[CQ-Contest] Bandpass filter

[Barry]

I used off-the-shelf Top Ten Devices boxes.  It didn't require any 
custom design from them.  To get the band decoders to switch multiple 
devices (stubs, bandpass filters and antennas) in a neat way, I used old 
computer A/B/C boxes with DB-25s on them.  I ripped out the switches and 
wired them so that the band decoder output would go to all 3 connectors, 
in parallel, and  switch everything together, using DB 25 cables with 
the connector cut off one end, going to the relay boxes.

Barry W2UP

On 7/4/2012 8:36 PM, Timothy Coker wrote:
> There is a good article that was published in NCJ... K6LA paid Top Ten
> Devices to make such a thing for his QTH. The article is available for
> reading on Top Ten's website.
>
> 73,
>
> Tim /N6WIN
> On Jul 4, 2012 7:15 PM, "Gary Sutcliffe" <w9xt at unifiedmicro.com> wrote:
>
>> Has anyone built a switching stub box for multi-band operation that
>> switches in the proper stubs for the current band?  Any issues or things
>> to watch out for?
>>
>> Thanks!
>>
>> Gary, W9XT
>> www.w9xt.com
>>
>>> 15m stub system that rejects 20m provides this feature.
>>> http://www.k1ttt.net/technote/k2trstub.html
>>>
>>> K2TR recipe via K1TTT web says a 23' piece of RG213 as a shorted stub
>>> stops 10&20m; passing 15m.
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