When I compare radios, I take a pair of identical small stereo speakers and
connect one to each radio.
Then I run a bunch of subjective tests... and then swap the speakers and run
the tests again.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Darrell
Bellerive
Sent: Wednesday, November 23, 2016 9:47 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Bring back the corsair 2
I agree that the comparison needs to be made using all the capabilities of
each rig. Each rig should be set up to present the clearest presentation of
the desired signal regardless of bandwidth, gain, filters, etc. What counts
is how well one can copy a weak signal in the midst of noise and interfering
signals. If one receiver is so much noisier than another, there should be a
case where one receiver will present a copyable signal to the operator, and
another receiver will not be able to do so.
Also, capturing audio from speakers with a moving microphone is a poor way
of properly capturing the audio. Ideally audio should be recorded directly
from the speaker jacks via a proper interface that provides a correct load
for the audio amp in the radio and the proper signal level for the recording
equipment. That way room acoustics and microphone position and surrounding
materials are not influencing the audio recorded. Also, recording audio from
a low level output on the receiver bypasses noise and distortion caused by
the final audio amp and is not a true capture of the receiver audio.
If a speaker and mic must be used, at least use one speaker for both radios
with a fixed position mic directly in front of the speaker.
73, Darrell VE7IU
On 16-11-23 11:42 AM, rick@dj0ip.de wrote:
> Steve,
> Did you try reducing the RF GAIN or turning on the ATTN on the 7300?
>
> Also, I don't understand why you say "it isn't fair" to turn on the NR
> on the 7300.
> That's its tool. The Corsair has other tools which you used (AF filter).
>
> There is no question that the Corsair sounded better but maybe a
> pruning of parameters on the 7300 might have decreased the difference.
>
> In any case, I don't think there is any chance that anyone will ever
> build a purely analog rig again, regardless of what the comparisons
> show. Maybe that will increase the resale value of Corsairs.
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt, Germany)
>
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Steve
> Ellington
> Sent: Wednesday, November 23, 2016 8:00 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Bring back the corsair 2
>
> I had a loaded K3s then bought an IC-7300 and the noise level was
> slightly lower to the point that the K3s started gathering dust.
> Recently I picked up a couple of Corsair II's having forgotten what
> they were like. After listening to the Corsair II for a while the
> noise coming from the IC-7300 sounds like Darth Vader's breathing.
> Just a few minutes ago I tried to have a QSO with a guy and I was
> having a terrible time trying to copy his CW. I switched to the
> Corsair II and felt total relief flood by frazzled brain. I kicked in
> the 500 hz xtal filter. The noise actually goes down instead of up as
> it does in DSP rigs. I then brought in about 50% audio filtering and he
sounded like a CPO...Remember those?
>
> The Corsair II was the last of long like of analog rigs from TenTec.
> PLL and DSP started creeping in and up came the noise.
>
> Here's a couple of videos I made to help get the point across. Again
> let me say that the 7300 is one of the quietest (modern) radios I've
> had and boy does it sound noisy next to the Corsair II!
>
> https://www.youtube.com/watch?v=oX8EWUcnvBU
>
> https://www.youtube.com/watch?v=8LBbiXXRex8
>
> It's frustrating. I don't want it to be this way. I want a receiver
> that's better than the Corsair II. What to do?
>
> steve n4lq
>
> On Wed, Nov 23, 2016 at 1:32 PM, Steve Berg <wa9jml@frontier.com> wrote:
>
>> There is no way that it would be profitable to recreate the Corsair
>> II these days. I really love my Corsair II, and its external VFO.
>> But, I also realize that its days are numbered because many of the
>> parts in it are no longer available. And, while it was an
>> outstanding DX and contest radio when it was built, it is not
>> suitable for contesting any more. Mine has done a great job for DXing
from my rather poor location.
>>
>> I like it because after several years I have learned its quirks, and
>> how to best use it under varying conditions. Realizing its age, I
>> bought an Omni VII during the fire sale so that I would have a decent
>> and much newer radio when the Corsair II finally breathes its last.
>> After several months, I put the Omni VII on the shelf, and went back
>> to the Corsair II. I eventually found a good home for the Omni with
>> a newly minted ham. I don't miss it. It seemed to require a lot of
>> menu usage for simple operations, and for which the Corsair II just
>> requires a bit of adjustment of a knob or two. I was very impressed
>> with the Eagle when I used one at the factory several years ago.
>> Would I buy one at $1700 to have a backup for the Corsair II? Most
>> likely yes, especially to help keep Ten Tec afloat. Most of the
>> Japanese radios make extensive use of menus, and I don't like using
>> those. I have two Argonaut VI radios, and the receivers in those are
>> simply incredible. I would like to buy 2 more of them for use as
>> VHF/UHF IF radios for transverters. They are apparently similar to
>> the receiver in the Eagle, so that would be yet another reason to buy
>> an Eagle. Since I have little use for contesting, that does not
>> enter
> into my preferences in rigs.
>> I have also worked in economic development as a city administrator
>> and was on the county economic development board out where I last
>> worked in this field. What Mike describes is what we referred to as
>> elephant
> hunting.
>> And, I suspect that his comments about economic development being
>> taken over by the local Chambers of Commerce is sadly true. What
>> these people do not understand is that by helping out smaller
>> companies, there is a significant increase in a multiplier effect
>> through
> the local economy.
>> And, the local governments also have to provide less in the way of
>> tax expenditures and other incentives. Where I live now local
>> governments give too many incentives to retail and warehousing, which
>> do not pay enough to support a family. They are trying to capitalize
>> on the local university students, but wind up shooting themselves in
>> the foot rather frequently. I would love to see a federal suit
>> challenging economic incentives on the basis of the Fourteenth
>> Amendment's Equal Protection Clause. That would really start to
>> level the playing field in
> local economic development.
>> Your Mileage May Vary...
>>
>>
>> Steve WA9JML
>>
>>
>>
>> On 11/23/2016 10:33 AM, Ron Notarius W3WN wrote:
>>
>>> Yeah, like that's going to happen...
>>>
>>> Considering what Dishtronix has dealt with, prior to the Ten Tec
>>> acquisition, in regards to overseas manufacturers, I have some
>>> serious doubts that Mike would seriously do this. Even if there is
>>> sufficient market for the rig today, which I suspect there isn't.
>>>
>>> Now if you could design a Corsair III, including a DDS type dual
>>> VFO, and could afford to build it domestically and sell it at a
>>> small profit for circa US$600, you might have something. Maybe.
>>> But built in China? I doubt it.
>>>
>>> 73, ron w3wn
>>>
>>> -----Original Message-----
>>> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of
>>> gary mankoff
>>> Sent: Wednesday, November 23, 2016 10:36 AM
>>> To: tentec@contesting.com
>>> Subject: [TenTec] Bring back the corsair 2
>>>
>>> We need a new corsair 2 ,just like the old one with the filters
>>> installed ,made in China.
>>> This is the only way TT can compete.
>>>
>>> Sent from my iPad
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>>
>>> ---
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>>>
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>>>
>>>
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--
Darrell Bellerive
VE7IU
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