[Elecraft] K3 Birdies

[David Gilbert]

I found that the instructions for how to route the various cables were a 
helpful start, but after a LOT of trial and error I found that in some 
cases other positions worked much better.  And of course, some positions 
work better for some birdies while other positions work better for other 
birdies.

On a whim, I even did an amusing experiment where I stuffed the spaces 
in the case with carbon impregnated foam (enclosed in plastic bags to 
avoid potential shorts) in order to hopefully absorb some of the RF 
floating around.  Unsurprisingly, it didn't help a bit.

SIG RMV made all the difference in the world for me.  Properly done, it 
totally removed almost all of the birdies and the two or three that 
remained were dropped to very low levels.  It was a very clever fix by 
the Elecraft team.  It did, however, need to be redone when I swapped 
out the old synths for the new ones even though I kept the cable 
locations the same.

73,
Dave   AB7E



On 7/30/2022 9:44 AM, Victor Rosenthal 4X6GP wrote:
> SIG RMV can help, but before you do this, look in the manual for 
> instructions about how to dress the cables to and from the 
> synthesizers and the SUBRX. Make sure they are plugged in all the way, 
> too.
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> Formerly K2VCO
> CWops no. 5
> http://www.qsl.net/k2vco/
>
> On 30/07/2022 18:33, Michael C. Marx wrote:
>> Hi All
>>
>> I have an 11 year old K3 s/n 6xxx.  I have noticed lately there seem
>> to be quite a few birdies pretty well everywhere.   This doesn't seem
>> right.  I hear many of them with the antenna connected.  The radio is
>> pretty well loaded and does have the updated synthesizers. Also has
>> the sub rx.    Any ideas of what I should do or do I need to send it
>> back to Elecraft?
>>
>> 73! Mike WB0SND
>>
>> Michael Marx SND Tube Sales www.vacuumtubes.com 636-939-9190 
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