TenTec
[Top] [All Lists]

[TenTec] Jupiter SWR, and VSWR generally

To: <tentec@contesting.com>
Subject: [TenTec] Jupiter SWR, and VSWR generally
From: AC5E@aol.com (AC5E@aol.com)
Date: Wed Jan 29 21:38:36 2003
Sorry Carl, I have trimmed many a stub in my time, but the coax "matchboxes" 
I mentioned were just so much RG8. At the time they were popular, surplus RG8 
was free for hauling off at most military bases - and we poor boys made the 
most of the opportunity. Some for scrap copper, some like me to make good use 
of. You ought to try that poor man's antenna tuner, by the way. It works, 
it's usually low loss, and it's cheap. Heavy though. And you need a 64 foot 
section if you are going to use it on top band. 

Jerry has done his usual excellent job, and the only other thing I can add, 
when the Bird Wattmeters came out the original instruction sheet mentioned 
that "standing waves" don't stand unless the line is some multiple of a half 
wave from the meter to the load. Which I knew from trying to jiggle 
frequencies on the much modified ARC5 we used in lab to get things stable 
enough to demonstrate the slotted line. 

That - and the fact that another source of SWR meter/bridge error is that I 
have quite a number of headaches with diodes whose conduction points were't 
stable. 0.78 volts today, 0.835 volts yesterday! I guess I'm from the old 
school but an experiment whose result is not repeatable is a problem. 

73  Pete Allen  AC5E
<Prev in Thread] Current Thread [Next in Thread>