[CQ-Contest] Bandpass filter

Martin Durham w1md at cfl.rr.com
Fri Jul 6 03:14:15 PDT 2012

One coax to the antenna...  It is designed for (and tested at) 1500w per band. 


Martin Durham
System Engineer, Harris corp.
Mdurham at harris.com

Sent from my iPad

On Jul 6, 2012, at 5:00 AM, Jukka Klemola <jpklemola at gmail.com> wrote:

> Cool if you used one coax for all three 800W radios .. did you ?
> Even such triplexers can be done with careful design and then pruning
> the Farads, Henrys and walls in the box.
> I think there was a 100W grade one coax triplexer in QST or QEX not so long ago.
> 73,
> Jukka OH6LI
> 2012/7/6 Martin Durham <w1md at cfl.rr.com>:
>> We ran 3 K3's into a C31XR with approx.. 800W from each 'band'...only 800w
>> because we were AC limited at the QTH. A custom highpower TRI-plexer was
>> built and used on the C31XR. It worked amazingly well...ran ARRL CW this
>> past spring as PJ4X...
>> The tri-plexer is 'not' your average 'build at home' affair...and it is NOT
>> cheap...but it works. :)
>> Interesting thread.
>> 73,
>> Marty
>> W1MD
>> -----Original Message-----
>> From: cq-contest-bounces at contesting.com
>> [mailto:cq-contest-bounces at contesting.com] On Behalf Of Keith Dutson
>> Sent: Thursday, July 05, 2012 9:21 AM
>> To: 'Timothy Coker'
>> Cc: 'Tom W8JI'; cq-contest at contesting.com
>> Subject: Re: [CQ-Contest] Bandpass filter
>> Did not realize you were using a C31XR.  I would not have guessed a
>> situation like this where two rigs were connected to the same antenna.

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