[CQ-Contest] Coax Stubs for SO2R

[Joe]

Ok distance from the amp, as described below, can make a difference. on 
the level of blocking harmonics.
Now how about on recieve side if you want  say youre on 20 and want to 
block 40, does this distance still apply?
On Field days we just had a "T" on the back of the radio and hooked as 
needed what stub was needed to block the offending station.

Joe WB9SBD

Sig
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On 9/9/2015 9:51 AM, Randall K Martin wrote:
> Jeff, regarding stubs on six-pack, I place mine on the six individual 
> band ports. A few are "Tee-d" in right at the SO239 on the six pack, 
> but most are connected with a "T" a short distance away.
>
> I need to rethink this, based on the knowledge that there is a proper 
> distance that the stubs should be placed away from the amplifier 
> output, and that the distance also depends on the tank circuit of the 
> amp. My amps are different, and I couldn't tell you how long the coax 
> lines are between the amps and the six pack without measuring them.
>
> I can say that my stubs do make a difference.
>
> Frank W3LPL can you steer me towards any references discussing how to 
> eliminate RFI from T2X controller boxes? I have three of them.
>
> 73 Randy K0EU
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