Actually,
the devices being spoken of cover a range from around 100 Khz
to approximately 900 Mhz, in various power levels, with some
really nice, and large power capabilities up to around 30 KW.
Here where I work, University Chemistry Dept. we have Mass Spec
units that go down to the low end, and wafer coating gear that goes
to the high end. One particularly fascinating unit is the 100 KW,
480Khz unit, followed byt the 15KW (tunable) 13.56 unit.
For regular folks unfortunately these require three phase power
and lots of it. However, in most units the driver sections are in the 1 KW
range and make great amplifiers for the Amateur community, willing to
make the necessary modifications to them.
I have several pictures of the units here, if anyone is interested, or
one can do a search on E-bay for RF Plasma, or ENI, or RFS, and
see some other examples.
Jim
WB2FCN
----- Original Message -----
From: Revcom
To: Bob Hardie- W5UQ ; david freeman
Cc: boatanchors at mailman.qth.net
Sent: Wednesday, February 04, 2009 6:50 PM
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts . . .
What do those things run on? 10 something MHz? Big MRI transmitter, er scanner, at regional Hosp
runs at 25.407Mhz, lotsa watts.
Rod
K0EQH
----- Original Message -----
From: Bob Hardie- W5UQ
To: david freeman
Cc: boatanchors at mailman.qth.net
Sent: Wednesday, February 04, 2009 5:34 PM
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts . . .
I used to work and maintain one of those transmitters... I mean seam sealers.
A "Tent and Awning" company in Tulsa asked me to come out and look at their splicer. I was saying, "what????" Well, I was a consulting engineer and decided to go look. This was in the 80's. When I got there I found basically an AM transmitter that caused enough RF in the BIG BAR that was several feet long, that it melted the plastic, or whatever materials, together. I fixed the transmitter and it worked.
I have to admit that this was, at first thought, strange. But it turned out to be "simple"..... A transmitter to splice material together???? oh well.......
Live and learn...
Bob W5UQ
david freeman wrote:
My sister and her husband own and tent/awning shop. They use a number of RF seemers to melt the vinyl canvas together. The two pieces of vinyl are smashed between two aluminum bars about 18" long. The bars serve as part of the capacitance in the tank circuit (I think). I look at their machinery and see some pretty heavy duty parts that would easily make a multi-kW rig.
Dave, WW8S
----- Original Message -----
From: butwheat <butwheat73 at gmail.com>
To: boatanchors at mailman.qth.net
Subject: [Boatanchors] Interesting place to find HV and amp parts . . .
Date: Wed, 4 Feb 2009 10:16:50 -0500
Strange place to find these parts:
http://www.landlmachinery.com/Parts.html
HTH es 73 de Mark KX8XX
...-.-
.
.
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