Richard,
My previous experience with TWT amplifiers is that as you say they do
not like excessive VSWR's. Chamber efects is one thing that would cause bad
VSWR. Another way is turning them on before the antenna is attached.
Another way is to misthread the acble attached to the TWT.
I seem to remember that certain TWT's came with an option of an
isolator on the input that made them better able to handle short term bad
VSWR's. If the one you are looking at has this option it would be a plus.
My general experience is be very carfeul with them and still they may
not last that long. Check the repair history of the used TWT if you can.
Sandy Mazzola
-----Original Message-----
From: richwo...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Wednesday, November 13, 2002 9:00 AM
To: emc-p...@majordomo.ieee.org
Subject: Radiated immunity testing above 1 GHz
I need to make a decision on an amplifier for radiated immunity testing in
the 1-2 GHz range. The choices appear to be a new solid state amplifier ( I
have not located a used one) or a used TWT amp. Is anyone using a TWT
amplifier for radiated immunity testing above 1 GHz? Do I need to be
concerned about protecting the tube from damage caused by excessive VSWR
cause by, perhaps, chamber effects? Is there anything else I need to know
about TWT amps (yeah, I know - throw it way if the tube dies)?
Richard Woods
Sensormatic Electronics
Tyco International
-------------------------------------------
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/
To cancel your subscription, send mail to:
majord...@ieee.org
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Ron Pickard: emc-p...@hypercom.com
Dave Heald: davehe...@attbi.com
For policy questions, send mail to:
Richard Nute: ri...@ieee.org
Jim Bacher: j.bac...@ieee.org
All emc-pstc postings are archived and searchable on the web at:
http://ieeepstc.mindcruiser.com/
Click on "browse" and then "emc-pstc mailing list"
-------------------------------------------
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/
To cancel your subscription, send mail to:
majord...@ieee.org
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Ron Pickard: emc-p...@hypercom.com
Dave Heald: davehe...@attbi.com
For policy questions, send mail to:
Richard Nute: ri...@ieee.org
Jim Bacher: j.bac...@ieee.org
All emc-pstc postings are archived and searchable on the web at:
http://ieeepstc.mindcruiser.com/
Click on "browse" and then "emc-pstc mailing list"
