Mr. McGraw is the epitome of a Southern Gentleman!
We would all do well to follow his example.
Reed / WW3A
On Jul 12, 2014 6:27 PM, "K8JHR" <jrichards@k8jhr.com> wrote:
> Thanks, for the uptake Bob.
>
> I appreciate you are the only one to provide any substantial information,
> free from condescending comments, in your reply.
>
> ---------------- JHR ----------------
>
>
>
>
>
>
>
> On 7/7/2014 8:14 AM, Bob McGraw - K4TAX wrote:
>
> Measurements were done on my personal TS-590. I repeated this test
>> several times over a period of time and obtained near identical
>> results. A 2nd TS-590 was being used at a Field Day site. It was noted
>> by others that the noise increased on their receivers when the TS-590
>> was in transmit regardless of band or mode of operation. Coincidently,
>> I did have my analyzer at the site and observed this unit during
>> transmit. The results were almost identical to those of my personal
>> radio. These radios were of different ages although no production lots
>> or dates were noted. Rick has identified a similar occurrence and
>> incident in Europe with one or more of these radios. Although likely
>> not statistically adequate for the number sold, those reliably measured
>> or evaluated show 100% of those show excessive spectrum noise when in
>> transmit.
>>
>> Under advice of council, I will not comment further, only to say that
>> Kenwood has been notified and supplied my test results by certified mail
>> some months ago. They have yet to respond.
>>
>> 73
>> Bob, K4TAX
>>
>>
>>
>>
>>
>> ----- Original Message ----- From: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
>> To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
>> Sent: Monday, July 07, 2014 4:08 AM
>> Subject: Re: [TenTec] On Noisy Transmitters
>>
>>
>> James, if you join the Elecraft group and read the history files, you'll
>>> find lots of references.
>>> One of them was an analysis of the circuitry in the 590, explaining
>>> what the
>>> technical problem was and how Kenwood could have avoided it by
>>> spending just
>>> a little more on better components.
>>>
>>> BTW, both incidents I reported on had a pair of 590s, not just one.
>>>
>>> Regardless, Bob has measurements of the 590 on spectrum analyzer, showing
>>> the problem, and engineers have explained what the exact cause is, so
>>> it is
>>> a bit ludicrous to argue statistics here. Fundamentally, the reason is
>>> "CHEAP".
>>>
>>> If we all cry together out demanding cleaner transmitters, we will one
>>> day
>>> get them.
>>> But as long as people keep sticking up for the OEMs, they aren't going to
>>> change anything.
>>>
>>> 73 - Rick, DJ0IP
>>> (Nr. Frankfurt am Main)
>>>
>>>
>>> -----Original Message-----
>>> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of K8JHR
>>> Sent: Monday, July 07, 2014 1:39 AM
>>> To: Discussion of Ten-Tec Equipment
>>> Subject: Re: [TenTec] On Noisy Transmitters
>>>
>>> I put little stock in one test at one site by one group of guys on early
>>> production units. I know there are loads of 590s in service in contest
>>> group shacks and have been used happily on many FD sites, so the question
>>> becomes one of statistical significance.
>>>
>>> Rick reports on just TWO (early production) TS-590s at a German
>>> contest club
>>> station. I know Bob had a similar experience with one or two 590s at
>>> a US
>>> FD site. But I have NOT been presented with credible reports from any
>>> other
>>> group and this has not been discussed to ANY degree on any of the 3
>>> TS-590
>>> web discussion groups - and I moderate one of those lists daily.
>>>
>>> I do not dispute these stories ... I only wonder whether 4 or 5 reported
>>> cases is statistically significant. A great number of 590s are
>>> playing well
>>> among other rigs in a great number of shack world wide without
>>> problems. My
>>> 590 was nice and quiet and played well with other rigs close by. I
>>> cannot
>>> get too excited over this until I see more
>>> (credible) data and (actual) documented cases. There appears to be
>>> far more
>>> than 12,000 units in service, and this is just not an issue among actual
>>> owners.
>>>
>>> (He said reaching for his Teflon suit.) ;-)
>>>
>>> ------------------ JHR -------------------------------
>>>
>>> On 7/6/2014 6:50 PM, Darrell Bellerive wrote:
>>>
>>>> Would you publish this list?
>>>>
>>>>
>>>> On Sunday, July 6, 2014 4:07:52 PM Rick - DJ0IP / NJ0IP wrote:
>>>>
>>>>> Every now and then we run these tests at one of our multi-multi
>>>>> contest stations on all the transceivers we can find. There we have
>>>>> lots of antennas but generally pretty far apart. If one of the
>>>>> radios causes noise to all others, it gets banned from the site.
>>>>> Most of the low cost Japanese radios have been banned because they
>>>>> disturb the other 5 bands when they transmit.
>>>>>
>>>>
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>>
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