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[Amps] test frequency TSPA

To: amps@contesting.com
Subject: [Amps] test frequency TSPA
From: "John T. M. Lyles" <jtml@lanl.gov>
Date: Fri, 20 May 2005 12:32:05 -0600
List-post: <mailto:amps@contesting.com>
The 700 watt RF output is measured in a nonlinear power amplifer, 
used for industrial RF power at 27.12 MHz. This is an FCC-authorized 
frequency for ISM equipment which allows some radiation, not much. As 
Vic alluded to below. Part 18 of the Rules and Regs cover this sort 
of work.

In a linear amplifier, or an amplifier requiring some sort of 
envelope modulation, one would have to derate the power quite a bit. 
However, in a class E (EER) amplifier, you might be able to pull full 
power from it as stated. The new SGC amplifer apperars to do just 
that, although not sure whose devices they are using.

73
John
K5PRO

>Has anyone tried the ARF1505 FET in any solid state amps yet? The 
>characteristics look very good and it is a HV FET running at 300 Vdc 
>with a 700 watt output. It is for operation primarily from 2 to 30 
>Mhz. Below is a link to the page it's at and where the spec sheet 
>can be downloaded. Also notice the test frequency given on the spec 
>sheet, wonder why they used and or published that?


>Because it's one of the standard frequencies (the other is 13.56 MHz) for ISM
>devices like plasma generators.  Not what you're thinking!
>
>--
>73,
>Vic, K2VCO
>Fresno CA
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