My first set of 220Mhz duplexers (homebrew) were tuned up with an HT and a
box with a 50 ohm resistor, diode, and capacitor in it. I fed the
rectified signal voltage to a oscilloscope. I then tuned for either
minimum or maximum voltage on the scope, depending upon if I was tuning the
notch or the pass.
Where there's a will there's a way. Maybe not the best way, but it worked
well enough to get the repeater on the air with reasonable performance.
73, Joe, K1ike
At 08:38 AM 12/23/2005 -0600, you wrote:
>I once used a 10 Watt freq agile transmitter and wattmeter to set pass freq
>and a bearcat scanner and a tunable variable frequency generator to set
>notch on a wacom 678 UHF duplexer. Tuned notch for noisiest signal into
>scanner.
>
>Steve
>NU5D
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