I just tuned a set of 641's with my IFR1500, a couple of 3dB pads, and a dummy
load for the unused port while tuning it up. That's all you should need to get
them tuned. You can also use the RL bridge to optimize the 50 ohm match. See
this article:
http://www.eagle-1st.com/notes/duplex/body.htm
I also have the Wiltron RL bridge that I used to use for testing antennas, but
no longer use that since I have access to an Anritsu Sitemaster. For example,
the RL bridge will allow you to sweep an antenna using the IFR1500 and see what
the resonant point of the antenna is. The old way would be to take many VSWR
readings with a wattmeter and plot the readings.
73, Joe, K1ike
---- [EMAIL PROTECTED] wrote:
>
> Gentlemen,
> Will be starting a new science project setting up Wacom 641 on 2 meters.
> Have a Rohde & Schwarz monitor receiver with S meter, DB pads, dummy loads
> etc. Plus an IFR 1500. But I see comments on a unit called a 'return loss
> bridge' for the IFR. How important is this return loss bridge and what is
> it's
> claim to fame? Do I really need one? Also have an old HP 8554B Spectrum
> Analyzer.
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