[K3] [Elecraft] It have to work better!

[Alexander Ponomarenko]

Hi Eric,

may be error in schematic, may be in my head. :)

Please look on these new plots:

here is plot with s9-level signal from XG1 BEFORE replaced W16:
http://forum.cqham.ru/download.php?id=32057

and here is plot with s9-level signal from XG1 AFTER replaced W16:
http://forum.cqham.ru/download.php?id=32650

Please, any yours comments.

73!
Alex UR5LAM


Eric Swartz - WA6HHQ, Elecraft wrote:
> The schematic is in error. It was found that the coax was unnecessary.
> 
> The levels of signals reported are not audible at greater than 50-60 dB 
> down from normal signals and do not impact our sensitivity spec.
> 
> 73, Eric  WA6HHQ
> ----
> 
> 
> Barry N1EU wrote:
>> Alexander Ponomarenko-5 wrote:
>>  
>>> In original K3 the W16 is monowire (on top of the RF-board),
>>> but if we will analyze the scheme, we can see that W16 must be in the 
>>> screen.
>>> The W16 are near non screen-shielded BP-Filters, and we can see 
>>> second RX-channel on my first web-link:
>>> http://forum.cqham.ru/download.php?id=32620
>>> You can get out monowire W16, and replace to new W16 (behind RF-board 
>>> in our opinion).
>>> You must to use coaxial-cable for W16. I'm used silver-plated 
>>> screen-shielded video-cable from Supra.
>>>
>>>     
>> Yes, that seems correct Alex.
>>
>> The K3 schematic clearly shows that W16 is supposed to include a grounded
>> shield. 
>> 73,
>> Barry N1EU
>>
>>   
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