[TowerTalk] Triplexer

[Jim Thomson]

Date: Mon, 18 Apr 2016 15:15:34 -0700
From: jimlux <jimlux at earthlink.net>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Triplexer

On 4/18/16 8:06 AM, Jim Thomson wrote:


> ##  do they actually work good ?   Can you stuff 4.5 kw up through  213 U..
> or do you use bigger coax ?   They must be some serious coin.

0.405" coax can handle 3700V, so your practical limit is going to be 
current/heating.  On 40m, 3700W is the rating, on 20, 2600W.  So 4500W 
would be a lot.

&&&  No, what I meant was say 3 amps, all running 1.5 kw RTTY.. simultaneously
= 4.5 kw average power.   Per Eimac, that would be the same as a 3 tone signal,
with each tone having an average power of 1.5 kw.   
(Number of tones) squared,  X 1.5 kw  =    13.5 kw pep out. 
13.5 kw pep out =  825V rms = 1166 V peak. 

&&&  4.5 kw average, would be max worse case.  Still, on CW,  with all
3 on TX, it would still be aprx 2 – 2.25 kw average.  So it may still work. 

&&&  The other issue would be the tribander would be pointed in 1 direction,
so all  3 bands would also be in one direction, which may not be what you want.
But folks with rotating towers face the same dilemma. 

Jim   VE7RF