[Mldxcc] Interstation Interference,

[Richard (Rick) Karlquist (N6RK)]

I never noticed any self-QRM, but I wasn't
on 15 meters.

FWIW, it is far more effective to make traps
with a coil and capacitor than a stub.  A piece
of coax is a very low Q resonator, and you
can't choose the effective L/C ratio (it's fixed
by the 50 ohm impedance.)  You can parallel 2 or
3 pieces of coax in the stub to help with this to
some extent.

Also, to keep 40 meters out of 15 meters, a low
pass filter on the 40 station and a high pass filter
on the 15 station would make more sense than traps.

Rick N6RK

> -----Original Message-----
> From: mldxcc-bounces at contesting.com
> [mailto:mldxcc-bounces at contesting.com]On Behalf Of Bill
> Sent: Wednesday, December 07, 2005 9:14 PM
> To: Jeff Stai
> Cc: Mldxcc at contesting.com
> Subject: [Mldxcc] Interstation Interference,
> 
> 
> To the folks who have operated here in the last couple months,
> 
> Please tell me what you recall about interstation interference. 
> Just before
> CQWW SSB I installed stubs to keep 15M out of 40M and 40M out
> of 15M. Trivial tests suggest meaningful improvement.
> 
> I'd like to hear from any/all about how things went wrt interstation
> interference no matter what bands you were on. Specifics would be
> great but generalities will be appreciated as well.
> 
> Thanks for taking the time to reply,
> 
> Bill K6KM
> 
> >  
> >
> 
> _______________________________________________
> Mldxcc mailing list
> Mldxcc at contesting.com
> http://lists.contesting.com/mailman/listinfo/mldxcc
> 
>