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Re: LF: Re: Re: TIL QRO for EU sunrise...

from [Scott Tilley] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: Re: Re: TIL QRO for EU sunrise...
From: Scott Tilley <[email protected]>
Date: Thu, 23 Nov 2006 17:28:32 -0800
Delivered-to: [email protected]
In-reply-to: <C0DBF05CD6EFA942992A028029605C8F04C6C84F@SYDEXM02.ent.foxtel.com.au>
References: <C0DBF05CD6EFA942992A028029605C8F04C6C84F@SYDEXM02.ent.foxtel.com.au>
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User-agent: Thunderbird 1.5.0.8 (Windows/20061025) 
Hi Nic
8 FETs in 4 push pull modules combined with a 4 port Wilkinson combiner. Combiner provides LPFing. SWR protection is included on the output. 
See: http://imagenisp.ca/jsm/VA7LF.html

It has two settings:
STUNT - 1200W
KILL - 2400W
and a little known possibility for a third setting but you really must be mad to suggest I try it. I have about double the PSU capability of what it needs but not the courage to try...
I use a supplementary 400W amp to 'quantify' the antenna match then switch in the big amp. Just makes the switching requirements easier and safer for the system as a whole. 

73 Scott

Nick Mclean (SYD) wrote:

What design is your PA?
73's
Nic McLean
VK2KXN / VK5ZAT


1200W out and the rain is sizzling on the coil...

silly boy...won't you ever learn?


Natural coil cooling.... friendly to the enviroment, efficient and

free.

Hmmm.
J. 






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