[Elecraft] K3 Power supply
Jan Erik Holm
sm2ekm at telia.com
Tue May 12 12:07:05 EDT 2009
And this is not the point!!!
Read what K7TV wrote first and then what I
commented on.
Then K7TV started to rant about things beside
the point.
/ SM2EKM
------------------
Bill W4ZV wrote:
> Here's the FT-1000 meter...8 dB total difference from S5 to S1:
>
> http://www.n6rk.com/FT1000_S_meter.doc
>
> 73, Bill
>
>
>
> Bill W4ZV wrote:
>> Erik you're correct. The table below shows the FT-1000MP (not "D" but I
>> bet very similar) has a nonlinear response in the low range of the meter.
>> Most rigs (other than the K3 and Flex 5000) have the identical problem.
>>
>> http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/SMeterBlues.htm
>>
>> 73, Bill
>>
>>
>>
>> K7TV wrote:
>>> Jim,
>>>
>>> I take it you were commenting on the S-meter. I don't have the rig
>>> anymore;
>>> I sold it to buy the K3. It was generally working very well, and it
>>> behaved
>>> this way from day one (I bought it new around 1992) and I never saw a
>>> need
>>> to align it. The buyer has not complained. My statement was based on
>>> starting at S-9 and applying attenuation 6 dB at a time. My memory may be
>>> slightly off, but generally I saw the same behavior in the 1000D as in my
>>> old IC-735. The meters would be quite good above S-7. Starting at S-7 and
>>> attenuating another 6 dB they would indicate about S-5, and after another
>>> 6
>>> dB the needle would be at 0. I remember memorizing this and using it to
>>> give
>>> reports. Because it seemed so consistent between the two rigs, I formed
>>> the
>>> opinion that it was the consensus of the manufacturers, and again saw no
>>> reason to question the 1000D's alignment. Of course, with
>>> preamplification
>>> on, the meter would start moving at a lower level, maybe S3. Over the
>>> years
>>> I have seen comments in articles that have seemed to avoid
>>> generalizations
>>> and instead said things like "S-meter calibrations vary a lot from
>>> receiver
>>> to receiver". I wouldn't be surprised if Yaesu had changed the AGC
>>> parameters sometime during the long production run.
>>>
>>> 73,
>>> Erik K7TV
>>>
>>> ----- Original Message -----
>>> From: "Jan Erik Holm" <sm2ekm at telia.com>
>>> Cc: <elecraft at mailman.qth.net>
>>> Sent: Monday, May 11, 2009 8:25 PM
>>> Subject: Re: [Elecraft] K3 Power supply
>>>
>>>
>>>> Sorry but this is totally wrong. In this case your FT-1000D
>>>> was either broken or not aligned properly.
>>>> If you still have it align it per the service manual and
>>>> you will see something totally different.
>>>>
>>>> 73 Jim SM2EKM
>>>> ------------------------------
>>>> Erik N Basilier wrote:
>>>>> Merv,
>>>>>
>>>>> My experience with the FT-1000D was that the S-meter didn't start to
>>>>> move
>>>>> until the actual signal strength reached S-5 or so. But yes, I believe
>>>>> you
>>>>> when you say that the switching power supply creates a lot of noise,
>>>>> and
>>>>> the
>>>>> one in the FT-1000D doesn't.
>>>>>
>>>>> 73,
>>>>> Erik K7TV
>>>>>
>>>>
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>>
>
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