[Fwd: Re: Slight frequence difference noted]

[Andre Kesteloot]

-------- Original Message --------
Subject: Re: Slight frequence difference noted
Date: Thu, 20 May 2004 21:06:24 -0400
From: Andre Kesteloot <andre.kesteloot at verizon.net>
Reply-To: andre.kesteloot at ieee.org
To: hal <hfeinstein at cox.nospam.net>
References: <6.0.1.1.0.20040513171957.028391c0 at 127.0.0.1>

hal wrote:

[...] 

> 
> The other big surprise was the prolific amount of reflected signals from 
> aircraft. These signals are the TV carrier signal reflected off a moving 
> aircraft. 

that was the basis for some observation by a BPO (British Post Office) employee from 1932 through 1935, that eventually encouraged the British to develop the first VHF radar. Under the leadership of Wtson-Watt, they forged ahead and designed the first high power radar transmitter on 10 meter wavelength, using giant tubes (valves) of 60 kW in 1936. (40 kV on the plate, 20 amps @120 v AC for the filaments). 

73
André