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@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@DJ0IP.de>
To: "'Discussion of Ten-Tec Equipment'" <tentec@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@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@DJ0IP.de>
> To: "'Discussion of Ten-Tec Equipment'" <tentec@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@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@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 ------------------
>
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