[Elecraft] K2-XV222 RFI Susceptibility Problems - a solution found

[wayne burdick]

Hi Steve,

Minicircuits makes a 30 MHz in-line (BNC) low-pass filter that should  
do just as well, for those who don't want to roll their own: their  
model #BLP-30+. See:

     
http://www.minicircuits.com/cgi-bin/modelsearch? 
search_type=info&model=BLP-30%2B

I would recommend this filter if anyone has similar RFI problems with  
any transverter, used with either a K2 or K3.

73,
Wayne
N6KR


> From: Steve Kavanagh <skavanagh72 at yahoo.ca>
> Subject: [Elecraft] K2-XV222 RFI Susceptibility Problems
>
> A couple of weeks ago I posted here regarding a problem whereby
> transmitting on my 6m rig cause my XV222 (connected to K2/K60XV) to
> key
> up.
>
> It appears that if any moderate amount of stray RF ends up on the
> tranmit
> IF line (probably due to imperfect shielding of the transverter rear
> panel
> jacks), this power is then detected by the power detector diode on
> the
> K60XV
> board, which then apparently triggers the K2 to switch the state of
> the
> 8R
> line.  This then keys the transverter.

> I have found a solution which works at my home station.  That is to
> put
> a
> filter in the transmit IF line which passes 28 MHz but does not pass
> 50
> MHz.


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