On Sun, 08 May 2005 06:54:50 -0700, Wes Stewart
wrote:

On Sun, 08 May 2005 00:19:04 GMT, Bob Miller
wrote:

On Sat, 07 May 2005 16:14:15 -0700, wrote:

What tool would one use to measure the SWR at 900Mhz?

I've never seen swr bridges that went that high.

A specific model number and source would be helpful...


Paul (Kl7JG)



The manual for my Bird 43 watt meter says it is rated for service up
to 2300 Mhz. I've used it up to the 440 Mhz range with no problem.

One Bird source is http://www.rfparts.com/

Another, with both new and used Birds is http://www.radiodan.com/

The problem with the Bird is that it requires considerable power to
run it. With 1 watt available, you're (the OP) kind of out of luck.

Bird does have a 1-watt measuring element, part 800-1, for 800-950 Mhz
-- there's also a 2.5 watts element, the 800-2.

Still, this is all may a bit pricey, about $4-500 for the meter and
one element -- maybe he can borrow?

bob
k5qwg



The OP has access to a spectrum analyzer/tracking generator. I
suggest a directional coupler with the main arm driven by the
generator, the coupled arm as the input to the SA and the thru port to
the DUT. Calibrate the SA with a short on the output of the coupler
(100% reflection) and measure return loss directly in dB on the
screen.

A similar idea using diode detection is he

http://www.qsl.net/n9zia/24swr/