[Boatanchors] Interesting place to find HV and amp parts . . .

[Carl]

Actually, (A rather overworked word)
The majority of industrial RF heating tubes used in the furniture and 
sealing industry make poor candidates for ham linear use. They are 
designed for Class C oscillator service and are rather poor performers 
in Class AB or B.

There are some ISM applications that do use highly linear tubes, 
particularly MRI equipment. Full power MRI pulls are the source of many 
of the 3CX800A7, 3CX1500A7/8877 variety and also the very popular YC-156 
which will be the last amp tube you will ever need.

http://www.g8wrb.org/yc156/

Carl
KM1H



----- Original Message ----- 
From: "James M. Walker" <chejmw at buffalo.edu>
To: <boatanchors at mailman.qth.net>
Sent: Wednesday, February 04, 2009 7:22 PM
Subject: Re: [Boatanchors] Interesting place to find HV and amp parts . 
. .


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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