Nevada Amateur Radio Repeaters, Inc. wrote:
> Ref: <www.telewave.com/pdf/TWDS-4015.pdf
> <http://www.telewave.com/pdf/TWDS-4015.pdf>>
>
> I looked at the Celwave dual stages circulator rated at 150 watts a dual
> stages with a 35 watt dummy load on each stage. I don’t understand the
> design since I have seen and used two stage circulator with a 100 watt
> dummy load on the first stage and a 25 watt dummy load on stage two.
> What make two 35 watt dummy loads in series ok? What am I missing?
I saw some weird numbers on some of these recently also when I was
trying to compare apples-to-apples.
As best I could figure out, the 150W "rating" from some manufacturers
was how much power you could put THROUGH it from the transmitter port,
not how much power it was going to isolate coming back down the antenna
feed-line.
You may want to see how many dB of "isolation" they rate it for and do
the math and see if that's 150W. I doubt it.
That first load will just get really really HOT if you shove 150W into
the antenna side... heh. Probably burn it up.
Of course, if you have 150W coming back down the antenna... you're on a
really wicked site. (Yeah, I know we've all seen that there ARE some
really wicked sites... usually power like that means you're right up
against a broadcaster of whatever variety.) :-)
Nate WY0X
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/Repeater-Builder/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:[EMAIL PROTECTED]
mailto:[EMAIL PROTECTED]
<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
