At 7/29/2012 07:25 PM, lakeland wrote:
Military had a ton of stuff operating at 400 Hz at one time
Now that you mention it, I think many IBM mainframes also ran at 400
Hz. In those days before switching power supplies, a motor-generator
set to raise the mains frequency to 400 Hz was more efficient than
trying to generate sufficient DC power at 60 Hz. (They needed a LOT of power.)
How much juice does this puppy use? It says solid state; I wonder if
the multi-kilowatt transmitter is solid state or if they needed a
klystron or other tube final amp.
(Of course I think hams are allowed a kW on the 5.8 GHz band. Could
be fun in a UHF contest. ;-) )
----- Reply message -----
From: "Blair Davis" <the...@wmwisp.net>
To: "WISPA General List" <wireless@wispa.org>
Subject: [WISPA] trigger DFS for all your friends
Date: Sun, Jul 29, 2012 6:59 pm
with a 400Hz power supply, it almost sounds like it was for airborne use...
On 7/29/2012 12:58 PM, Eric Williams {WISP} wrote:
Ralph the link you sent is to a add ? What is the DFS widget ?
Eric Williams {W7EMW}
Williams Tel Data / SDWISP
The man with a secure wireless plan!
8130 La Mesa Bl #700
La Mesa Ca 91942
619-698-3904 {office}
Message: 1
Date: Sun, 29 Jul 2012 09:49:56 -0400
From: Ralph <mailto:ralphli...@bsrg.org><ralphli...@bsrg.org>
Subject: [WISPA] Real World example 5.4GHz RADAR- and YOU can own it
To: 'WISPA General List' <mailto:wireless@wispa.org><wireless@wispa.org>
Message-ID: <006f01cd6d91$11c178f0$35446ad0$@org>
Content-Type: text/plain; charset="us-ascii"
You come across the weirdest things at a Hamfest!
Now you can trigger DFS for all your friends.
I posted the info about it (minus the owner's info) at
<http://ads22.imgur.com/all>http://ads22.imgur.com/all
T H I S I S N O T M I N E.
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