[Elecraft] K3 Power supply

[Bill W4ZV]

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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