blanker
>
>
>> Are you referring to the LC BPF's in the front end?
>>
>> I never saw a Century but if it has the elevator like the Argonauts and
>> Tritons had in those days, then yes, in general it did help reduce 
>> overall
>> noise, but it will not help on things like the pop of an electric fence.
>>
>> In fact, back in the days of the Woodpecker, whose signal was wide but 
>> its
>> signal strength was frequency dependent, I could slightly de-tune the
>> preselector on my Omni and then hear signals better than I could on JA
>> rigs
>> with no tunable preselector... as long as I wasn't trying to listen to a
>> signal near the Woodpecker's frequency.
>>
>> 73 - Rick, DJ0IP
>> (Nr. Frankfurt am Main)
>>
>>
>> -----Original Message-----
>> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of
>> paulpolace
>> Sent: Saturday, March 29, 2014 11:35 PM
>> To: Discussion of Ten-Tec Equipment
>> Subject: Re: [TenTec] Corsair II noise blanker
>>
>> Correct Rick!
>>
>> The topic is NB... NOT... NR.
>>
>> Hard to believe or understand... yet my Century-22 actually handles noise
>> better than the Omni VII, and were going way back.
>> Could the variable 8-pole bandpass filter been designed so well that it
>> accounted for such noise as well? or possibly just my experiences.
>>
>> The Eagle here also does a better job than the Omni VII.
>>
>> Interesting the NB in My Kenwood TS-590 works unbelievably well, yet the
>> design on that one allows a variable user interface to set accordingly.
>>
>> Also Good Info there N6KB
>>
>>
>> -73-  -DX-
>>
>>
>> +++++++++++++++++++++++++++++++++++++++++++++++++++
>>
>>
>>
>>
>>
>>
>> ----- Original Message -----
>> From: "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de>
>> To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
>> Sent: Saturday, March 29, 2014 3:02 PM
>> Subject: Re: [TenTec] Corsair II noise blanker
>>
>>
>>> Correct, but the topic was NB, not NR.
>>> The Eagle's NB is better than the OM7's.
>>>
>>> The reverse is true for NR.
>>>
>>> 73 - Rick, DJ0IP
>>> (Nr. Frankfurt am Main)
>>>
>>>
>>> -----Original Message-----
>>> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of R. Eric
>>> Sluder - W9WLW
>>> Sent: Saturday, March 29, 2014 5:16 PM
>>> To: Discussion of Ten-Tec Equipment; K8JHR
>>> Subject: Re: [TenTec] Corsair II noise blanker
>>>
>>> I like the NR in the Omni VII much better than the one in the Eagle. 
>>> The
>>> audio characteristics in the Eagle change dramatically in SSB and AM
>>> modes.
>>>
>>> On March 29, 2014 12:22:06 AM EDT, K8JHR <jrichards at k8jhr.com> wrote:
>>> |Ken and Bob -
>>> |
>>> |Man... thanks - exactly the sort of explanation I wish they would put
>>> |in user manuals for guys like me who are not radio engineers.
>>> |
>>> |Sidebar --
>>> |
>>> |There is an on-going debate on a Brand X radio forum, whether one NB
>>> |(and/or NR) circuit is better than another.  The answer seems to be:
>>> |"it depends" on the type of noise, and how it interacts with the
>>> |desired signal.
>>> |
>>> |My Take --
>>> |
>>> |Satisfaction with NR and NB is entirely dependent on one's
>>> |expectations, generally, and one's tolerance of the necessary tradeoff
>>> |between
>>> |intelligibility and audio quality.   I am a fan of both internal and
>>> |outboard DSP noise filters, but I know greater intelligibility comes
>>> |with a price in lower audio quality.
>>> |
>>> |On the Brand X forum, some operators expect clean, pure, audiophile
>>> |results after scrubbing and scouring with NR, NB, and related tools.
>>> |Unfortunately, there just ain't no free lunches these days.
>>> |
>>> |Wish List Item --
>>> |
>>> |I like the NR on my Omni VII, although I preferred how it worked in
>>> |earlier firmware.  (I am less enamored with the NR on my Orion II.)
>>> |
>>> |Too bad we cannot select feature updates from a smorgasbord of firmware
>>> |
>>> |versions, sort of a mix-n-match thing.  Now, THAT would be cool.   (I
>>> |can, however, just imagine the programming nightmare THAT might entail!
>>> |
>>> | We would be visiting John Henry in the looney bin sooner than later!)
>>> |     ;-)
>>> |
>>> |Just My take.
>>> |
>>> |------------------------ K8JHR  ------------------
>>
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 2014.0.4354 / Virus Database: 3722/7256 - Release Date: 03/27/14
>>
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2014.0.4354 / Virus Database: 3722/7256 - Release Date: 03/27/14
> 