[Elecraft] K3 Power supply

[Erik N Basilier]

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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